1
|
Pan H, Sun C, Shen T, Sun J, He S, Li T, Lu X. Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms. RSC Adv 2024; 14:2705-2719. [PMID: 38229713 PMCID: PMC10790280 DOI: 10.1039/d3ra07232k] [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: 10/24/2023] [Accepted: 12/25/2023] [Indexed: 01/18/2024] Open
Abstract
Coal gasification crude slag (CGCS) is the side-product of the coal gasification process, and its effective utilization has attracted great attention. A novel flocculant of poly-aluminum-ferric-acetate-chloride (PAFAC) was synthesized based on the recovery of CGCS by a two-step acid leaching process, namely HCl-acid leaching and HAc-acid leaching, which was optimized by an acid leaching liquor volume ratio of HCl to HAc of 3 : 2, polymerization pH of 3.5, and reaction temperature and time of 70 °C and 3.0 h, respectively. The performance of PAFAC was further evaluated by kaolin simulated wastewater, domestic sewage, river water, and aquaculture wastewater. The results revealed that PAFAC was feasible for the removal of turbidity, chemical oxygen demand (COD) and total phosphorus (TP). Moreover, PAFAC was characterized by X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray fluorescence spectrometry (XRF) and scanning electron microscopy (SEM), which proved that PAFAC was a kind of amorphous polyionic composite. Additionally, the acid leaching kinetics and flocculation mechanisms were further investigated. It was found that the acid leaching process was followed by the unreacted shrinkage core model, and the flocculation process was dominated by charge neutralization, adsorption bridging and precipitation net trapping. The work is expected to develop a new method for the safe disposal of CGCS and provide a novel way for the preparation of Fe-Al composite flocculants, especially, offering a potential strategy for the promotion of the additional value of the coal chemical industry.
Collapse
Affiliation(s)
- Haoqi Pan
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Chenxu Sun
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Tingting Shen
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Jing Sun
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Shaocang He
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Tianpeng Li
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Xuqian Lu
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| |
Collapse
|
2
|
Ramezanzadeh S, Esmaeilzadeh F, Mowla D, Elhambakhsh A, Kanani M. Insight into the application of supercritical water oxidation for dichlorvos degradation: experimental and simulation aspects. ENVIRONMENTAL TECHNOLOGY 2023; 44:4113-4122. [PMID: 35587737 DOI: 10.1080/09593330.2022.2080000] [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: 01/19/2022] [Accepted: 04/05/2022] [Indexed: 06/15/2023]
Abstract
Dichlorvos or 2,2-dichlorovinyl dimethyl phosphate (DDVP) ( C 4 H 7 C l 2 O 4 P ) is a chlorinated organophosphorus pesticide, which is frequently detected in agricultural wastewater. Herein, a batch reactor was used to carry out the supercritical water oxidation (SCWO) of a synthetic wastewater containing dichlorvos as a very hazardous agricultural pollutant. To do so, the impact of four operating parameters including dichlorvos concentration (100-500 ppm), oxidant coefficient (0.7-2), temperature (300-500°C) and time (0-100 s) on dichlorvos removal was optimized by the response surface method (RSM). According to the obtained results, at optimal conditions (i.e. initial concentration of dichlorvos 107.5 ppm, oxidation ratio 1.9234, temperature 419.9°C and time 79.94 s), as an index for dichlorvos removal, the chemical oxygen demand (COD) was found to be about 96.34%. Also, the results of high-performance liquid chromatography test showed that dichloroacetaldehyde (C2CL2H2O) and dichloroacetic acid (C2CL2H2O2) were created as intermediate substances during the dichlorvos degradation. Further, the molecular dynamics simulation was performed using ReaxFF force field to show the reaction path and products obtained in each step of the dichlorvos removal. Finally, as an indication, the simulation results indicated a good coordination with the experimental results.
Collapse
Affiliation(s)
- Shiva Ramezanzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Feridun Esmaeilzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Dariush Mowla
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Abbas Elhambakhsh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Mansour Kanani
- Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
| |
Collapse
|
3
|
Zainudin NF, Sam ST, Wong YS, Ismail H, Walli S, Inoue K, Kawamura G, Tan WK. Degradation of Diazo Congo Red Dye by Using Synthesized Poly-Ferric-Silicate-Sulphate through Co-Polymerization Process. Polymers (Basel) 2023; 15:polym15010237. [PMID: 36616587 PMCID: PMC9824507 DOI: 10.3390/polym15010237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 01/04/2023] Open
Abstract
The ability of poly-ferric-silicate-sulphate (PFSS) synthesized via a co-polymerization process has been applied for the removal of diazo Congo red dye. A novel degradation pathway of diazo Congo red dye by using PFSS is proposed based on LC-MS analysis. Diazo Congo red dye was successfully removed using synthesized PFSS at lower coagulant dosages and a wider pH range, i.e., 9 mg/L from pH 5 to 7, 11 mg/L at pH 9, and 50 mg/L at pH 11. The azo bond cleavage was verified by the UV-Vis spectra of diazo Congo red-loaded PFSS and FTIR spectra which showed disappearance of the peak at 1584 cm-1 for -N=N- stretching vibrations. The synchronized results of UV-Vis spectra, FTIR, and the LC-MS analysis in this study confirmed the significance of the Si and Fe bond in PFSS towards the degradation of diazo Congo red dye. The successfully synthesized PFSS coagulant was characterized by FTIR, SEM, TEM, and HRTEM analysis. From this analysis, it was proven that PFSS is a polycrystalline material which is favorable for the coagulation-flocculation process. Based on all these findings, it was established that synthesized PFSS can be employed as a highly efficient polymeric coagulant for the removal of dye from wastewater.
