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Shi Y, Wang J, Wan H, Wan D, Wang Y, Li Y. Effective removal of nitrate in water by continuous-flow electro-dialysis ion exchange membrane bioreactor (CF-EDIMB): Performance optimization and microbial analysis. Chemosphere 2023; 341:139880. [PMID: 37619757 DOI: 10.1016/j.chemosphere.2023.139880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/11/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
The use of nitrogen fertilizer has been causing nitrate pollution in groundwater, and there is an urgent need for efficient approach to remove nitrate from groundwater. In our job, a novel continuous-flow electrodialysis ion exchange membrane bioreactor system (CF-EDIMB) was set up to remove nitrate (NO3-) from water for the first time. Nitrate removal was positively dependent on water chamber HRT and voltage; voltage had significant effect on the water chamber effluent pH; acetate utilization efficiency was closely correlated with acetate dosage. The optimal conditions forecasted through response surface method (RSM) were given as follows: water chamber HRT was 20 h, biological chamber HRT was 24 h, voltage was 6.65 V and acetate dosage was 454.99 mg/L, dedicating to nitrate removal of 81.90% (83.70% in prediction), water chamber effluent pH of 7.10 (7.00 in prediction) and acetate utilization efficiency of 92.87% (96.51% in prediction). Meanwhile, microorganisms are crucial for nitrate removal, and the microbial community was not sensitive to the variation of acetate dosage. The microbial analysis results indicated that when CF-EDIMB system was operated for 20 d, the sulfate-reducing bacteria Sediminibacterium appeared in the biological chamber, and the effluent sulfate concentration of biological chamber was decreased. During the whole operation, Thauera was the dominant genus. Denitrifying functional genes nirS presented a better expression than the gene narG, and there was no accumulation of nitrite.
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Affiliation(s)
- Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Zhengzhou Key Laboratory of Water Safety and Water Ecology Technology, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Jiekai Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Zhengzhou Key Laboratory of Water Safety and Water Ecology Technology, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Heyu Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Zhengzhou Key Laboratory of Water Safety and Water Ecology Technology, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Zhengzhou Key Laboratory of Water Safety and Water Ecology Technology, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yanan Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Ying Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Zhengzhou Key Laboratory of Water Safety and Water Ecology Technology, Henan University of Technology, Zhengzhou, Henan, 450001, China
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2
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Jin J, Shi Y, Zhang B, Wan D, Zhang Q. An integrated method for studying the biodegradation of benzo[a]pyrene by Citrobacter sp. HJS-1 and interaction mechanism based on the structural model of the initial dioxygenase. Environ Sci Pollut Res Int 2023; 30:85558-85568. [PMID: 37389752 DOI: 10.1007/s11356-023-28505-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 06/26/2023] [Indexed: 07/01/2023]
Abstract
A bacterial strain Citrobacter sp. HJS-1 was discovered from the sludge in a drainage canal of a coal mine. Firstly, its biodegradation capacity for benzo[a]pyrene (BaP) was detected under different concentrations. The results proved that the strain possessed excellent biodegradation capacity for BaP with high-efficiency degradation rates ranging from 78.9 to 86.8%. The highest degradation rate was observed in the low-concentration sample, and the high-concentration BaP had a slight influence on the biodegradation capacity due to the potential toxicity of BaP and its oxygen-containing derivatives. Meanwhile, the degradation test for the other five aromatic hydrocarbons (2- to 4-ring) proved that the strain had a comprehensive degradation potential. To clarify the biodegradation mechanism of BaP, a dioxygenase structure was constructed by homology modeling. Then, the interactions between dioxygenase and BaP were researched by molecular simulation. Combined with the identification of the vital BaP-cis-7,8-dihydrodiol intermediate and the interaction analysis, the initial oxidation mode and the binding site of BaP were revealed in the dioxygenase. Taken together, this study has offered a way to understand the biodegradation process of BaP and its interaction mechanism based on experimental and theoretical analysis.
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Affiliation(s)
- Jingnan Jin
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, No. 100 Lianhua Street, High-tech Industrial Development District, Zhengzhou, 450001, Henan, China.
| | - Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, No. 100 Lianhua Street, High-tech Industrial Development District, Zhengzhou, 450001, Henan, China
| | - Baozhong Zhang
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, No. 100 Lianhua Street, High-tech Industrial Development District, Zhengzhou, 450001, Henan, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, No. 100 Lianhua Street, High-tech Industrial Development District, Zhengzhou, 450001, Henan, China
| | - Qingye Zhang
- College of informatics, Huazhong Agricultural University, Wuhan, 430070, China
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Jin J, Shi Y, Zhang B, Wan D, Zhang Q, Li Y. Biotransformation of benzo[ a]pyrene by Pannonibacter sp. JPA3 and the degradation mechanism through the initially oxidized benzo[ a]pyrene-4,5-dihydrodiol to downstream metabolites. RSC Adv 2023; 13:18878-18887. [PMID: 37350855 PMCID: PMC10282733 DOI: 10.1039/d3ra01453c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 06/07/2023] [Indexed: 06/24/2023] Open
Abstract
Owing to its adverse effects on the environment and human health, benzo[a]pyrene (BaP) has attracted considerable attention and has been used as a model compound in ecotoxicology. In this study, Pannonibacter sp. JPA3 as a BaP-degrading strain was isolated from the production water of an oil well. The strain could remove 80% of BaP at an initial concentration of 100 mg L-1 after 35 d culture. The BaP-4,5-dihydrodiol, BaP-4,5-epoxide, 5-hydroxychrysene, and 2-hydroxy-1-naphthoic acid metabolites were identified in the biodegradation process. Simultaneously, the gene sequence coding for dioxygenase in the strain was amplified and a dioxygenase model was built by homology modeling. Combined with the identification of the metabolites, the interaction mechanism of BaP with dioxygenase was investigated using molecular docking. It was assumed that BaP was initially oxidized at the C4-C5 positions in the active cavity of dioxygenase. Moreover, a hypothesis for the progressive degradation mechanism of BaP by this strain was proposed via the identification of the downstream metabolites. In conclusion, our study provided an efficient BaP degrader and a comprehensive reference for the study of the degradation mechanism in terms of the degrading metabolites and theoretical research at the molecular level.
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Affiliation(s)
- Jingnan Jin
- School of Environmental Engineering, Henan University of Technology No. 100 Lianhua Street, High-Tech Industrial Development District Zhengzhou Henan 450001 China +86-371-67756982 +86-371-67756982
| | - Yahui Shi
- School of Environmental Engineering, Henan University of Technology No. 100 Lianhua Street, High-Tech Industrial Development District Zhengzhou Henan 450001 China +86-371-67756982 +86-371-67756982
| | - Baozhong Zhang
- School of Environmental Engineering, Henan University of Technology No. 100 Lianhua Street, High-Tech Industrial Development District Zhengzhou Henan 450001 China +86-371-67756982 +86-371-67756982
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology No. 100 Lianhua Street, High-Tech Industrial Development District Zhengzhou Henan 450001 China +86-371-67756982 +86-371-67756982
| | - Qingye Zhang
- College of Informatics, Huazhong Agricultural University Wuhan 430070 China
| | - Ying Li
- School of Environmental Engineering, Henan University of Technology No. 100 Lianhua Street, High-Tech Industrial Development District Zhengzhou Henan 450001 China +86-371-67756982 +86-371-67756982
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Cao G, Zhao J, Zhao G, Wan D, Wu Z, Li R, He Q. Determination of the Acute and Chronic Toxicity of Sulfate from the Sulfur Autotrophic Denitrification Process to Juvenile Zebrafish ( Danio rerio). ACS Omega 2022; 7:47165-47173. [PMID: 36570241 PMCID: PMC9773951 DOI: 10.1021/acsomega.2c06320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Sulfur-based materials are widely used as electron donors for denitrification to enhance nitrogen removal from water. This leads to an increased sulfate concentration in the effluent or sulfate accumulation in recirculating aquaculture systems. This study explored acute and chronic toxicity of sulfate to juvenile zebrafish (Danio rerio) and investigated the histopathological changes in the gills of juvenile zebrafish exposed to sulfate. Results show that zebrafish had a high tolerance to sulfate, with no acute toxicity at sulfate concentrations from 250 to 3200 mg/L. For the chronic toxicity study, it was found that zebrafish mortality decreased with the increase in sulfate concentrations ranging from 250 to 1500 mg/L. In contrast, when the sulfate concentration was 1500-3000 mg/L, zebrafish mortality increased with the increasing sulfate concentration. In addition, in the ion balance test, KCl was added to balance the effects of Na+ from the Na2SO4 used to obtain the desired sulfate concentrations, showing that fish mortality correspondingly increased with increasing KCl addition. Furthermore, when living in an environment with elevated sulfate concentrations for a long period, changes were observed in the morphology, behavior, and gill tissue of the zebrafish, including slow and lateral swimming; bottom settling; and large opening and closing, lamellar fusion, and necrosis of gills. This research reveals the toxicity of sulfate to aquatic organisms, providing a scientific basis for the promotion and application of sulfur or sulfur-based materials in autotrophic reduction processes for wastewater treatment.
