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Tuersun N, Wang Y, Aihemaiti A, Wang J, Huang C. Effects of Alkali Activation of the Cotton Straw Biochar on the Adsorption Performance for Cd 2. ACS OMEGA 2024; 9:17989-18000. [PMID: 38680346 PMCID: PMC11044168 DOI: 10.1021/acsomega.3c09501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 05/01/2024]
Abstract
In this study, a single factor exploration method was adopted to optimize the cotton shell-based activated carbon adsorption reaction time, temperature, pH value, initial concentration of cadmium ion, and other conditions. The experimental results showed that under the conditions of Cd2+ solution pH = 8, initial concentration of 100 mg/L, adsorption reaction time of 180 min, adsorption temperature of 45 °C, cotton shell-based activated carbon dosage of about 0.1 g, the removal rate of Cd2+ was 94.03%, the adsorption capacity was 51.95 mg/g, and the error was only 0.05%. The adsorption kinetic analysis of this study conforms to the quasi-second-order kinetic model, the adsorption isotherm analysis conforms to the Langmuir adsorption isothermal model, and the Gibbs free energy of the adsorption process is negative; the above simulation analysis also proves the spontaneity and feasibility of the adsorption process.
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Affiliation(s)
- Nuremanguli Tuersun
- Xinjiang
Biological Solid Waste Recycling Engineering Technology Research Center,
College of Chemistry and Environmental Sciences, Kashi University, Kashi 844000, China
| | - Yingjie Wang
- Xinjiang
Key Laboratory of Novel Functional Materials Chemistry, College of
Chemistry and Environmental Sciences, Kashi
University, Kashi 844000, PR China
| | - Aikelaimu Aihemaiti
- Laboratory
of Environmental Sciences and Technology, Xinjiang Technical Institute
of Physics & Chemistry, and Key Laboratory of Functional Materials
and Devices for Special Environments, Chinese
Academy of Sciences, Urumqi 830011, China
| | - Jing Wang
- Xinjiang
Biological Solid Waste Recycling Engineering Technology Research Center,
College of Chemistry and Environmental Sciences, Kashi University, Kashi 844000, China
| | - Chuanjing Huang
- Department
of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Fujian 361000, China
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2
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Sultan H, Li Y, Ahmed W, Yixue M, Shah A, Faizan M, Ahmad A, Abbas HMM, Nie L, Khan MN. Biochar and nano biochar: Enhancing salt resilience in plants and soil while mitigating greenhouse gas emissions: A comprehensive review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 355:120448. [PMID: 38422850 DOI: 10.1016/j.jenvman.2024.120448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/01/2024] [Accepted: 02/20/2024] [Indexed: 03/02/2024]
Abstract
Salinity stress poses a significant challenge to agriculture, impacting soil health, plant growth and contributing to greenhouse gas (GHG) emissions. In response to these intertwined challenges, the use of biochar and its nanoscale counterpart, nano-biochar, has gained increasing attention. This comprehensive review explores the heterogeneous role of biochar and nano-biochar in enhancing salt resilience in plants and soil while concurrently mitigating GHG emissions. The review discusses the effects of these amendments on soil physicochemical properties, improved water and nutrient uptake, reduced oxidative damage, enhanced growth and the alternation of soil microbial communities, enhance soil fertility and resilience. Furthermore, it examines their impact on plant growth, ion homeostasis, osmotic adjustment and plant stress tolerance, promoting plant development under salinity stress conditions. Emphasis is placed on the potential of biochar and nano-biochar to influence soil microbial activities, leading to altered emissions of GHG emissions, particularly nitrous oxide(N2O) and methane(CH4), contributing to climate change mitigation. The comprehensive synthesis of current research findings in this review provides insights into the multifunctional applications of biochar and nano-biochar, highlighting their potential to address salinity stress in agriculture and their role in sustainable soil and environmental management. Moreover, it identifies areas for further investigation, aiming to enhance our understanding of the intricate interplay between biochar, nano-biochar, soil, plants, and greenhouse gas emissions.