Collapse
Affiliation(s)
- Nor Fauziah Zainudin
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 02600, Perlis, Malaysia
| | - Sung Ting Sam
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 02600, Perlis, Malaysia
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 2, Taman Muhibbah, Arau 02600, Perlis, Malaysia
- Correspondence: (S.T.S.); (W.K.T.)
| | - Yee Shian Wong
- Faculty of Civil Engineering & Technology, Universiti Malaysia Perlis (UniMAP), Arau 02600, Perlis, Malaysia
| | - Hanafi Ismail
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Penang, Malaysia
| | - Saparu Walli
- Frutania Industry Sdn. Bhd., Lot 1 & 2, Kawasan Industri MARA Jejawi, Jalan Kangar-Arau, Kangar 01000, Perlis, Malaysia
| | - Kazuki Inoue
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Go Kawamura
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Wai Kian Tan
- Institute of Liberal Arts and Sciences, Toyohashi University of Technology, Toyohashi 441-8580, Japan
- Correspondence: (S.T.S.); (W.K.T.)
| |
Collapse
|
4
|
Yaghoobian S, Hasani Zonoozi M, Saeedi M. Performance evaluation of Fe-based water treatment sludge for dewatering of iron ore tailings slurry using coagulation-flocculation process: Optimization through response surface methodology. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 316:115240. [PMID: 35576712 DOI: 10.1016/j.jenvman.2022.115240] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
This research attempted to investigate the feasibility of using drinking water treatment sludge (ferric chloride sludge, FCS) as a coagulant for turbidity removal from iron ore tailings slurry. The evaluation was performed in two phases. In the first phase, the one factor at a time (OFAT) approach was used to study the effects of FCS dosage, initial pH, and initial turbidity on turbidity removal efficiency (TR%) and the volume of the sediment produced at the end of the process (SV). In the second phase, response surface methodology (RSM) was employed to assess the individual and interaction effects of the parameters on TR% and SV. Numerical multiple-response optimization was carried out using RSM to maximize TR% and minimize SV simultaneously. At optimum condition (FCS dose of 0.13 g dried FCS/L, initial pH of 10, and initial turbidity of 538 NTU), the removal of all particles in the range of 0.25-1 μm and 2-55 μm from slurry led to the TR% of 78.80% and SV of 0.74 mL (per 250 mL of tailings). Characterization tests indicated that at alkaline pH values, the higher presence of hydroxide compounds intensified the enmeshment in a precipitate or sweep-floc mechanism, which was the predominant removal mechanism in this work. This study demonstrated the remarkable performance of FCS as a coagulant in water reclamation from iron beneficiation wastewater.
Collapse
Affiliation(s)
- Samaneh Yaghoobian
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| | - Maryam Hasani Zonoozi
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| | - Mohsen Saeedi
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| |
Collapse
|
5
|
Ghasemi MN, Esmaeilzadeh F, Mowla D, Elhambakhsh A. Treatment of methyldiethanolamine wastewater using subcritical and supercritical water oxidation: parameters study, process optimization and degradation mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:57688-57702. [PMID: 35355177 DOI: 10.1007/s11356-022-19910-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
In this examination, sub/supercritical water oxidation (SCWO) in a batch reactor was employed to degrade methyldiethanolamine (MDEA). To do so, the impact of different operating parameters including temperature (300-500 °C), time (0-100 s), initial MDEA concentration (1000-4000 ppm), oxidant coefficient (0.7-2), and pH (7.3-9.5) on MDEA degradation was separately and together investigated. Subsequently, the response surface method (RSM) was applied to optimize the operating condition of MDEA degradation. Based on the obtained results, a maximum amount of 97.4% MDEA degradation was achieved at the initial MDEA concentration of 1095 ppm in optimal condition (i.e., oxidant coefficient: 1.913, temperature: 472 °C and residence time: about 17 s). Furthermore, according to the HPLC analysis, there was a negligible amounts of formic acid (CH2O2) and nitrous acid (HNO2) in the solution at the end of MDEA removal experiment. Eventually, the mechanism of MDEA degradation was acquired using molecular dynamics simulation (MDS), which had an acceptable coordination with the experimental results. In this way, the MDS results revealed that the presence of CH2O2 and HNO2 compounds in the products was related to the degradation of MDEA and their production as by-products during the SCWO experiments.
Collapse
Affiliation(s)
- Mohammad Noor Ghasemi
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
| | - Feridun Esmaeilzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran.
| | - Dariush Mowla
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
| | - Abbas Elhambakhsh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
| |
Collapse
|
6
|
Bioremediation of Textile Industrial Effluents Using Nutraceutical Industrial Spent: Laboratory-Scale Demonstration of Circular Economy. NANOMATERIALS 2022; 12:nano12101684. [PMID: 35630906 PMCID: PMC9147257 DOI: 10.3390/nano12101684] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/17/2022]
Abstract
This research reports the first-ever study on abundantly available, environmentally friendly, low-cost and ready-for-use Nutraceutical Industrial Cumin Seed Spent (NICUS) as an innovative adsorbent for bioremediation of a bisazo Acid Red 119 (AR119) dye, a probable mutagen from textile industrial effluents (TIEs). The experiment at the laboratory scale is designed to suit the concepts of sustainability and valorisation under the domain of circular economy. The experimental qe value obtained was 96.00 mg g−1. The optimised conditions of parameters are as follows: pH of 2; adsorption time, 210 min; adsorbent dosage, 0.300 g L−1; particle size, 175 µM; initial dye concentration, 950 mg L−1; orbital shaking, 165 rpm and temperature, 50 °C, producing an impressive value of 748 mg of dye adsorbing on 1 g of dry NICUS. The adsorption capacity of NICUS obtained from the quadratic model developed for process optimisation gave values of 748 mg g−1. As a prelude to commercialisation, five variables that affect the adsorption process were experimentally studied. For the feasibility and efficiency of the process, a two-level fractional factorial experimental design (FFED) was applied to identify variables that influence the adsorption capacity of NICUS. The identified variables were applied to scale experiments by three orders. Nine isotherm models were used to analyse the adsorption equilibrium data. The Vieth–Sladek adsorption isotherm model was found to be the best fit. The pseudo-second-order reaction was the appropriate mechanism for the overall rate of the adsorption process. Mechanistic studies related to mass transfer phenomena were more likely to be dominant over the diffusion process. Techniques such as SEM, FTIR and CHN analysis were used to characterise NICUS. The dye-adsorbed NICUS obtained as “sludge” was used as a reinforcing material for the fabrication of composites using plastic waste. The physicomechanical and chemical properties of thermoplastic and thermoset composite using dye-adsorbed NICUS were evaluated and compared with NICUS composites. Prospects of integrating Small and Medium Enterprises (SMEs) into the circular economy of Nutraceutical Industrial Spent (NIS) are discussed.