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Affiliation(s)
- Gaigai Cao
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
| | - Junting Zhao
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
| | - Guanghua Zhao
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
| | - Dongjin Wan
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
| | - Zhenjun Wu
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
| | - Rui Li
- State
Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Qiaochong He
- College
of Environmental Engineering, Henan University
of Technology, Zhengzhou 450001, China
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5
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Qu D, Zhang J, Wan D, Niu Z. Perchlorate removal by a combined heterotrophic and bio-electrochemical hydrogen autotrophic system. Sci Total Environ 2022; 851:158178. [PMID: 35995156 DOI: 10.1016/j.scitotenv.2022.158178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/09/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Here, a novel combined heterotrophic and bio-electrochemical hydrogen autotrophic (CHBHA) system was developed to remove perchlorate under low chemical dosages and energy consumption. The perchlorate removal performance at various hydraulic retention times (HRTs) and acetate dosages was investigated. For influent containing 10 ± 0.10 mg/L perchlorate, the optimal removal efficiency by the CHBHA system was 98.96 ± 1.62 %, 92.99 ± 2.99 %, 97.85 ± 0.41 %, and 98.24 ± 1.56 % at different operating stages. Perchlorate was mainly removed in the heterotrophic part (H-part) at a sufficient HRT (6 h) and acetate dosage (14.75 mg/L). At other stages, perchlorate was synergistically removed by the H-part and electrochemical hydrogen autotrophic part (E-part). Since the H-part removed some perchlorate, the E-part's applied current decreased, thus reducing energy costs. The maximum current efficiency of CHBHA system was 22.09 %. Compared with the single E-part system, the combined system used 65 % less energy. Perchlorate was converted into active chlorine in the E-part, which improved the effluent quality. The bacterial community structures of the two parts were significantly different. Comamonas, Dechloromonas, Acinetobacter, and Chryseobacterium were enriched in the H-part, and the dominant genera in the E-part were Thauera, Azonexus, Hydrogenophaga, and Tissierella.
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Affiliation(s)
- Dan Qu
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China.
| | - Junhui Zhang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Dongjin Wan
- Collage of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Zhenhua Niu
- Collage of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
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Wan D, Wang Y, Liu Y, Gu M, Liu Y, Xiao S, He Q. Effect of nitrate and sulfate coexistence on hydrogen autotrophic reduction of antimonate (Sb(V)) and microbial community structures. Chemosphere 2022; 308:136263. [PMID: 36055583 DOI: 10.1016/j.chemosphere.2022.136263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 08/17/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen autotrophic bioreduction of antimonate (Sb(V)) to antimonite (Sb(III)) is an alternative approach for removing antimony (Sb) from water. This study investigated Sb(V) reduction kinetics and the effects of various parameters on the Sb(V) removal performance in a hydrogen autotrophic reaction system (HARS). Sb(V) reduction in the HARS was well fitted to the Michaelis-Menten model, showing a positive correlation between the reaction rate and biomass. The maximum specific substrate removal rates were 0.29-4.86 and 6.82-15.87 mg Sb(V)/(g·VSS·h) at initial Sb(V) concentrations of 500 μg/L and 10 mg/L, respectively. Coexisting nitrate significantly inhibited Sb(V) reduction, and the inhibition intensified with increasing nitrate concentration. However, coexisting sulfate had a positive effect on Sb(V) reduction, and the sulfate effectively enhanced total antimony (TSb) removal performance by generating sulfide from sulfate reduction. Illumina high-throughput sequencing technology was used to determine the changes in microbial community structure during different periods in the HARS, revealing the effects of co-existing ions on the dominant Sb(V) reducing bacteria. In the HARS, Longilinea and Terrimonas were the dominant genera in the presence of nitrate, and Longilinea was the dominant genus in the presence of sulfate, at initial Sb(V) concentration of 500 μg/L. When the concentration of Sb(V) was 10 mg/L, Longilinea and Thauera were the dominant genus in the HARS for treating water co-polluted with nitrate and sulfate, respectively. These results provide a theoretical basis of the application of HARS for the bio-remediation of Sb(V) contaminated water.
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Affiliation(s)
- Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan, 450001, China.
| | - Yiduo Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yang Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Mengqi Gu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan, 450001, China.
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Wan D, Cao Y, Shi Y, Li Q, Li Y, Zhang Z, Han X, Gao Y. Construction of heterotrophic-sulfur autotrophic integrated fluidized bed reactor for simultaneous and efficient removal of compound pollution of perchlorate and nitrate in water. Chemosphere 2022; 307:135944. [PMID: 35961446 DOI: 10.1016/j.chemosphere.2022.135944] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/31/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
A heterotrophic sulfur autotrophic integrated fluidized bed reactor was established for simultaneous and efficient removal of ClO4- and NO3- from water. The optimum operating conditions forecasted through the response surface method (RSM) were the hydraulic retention time (HRT) of 0.50 h, the influent acetate (CH3COO-) concentration of 55 mg/L and the reflux ratio of 14, contributing to ClO4- and NO3- removal of 98.99% and 99.96%, respectively, without secondary pollution caused by residual carbon (NPOC <3.89 mg/L). Meanwhile, the effluent pH fluctuated in a range of 6.70-8.02 and sulfur-containing by-products (i.e., SO42- and S2-) could be controlled by adjusting operation conditions throughout the experimental stage. The increase of the influent CH3COO- concentration reduced the load borne by autotrophic reduction process and further reduced SO42- production. Shortening HRT, increasing the influent CH3COO- concentration and decreasing the reflux ratio could all reduce alkalinity consumption. Shortening HRT and decreasing the reflux ratio could shorten contact time between sulfur and water and thus inhibit S0 disproportionation. High-throughput sequencing result showed that Proteobacteria and Chlorobi were the dominant bacteria. Sulfurovum, Sulfuricurvum and Ignavibacterium were the major heterotrophic denitrifying bacteria (DB)/perchlorate reducing bacteria (PRB), Ferritrophicum and Geothrix were DB, and Chlorobaculum was S0 disproportionation bacteria.
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Affiliation(s)
- Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan, 450001, China; Institute for Carbon Neutrality, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yang Cao
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan, 450001, China; Institute for Carbon Neutrality, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Qi Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Ying Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan, 450001, China; Institute for Carbon Neutrality, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Zhixiang Zhang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Xinze Han
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yafei Gao
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
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Gu M, Wang Y, Wan D, Shi Y, He Q. Electrodialysis ion-exchange membrane bioreactor (EDIMB) to remove nitrate from water: Optimization of operating conditions and kinetics analysis. Sci Total Environ 2022; 839:156046. [PMID: 35597341 DOI: 10.1016/j.scitotenv.2022.156046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
Nitrate pollution has become a worldwide problem. In this study, we remove nitrate from water by electrodialysis ion-exchange membrane bioreactor (EDIMB) and enabling simultaneous nitrate enrichment and denitrification. In this reactor, nitrate migrated from the water chamber to the biological chamber via electrodialysis and was degraded by microorganisms. The effects of voltage and biomass concentration on the reactor performance were examined, and the kinetics data of the water chamber and biological chamber were fitted. The experimental results showed that the migration of nitrate in the water chamber conformed to the first-order model, and the constructed zero-Michaelis-Menten model described changes in nitrate concentration in the biological chamber. Furthermore, when the inflow nitrate concentration was 40 mg N/L, 5 V was the best voltage, and 3.00 g VSS/L was the best biomass concentration. The nitrate removal rate in the water chamber was 98.94%, and there was no accumulation of nitrate or nitrite in the biological chamber. Compared with traditional ED processes, the nitrate removal efficiency was 8.86% higher, and the current efficiency was 22.14% higher. The total organic carbon (TOC) of the water chamber was only 1.43 mg C/L, which proves that the structure of the EDIMB confined the denitrifying bacteria and organic carbon donors in the biological chamber and avoided secondary pollution in the water chamber. Microbial community analysis showed that Thauera (66.06%) was the dominant bacterium in the EDIMB system, and Azoarcus (9.81%) was a minor denitrifying genus.
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Affiliation(s)
- Mengqi Gu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Yanan Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China; Institute for Carbon Neutrality, Henan University of Technology, Zhengzhou, Henan 450001, China.
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China
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9
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Stone R, Burgess J, Balukoff N, Wikramanayake T, Elliot S, Azzam G, Samuels S, Wan D, Longaker M, Tomic-Canic M. 763 Radiation injury upregulates miR-196, increases dermal collagen, and triggers a pro-fibrotic genomic response that spreads in a murine model of radiation-induced skin fibrosis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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He Q, Liu Y, Wan D, Liu Y, Xiao S, Wang Y, Shi Y. Enhanced biological antimony removal from water by combining elemental sulfur autotrophic reduction and disproportionation. J Hazard Mater 2022; 434:128926. [PMID: 35452992 DOI: 10.1016/j.jhazmat.2022.128926] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Antimony (Sb), a toxic metalloid, has serious negative effects on human health and its pollution has become a global environmental problem. Bio-reduction of Sb(V) is an effective Sb-removal approach. This work, for the first time, demonstrates the feasibility of autotrophic Sb(V) bio-reduction and removal coupled to anaerobic oxidation of elemental sulfur (S0). In the S0-based biological system, Sb(V) was reduced to Sb(III) via autotrophic bacteria by using S0 as electron donor. Meanwhile, S0 disproportionation reaction occurred under anaerobic condition, generating sulfide and SO42- in the bio-systems. Subsequently, Sb(III) reacted with sulfide and formed Sb(III)-S precipitate, achieving an effective total Sb removal. The precipitate was identified as Sb2S3 by SEM-EDS, XPS, XRD and Raman spectrum analyses. In addition, it was found that co-existing nitrate inhibited the Sb removal, as nitrate is the favored electron acceptor over Sb(V). In contrast, the bio-reduction of co-existing SO42- enhanced sulfide generation, followed by promoting Sb(V) reduction and precipitation. Illumina high-throughput sequencing analysis revealed that Metallibacterium, Citrobacter and Thiobacillus might be responsible for Sb(V) reduction and S0 disproportionation. This study provides a promising approach for the remediation of Sb(V)-contaminated water.