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Affiliation(s)
- Haider Sultan
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
| | - Yusheng Li
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Waqas Ahmed
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, 570228, China
| | - Mu Yixue
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Asad Shah
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Mohammad Faizan
- Botany Section, School of Sciences, Maulana Azad National Urdu University, Hyderabad, 500032, India
| | - Aqeel Ahmad
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, 2751, Australia
| | - Hafiz Muhammad Mazhar Abbas
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Lixiao Nie
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
| | - Mohammad Nauman Khan
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
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3
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Wang A, Wu M, Li Z, Zhou Y, Zhu F, Huang Z. Utilizing different types of biomass materials to modify steel slag for the preparation of composite materials used in the adsorption and solidification of Pb in solutions and soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:170023. [PMID: 38218480 DOI: 10.1016/j.scitotenv.2024.170023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/15/2024]
Abstract
This study utilized discarded steel slag (SS) as raw material and prepared modified steel slag materials (SS-SBC, SS-NBC, SS-BHA) through modification with biomass materials such as straw biochar (SBC), nutshell biochar (NBC), and biochemical humic acid (BHA). These materials were then applied for the removal of Pb from both solution and soil. The physical and chemical properties of the materials were analyzed using characterization techniques such as SEM, EDS, XRD, and BET. The specific surface area of the modified materials increased from the original 3.8584 m2/g to 34.7133 m2/g, 181.7329 m2/g, and 7.7384 m2/g, respectively. The study then explored the influence of different adsorption conditions on the adsorption capacity of Pb in solution, determining the optimal conditions as follows: initial concentration of 200 mg/L, adsorbent mass of 0.04 g, temperature of 15 °C, and pH = 2. To further investigate the adsorption process, kinetic and isotherm models were established. The results indicated that the adsorption process for all three materials followed a pseudo-second-order kinetic model and Freundlich isotherm model, suggesting a multi-layer chemical adsorption. Thermodynamic analysis revealed that the adsorption process was an exothermic spontaneous reaction. Soil cultivation experiments were conducted to explore the effects of different material addition amounts and cultivation times on the passivation of Pb-polluted soil. Analysis of heavy metal forms in the soil revealed that the addition of modified materials reduced the acid-extractable form of Pb in the soil and increased the residual form, which is beneficial for reducing the migration of Pb in the soil. FT-IR and XPS analyses were employed to study the functional groups, element composition, and valence states before and after adsorption passivation of Pb by the three materials. The results confirmed that the adsorption mechanisms of SS-SBC, SS-NBC, and SS-BHA mainly involved electrostatic adsorption, ion and ligand exchange, and surface precipitation. This study not only provides a new material for adsorbing and immobilizing heavy metals in soil and water but also offers a new approach for the resource utilization of steel slag waste.
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Affiliation(s)
- An Wang
- School of Chemical and Environmental Engineering, China University of Mining and Technology-, Beijing, Beijing 100083, China
| | - Meiling Wu
- School of Chemical and Environmental Engineering, China University of Mining and Technology-, Beijing, Beijing 100083, China
| | - Zhongyuan Li
- CSCEC 8TH Division Environmental Technology Co., Ltd, Shanghai 200444, China
| | - Yuqiang Zhou
- CSCEC 8TH Division Environmental Technology Co., Ltd, Shanghai 200444, China
| | - Fanmin Zhu
- School of Chemical and Environmental Engineering, China University of Mining and Technology-, Beijing, Beijing 100083, China
| | - Zhanbin Huang
- School of Chemical and Environmental Engineering, China University of Mining and Technology-, Beijing, Beijing 100083, China.