Collapse
|
7
|
Yao M, Chen T, Ran Z, Li T, Chen H, Li W. Integral evaluation of production safety and genotoxicity of recycling residual sludge for drinking water treatment plants. ENVIRONMENTAL TECHNOLOGY 2022; 43:1225-1236. [PMID: 32928064 DOI: 10.1080/09593330.2020.1824021] [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: 02/23/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
Recycling residual sludge in drinking water treatment plants (DWTPs) may release excessive heavy metals and organic matter, which are substances of concern because of their toxic and carcinogenic potential. The aim of this study was to investigate potential genotoxic, cytotoxic, and mutagenic effects of recycled residual sludge in terms of quality of water in potable water works. Genotoxic effects of reusing residual sludge were evaluated using: the Ames test, sperm abnormality test in mice, micronucleus assay, comet assay, and single-cell gel electrophoresis assay. The results of the Ames assay show that the disinfected water sample displays bacteriostasis at a dose of 7 L/dish regardless of treatment styles, but mutagenicity ratio (MR) < 2 can still be judged as negative. The micronucleus rates of conventional treatment were slightly genotoxic but only at 4 and 40 L/kg·bw, whereas micronucleus rates of filtered water and disinfectant from the recycling process were negative in all of the dose groups. The levels of DNA damage that are caused by different treatment processes were equivalent. Reusing residual sludge for DWTPs did not contribute to the release of genotoxic or mutagenic compounds, but it did have a remarkable effect on saving the drug dose and increasing drinking water yield. Thus, reusing residual sludge for DWTPs should be widely recommended.
Collapse
Affiliation(s)
- Meng Yao
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
| | - Ting Chen
- Guangdong GDH Water Company Limited, Shenzhen, People's Republic of China
| | - Zhilin Ran
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
| | - Ting Li
- Shenzhen Water Longgang Water (Group) Co., LTD., Shenzhen Institute of Information Technology, People's Republic of China
| | - Haisong Chen
- Shenzhen Water Longgang Water (Group) Co., LTD., Shenzhen Institute of Information Technology, People's Republic of China
| | - Wenjing Li
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
| |
Collapse
|
8
|
Rezania N, Hasani Zonoozi M, Saadatpour M. Coagulation-flocculation of turbid water using graphene oxide: simulation through response surface methodology and process characterization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:14812-14827. [PMID: 33216297 DOI: 10.1007/s11356-020-11625-y] [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: 03/06/2020] [Accepted: 11/09/2020] [Indexed: 06/11/2023]
Abstract
It was aimed to precisely investigate the coagulation properties of graphene oxide (GO) as a novel coagulant for turbidity removal from water. For this purpose, the process was simulated through response surface methodology (RSM) to determine the effect of the preselected independent factors (pH, GO dosage, and initial turbidity) and their interaction effects on the process. Based on the results, increased turbidity removal efficiencies were obtained as pH decreased from 10 to 3. Besides, increase of GO dosage within the test range (2.5-30 mg/L) was highly beneficial for enhancing the process performance. However, a slight overdosing of GO was observed for dosages of more than 20 mg/L under pH values of less than about 4. For initial turbidity with test range of 25-300 NTU, there was an optimum range (approximately 120-200 NTU) out of which the removal efficiency declined. According to the results of the analysis of variance (ANOVA), pH and GO dosage, orderly, had the strongest individual effect on the process performance. The most significant interaction effect was also observed between pH and GO dosage. The optimal coagulation conditions with GO dosage of 4.0 mg/L, pH of 3.0, and initial turbidity of 193.34 NTU led to a turbidity removal efficiency of about 98.3%, which was in good agreement with RSM results. Under basic pH levels, the sweeping effect was recognized as the main coagulation mechanism occurred between the negatively surface charged particles of GO and soil. However, according to zeta potential (ZP) analysis results, under acidic pH conditions in addition to the sweep coagulation, the electric double layer compression, and the subsequent ZP reduction also contributed significantly to the process. Scanning electron microscopy (SEM) images showed that the layered structure of GO particles provided an appropriate platform on which the flocs were formed.