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Affiliation(s)
- Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China
| | - Yang Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China.
| | - Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yiduo Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
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11
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Chen Y, Shi Y, Wan D, Zhao J, He Q, Liu Y. Synergistic adsorption and advanced oxidation activated by persulfate for degradation of tetracycline hydrochloride using iron-modified spent bleaching earth carbon. Environ Sci Pollut Res Int 2022; 29:24704-24715. [PMID: 34825336 DOI: 10.1007/s11356-021-17435-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
At present, tetracycline hydrochloride (TCH) is a widely used antibiotic, and is often detected in water, posing a serious harm to human and ecological health. In this study, spent bleaching earth (SBE) was pyrolyzed to obtain spent bleaching earth carbon (SBE@C) and the nano Fe0/SBE@C prepared after zero-valent iron loading was adopted to remove TCH in water for the first time. The combination of nano Fe0/SBE@C and PS, the strong adsorption of SBE@C coupled with the oxidation of free radicals could achieve TCH efficient removal. The effects of nano Fe0 load, nano Fe0/SBE@C dosage, solution initial pH, and PS/TCH molar ratio on TCH removal efficiency in nano Fe0/SBE@C + PS system were studied. The results indicate that the optimal reaction conditions are 5% nano Fe0 load, 0.2 g/L nano Fe0/SBE@C dosage, initial pH of 3, PS/TCH molar ratio of 100:1. Under these conditions, TCH removal efficiency could reach 91%. Meanwhile, response surface methodology (RSM) was applied to predict optimal value of reaction conditions. The removal efficiency corresponding to the predicted optimal conditions was consistent with the actual removal efficiency obtained from the experiment. Moreover, six reaction systems were tested, and TCH removal efficiency in the SBE@C + PS system was 22.6%. When nano Fe0 was loaded on SBE@C, TCH removal efficiency in Fe0/SBE@C + PS system increased to 78.2%, in which TCH was first adsorbed on the surface of nano Fe0/SBE@C, and then was degraded by the oxidation of SO4•- and •OH. Totally, the nano Fe0/SBE@C + PS system displayed excellent TCH removal efficiency, good stability and reusability, exhibiting a promise toward TCH removal.
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Affiliation(s)
- Yue Chen
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
- Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, 450001, Henan, China
| | - Jihong Zhao
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
- Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, 450001, Henan, China
| | - Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China.
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Chen Y, Shi Y, Wan D, Liu Y, Wang Y, Han X, Liu M. Degradation of bisphenol A by iron-carbon composites derived from spent bleaching earth. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128376] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Peng JB, Peng YT, Lin P, Wan D, Qin H, Li X, Wang XR, He Y, Yang H. Differentiating infected focal liver lesions from malignant mimickers: value of ultrasound-based radiomics. Clin Radiol 2021; 77:104-113. [PMID: 34753587 DOI: 10.1016/j.crad.2021.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 10/11/2021] [Indexed: 12/12/2022]
Abstract
AIM To establish an ultrasound-based radiomics model through machine learning methods and then to assess the ability of the model to differentiate infected focal liver lesions from malignant mimickers. MATERIALS AND METHODS A total of 104 patients with infected focal liver lesions and 485 patients with malignant hepatic tumours were included, consisting of hepatocellular carcinoma (HCC), cholangiocarcinoma (CC), combined hepatocellular-cholangiocarcinoma (cHCC-CC), and liver metastasis. Radiomics features were extracted from grey-scale ultrasound images. Feature selection and predictive modelling were carried out by dimensionality reduction methods and classifiers. The diagnostic effect of the prediction mode was assessed by receiver operating characteristic (ROC) curve analysis. RESULTS In total, 5,234 radiomics features were extracted from grey-scale ultrasound image of every focal liver lesion. The ultrasound-based radiomics model had a favourable predictive value for differentiating infected focal liver lesions from malignant hepatic tumours, with an area under the curve (AUC) of 0.887 and 0.836 (HCC group), 0.896 and 0.766 (CC group), 0.944 and 0.754 (cHCC-CC group), 0.918 and 0.808 (liver metastasis group), and 0.949 and 0.745 (malignant hepatic tumour group) for the training set and validation set, respectively. CONCLUSIONS Ultrasound-based radiomics is helpful in differentiating infected focal liver lesions from malignant mimickers and has the potential for use as a supplement to conventional grey-scale ultrasound and contrast-enhanced ultrasound (CEUS).
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Affiliation(s)
- J B Peng
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - Y T Peng
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - P Lin
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - D Wan
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - H Qin
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China
| | - X Li
- GE HealthcareShanghai, People's Republic of China
| | - X R Wang
- GE HealthcareShanghai, People's Republic of China
| | - Y He
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China.
| | - H Yang
- Department of Medical Ultrasonics, First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, People's Republic of China.
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Chen J, Zhang Y, Wu B, Ning Z, Song M, Zhang H, Sun X, Wan D, Li B. Porous g-C 3N 4 with defects for the efficient dye photodegradation under visible light. Water Sci Technol 2021; 84:1354-1365. [PMID: 34559071 DOI: 10.2166/wst.2021.313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Porous graphitic carbon nitride (p-C3N4) was fabricated via simple pyrolyzing treatment of graphitic carbon nitride (g-C3N4). The defects could be introduced into the structure of g-C3N4 by breakage of some bonds, which was beneficial for the generation of electron-hole pairs and inhibiting their recombination. Compared with g-C3N4, p-C3N4 showed a narrow band gap to promote the utilization of visible light. Furthermore, the porous structure also increased the specific surface area to maximize the exposure of active sites and promote mass transfer during photodegradation. As a result, the as-reported p-C3N4 exhibited considerably higher degradation efficiency for Rhodamine B (RhB) and Methyl Orange (MO) than that of the original g-C3N4. Moreover, the photocatalyst showed high durability and stability in recycling experiments.
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Affiliation(s)
- Jing Chen
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail: ; These authors contributed equally to this work
| | - Yage Zhang
- Department of Science and Technology, Northwest University, Xi'an 710069, China; These authors contributed equally to this work
| | - Baofan Wu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
| | - Zhichao Ning
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
| | - Miaoyan Song
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
| | - Haifeng Zhang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
| | - Xuzhuo Sun
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Bo Li
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China E-mail:
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Chen J, Zhao Z, Feng Y, Sun X, Li B, Wan D, Tan Y. A new strategy for improving the electrochemical performance of perovskite cathodes: pre-calcining the perovskite oxide precursor in a nitrogen atmosphere. Nanoscale Adv 2021; 3:5027-5035. [PMID: 36132338 PMCID: PMC9416970 DOI: 10.1039/d1na00031d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 06/28/2021] [Indexed: 06/15/2023]
Abstract
Increasing the concentration of oxygen deficiency in perovskite oxides by suitable cation doping or anion doping can significantly increase the cathode ionic conductivity, thus improving the oxygen reduction reaction activity in solid oxide fuel cells (SOFCs). Herein, pre-calcining the perovskite oxide precursor in N2 atmosphere is a new strategy to further improve the oxygen non-stoichiometry (δ) and electrocatalytic activity of the cathode. The obtained nitrogen-treated Sm0.5Sr0.5CoO3-δ (SSC) powder has higher oxygen non-stoichiometry than the untreated one. The δ value is 0.27 for SSC-400 at 800 °C in air. The obtained nitrogen-treated SSC-400 cathodes calcined at 1000 °C show improved electrochemical performance compared to SSC-air, achieving the polarization resistance (R p) values to be 0.035, 0.078 and 0.214 Ω cm2 at 700 °C, 650 °C and 600 °C. The maximum power density of the cell with the SSC-600 cathode reaches 0.87, 1.16 and 1.24 W cm-2 at 600, 650 and 700 °C, which are more excellent than SSC-air. Pre-calcining the perovskite oxide precursor in N2 at a suitable temperature can remarkably improve the electrochemical capability of the cathode and provide a convenient and useful strategy to alleviate the problem of oxygen deficiency in perovskite oxides.
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Affiliation(s)
- Jing Chen
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Zhenxiang Zhao
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Yu Feng
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Xuzhuo Sun
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Bo Li
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology Zhengzhou 450001 China
| | - Yuan Tan
- The Key Laboratory of Optoelectronic Chemical Materials and Devices, School of Chemical and Environmental Engineering, Jianghan University Wuhan 430056 China
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Wan D, Chen Y, Shi Y, Liu Y, Xiao S. Effective adsorption of bisphenol A from aqueous solution over a novel mesoporous carbonized material based on spent bleaching earth. Environ Sci Pollut Res Int 2021; 28:40035-40048. [PMID: 33770357 DOI: 10.1007/s11356-021-13596-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
In this study, the novel mesoporous carbonized material (HSBE/C) was prepared from clay/carbon composite (SBE/C) treated with hydrofluoric acid (HF) for the first time, and was employed to efficiently adsorb bisphenol A (BPA) in water. Specifically, SBE/C was derived from the pyrolysis of spent bleaching earth (SBE), an industrial waste. HF removed SiO2 from SBE/C and increased the specific surface area of HSBE/C (from 100.21 to 183.56 m2/g), greatly providing more adsorption sites for enhanced BPA adsorption capacity. The Langmuir monolayer maximum adsorption capacity of HSBE/C (103.32 mg/g) was much higher than the commercial activated carbon (AC) (42.53 mg/g). The adsorption process by HSBE/C followed well with the Freundlich isotherm model and the pseudo-second-order kinetic model and also was endothermic (ΔH0 > 0) and spontaneous (ΔG0 < 0). Based on the systematic characterization and factor experiment (temperature, dosage, initial pH, co-existing ions), BPA adsorption mechanism by HSBE/C likely included the hydrogen bonding, electrostatic interaction, and hydrophobic interaction. Moreover, there was no secondary pollution during the total adsorption process. Extraordinary, HSBE/C manifested stability by NaOH desorption regeneration. This study provides a new sight for application of waste-based materials as the promising adsorbents in the treatment of endocrine disruptors.