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4
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Ma J, Hua Z, Noreen S, Malik Z, Riaz M, Kamran M, Ali S, Elshikh MS, Chen F. Chemical and mechanical coating of sulfur on baby corn biochar and their role in soil Pb availability, uptake, and growth of tomato under Pb contamination. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122654. [PMID: 37778489 DOI: 10.1016/j.envpol.2023.122654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/17/2023] [Accepted: 09/28/2023] [Indexed: 10/03/2023]
Abstract
In recent ages, industrial revolution and natural weathering processes have been increasing lead (Pb) contamination in agricultural soils, therefore, green remediation technologies are becoming attractive and cost-effective. In the current pot study, 1% and 2% (w/w) application rates of sulfur (S) alone and novel chemo-mechanically S-modified baby corn biochars (CSB and MSB) were applied in a Pb-contaminated (500 mg/kg) soil to evaluate tomato (Lycopersicon esculentum L.) growth, Pb uptake and its soil availability. The results from SEM-EDS and XRD patterns confirmed the S enrichment on the surface of baby-corn biochar. Further, Pb treatment alone imposed a significant reduction in biomass accumulation, photosynthetic pigments, antioxidative mechanism, root traits, and Pb-tolerance index because of increased soil Pb availability and its uptake, translocation and biological accumulation in various tissues of tomato. However, incorporation of lower rate of elemental S (1%) and higher rates of biochars, especially chemically S-modified biochar, CSB (2%) significantly improved dry biomass production, Pb-tolerance index, physiological attributes and antioxidative defense system of tomato plants. These results might be due to a prominent decrease in soil Pb availability by 37.5%, Pb concentration in shoot by 66.7% and root by 58.3%, soil to root transfer by 33.8%, and root to shoot transfer by 20.2% in tomato plants under 2% application rate of CSB, as compared with the Pb treatment without any amendment. Moreover, sulfur treatment induced a significant impact in reduction of soil pH (from 8.97-7.47) as compared to the biochar treatments under Pb-toxicity. The current findings provided an insight that 2% chemically S-modified biochar (CSB) has significant potential to improve the tomato growth by reducing Pb bioavailability in the Pb-contaminated soil, compared to the S alone and MSB amendments.
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Affiliation(s)
- Jing Ma
- School of Public Administration, Hohai University, Nanjing 211100, China
| | - Ziyi Hua
- School of Public Administration, Hohai University, Nanjing 211100, China
| | - Sana Noreen
- Department of Soil Science, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur 63100, Pakistan
| | - Zaffar Malik
- Department of Soil Science, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur 63100, Pakistan
| | - Muhammad Riaz
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Muhamamd Kamran
- Department of Soil Science, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur 63100, Pakistan; CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Shafaqat Ali
- Department of Environmental Science, Government College University Faisalabad, Faisalabad, 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan.
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Fu Chen
- School of Public Administration, Hohai University, Nanjing 211100, China
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5
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Qu Y, Yang Y, Sonne C, Chen X, Yue X, Gu H, Lam SS, Peng W. Phytosphere purification of urban domestic wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 336:122417. [PMID: 37598935 DOI: 10.1016/j.envpol.2023.122417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/26/2023] [Accepted: 08/18/2023] [Indexed: 08/22/2023]
Abstract
Industrialization and overpopulation have polluted aquatic environments with significant impacts on human health and wildlife. The main pollutants in urban sewage are nitrogen, phosphorus, heavy metals and organic pollutants, which need to be treated with sewage, and the use of aquatic plants to purify wastewater has high efficiency and low cost. However, the effectiveness and efficiency of phytoremediation are also affected by temperature, pH, microorganisms and other factors. The use of biochar can reduce the cost of wastewater purification, and the combination of biochar and nanotechnology can improve the efficiency of wastewater purification. Some aquatic plants can enrich pollutants in wastewater, so it can be considered to plant these aquatic plants in constructed wetlands to achieve the effect of purifying wastewater. Biochar treatment technology can purify wastewater with high efficiency and low cost, and can be further applied to constructed wetlands. In this paper, the latest research progress of various pollutants in wastewater purification by aquatic plants is reviewed, and the efficient treatment technology of wastewater by biochar is discussed. It provides theoretical basis for phytoremediation of urban sewage pollution in the future.