Collapse
Affiliation(s)
- Nazila Rezania
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran
| | - Maryam Hasani Zonoozi
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| | - Motahareh Saadatpour
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran
| |
Collapse
|
9
|
Wang Y, Geng Q, Yang J, Liu Y, Liu C. Hybrid System of Flocculation-Photocatalysis for the Decolorization of Crystal Violet, Reactive Red X-3B, and Acid Orange II Dye. ACS OMEGA 2020; 5:31137-31145. [PMID: 33324822 PMCID: PMC7726949 DOI: 10.1021/acsomega.0c04285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/21/2020] [Indexed: 05/12/2023]
Abstract
A hybrid system of flocculation-photocatalysis (HSFP) was applied to evaluate the color removal from simulative dye wastewater. The decolorization performance of HSFP was investigated considering four key factors: flocculant dosage, pH, turbidity, and ionic strength. Compared with flocculation alone, HSFP showed better decolorization effectiveness for simulative Crystal Violet-Reactive Red X-3B dye wastewater (CV-RR) and simulative Crystal Violet-Acid Orange II dye wastewater (CV-AO). The dosage of flocculant was determined by the molecular structure of target dyes. A higher dosage was required for the color removal of dyes with a lower molecular weight and less sulfonic acid groups. The dominant decolorization mechanism was different with different initial pH values of simulative dye wastewater, which influenced the decolorization efficiency of flocculation and photocatalysis. For dyes with a lower molecular weight and less sulfonic acid groups, better decolorization performance was achieved under neutral conditions, mainly depending on strong charge neutralization and adsorption bridging capacity. For dyes with a higher molecular weight and more sulfonic acid groups, decolorization efficiency was improved with an increase in pH, due to stronger deprotonation. An increase of turbidity reduced the dye removal efficiency of flocculation alone and HSFP. The presence of NaCl, CuCl2, and CrCl3 led to a different decrease in the flocculation efficiency and photodegradation efficiency.
Collapse
Affiliation(s)
- Yuanfang Wang
- Department
of Chemistry-Chemical & Environment Engineering, Weifang University, Weifang 261061, P. R. China
| | - Qijin Geng
- Department
of Chemistry-Chemical & Environment Engineering, Weifang University, Weifang 261061, P. R. China
| | - Jinmei Yang
- Department
of Chemistry-Chemical & Environment Engineering, Weifang University, Weifang 261061, P. R. China
| | - Ying Liu
- Department
of Chemistry-Chemical & Environment Engineering, Weifang University, Weifang 261061, P. R. China
| | - Chen Liu
- School
of Environmental Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| |
Collapse
|
10
|
de Souza PR, do Carmo Ribeiro TM, Lôbo AP, Tokumoto MS, de Jesus RM, Lôbo IP. Removal of bromophenol blue anionic dye from water using a modified exuviae of Hermetia illucens larvae as biosorbent. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:197. [PMID: 32100128 DOI: 10.1007/s10661-020-8110-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Organic dyes originating from liquid effluents from the textile industries are harmful to the environment. They are toxic and reduce the penetration of light into aquatic environments. In this study, a biosorbent was produced from the exuviae of Hermetia illucens (Linnaeus) larvae and used to remove organic anionic dyes from an aqueous medium. The solids were characterized in terms of thermal stability, chemical structure, morphology, and porosity using thermogravimetric (TGA), differential thermal analysis (DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and N2 adsorption-desorption. There were studied the effects of pH and dosage of the adsorbent on the adsorption of the bromophenol blue dye, used as a model molecule. The adsorption kinetics was studied with Lagergren's pseudo-first-order rate model. The maximum adsorbed amount was 571 mg g-1 according to Langmuir's model. The adsorption process was evaluated as exothermic and spontaneous and was classified as physical adsorption. The prepared biosorbent was tested in five consecutive adsorption cycles achieving 99% dye removal at each stage. This demonstrated the maintenance of adsorption efficiency and desorption capacity. These results suggest that prepared biosorbent have potential applications in the treatment of effluents from textile industries.
Collapse
Affiliation(s)
- Pablo Rodrigues de Souza
- Bioenergy and Environment Group, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil
| | | | - Ailton Pinheiro Lôbo
- Bioenergy and Environment Group, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil
| | - Miriam Sanae Tokumoto
- Bioenergy and Environment Group, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil
| | - Raildo Mota de Jesus
- Research Group on Analytical Chemistry of Southern Bahia, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil
| | - Ivon Pinheiro Lôbo
- Bioenergy and Environment Group, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil.
- Research Group on Analytical Chemistry of Southern Bahia, State University of Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil.
| |
Collapse
|
11
|
Jasper EE, Ajibola VO, Agbaji EB, Onwuka JC. Optimization of the preparation of Millettia thonningii seed pods activated carbon for use in the remediation of dye-contaminated aqueous solutions. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1361-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
12
|
Immobilized Microbial Catalytic Oxidation Preparation and Application of Biopolymeric Ferric Sulfate. J CHEM-NY 2019. [DOI: 10.1155/2019/3967370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A novel inorganic polymer flocculant, biopolymeric ferric sulfate (BPFS), was prepared by immobilization technology of microorganisms and by oxidation of ferrous sulfate using domestic Thiobacillus ferrooxidans (T. f) under acidic condition. T. f was isolated on the agarose single-plate medium, which exhibited an unusual trait on the utilization of low concentration of the nitrogen source and phosphorus as the nutrient substance. Under the optimal conditions, the microorganism could grow and reproduce normally and maintain the strong catalytic oxidation activity to Fe2+. The immobilization of T. f on the polyurethane as the support matrix was investigated. Cycling batch operation was applied to the preparation of 40 kg/m3, 60 kg/m3, and 80 kg/m3 BPFS when the optimal conditions are pH value of 1.8, circulation flow rate of 0.28–0.30 L/h, and reaction temperature of 28 ± 1°C. When the prepared BPFS and SPFS (solid biopolymeric ferric sulfate) were used to dispose Songhua River water, the removal rate of turbidity and CODMn of BPFS was slightly better than that of SPFS. The removal efficiencies of turbidity and CODMn by BPFS could reach 93.9% and 79.7%, respectively. The result suggests that the BPFS has good flocculating activity.