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Affiliation(s)
- Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yao Chen
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
- Zhengzhou Sewage Purification Co. LTD, Zhengzhou, 450051, Henan, China
| | - Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China.
| | - Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
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Liu Y, Liu Y, Shi Y, He Q, Li Q, Wan D, Zhou J. Using a sulfur autotrophic fluidized bed reactor for simultaneous perchlorate and nitrate removal from water: S disproportionation prediction and system optimization. Biodegradation 2021; 32:627-642. [PMID: 34318374 DOI: 10.1007/s10532-021-09957-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/21/2021] [Indexed: 11/26/2022]
Abstract
The sulfur autotrophic reduction (SAR) process is promising in co-reduction of perchlorate and nitrate from aqueous solution. To further understand the reaction process, we developed a sulfur autotrophic fluidized bed reactor where the proceeding extent of sulfur (S) disproportionation was predicted by Response surface methodology (RSM) for the first time. Three fundamental reaction parameters including the hydraulic retention time (HRT), co-existing nitrate concentration ([Formula: see text]) and recirculation ratio (R) were considered for reactor optimization. The results demonstrated that S disproportionation was promoted by long HRT and high R, whereas was inhibited by high [Formula: see text]. Also, the optimal HRT, [Formula: see text] and R were 0.50 h, 10.00 mg/L and 14, respectively, the bioreactor can achieve high reduction efficiency of perchlorate and nitrate (> 98.45%), and generate less sulfate (236.07 mg/L). High-throughput sequencing showed that Chlorobaculum was related to S disproportionation, and Sulfurovum was associated with nitrate/perchlorate reducing. All results indicate that the sulfur autotrophic fluidized bed reactor is a promising candidate for the treatment of perchlorate and nitrate wastewater in future practical applications.
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Affiliation(s)
- Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yang Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Qi Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China.
| | - Jia Zhou
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
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Liu Y, Li J, Wu L, Wan D, Shi Y, He Q, Chen J. Synergetic adsorption and Fenton-like degradation of tetracycline hydrochloride by magnetic spent bleaching earth carbon: Insights into performance and reaction mechanism. Sci Total Environ 2021; 761:143956. [PMID: 33352346 DOI: 10.1016/j.scitotenv.2020.143956] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/13/2020] [Accepted: 11/13/2020] [Indexed: 06/12/2023]
Abstract
In this study, the synergetic adsorption and Fenton-like degradation of tetracycline hydrochloride (TCH) by magnetic spent bleaching earth carbon (Mag-SBE@C) with H2O2 were developed and performed, with 91.5% of TCH degradation efficiency and 42.1% of TOC removal efficiency. The effects of the reaction parameters (temperature, initial pH, catalyst dosage, molar ratio of TCH to H2O2) on TCH degradation in Mag-SBE@C/H2O2 system were studied. Under the optimal conditions (temperature 41.1 °C, initial pH 4.89 and molar ratio of H2O2 to TCH 114.435) forecasted by response surface methodology (RSM), high TCH degradation efficiency (99%) was achieved. Also, four cycling tests were performed to confirm the excellent stability and regeneration ability of Mag-SBE@C in presence of H2O2. In addition, the characteristics of Mag-SBE@C after reaction are analyzed in details via scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Brunner-Emmet-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrum (FTIR) and X-ray diffraction (XRD), and it was found that Fe3O4 nanoparticles on Mag-SBE@C surface acted as co-catalyst and participated in degradation and improved reaction efficiency, while its properties were not greatly changed. The quenching experiments showed that hydroxyl radicals on Mag-SBE@C surface (OHadsorption) were dominant in Mag-SBE@C/H2O2 system. Meanwhile, three possible TCH degradation pathways were given based on the possible intermediates determined by liquid chromatography quadrupole-time-of-flight mass spectrometry (LC-Q-TOF-MS/MS). Mag-SBE@C is an excellent heterogeneous Fenton-like catalyst, exhibiting greatly potential to antibiotics elimination.
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Affiliation(s)
- Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China.
| | - Jinsong Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Lairong Wu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China.
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China
| | - Jing Chen
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China
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Liu Y, Chen Y, Shi Y, Wan D, Chen J, Xiao S. Adsorption of toxic dye Eosin Y from aqueous solution by clay/carbon composite derived from spent bleaching earth. Water Environ Res 2021; 93:159-169. [PMID: 32564442 DOI: 10.1002/wer.1376] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
The environmentally friendly clay/carbon composite (SBE/C) was prepared by one-step pyrolysis under N2 atmosphere at 700°C of spent bleaching earth (SBE) from the industrial waste of the refined oil industry. SBE/C was tested to remove anionic dye Eosin Y from aqueous water. The results revealed that SBE/C had larger specific surface area than SBE, and the equilibrium adsorption capacity of SBE/C (11.15 mg/g) was about 3 times than that of SBE (4.04 mg/g). The adsorption process was found to be exothermic and spontaneous. The adsorption capacity of SBE/C was independent on pH (5-12), and exhibits satisfactorily recyclable performance. Combined with characterization analysis, the adsorption mechanism likely includes electrostatic interaction, hydrogen bonding, hydrophobic interaction, halogen bonding, and π-π interaction. Overall, this exploration of SBE/C might open a window to the design of an efficient and low-cost adsorbent for Eosin Y dye elimination from wastewater. PRACTITIONER POINTS: The resource utilization of industrial waste SBE was achieved. SBE/C was synthesized and tested to adsorb Eosin Y for the first time. SBE/C had characteristics with porous structure and large surface area. pH had little effect on adsorption capacity of SBE/C for Eosin Y. SBE/C exhibited potential for dye elimination from wastewater.
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Affiliation(s)
- Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, China
- Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, China
| | - Yao Chen
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, China
| | - Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, China
- Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, China
| | - Jing Chen
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, China
- Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China
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Shi Y, Li J, Wan D, Huang J, Liu Y. Peroxymonosulfate-enhanced photocatalysis by carbonyl-modified g-C 3N 4 for effective degradation of the tetracycline hydrochloride. Sci Total Environ 2020; 749:142313. [PMID: 33370880 DOI: 10.1016/j.scitotenv.2020.142313] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/15/2020] [Accepted: 09/07/2020] [Indexed: 06/12/2023]
Abstract
In this work, carbonyl-modified g-C3N4 (CO-C3N4) is prepared through one-step calcination of the melamine-oxalic acid aggregates. The visible light-assisted photocatalytic degradation efficiency of the tetracycline hydrochloride (TCH) for CO-C3N4 is significantly enhanced by introducing the peroxymonosulfate (PMS), and the apparent rate constant is greatly increased from 0.01966 min-1 in CO-C3N4/vis system to 0.07688 min-1 in CO-C3N4/PMS/vis system. It is found that carbonyl for CO-C3N4 might offer possible reactive sites for PMS activation and collection sites of photo-generated electrons, greatly accelerating carrier's separation for PMS activation. The favorable conditions, such as the higher catalyst dosage, higher PMS amount and alkaline pH, contribute to TCH degradation. The deleterious effects of co-existing anions on the TCH degradation efficiency are ranked in a decline: H2PO4- > SO42- > HCO3- > NO3- > Cl-, and it may be affected by the type and amounts of anions and active radicals generated. The radical trapping tests and electron spin resonance (ESR) detection display that the O2-, h+, 1O2, OH and SO4- all contribute to TCH degradation. Meanwhile, possible degradation mechanism, intermediates and degradation pathway of TCH are revealed in CO-C3N4/PMS/vis system. This study will offer a new insight for constructing PMS activation with carbonyl modified g-C3N4 photocatalysis system to achieve effective treatment of organic wastewater.