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Affiliation(s)
- Yimeng Qu
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Yafeng Yang
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Landscape Architecture,Henan Agricultural University,Zhengzhou 450002,China
| | - Christian Sonne
- Department of Ecoscience, Aarhus University, Frederiksborgvej 399, Roskilde DK-4000, Denmark; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India
| | - Xiangmeng Chen
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Science,Henan Agricultural University,Zhengzhou 450002,China
| | - Xiaochen Yue
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Haiping Gu
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan; Center for Global Health Research (CGHR), Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, India
| | - Wanxi Peng
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China.
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6
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Yan C, Cheng Z, Zhang X, Zhang Y, Chen X, Zeng G, Xu H. Highly efficient catalytic ozonation degradation of levofloxacin by facile hydrogenation-modified red mud wastes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122149. [PMID: 37433366 DOI: 10.1016/j.envpol.2023.122149] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/05/2023] [Accepted: 07/03/2023] [Indexed: 07/13/2023]
Abstract
Iron-rich red mud (RM) is a potential catalyst. However, as industrial waste, is strongly alkaline, low effectiveness, and safety concerns are problems that cannot be ignored, it is urgent to mine out a reasonable disposal and utilization technology for the waste. In this study, an effective catalyst (H-RM) was obtained by facile hydrogenation heating modification of red mud. Then above-prepared H-RM was applied in the catalytic ozonation degradation of levofloxacin (LEV). The H-RM exhibited more remarkable catalytic activities than the RM in terms of LEV degradation, and the optimal efficiency can reach over 90% within 50 min. The mechanism experiment proved that the concentration of dissolved ozone and hydroxyl radical (•OH) significantly increased, which enhanced the oxidation effect. Hydroxyl radical played a dominant role in the degradation of LEV. In the safety test, it is concluded that the concentration of total hexavalent chromium (total Cr(Ⅵ)) in the H-RM catalyst decreases and the leaching concentration of water-soluble Cr(Ⅵ) in aqueous solution is low. The results indicated that the hydrogenation technique is an available Cr (Ⅵ) detoxification method for RM. Moreover, the H-RM has excellent catalytic stability, which is beneficial to recycling and maintains high activity. This research provides an effective means to fulfill the reuse of industrial waste as an alternative to standard raw materials, and comprehensive utilization of the waste to attain the purpose of treating pollution with wastes.
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Affiliation(s)
- Chaoqun Yan
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, PR China; School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China
| | - Zhiliang Cheng
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China
| | - Xuan Zhang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China
| | - Yumei Zhang
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, PR China
| | - Xianghan Chen
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, PR China
| | - Guoquan Zeng
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, PR China
| | - Heng Xu
- Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, Sichuan, PR China.
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7
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Mahmood M, Wang Y, Ahmed W, Mehmood S, Ayyoub A, Elnahal ASM, Li W, Zhan X. Exploring biochar and fishpond sediments potential to change soil phosphorus fractions and availability. FRONTIERS IN PLANT SCIENCE 2023; 14:1224583. [PMID: 37636081 PMCID: PMC10450619 DOI: 10.3389/fpls.2023.1224583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/21/2023] [Indexed: 08/29/2023]
Abstract
Phosphorus (P) availability in soil is paradoxical, with a significant portion of applied P accumulating in the soil, potentially affecting plant production. The impact of biochar (BR) and fishpond sediments (FPS) as fertilizers on P fixation remains unclear. This study aimed to determine the optimal ratio of BR, modified biochar (MBR), and FPS as fertilizer replacements. A pot experiment with maize evaluated the transformation of P into inorganic (Pi) and organic (Po) fractions and their contribution to P uptake. Different percentages of FPS, BR, and MBR were applied as treatments (T1-T7), T1 [(0.0)], T2 [FPS (25.0%)], T3 [FPS (25.0%) + BR (1%)], T [FPS (25%) +MBR (3%)], T5 [FPS (35%)], T6 [FPS (35%) +BR (1%)], and T7 [FPS (35%) + MBR (1%)]. Using the modified Hedley method and the Tiessen and Moir fractionation scheme, P fractions were determined. Results showed that various rates of MBR, BR, and FPS