Collapse
|
13
|
Optimization of Extraction Technology of Majun Mupakhi Ela and its Effect on Hydrocortisone-induced Kidney Yang Deficiency in Mice. Sci Rep 2019; 9:4628. [PMID: 30874604 PMCID: PMC6420599 DOI: 10.1038/s41598-019-41006-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 02/07/2019] [Indexed: 11/09/2022] Open
Abstract
We used Box-Behnken design-based (BBD) response surface methodology (RSM) in this research to optimize the extraction process of Traditional medicine Majun Mupakhi Ela (MME) and evaluate its effect on hydrocortisone-induced kidney yang deficiency. Three independent parameters were applied to evaluate the maximum phosphodiesterase type 5 (PDE5) inhibition activity of MME extracts in vitro. The optimal processing conditions (extraction time 2 h, solid-liquid ratio 1:16, extraction once) gave a maximum PDE5 inhibition rate of 84.10%, flavonoid content of 0.49 mg/ml, icariin content of 0.028 mg/ml and targeted extraction yield of 26.50%. In animal experiments, MME extracts significantly increased the adrenal mass index, semen weight index, preputial gland weight index, and penis weight index in mice; in the middle and high dose group, the level of serum testosterone increased by 7664.29% and 14207.14% respectively, compared with the model group, and the level of PDE5 decreased by 67.22% and 74.69% respectively compared with the control group. These results indicate that MME has a significant positive effect on the hypothalamus-pituitary-gonadal axis, improve mating ability and not only has inhibits PDE5 activity but also significantly inhibits the expression of PDE5 in penile tissues, potential to become erectile dysfunction (ED) therapies for the clinical management of patients with kidney yang deficiency.
Collapse
|
14
|
Fang X, Wang L, Poon CS, Baek K, Tsang DCW, Kwok SK. Transforming waterworks sludge into controlled low-strength material: Bench-scale optimization and field test validation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 232:254-263. [PMID: 30476687 DOI: 10.1016/j.jenvman.2018.11.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 11/03/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
In order to reduce landfill disposal of waterworks sludge (alum sludge) and incinerated sewage sludge ash (ISSA), this study proposed an innovative approach for upcycling them into value-added controlled low-strength materials (CLSM). Waterworks sludge interfered with cement hydration reaction and delayed the stiffening time of CLSM (>10 h) due to its high organics content (5%). The addition of triethanolamine (TEA) with a dosage of 0.1 wt% of binder effectively shortened the stiffening time to 4.5 h. The lab-scale results suggested that the optimal CLSM design (6% cement, 14% ISSA, 8% sludge, and 72% recycled fine aggregate at a water/binder ratio of 1.2) complied with the standard requirement of flowability (>200 mm), stiffening time (<5 h), and compressive strength (0.3-2.1 MPa). The pilot-scale field tests further confirmed that the sludge-incorporated CLSM achieved a high flowability (220 mm), short stiffening time (4 h), low compressive strength (1.38 MPa), and easy re-excavatability after 3 months. This study demonstrated that waterworks sludge can be potentially transformed into sustainable construction materials for urban development.
Collapse
Affiliation(s)
- Xiaoliang Fang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Lei Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Chi Sun Poon
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Kitae Baek
- Department of Environmental Engineering, Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, South Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Sui Ki Kwok
- Water Supplies Department, The Government of the Hong Kong SAR, Sha Tin Government Offices, No. 1 Sheung Wo Che Road, Sha Tin, New Territories, Hong Kong, China
| |
Collapse
|
15
|
Gadekar MR, Ahammed MM. Modelling dye removal by adsorption onto water treatment residuals using combined response surface methodology-artificial neural network approach. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:241-248. [PMID: 30343219 DOI: 10.1016/j.jenvman.2018.10.017] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 09/28/2018] [Accepted: 10/06/2018] [Indexed: 05/09/2023]
Abstract
In this study, response surface methodology (RSM)-artificial neural network (ANN) approach was used to optimise/model disperse dye removal by adsorption using water treatment residuals (WTR). RSM was first applied to evaluate the process using three controllable operating parameters, namely WTR dose, initial pH (pHinitial) and dye concentration, and optimal conditions for colour removal were determined. In the second step, the experimental results of the design data of RSM were used to train the neural network along with a non-controllable parameter, the final pH (pHfinal). The trained neural networks were used for predicting the colour removal. A colour removal of 52.6 ± 2.0% obtained experimentally at optimised conditions (pHinitial 3.0, adsorbent dose 30 g/L and dye concentration 75 mg/L) was comparable to 52.0% and 52.2% predicted by RSM and RSM-ANN, respectively. This study thus shows that optimising/predicting the colour removal process using the RSM-ANN approach is possible, and it also indicates that adsorption onto WTR could be used as a primary treatment for removal of colour from dye wastewater.
Collapse
Affiliation(s)
- Mahesh R Gadekar
- Civil Engineering Department, SV National Institute of Technology, Surat, 395007, India
| | - M Mansoor Ahammed
- Civil Engineering Department, SV National Institute of Technology, Surat, 395007, India.
| |
Collapse
|
16
|
Karimifard S, Alavi Moghaddam MR. Application of response surface methodology in physicochemical removal of dyes from wastewater: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:772-797. [PMID: 30021324 DOI: 10.1016/j.scitotenv.2018.05.355] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 05/27/2018] [Accepted: 05/28/2018] [Indexed: 05/22/2023]
Abstract
Response surface methodology (RSM) is a powerful tool in designing the experiments and optimizing different environmental processes. However, when it comes to wastewater treatment and specifically dye-containing wastewater, two questions arise; "Is RSM being used correctly?" and "Are all capabilities of RSM being exploited properly?". The current review paper aims to answer these questions by scrutinizing different physicochemical processes that utilized RSM in dye removal. The literature that applied RSM to adsorption, advanced oxidation processes, coagulation/flocculation and electrocoagulation processes were critically reviewed in this paper. The common errors in applying RSM to physicochemical removal of dyes are identified and some suggestions are made for future studies.