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Affiliation(s)
- Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Jinsong Li
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
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Huang DJ, Li Y, Yang ZX, Sun YN, Wan D. Association of the TLR4-MyD88-JNK signaling pathway with inflammatory response in intracranial hemorrhage rats and its effect on neuronal apoptosis. Eur Rev Med Pharmacol Sci 2020; 23:4882-4889. [PMID: 31210322 DOI: 10.26355/eurrev_201906_18076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To investigate the association of Toll-like receptor 4-myeloid differential protein-88- c-Jun N-terminal kinase (TLR4-MyD88-JNK) signaling pathway with inflammatory response in intracranial hemorrhage (ICH) rats and its effect on neuronal apoptosis. PATIENTS AND METHODS The autologous blood was drawn and injected into the brain to establish the rat model of ICH (model group), and the control group was set up. The neurological behavior Longa score was given. The blood and brain tissues of rats were then collected to detect the serum indexes, including glucose (GLU), creatinine (CR), K+ and Na+, and the content of interleukin-6 (IL-6), IL-1β and tumor necrosis factor-α (TNF-α) in each group. The neuronal apoptosis of brain tissues was detected via terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. Moreover, the expressions of apoptosis- and TLR4-MyD88-JNK pathway-related genes and proteins were detected via Reverse Transcription-Polymerase Chain Reaction (RT-PCR) and Western blotting. Finally, the association of TLR4-MyD88-JNK signaling pathway with the inflammatory response in ICH rats and its effect on neuronal apoptosis were completely observed. RESULTS MiR-23b was dramatically down-regulated in CC and the low miR-23b expressions were associated with the poor prognosis and worse OS of CC patients. Additionally, the functional assays demonstrated that miR-23b overexpression obviously repressed CC cell proliferation, invasion and migration abilities through the regulation of the AKT/mTOR pathway and the epithelial-to-mesenchymal transition (EMT) progress. Moreover, the luciferase reporter assay indicated that six1 was one functional target for miR-23b in CC cells, indicating that the inhibitory functions of miR-23b in CC cells were partially regulated by six1. Moreover, miR-23b restoration could prominently repress tumor growth in vivo. CONCLUSIONS The TLR4-MyD88-JNK signaling pathway can facilitate the inflammatory response in ICH rats, thereby promoting the neuronal apoptosis.
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Affiliation(s)
- D-J Huang
- Department of Neurosurgery and Neurointerventional, General Hospital of Ningxia Medical University, Yinchuan, China.
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Shi Y, Wan D, Huang J, Liu Y, Li J. Stable LBL self-assembly coating porous membrane with 3D heterostructure for enhanced water treatment under visible light irradiation. Chemosphere 2020; 252:126581. [PMID: 32222517 DOI: 10.1016/j.chemosphere.2020.126581] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 06/10/2023]
Abstract
The development of visible light-responsive photocatalytic membranes (vis-PMs) has opened a promising direction in water purification field. Herein, supramolecular aggregates from cyanuric acid (C), melamine (M), and urea (U) in dimethyl sulfoxide (DMSO) were used to prepare the porous carbon nitride nanosheet (MCU-C3N4) with excellent photocatalytic performance. A sort of 3D heterostructure PMs consisting of MCU-C3N4 and carbon nanotube (CNTs) interposed into graphene oxide (GO) on the PVDF membrane was firstly fabricated by the layer-by-layer (LbL) assembly method, in which CNTs/MCU-C3N4/GO material was immobilized on the polyelectrolytes (PE) modified PVDF based on their electrostatic attractions. Such PMs with abundant nano-channels had excellent mechanical strength, satisfactory water permeability (14.35 L m-2 h-1 bar-1) and synergetic removal efficiency of rhodamine B (RhB, 98.31%) in long -term operation, relative to the pristine GO membrane and MCU-C3N4/GO membrane fabricated by the same method. In addition, such PMs also exhibited the satisfactory tetracycline hydrochloride (TC) removal rate (84.81%) under visible light irradiation. Construction and performance of such carbon-based PMs might provide guidance for development of vis-PMs in terms of bonding strength, multidimensional morphology and water purification application.
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Affiliation(s)
- Yahui Shi
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan, 450001, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan, 450001, China.
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan, 410082, China.
| | - Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan, 450001, China
| | - Jinsong Li
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
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Liu Y, Ding L, Wang B, He Q, Wan D. Using the modified pine wood as a novel recyclable bulking agent for sewage sludge composting: Effect on nitrogen conversion and microbial community structures. Bioresour Technol 2020; 309:123357. [PMID: 32305845 DOI: 10.1016/j.biortech.2020.123357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the effect of a recoverable sulphuric acid and sodium hydroxide-modified pinewood (MOP) as a bulking agent during sewage sludge and sawdust composting (MOPC), with a control experiment using unpretreated pinewood (UNP; UNPC) as the bulking agent. Results show that addition of MOP effectively promoted the degradation of organic matter during composting. The maximum temperature increased by 1.50 °C and the high temperature period (T > 50 °C) of composting was extended 4 days longer than the control experiment. Furthermore, MOP addition reduced the loss of nitrogen by 9.40%. High-throughput sequencing analysis showed that the bacterial communities in the UNPC and MOPC treatments were significantly different. Pseudoxanthomonas was the dominant bacteria during the thermophilic and cooling phases of the MOPC treatment. In addition, the recycling efficiency of the UNP and MOP was 99.18% and 99.37%, respectively.
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Affiliation(s)
- Yongde Liu
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan 450001, China.
| | - Leibo Ding
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Binbin Wang
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Qiaochong He
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan 450001, China
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Liu Y, Li J, Wu L, Shi Y, He Q, Chen J, Wan D. Magnetic spent bleaching earth carbon (Mag-SBE@C) for efficient adsorption of tetracycline hydrochloride: Response surface methodology for optimization and mechanism of action. Sci Total Environ 2020; 722:137817. [PMID: 32208249 DOI: 10.1016/j.scitotenv.2020.137817] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/18/2020] [Accepted: 03/07/2020] [Indexed: 05/13/2023]
Abstract
The utilization of spent bleaching earth (SBE)-based materials for adsorption of pollutants from water and wastewater has received growing attention. In this work, a comparative study of magnetic spent bleaching earth carbon (Mag-SBE@C) and spent bleaching earth carbon (SBE@C) was performed to remove tetracycline hydrochloride (TCH) from aqueous solutions. Mag-SBE@C exhibits the larger adsorption capacity (0.238 mmol/g) obtained by the Langmuir model than the original SBE@C (0.150 mmol/g). The adsorption process fits well with the pseudo second-order model and is found to be exothermic (ΔH0 < 0) and spontaneous (ΔG0 < 0). The optimal adsorption conditions (Mag-SBE@C dose 2.217 g/L, initial TCH concentration 0.113 mmol/L, initial solution pH 6.533) predicted by the response surface methodology (RSM) are consistent with the actual verification results. The inhibition extents of coexisting cations are ranked in a decline: Al3+ > Cu2+ > Fe3+ > Mg2+ > K+ > Na+. Various characterization results indicate that the adsorption mechanism of TCH by Mag-SBE@C likely includes the π-π interactions, hydrogen bonding, electrostatic interactions, π-cations interactions, FeN covalent bonding, and changes in physical and chemical properties. Mag-SBE@C is easily solid-liquid separated using magnetic field, and can be potentially reused for 13 times before completely losing its activity, exhibiting great potential to antibiotics elimination.
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Affiliation(s)
- Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China.
| | - Jinsong Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Lairong Wu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China
| | - Jing Chen
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Academician Workstation of Combined Pollution Control and Research, Zhengzhou, Henan 450001, China.
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25
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Xu Z, Chen X, Li H, Wan D, Wan J. Combined heterotrophic and autotrophic system for advanced denitrification of municipal secondary effluent in full-scale plant and bacterial community analysis. Sci Total Environ 2020; 717:136981. [PMID: 32092802 DOI: 10.1016/j.scitotenv.2020.136981] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 01/15/2020] [Accepted: 01/26/2020] [Indexed: 06/10/2023]
Abstract
Total nitrogen (TN) removal is the major technical challenge for wastewater treatment plants to meet the more stringent discharge standard. In this study, lab- (0.05 m3/d), pilot- (1000 m3/d) and full-scale (10,000 m3/d) combined heterotrophic and autotrophic denitrification reactors (HARs) were designed and operated to treat municipal secondary effluent. During the 110-day stable operation, the effluent TN was reduced below 2.5 mg/L without secondary pollution causing by the excessive addition of organics, close to Class IV of Environmental Quality Standards for Surface Water. The bacterial richness and diversity increased with the expansion of reactor scale. Denitrifying bacteria (DB) dominated in all reactors, however, Thiomonas (12.42%), Methylotenera (6.35%), Thiobacillus (20.62%), Methyloverstatilis (5.44%) and Thauera (8.21%) were the main genera in lab-, pilot- and full-scale reactors respectively. The denitrification efficiency temporarily deteriorated at the later stage, and redundancy analysis (RDA) indicated the obviously increased sulfate reducing bacteria (SRB) and sulfide were main contributors. Sludge supplement rapidly recovered the reactors performance in five days. This study suggests that HARs could be a promising technique for advanced denitrification of the municipal secondary effluent.
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Affiliation(s)
- Zicong Xu
- College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China; ZhiHe Environmental Science and Technology Co., Ltd., Zhengzhou 450001, China
| | - Xiaolei Chen
- ZhiHe Environmental Science and Technology Co., Ltd., Zhengzhou 450001, China
| | - Haisong Li
- College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China.