significantly increased labile and moderately labile P fractions (NaHCO3-Pi, NaHCO3-Po, HClD-Pi, and HClC-Pi) and residual P fractions compared with the control (T1). Positive correlations were observed between P uptake, phosphatase enzyme activity, and NaHCO3-Pi. Maximum P uptake and phosphatase activity were observed in T6 and T7 treatments. The addition of BR, MBR, and FPS increased Po fractions. Unlike the decline in NaOH-Po fraction, NaHCO3-Po and HClc-Po fractions increased. All Pi fractions, particularly apatite (HClD-Pi), increased across the T1-T7 treatments. HClD-Pi was the largest contributor to total P (40.7%) and can convert into accessible P over time. The T5 treatment showed a 0.88% rise in residual P. HClD-Pi and residual P fractions positively correlated with P uptake, phosphatase activity, NaOH-Pi, and NaOH-Po moderately available fractions. Regression analysis revealed that higher concentrations of metals such as Ca, Zn, and Cr significantly decreased labile organic and inorganic P fractions (NaHCO3-Pi, R 2 = 0.13, 0.36, 0.09) and their availability (NaHCO3-Po, R 2 = 0.01, 0.03, 0.25). Excessive solo BR amendments did not consistently increase P availability, but optimal simple and MBR increased residual P contents in moderately labile and labile forms (including NaOH-Pi, NaHCO3-Pi, and HClD-Pi). Overall, our findings suggest that the co-addition of BR and FPS can enhance soil P availability via increasing the activity of phosphatase enzyme, thereby enhancing plant P uptake and use efficiency, which eventually maintains the provision of ecosystem functions and services.
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Affiliation(s)
- Mohsin Mahmood
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- Center for Eco-Environment Restoration Engineering of Hainan Province, Hainan University, Haikou, China
| | - Yunting Wang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- Center for Eco-Environment Restoration Engineering of Hainan Province, Hainan University, Haikou, China
| | - Waqas Ahmed
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- Center for Eco-Environment Restoration Engineering of Hainan Province, Hainan University, Haikou, China
| | - Sajid Mehmood
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- Center for Eco-Environment Restoration Engineering of Hainan Province, Hainan University, Haikou, China
| | - Anam Ayyoub
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Ahmed S. M. Elnahal
- Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Weidong Li
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- Center for Eco-Environment Restoration Engineering of Hainan Province, Hainan University, Haikou, China
| | - Xin Zhan
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, China
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Marine Science, Hainan University, Haikou, China
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8
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Huang Y, Luo X, Liu C, You S, Rad S, Qin L. Effective adsorption of Pb(ii) from wastewater using MnO 2 loaded MgFe-LD(H)O composites: adsorption behavior and mechanism. RSC Adv 2023; 13:19288-19300. [PMID: 37377869 PMCID: PMC10291440 DOI: 10.1039/d3ra03035k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023] Open
Abstract
Pb(ii) adsorption by MnO2/MgFe-layered double hydroxide (MnO2/MgFe-LDH) and MnO2/MgFe-layered metal oxide (MnO2/MgFe-LDO) materials was experimentally studied in lab-scale batches for remediation property and mechanism analysis. Based on our results, the optimum adsorption capacity for Pb(ii) was achieved at the calcination temperature of 400 °C for MnO2/MgFe-LDH. Langmuir and Freundlich adsorption isotherm models, pseudo-first-order and pseudo-second-order kinetics, Elovich model, and thermodynamic studies were used for exploring the Pb(ii) adsorption mechanism of the two composites. In contrast to MnO2/MgFe-LDH, MnO2/MgFe-LDO400 °C has a stronger adsorption capacity and the Freundlich adsorption isotherm model (R2 > 0.948), the pseudo-second-order kinetic model (R2 > 0.998), and the Elovich model (R2 > 0.950) provide great fits to the experimental data, indicating that the adsorption occurs predominantly via chemisorption. The thermodynamic model suggests that MnO2/MgFe-LDO400 °C is spontaneously heat-absorbing during the adsorption process. The maximum adsorption capacity of MnO2/MgFe-LDO400 °C for Pb(ii) was 531.86 mg g-1 at a dosage of 1.0 g L-1, pH of 5.0, and temperature of 25 °C. Through characterization analysis, the main mechanisms involved in the adsorption process were precipitation action, complexation with functional groups, electrostatic attraction, cation exchange and isomorphic replacement, and memory effect. Besides, MnO2/MgFe-LDO400 °C has excellent regeneration ability in five adsorption/desorption experiments. The above results highlight the powerful adsorption capacity of MnO2/MgFe-LDO400 °C and may inspire the development of new types of nanostructured adsorbents for wastewater remediation.