Collapse
Affiliation(s)
- Shahab Karimifard
- Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez St., Tehran 15875-4413, Iran; Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583, United States
| | - Mohammad Reza Alavi Moghaddam
- Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez St., Tehran 15875-4413, Iran.
| |
Collapse
|
17
|
Baharlouei A, Jalilnejad E, Sirousazar M. Fixed-bed column performance of methylene blue biosorption by Luffa cylindrica: statistical and mathematical modeling. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1460364] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Atefeh Baharlouei
- Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
| | - Elham Jalilnejad
- Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
| | - Mohammad Sirousazar
- Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
| |
Collapse
|
18
|
Wang C, Zhu G, Ren B, Zhang P, Hursthouse A. A cationic polymer enhanced PAC for the removal of dissolved aquatic organic carbon and organic nitrogen from surface waters. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chuang Wang
- Hunan Provincial Key Laboratory of Shale Gas Resource UtilizationHunan University of Science and TechnologyXiangtan411201China
- College of Civil EngineeringHunan University of Science and TechnologyXiangtan411201China
| | - Guocheng Zhu
- Hunan Provincial Key Laboratory of Shale Gas Resource UtilizationHunan University of Science and TechnologyXiangtan411201China
- College of Civil EngineeringHunan University of Science and TechnologyXiangtan411201China
- School of Resource Environment and Safety EngineeringHunan University of Science and TechnologyXiangtan411201China
| | - Bozhi Ren
- Hunan Provincial Key Laboratory of Shale Gas Resource UtilizationHunan University of Science and TechnologyXiangtan411201China
- College of Civil EngineeringHunan University of Science and TechnologyXiangtan411201China
| | - Peng Zhang
- College of Civil EngineeringHunan University of Science and TechnologyXiangtan411201China
| | - Andrew Hursthouse
- Hunan Provincial Key Laboratory of Shale Gas Resource UtilizationHunan University of Science and TechnologyXiangtan411201China
- College of Civil EngineeringHunan University of Science and TechnologyXiangtan411201China
- School of Science & SportUniversity of the West of ScotlandPaisleyPA1 2BEUK
| |
Collapse
|
19
|
|
20
|
Chen W, Gao X, Xu H, Wang K, Chen T. Preparation of modified waterworks sludge particles as adsorbent to enhance coagulation of slightly polluted source water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:19393-19401. [PMID: 28674956 DOI: 10.1007/s11356-017-9563-7] [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: 03/19/2017] [Accepted: 06/14/2017] [Indexed: 06/07/2023]
Abstract
Without treatment, waterworks sludge is ineffective as an adsorbent. In this study, raw waterworks sludge was used as the raw material to prepare modified sludge particles through high-temperature calcination and alkali modification. The feasibility of using a combination of modified particles and polyaluminum chloride (PAC) as a coagulant for treatment of slightly polluted source water was also investigated. The composition, structure, and surface properties of the modified particles were characterized, and their capabilities for removing ammonia nitrogen and turbidity were determined. The results indicate that the optimal preparation conditions for the modified sludge particles were achieved by preparing the particles with a roasting temperature of 483.12 °C, a roasting time of 3.32 h, and a lye concentration of 3.75%. Furthermore, enhanced coagulation is strengthened with the addition of modified sludge particles, which is reflected by reduction of the required PAC dose and enhancement of the removal efficiency of ammonia nitrogen and turbidity by over 80 and 93%, respectively. Additional factors such as pH, temperature, dose, and dosing sequence were also evaluated. The optimum doses of modified particles and PAC were 40 and 15 mg/L, respectively, and adding modified particles at the same time as or prior to adding PAC improves removal efficiency.
Collapse
Affiliation(s)
- Wei Chen
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Hohai University, Nanjing, 210098, China
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Xiaohong Gao
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Hang Xu
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Hohai University, Nanjing, 210098, China.
- College of Environment, Hohai University, Nanjing, 210098, China.
| | - Kang Wang
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Taoyuan Chen
- College of Environment, Hohai University, Nanjing, 210098, China
| |
Collapse
|
21
|
Modified natural zeolite using ammonium quaternary based material for Acid red 18 removal from aqueous solution. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2017. [DOI: 10.1016/j.jece.2017.06.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
22
|
Zhu G, Wang C, Dong X. Fluorescence excitation-emission matrix spectroscopy analysis of landfill leachate DOM in coagulation-flocculation process. ENVIRONMENTAL TECHNOLOGY 2017; 38:1489-1497. [PMID: 27609652 DOI: 10.1080/09593330.2016.1234510] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 09/04/2016] [Indexed: 06/06/2023]
Abstract
Landfill leachate contains a variety of organic matters, some of which can be excited and emit fluorescence signal. In order to degrade these organic matters, the pretreatment of the leachate is needed, which can improve the degradation performance of post-treatment process. Coagulation-flocculation is one of the important pretreatment processes to treat landfill leachate. Assessing the chemical compositions of landfill leachate is helpful in the understanding of their sources and fates as well as the mechanistic behaviors in the water environment. The present work aimed to use fluorescence excitation-emission matrix spectroscopy (EEMs) to characterize the chemical fractions of landfill leachate dissolved organic matter (DOM) in conjunction with parallel factor analysis (PARAFAC). Results showed that the DOM of landfill leachate tested in this study was identified resulting from microbial input, which included five typical characteristic peaks and four kinds of PARAFAC fractions. These fractions were mainly composed of hydrophobic macromolecule humic acid-like (HM-HA), hydrophilic intermediate molecular fulvic acid-like (HIM-FA), and hydrophilic small molecule protein-like substances (HSM-PS). HM-HA and HIM-FA were found to be easier to remove than HSM-PS. Further research on HSM-PS removal by coagulation-flocculation still needs to be improved.