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Junfeng Wan
- College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
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Lin P, Liu WK, Li X, Wan D, Qin H, Li Q, Chen G, He Y, Yang H. MRI-based radiogenomics analysis for predicting genetic alterations in oncogenic signalling pathways in invasive breast carcinoma. Clin Radiol 2020; 75:561.e1-561.e11. [PMID: 32183997 DOI: 10.1016/j.crad.2020.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/18/2020] [Indexed: 01/23/2023]
Abstract
AIM To investigate the effect of radiomics in the assessment of alterations in canonical cancer pathways in breast cancer. MATERIALS AND METHODS Eighty-eight biopsy-proven breast cancer cases were included in the present study. Radiomics features were extracted from T1-weighted sagittal dynamic contrast-enhanced magnetic resonance imaging (MRI) images. Radiomics signatures were developed to predict genetic alterations in the cell cycle, Myc, PI3K, RTK/RAS, and p53 signalling pathways by using hypothesis testing combined with least absolute shrinkage and selection operator (LASSO) regression analysis. The predictive powers of the models were examined by the area under the curve (AUC) of the receiver operating characteristic curve. RESULTS A total of 5,234 radiomics features were obtained from MRI images based on the tumour region of interest. Hypothesis tests screened 250, 229, 156, 785, and 319 radiomics features that were differentially displayed between cell cycle, Myc, PI3K, RTK/RAS, and p53 alterations and no alteration status. According to the LASSO algorithm, 11, 12, 12, 15, and 13 features were identified for the construction of the radiomics signatures to predict cell cycle, Myc, PI3K, RTK/RAS, and p53 alterations, with AUC values of 0.933, 0.926, 0.956, 0.940, and 0.886, respectively. The cell cycle radiomics score correlated closely with the RTK/RAS and p53 radiomics scores. These signatures were also dysregulated in patients with different oestrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 statuses. CONCLUSION MRI-based radiogenomics analysis exhibits excellent performance in predicting genetic pathways alterations, thus providing a novel approach for non-invasively obtaining genetic-level molecular characteristics of tumours.
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Affiliation(s)
- P Lin
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - W K Liu
- Department of Ultrasound, Affiliated Union Hospital of Fujian Medical University, Fuzhou, Fu Jian 350000, China
| | - X Li
- GE Healthcare, Shanghai, China
| | - D Wan
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - H Qin
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - Q Li
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - G Chen
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - Y He
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China
| | - H Yang
- Department of Ultrasound, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, China.
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Li Y, Wang Y, Wan D, Li B, Zhang P, Wang H. Pilot-scale application of sulfur-limestone autotrophic denitrification biofilter for municipal tailwater treatment: Performance and microbial community structure. Bioresour Technol 2020; 300:122682. [PMID: 31901555 DOI: 10.1016/j.biortech.2019.122682] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/20/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
This work aimed to study a pilot-scale sulfur-limestone autotrophic denitrification biofilter (SLADB) to remove nitrogen from municipal tailwater. The capacity of nitrogen removal and spatial distribution of microbial community at low temperature condition were analyzed. Low temperature inhibits nitrogen removal; while prolonging hydraulic retention time (HRT) increased nitrogen removal efficiency. TN and NO3--N removal efficiency reached 81.1% and 85.3%, respectively, with HRT of 18 h at the temperature ranging from 6.4 to 9.8 °C. Proteobacteria and Chloroflexi were two dominant phyla. Along the reactor, class β-proteobacteria and ε-proteobacteria decreased, while γ-proteobacteria and Acidobacteria increased. For genus classification, Thiobacillus, Sulfurimonas, and Ferritrophicum which promote sulfur autotrophic denitrification, decreased significantly. While Anaerolineae promoting heterotrophic denitrification increased obviously. Sphingobacteriia coexisted in SLADB and were beneficial to nitrogen removal. Microbial community spatial distribution patterns were related to nitrogen removal. This study achieved reliable pilot-scale application of SLADB under low temperature for municipal tailwater.
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Affiliation(s)
- Yingying Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China
| | - Yali Wang
- Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Bang Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Panyue Zhang
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Hongjie Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China.
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28
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Wan D, Li Q, Liu Y, Xiao S, Wang H. Simultaneous reduction of perchlorate and nitrate in a combined heterotrophic-sulfur-autotrophic system: Secondary pollution control, pH balance and microbial community analysis. Water Res 2019; 165:115004. [PMID: 31470280 DOI: 10.1016/j.watres.2019.115004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 08/17/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
A combined heterotrophic-sulfur-autotrophic system (CHSAS) was established to simultaneously reduce perchlorate and nitrate in water. In this system, the OH- produced by the acetate heterotrophic part (H-part) could be neutralized with the H+ produced by the sulfur autotrophic part (S-part); thus, the pH of the final effluent could keep neutral. In addition, the S-part could further reduce the pollutants and residual carbon from the H-part to achieve a high performance. For 19.62 ± 0.30 mg/L ClO4- and 21.56 ± 0.83 mg/L NO3--N in the influent, the operating parameters were optimal at a hydraulic retention time (HRT) of 1.0 h and an acetate concentration of 70 mg/L. The removal efficiency of ClO4- and NO3- reached 95.43% and 99.23%, without secondary pollution caused by residual organic carbon. It was also revealed that sulfur (S0) disproportionation can be inhibited by shortening the HRT and reducing the acetate dosage. The dominant heterotrophic and autotrophic bacteria were Thauera and Ferritrophicum, respectively, while Chlorobaculum was related to S0 disproportionation.
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Affiliation(s)
- Dongjin Wan
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Qi Li
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yongde Liu
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Hongjie Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
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29
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Steinberg C, Cheung C, Wan D, Staples J, Philippon F, Laksman Z, Sarrazin J, Bennett M, Plourde B, Deyell M, Andrade J, Roy K, Yeung-Lai-Wah J, Molin F, Hawkins N, Blier L, Nault I, O'Hara G, Krahn A, Champagne J, Chakrabarti S. DRIVING RESTRICTIONS AND EARLY ARRHYTHMIAS IN PATIENTS RECEIVING A PRIMARY PREVENTION IMPLANTABLE CARDIOVERTER-DEFIBRILLATOR (DREAM-ICD STUDY). Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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30
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Kwan J, Wan D, Grewal J, Barlow A, Kiess M, Human D, Riahi M, Chakrabarti S. ARRHYTHMIC AND THROMBOEMBOLIC OUTCOMES IN ADULTS WITH COARCTATION OF THE AORTA. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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31
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Wan D, Halim A, Ho L, Lu T, Lim K. MYOCARDIAL CYTOSKELETAL DYSFUNCTION IN KIDNEY FAILURE: THE CAIN STUDY. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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32
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Zhang R, Wu XJ, Wan D, Lin J, Ding P, Lei J, Lu Z, Li L, Chen G, Kong L, Wang F, Zhang D, Fan W, Jiang W, Zhou W, Li C, Li Y, Li X, Pan Z. Intraoperative chemotherapy with 5-FU for colorectal cancer patients receiving curative resection (IOCCRC): A randomized, multicenter, prospective, phase III trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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33
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Wan D, Amon J, Nazzari H, Chua D, Grewal J, Barlow A, Kiess M, Human D, Riahi M, Toma M, Ignaszewski A, Chakrabarti S. SACUBUTRIL/VALSARTAN IS SAFE AND EFFECTIVE IN REDUCING HEART FAILURE SYMPTOMS IN ADULTS WITH CONGENITAL HEART DISEASE. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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34
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Wan D, Li Q, Chen J, Niu Z, Liu Y, Li H, Xiao S. Simultaneous bio-electrochemical reduction of perchlorate and electro-disinfection in a novel Moving-Bed Biofilm Reactor (MBBR) based on proton-exchange membrane electrolysis. Sci Total Environ 2019; 679:288-297. [PMID: 31085409 DOI: 10.1016/j.scitotenv.2019.04.441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
A novel Moving-Bed Biofilm Reactor (MBBR), based on proton-exchange membrane electrolysis, was developed and tested for perchlorate transformation. The bacteria growing on the carrier in the cathode chamber could use in situ-generated hydrogen to reduce perchlorate to chloride via electrolysis; the resulting chloride ions and chloride ions in raw water were then oxidized into chlorine by anode reaction to disinfect the final effluent and improve water quality. For a ClO4- concentration of 10.00 ± 0.08 mg/L in the influent, at hydraulic retention times (HRTs) of 4.0, 2.0, and 1.5 h, the optimal applied currents (OACs) were 130, 240, and 270 mA, with a corresponding removal efficiencies of 99.90 ± 0.21, 96.70 ± 0.36, and 78.50 ± 0.24%, respectively. Active chlorine concentration was in the range of 0.063-0.096 mg/L, contributing to simultaneous electro-disinfection. Along the water flow direction, OH- generated by the cathode could be neutralized in the anode chamber; thus, the final effluent pH was kept a balance with the influent pH. Proteobacteria, Bacteroidetes, and Firmicutes were the dominant bacteria in the MBBR. The maximum value of current efficiency (13.32 ± 0.69%) was obtained at 100 mA and an HRT of 4.0 h, which was in accordance with the abundance of Thauera.
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Affiliation(s)
- Dongjin Wan
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Qi Li
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Jing Chen
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Zhenhua Niu
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yongde Liu
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Haisong Li
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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35
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Wan D, Wu L, Liu Y, Chen J, Zhao H, Xiao S. Enhanced Adsorption of Aqueous Tetracycline Hydrochloride on Renewable Porous Clay-Carbon Adsorbent Derived from Spent Bleaching Earth via Pyrolysis. Langmuir 2019; 35:3925-3936. [PMID: 30808173 DOI: 10.1021/acs.langmuir.8b04179] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, spent bleaching earth (SBE) and pyrolyzed SBE (SBE@C) were tested for their capacity to remove tetracycline hydrochloride (TCH) from aqueous solution. The maximum adsorption capacity obtained by the Langmuir model is 0.114 mmol/g for SBE@C and 0.087 mmol/g for SBE. The deleterious effects of coexisting cations were ranked in a decline: Al3+ > Mg2+ > Na+. The results of various characterization methods show that the adsorption mechanisms mainly included π-π interactions, hydrogen bonding, electrostatic interactions, and changes in physical and chemical properties. After 3 repeated cycles of pyrolysis, the adsorption capacity of SBE@C remained at 85.4%, with SBE@C potentially recycled 21 times before complete loss of adsorption capacity. Furthermore, the problem of secondary pollution caused by SBE and residual oil is resolved by the use of SBE@C. All results indicate that SBE@C is a likely candidate for the treatment of TCH wastewater in the coming practical applications.