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Affiliation(s)
- Yongxiang Huang
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
| | - Xiangping Luo
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
| | - Chongmin Liu
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
| | - Shaohong You
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
| | - Saeed Rad
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
| | - Litang Qin
- College of Environmental Science and Engineering, Guilin University of Technology Guilin 541004 China
- Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology Guilin 541004 China
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9
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Escudero-Curiel S, Pazos M, Sanromán A. Facile one-step synthesis of a versatile nitrogen-doped hydrochar from olive oil production waste, "alperujo", for removing pharmaceuticals from wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 330:121751. [PMID: 37150343 DOI: 10.1016/j.envpol.2023.121751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 04/01/2023] [Accepted: 04/28/2023] [Indexed: 05/09/2023]
Abstract
In line with the principles of zero waste and recycling, alperujo (AL) was used in this study to produce a value-added product: hydrochar (HC) with high adsorption capacity. An optimization of the hydrothermal carbonization (HTC) conditions, such as temperature, residence time, and water/solid ratio, was carried out to maximize the adsorption capacity. Eight HCs were obtained, and an in-depth comparative characterization, as well as adsorption tests of two pharmaceuticals with very different physicochemical properties (fluoxetine (FLX) and cefazolin (CFZ)), were performed. This first step allowed for elucidation of the best candidates to carry out nitrogen grafting on their surface, resulting in the HC obtained at a higher water/solid ratio and temperature, and longer residence time: 3-220ºC-2.5 h with a maximum uptake of 4.6 and 0.4 mg/g for FLX and CFZ, respectively. After that, a facile one-step, one-pot synthesis of nitrogen-doped hydrochars (N-HC) was developed to prepare a versatile bio-adsorbent with enhanced adsorption capacity. Two N-HCs were prepared using urea (U-HC) and polyethyleneimine (PEI-HC) and were intensively characterized to shed light on the adsorption mechanism. In both cases, amide groups were formed, which favored the adsorption process. PEI-HC acquired an outstanding maximum adsorption capacity of 983.84 mg/g for CFZ, and 29.31 mg/g for FLX, and the process was well described by the Freundlich isotherm and pseudo-second-order kinetic model. A co-adsorption test was performed using PEI-HC for both pharmaceuticals, finding that the adsorption process occurs in different active sites because there was no interference between the pollutants. This fact corroborates the versatility of the new bio-adsorbent synthesized.
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Affiliation(s)
- S Escudero-Curiel
- CINTECX. Universidade de Vigo, Department of Chemical Engineering. Campus As Lagoas-Marcosende, 36310, Vigo, Spain.
| | - M Pazos
- CINTECX. Universidade de Vigo, Department of Chemical Engineering. Campus As Lagoas-Marcosende, 36310, Vigo, Spain
| | - A Sanromán
- CINTECX. Universidade de Vigo, Department of Chemical Engineering. Campus As Lagoas-Marcosende, 36310, Vigo, Spain
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