Collapse
Affiliation(s)
- Guocheng Zhu
- a College of Civil Engineering , Hunan University of Science & Technology , Xiangtan , People's Republic of China
| | - Chuang Wang
- a College of Civil Engineering , Hunan University of Science & Technology , Xiangtan , People's Republic of China
| | - Xingwei Dong
- b Huajie Environmental Protection Engineering Co., Ltd. , Yibin , People's Republic of China
| |
Collapse
|
23
|
Amirian P, Bazrafshan E, Payandeh A. Optimisation of chemical oxygen demand removal from landfill leachate by sonocatalytic degradation in the presence of cupric oxide nanoparticles. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2017; 35:636-646. [PMID: 28486846 DOI: 10.1177/0734242x17704715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Leachate is the liquid formed when waste breaks down in the landfill and water filters through that waste. This liquid is very toxic and can pollute the land, ground water, and water resources. In most countries, it is mandatory for landfills to be protected against leachate. In addition to all other harms to the environment, disposal of raw landfill leachate can be a major source of hazard to closed water bodies. Hence, treatment of landfill leachate is considered an essential step prior to its discharge from source. This article describes the sonocatalytic degradation of chemical oxygen demand in landfill leachate using cupric oxide nanoparticles as sonocatalyst (cupric oxide/ultrasonic) and aims to establish this method as an effective alternative to currently used approaches. An ideal experimental design was carried out based on a central composite design with response surface methodology. The response surface methodology was used to evaluate the effect of process variables including pH values (3, 7, 11), cupric oxide nanoparticles dose (0.02, 0.035, 0.05 g), reaction time (10, 35, 60 minutes), ultrasonic frequency (35, 37, 130 KHz), and their interaction towards the attainment of their optimum conditions. The derived second-order model, including both significant linear and quadratic terms, seemed to be adequate in predicting responses (R2 = 0.9684 and prediction R2 = 0.9581). The optimum conditions for the maximum chemical oxygen demand sonocatalytic degradation of 85.82% were found to be pH 6.9, cupric oxide nanoparticles dosage of 0.05 gr L-1, and the ultrasonic frequency of 130 kHz at a contact time of 10 min.
Collapse
Affiliation(s)
- Paria Amirian
- Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Edris Bazrafshan
- Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Abolfazl Payandeh
- Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| |
Collapse
|
24
|
Poormand H, Leili M, Khazaei M. Adsorption of methylene blue from aqueous solutions using water treatment sludge modified with sodium alginate as a low cost adsorbent. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:281-295. [PMID: 28112655 DOI: 10.2166/wst.2016.510] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this research, aluminum-based drinking water treatment sludge is used as a starting material and immobilized by sodium alginate to develop low cost adsorbent for the removal of methylene blue (MB) from aqueous solutions. The studied variables included pH, adsorbent dose, initial MB concentration and contact time. Characteristics of the adsorbent were also studied using scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR). It was revealed from kinetic tests that removal efficiency of MB was 88.5% under the optimum conditions of pH 8, initial MB concentration of 50 mg/L, contact time of 60 min, and adsorbent dose of 0.3 g/L. The oxygen functional groups such as -OH, C-O-C and C=O were found on the surface of developed adsorbent by FTIR. In addition, the adsorption data fitted well the Langmuir adsorption model with the maximum sorption capacity of 909.1 mg/g, and followed the pseudo-second-order kinetics. Findings of this study indicate that the prepared adsorbent is promising for further development of an effective and economical adsorbent material in the near future.
Collapse
Affiliation(s)
- Hamid Poormand
- Department of Environmental Health Engineering, Students Research Center, Hamadan University of Medical Sciences, Hamadan, Iran and School of Public Health, Hamadan University of Medical Sciences, Shahid Fahmideh Avenue, P.O. Box 65175-417, Hamadan, Iran E-mail:
| | - Mostafa Leili
- Department of Environmental Health Engineering, Students Research Center, Hamadan University of Medical Sciences, Hamadan, Iran and School of Public Health, Hamadan University of Medical Sciences, Shahid Fahmideh Avenue, P.O. Box 65175-417, Hamadan, Iran E-mail:
| | - Marzieh Khazaei
- Young Researchers and Elite Club, Qom Branch, Islamic Azad University, Qom, Iran and Department of Chemical Engineering, Faculty of Chemistry, Bu-Ali Sina University, P.O. Box 6517838695, Hamadan, Iran
| |
Collapse
|
25
|
Samarghandi MR, Khiadani M, Foroughi M, Zolghadr Nasab H. Defluoridation of water using activated alumina in presence of natural organic matter via response surface methodology. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:887-897. [PMID: 26347418 DOI: 10.1007/s11356-015-5293-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 08/20/2015] [Indexed: 06/05/2023]
Abstract
Adsorption by activated alumina is considered to be one of the most practiced methods for defluoridation of freshwater. This study was conducted, therefore, to investigate the effect of natural organic matters (NOMs) on the removal of fluoride by activated alumina using response surface methodology. To the authors' knowledge, this has not been previously investigated. Physico-chemical characterization of the alumina was determined by scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF), and X-ray diffractometer (XRD). Response surface methodology (RSM) was applied to evaluate the effect of single and combined parameters on the independent variables such as the initial concentration of fluoride, NOMs, and pH on the process. The results revealed that while presence of NOM and increase of pH enhance fluoride adsorption on the activated alumina, initial concentration of fluoride has an adverse effect on the efficiency. The experimental data were analyzed and found to be accurately and reliably fitted to a second-order polynomial model. Under optimum removal condition (fluoride concentration 20 mg/L, NOM concentration 20 mg/L, and pH 7) with a desirability value of 0.93 and fluoride removal efficiency of 80.6%, no significant difference was noticed with the previously reported sequence of the co-exiting ion affinity to activated alumina for fluoride removal. Moreover, aluminum residual was found to be below the recommended value by the guideline for drinking water. Also, the increase of fluoride adsorption on the activated alumina, as NOM concentrations increase, could be due to the complexation between fluoride and adsorbed NOM. Graphical abstract ᅟ.