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Affiliation(s)
- Dongjin Wan
- College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Lairong Wu
- College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Yongde Liu
- College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Jing Chen
- College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Hailiang Zhao
- College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China
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36
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Wan D, Liu Y, Wang Y, Li Q, Jin J, Xiao S. Sulfur disproportionation tendencies in a sulfur packed bed reactor for perchlorate bio-autotrophic reduction at different temperatures and spatial distribution of microbial communities. Chemosphere 2019; 215:40-49. [PMID: 30312915 DOI: 10.1016/j.chemosphere.2018.10.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 08/20/2018] [Accepted: 10/02/2018] [Indexed: 06/08/2023]
Abstract
This study investigates the sulfur (S) disproportionation tendencies in a sulfur packed bed reactor for perchlorate bio-autotrophic reduction at different temperatures. The reactor was operated with over 99% efficiency for 21.00 ± 1.40 mg L-1 perchlorate removal when the hydraulic retention time (HRT) ranged from 12.00 h to 0.75 h at 27 ± 2 °C. When HRT was controlled at 1.00 h, the perchlorate removal efficiency was only 8 ± 1% as the temperature dropped to 6 ± 1 °C. The half-order model fit both perchlorate removal and S disproportionation reaction well. Compared with S disproportionation, the decrease of temperature had a greater influence on perchlorate reduction. As the temperature dropped from 27 ± 2 °C to 6 ± 1 °C, the 1/2K1/2v,R for perchlorate reduction decreased from 7.37 mg1/2 L-1/2 h-1 to 0.19 mg1/2 L-1/2 h-1. Meanwhile, the 1/2K1/2v,S for S disproportionation decreased from 3.04 mg1/2 L-1/2 h-1 to 1.96 mg1/2 L-1/2 h-1. The reaction activation energy of perchlorate reduction and S disproportionation was 120.28 kJ mol-1 and 13.44 kJ mol-1, respectively. The S disproportionation reaction proceeded remarkably at the beginning of the reduction, a longer HRT and higher temperature promoted S disproportionation, resulting in excessive sulfate generation and alkalinity consumption. Besides, the spatial distribution of the microbial communities and the dominant bacteria function under different HRTs was analyzed using high-throughput sequencing.
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Affiliation(s)
- Dongjin Wan
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yongde Liu
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yiyi Wang
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Qi Li
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Jingnan Jin
- School of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
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Besant G, Blakely C, Wan D, Redfearn D, Simpson C, Glover B, Abdollah H, Hopman W, Baranchuk A. SUSPICIOUS INDEX IN LYME CARDITIS (SILC) SCORE. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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38
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Wan D, Wu L, Liu Y, Zhao H, Fu J, Xiao S. Adsorption of low concentration perchlorate from aqueous solution onto modified cow dung biochar: Effective utilization of cow dung, an agricultural waste. Sci Total Environ 2018; 636:1396-1407. [PMID: 29913600 DOI: 10.1016/j.scitotenv.2018.04.431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/08/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
In this study, cow dung biochar (CDB) and ferric chloride-modified CDB (Fe@CDB) were synthesized to remove low concentration perchlorate from water. The pseudo-second-order kinetics model was used and satisfactorily described perchlorate removal onto CDB and Fe@CDB. The Langmuir model fit the experimental isotherm data better than the Freundlich model. The maximum adsorption capacity obtained using the Langmuir model was 1787 μg/g for Fe@CDB and 304 μg/g for CDB. The detrimental effects of coexisting anions decreased as: NO3- > SO42- > Cl-. FeCl3 modification enhanced ion exchange, and this was the main mechanism rather than electrostatic interactions. Also, after modification, the surface area, pore volume, and pore size increased and promoted adsorption. The surface hydrophilicity increased and so did the amounts of the surface oxygenated functional groups OH and COOH, which were responsible for perchlorate adsorption. The materials were further characterized using Brunner-Emmet-Teller (BET) measurements, Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), Scanning Electron Microscopy (SEM), Elemental analysis, X-ray photoelectron spectroscopy (XPS), Boehm titration, Zeta potential and Fourier transform infrared spectroscopy (FTIR).
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Affiliation(s)
- Dongjin Wan
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Lairong Wu
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Yongde Liu
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
| | - Hailiang Zhao
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Jun Fu
- Sino-Japan Friendship Centre for Environmental Protection, Beijing 100029, China.
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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39
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Sheng X, Jiang X, Zhao H, Wan D, Liu Y, Ngwenya CA, Du L. FTIR study of hydrogen bonding interaction between fluorinated alcohol and unsaturated esters. Spectrochim Acta A Mol Biomol Spectrosc 2018; 198:239-247. [PMID: 29549865 DOI: 10.1016/j.saa.2018.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 02/25/2018] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
The 1:1 complexes of two unsaturated esters with 2,2,2-trifluoroethanol (TFE) were investigated experimentally and computationally. The experimental observations of the spectral shifts of the OH-stretching vibrational transitions were obtained at 113cm-1 for TFE-methyl acrylate (MA) and 92cm-1 for TFE-vinyl acetate (VA). There are three docking sites in the two unsaturated esters for the incoming TFE. The predicted red shifts of the OH-stretching vibrational transitions were found to be larger for the OH⋯OC hydrogen bonded conformer than those for the OH⋯π and OH⋯O ones. The binding energies further prove that the OH⋯OC hydrogen bonded conformers are the most stable ones. On the basis of the DFT calculations as well as previous works, the carbonyl group is the best docking site for TFE. Furthermore, the thermodynamic equilibrium constants of TFE-MA and TFE-VA were obtained at 0.28 and 0.15 by combining the experimental spectra data and the DFT calculations. Consequently, the Gibbs free energies of formation were determined to be 3.2 and 4.8kJmol-1 for TFE-MA and TFE-VA, respectively. The quantum theory of atoms in molecules (AIM) and generalized Kohn-Sham energy decomposition analysis (GKS-EDA) were carried out for further characterization of the hydrogen bonding interactions. GKS-EDA shows an "electrostatic" dominated hydrogen bonding character for the OH⋯OC hydrogen bonds.
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Affiliation(s)
- Xia Sheng
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China
| | - Xiaotong Jiang
- Environment Research Institute, Shandong University, Shanda South Road 27, 250100 Jinan, China
| | - Hailiang Zhao
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China; Environment Research Institute, Shandong University, Shanda South Road 27, 250100 Jinan, China
| | - Dongjin Wan
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China
| | - Yongde Liu
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China
| | - Cleopatra Ashley Ngwenya
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China
| | - Lin Du
- Environment Research Institute, Shandong University, Shanda South Road 27, 250100 Jinan, China.
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Chen J, Wan D, Sun X, Li B. Interpretation of an inductive loop in the impedance of the impregnated La0.6Sr0.4Co0.2Fe0.8O3-δ-Y2O3 stabilized ZrO2 cathodes. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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41
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Zhou J, Li H, Chen X, Wan D, Mai W, Sun C. Cometabolic degradation of low-strength coking wastewater and the bacterial community revealed by high-throughput sequencing. Bioresour Technol 2017; 245:379-385. [PMID: 28898834 DOI: 10.1016/j.biortech.2017.08.119] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/14/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
Cometabolism technology was employed to degrade low-strength coking wastewater (CWW) in Sequencing Batch Reactor (SBR). The bacterial community compositions were monitored by high-throughput sequencing. Cometabolic substrate effectively improved the chemical oxygen demand (COD) removal efficiency in glucose-added system (A1) compared to glucose-free system (A0). Meanwhile, A1 exhibited larger biomass, better settlement performance, and higher dehydrogenase activity (DHA). More importantly, high-throughput sequencing revealed that dominant populations in A1 were quite different with A0. Thauera (9.27%), Thermogutta (7.58%), and Defluviimonas (4.6%) began to enrich in A1 after cometabolic substrate supplement. Especially, Thauera, as the most dominant populations in Al, could degrade a wide spectrum of aromatic compounds, which may contribute to the better system performance. This work would provide a novel option to treat low-strength CWW, discern the relationship between bacterial community and CWW quality, and further explore the cometabolic degradation through bacterial community structures.
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Affiliation(s)
- Jia Zhou
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Haisong Li
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China.
| | - Xiaolei Chen
- ZhiHe Environmental Science and Technology Co., Ltd., Zhengzhou 450001, China
| | - Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Wenning Mai
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China; School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Changqing Sun
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
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42
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Tsui C, Wan D, Grewal J, Barlow A, Kiess M, Krahn A, Human D, Chakrabarti S, Sathananthan J. CHADS2 SCORE ASSOCIATED WITH ATRIAL FIBRILLATION BUT NOT PREDICTIVE OF STROKE IN ADULTS WITH CONGENITAL HEART DISEASE. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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43
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Cheung C, Wan D, Grunau B, Taylor C, Deyell M, Fordyce C, Wenner J, Kiamanesh O, Kaila K, Christenson J, Farkouh M, Ramanathan K. P2749Is relying on ST depression to help predict coronary artery disease after an out-of-hospital cardiac arrest harming patients? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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44
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Liu Y, Lin X, Zhou X, Wan D, Wang Z, Wu X, Yin Y. Effects of dynamic feeding low and high methionine diets on egg quality traits in laying hens. Poult Sci 2017; 96:1459-1465. [DOI: 10.3382/ps/pew398] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 10/10/2016] [Indexed: 12/20/2022] Open
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45
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Wan D, Liu Y, Wang Y, Wang H, Xiao S. Simultaneous bio-autotrophic reduction of perchlorate and nitrate in a sulfur packed bed reactor: Kinetics and bacterial community structure. Water Res 2017. [PMID: 27838020 DOI: 10.1016/j.watres.2016.11.003.9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This study investigated the simultaneous removal of perchlorate and nitrate from aqueous solution in an up-flow sulfur autotrophic reduction reactor. A nitrate and perchlorate containing pollution solution was treated with a remarkable removal efficiency greater than 97%. The concentration of nitrate was 22.03 ± 1.07 mg-N/L coexisting with perchlorate either 21.87 ± 1.03 mg/L or 471.7 ± 50.3 μg/L, in this case the reactor could be operated at a hydraulic retention time (HRT) ranging from 12.00 h to 0.75 h. Half-order kinetics model fit the experimental data well; this indicates that diffusion in the biofilm was the limiting step. Perchlorate reduction required a longer reaction time than the coexisting nitrate, regardless of the perchlorate concentration. Sulfur (S) disproportionation was inhibited when nitrate was not completely removed; whereas it was accelerated when perchlorate decreased to low concentrations. This process therefore generated excessive sulfate and consumed much more alkalinity. High-throughput sequencing method was used to analyze bacterial community spatial distribution in the reactor under different operational conditions. The reduction of the two contaminants was accompanied by a decrease in biodiversity. The results indicated that Sulfuricella, Sulfuritalea Thiobacillus, and Sulfurimonas are effective DB (denitrification bacteria)/PRB (perchlorate reduction bacteria). The Chlorobaculum genus was the dominant bacteria associated with S disproportionation.
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Affiliation(s)
- Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yongde Liu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yiyi Wang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Hongjie Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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46
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Wan D, Liu Y, Wang Y, Wang H, Xiao S. Simultaneous bio-autotrophic reduction of perchlorate and nitrate in a sulfur packed bed reactor: Kinetics and bacterial community structure. Water Res 2017; 108:280-292. [PMID: 27838020 DOI: 10.1016/j.watres.2016.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
This study investigated the simultaneous removal of perchlorate and nitrate from aqueous solution in an up-flow sulfur autotrophic reduction reactor. A nitrate and perchlorate containing pollution solution was treated with a remarkable removal efficiency greater than 97%. The concentration of nitrate was 22.03 ± 1.07 mg-N/L coexisting with perchlorate either 21.87 ± 1.03 mg/L or 471.7 ± 50.3 μg/L, in this case the reactor could be operated at a hydraulic retention time (HRT) ranging from 12.00 h to 0.75 h. Half-order kinetics model fit the experimental data well; this indicates that diffusion in the biofilm was the limiting step. Perchlorate reduction required a longer reaction time than the coexisting nitrate, regardless of the perchlorate concentration. Sulfur (S) disproportionation was inhibited when nitrate was not completely removed; whereas it was accelerated when perchlorate decreased to low concentrations. This process therefore generated excessive sulfate and consumed much more alkalinity. High-throughput sequencing method was used to analyze bacterial community spatial distribution in the reactor under different operational conditions. The reduction of the two contaminants was accompanied by a decrease in biodiversity. The results indicated that Sulfuricella, Sulfuritalea Thiobacillus, and Sulfurimonas are effective DB (denitrification bacteria)/PRB (perchlorate reduction bacteria). The Chlorobaculum genus was the dominant bacteria associated with S disproportionation.
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Affiliation(s)
- Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.
| | - Yongde Liu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yiyi Wang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Hongjie Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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47
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Sun X, Li B, Wan D, Wang N. Using a novel adsorbent macrocyclic compound cucurbit[8]uril for Pb 2+ removal from aqueous solution. J Environ Sci (China) 2016; 50:3-12. [PMID: 28034427 DOI: 10.1016/j.jes.2016.04.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/31/2016] [Accepted: 04/14/2016] [Indexed: 06/06/2023]
Abstract
In this study, cucurbit[8]uril (CB[8]) was utilized as a kind of new adsorbent to remove Pb2+ ions from aqueous solution. With the solution pH increased from 2 to 6, the removal efficiency of adsorption increased from 55.6% to 74.5%correspondingly. The uptake of Pb2+ increased rapidly in the initial 30min, and then the adsorption rate became slower. The Pseudo-second order model could be used to interpret the adsorption kinetics satisfactorily; and the rate determining step in Pb2+ adsorption onto CB[8] was the external mass transfer step. Equilibrium isotherm study reveals that the Langmuir model gave a better fitting result than Freundlich model. The maximum adsorption capacity calculated by the Langmuir model was 152.67mg/g for 298K, 149.70mg/g for 313K and 136.42mg/g for 323K, respectively. The adsorption is a spontaneous process of exothermic nature. The effect of the adsorbent dosage and the influences of solution pH and co-existing cations were also investigated. The CB[8] was synthesized and characterized by 1H NMR, IR, ESI-MS spectra, SEM-EDAX, Zeta-potential and BET-analysis. The adsorption mechanism was due to the coordination between CB[8] molecule and Pb2+ ions.
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Affiliation(s)
- Xuzhuo Sun
- School of Chemical and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Bo Li
- School of Chemical and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Dongjin Wan
- School of Chemical and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Ning Wang
- School of Chemical and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
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48
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Xiao S, Wan D, Zhang K, Qu H, Peng J. Enhanced photoelectrocatalytic degradation of ammonia by in situ photoelectrogenerated active chlorine on TiO 2 nanotube electrodes. J Environ Sci (China) 2016; 50:103-108. [PMID: 28034419 DOI: 10.1016/j.jes.2016.04.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 03/31/2016] [Accepted: 04/25/2016] [Indexed: 06/06/2023]
Abstract
TiO2 nanotube (TiNT) electrodes anodized in fluorinated organic solutions were successfully prepared on Ti sheets. Field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were performed to characterize the TiNT electrodes. The linear voltammetry results under irradiation showed that the TiNT electrode annealed at 450°C presented the highest photoelectrochemical activity. By combining photocatalytic with electrochemical process, a significantly synergetic effect on ammonia degradation was observed with Na2SO4 as supporting electrolyte at pH10.7. Furthermore, the photoelectrocatalytic efficiency on the ammonia degradation was greatly enhanced in presence of chloride ions without the limitation of pH. The degradation rate was improved by 14.8 times reaching 4.98×10-2min-1 at pH10.7 and a faster degradation rate of 6.34×10-2min-1 was obtained at pH3.01. The in situ photoelectrocatalytic generated active chlorine was proposed to be responsible for the improved efficiency. On the other hand, an enhanced degradation of ammonia using TiNT electrode fabricated in fluorinated organic solution was also confirmed compared to TiNT electrode anodized in fluorinated water solution and TiO2 film electrode fabricated by sol-gel method. Finally, the effect of chloride concentration was also discussed.
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Affiliation(s)
- Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Kun Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Hongbin Qu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jianfeng Peng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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49
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Wan D, Liu Y, Niu Z, Xiao S, Li D. Perchlorate reduction by hydrogen autotrophic bacteria and microbial community analysis using high-throughput sequencing. Biodegradation 2015; 27:47-57. [PMID: 26714962 DOI: 10.1007/s10532-015-9754-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 12/22/2015] [Indexed: 10/22/2022]
Abstract
Hydrogen autotrophic reduction of perchlorate have advantages of high removal efficiency and harmless to drinking water. But so far the reported information about the microbial community structure was comparatively limited, changes in the biodiversity and the dominant bacteria during acclimation process required detailed study. In this study, perchlorate-reducing hydrogen autotrophic bacteria were acclimated by hydrogen aeration from activated sludge. For the first time, high-throughput sequencing was applied to analyze changes in biodiversity and the dominant bacteria during acclimation process. The Michaelis-Menten model described the perchlorate reduction kinetics well. Model parameters q(max) and K(s) were 2.521-3.245 (mg ClO4(-)/gVSS h) and 5.44-8.23 (mg/l), respectively. Microbial perchlorate reduction occurred across at pH range 5.0-11.0; removal was highest at pH 9.0. The enriched mixed bacteria could use perchlorate, nitrate and sulfate as electron accepter, and the sequence of preference was: NO3(-) > ClO4(-) > SO4(2-). Compared to the feed culture, biodiversity decreased greatly during acclimation process, the microbial community structure gradually stabilized after 9 acclimation cycles. The Thauera genus related to Rhodocyclales was the dominated perchlorate reducing bacteria (PRB) in the mixed culture.
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Affiliation(s)
- Dongjin Wan
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Yongde Liu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Zhenhua Niu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Daorong Li
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China
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50
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Huang L, Luo X, Shao J, Yan H, Qiu Y, Ke P, Zheng W, Xu B, Li W, Sun D, Cao D, Chen C, Zhuo F, Lin X, Tang F, Bao B, Zhou Y, Zhang X, Li H, Li J, Wan D, Yang L, Chen Y, Zhong Q, Gu X, Liu J, Huang L, Xie R, Li X, Xu Y, Luo Z, Liao M, Wang H, Sun L, Li H, Lau GW, Duan C. Epidemiology and characteristics of the dengue outbreak in Guangdong, Southern China, in 2014. Eur J Clin Microbiol Infect Dis 2015; 35:269-77. [DOI: 10.1007/s10096-015-2540-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 11/29/2015] [Indexed: 01/27/2023]
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