Collapse
Affiliation(s)
- Mohammad Reza Samarghandi
- Department of Environmental Health Engineering, School of Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mehdi Khiadani
- School of Engineering, Edith Cowan University, Joondalup, WA, 6027, Australia
- Environment Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maryam Foroughi
- Department of Environmental Health Engineering, School of Health, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Hasan Zolghadr Nasab
- Department of Environmental Health Engineering, School of Health, Hamadan University of Medical Sciences, Hamadan, Iran
| |
Collapse
|
26
|
Dasgupta J, Mondal D, Chakraborty S, Sikder J, Curcio S, Arafat HA. Nanofiltration based water reclamation from tannery effluent following coagulation pretreatment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 121:22-30. [PMID: 26188702 DOI: 10.1016/j.ecoenv.2015.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/26/2015] [Accepted: 07/03/2015] [Indexed: 06/04/2023]
Abstract
Coagulation-nanofiltration based integrated treatment scheme was employed in the present study to maximize the removal of toxic Cr(VI) species from tannery effluents. The coagulation pretreatment step using aluminium sulphate hexadecahydrate (alum) was optimized by response surface methodology (RSM). A nanofiltration unit was integrated with this coagulation pre-treatment unit and the resulting flux decline and permeate quality were investigated. Herein, the coagulation was conducted under response surface-optimized operating conditions. The hybrid process demonstrated high chromium(VI) removal efficiency over 98%. Besides, fouling of two of the tested nanofiltration membranes (NF1 and NF3) was relatively mitigated after feed pretreatment. Nanofiltration permeation fluxes as high as 80-100L/m(2)h were thereby obtained. The resulting permeate stream quality post nanofiltration (NF3) was found to be suitable for effective reuse in tanneries, keeping the Cr(VI) concentration (0.13mg/L), Biochemical Oxygen Demand (BOD) (65mg/L), Chemical Oxygen Demand (COD) (142mg/L), Total Dissolved Solids (TDS) (108mg/L), Total Solids (TS) (86mg/L) and conductivity levels (14mho/cm) in perspective. The process water reclaiming ability of nanofiltration was thereby substantiated and the effectiveness of the proposed hybrid system was thus affirmed.
Collapse
Affiliation(s)
- J Dasgupta
- Department of Chemical Engineering, National Institute of Technology Durgapur, West Bengal 713209, India
| | - D Mondal
- Department of Chemical Engineering, National Institute of Technology Durgapur, West Bengal 713209, India
| | - S Chakraborty
- Department of Informatics, Modeling, Electronics and Systems Engineering, University of Calabria, Via P. Bucci, Cubo-42a, 87036 Rende, CS, Italy
| | - J Sikder
- Department of Chemical Engineering, National Institute of Technology Durgapur, West Bengal 713209, India.
| | - S Curcio
- Department of Informatics, Modeling, Electronics and Systems Engineering, University of Calabria, Via P. Bucci, Cubo-42a, 87036 Rende, CS, Italy
| | - H A Arafat
- Institute Center for Water and Environment (iWater), Department of Chemical and Environmental Engineering, Masdar Institute of Science and Technology, PO Box 54224, Abu Dhabi, United Arab Emirates
| |
Collapse
|
27
|
Ahmad A, Mohd-Setapar SH, Chuong CS, Khatoon A, Wani WA, Kumar R, Rafatullah M. Recent advances in new generation dye removal technologies: novel search for approaches to reprocess wastewater. RSC Adv 2015. [DOI: 10.1039/c4ra16959j] [Citation(s) in RCA: 606] [Impact Index Per Article: 67.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In order to control the negative impacts of dyes on living organisms, several techniques and methodologies have been developed for their removal from industry effluents and other water bodies.
Collapse
Affiliation(s)
- Akil Ahmad
- Centre of Lipids Engineering and Applied Research (CLEAR)
- Universiti Teknologi Malaysia
- Malaysia
| | - Siti Hamidah Mohd-Setapar
- Centre of Lipids Engineering and Applied Research (CLEAR)
- Universiti Teknologi Malaysia
- Malaysia
- Faculty of Chemical Engineering
- Universiti Teknologi Malaysia
| | - Chuo Sing Chuong
- Centre of Lipids Engineering and Applied Research (CLEAR)
- Universiti Teknologi Malaysia
- Malaysia
| | - Asma Khatoon
- Centre of Lipids Engineering and Applied Research (CLEAR)
- Universiti Teknologi Malaysia
- Malaysia
| | - Waseem A. Wani
- Institute of Bioproduct Development
- Universiti Teknologi Malaysia
- Malaysia
| | - Rajeev Kumar
- Department of Environmental Sciences
- Faculty of Meteorology
- Environment and Arid Land Agriculture
- King Abdulaziz University
- Jeddah 21589
| | - Mohd Rafatullah
- School of Industrial Technology
- Universiti Sains Malaysia
- Malaysia
| |
Collapse
|
28
|
Preparation and characterization of chitosan/feldspar biohybrid as an adsorbent: optimization of adsorption process via response surface modeling. ScientificWorldJournal 2014; 2014:370260. [PMID: 24587722 PMCID: PMC3920676 DOI: 10.1155/2014/370260] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 10/28/2013] [Indexed: 11/26/2022] Open
Abstract
Chitosan/feldspar biobased beads were synthesized, characterized, and tested for the removal of Acid Black 1 dye from aquatic phases. A four-factor central composite design (CCD) accompanied by response surface modeling (RSM) and optimization was used to optimize the dye adsorption by the adsorbent (chitosan/feldspar composite) in 31 different batch experiments. Independent variables of temperature, pH, initial dye concentration, and adsorbent dose were used to change to coded values. To anticipate the responses, a quadratic model was applied. Analysis of variance (ANOVA) tested the significance of the process factors and their interactions. The adequacy of the model was investigated by the correlation between experimental and predicted data of the adsorption and the calculation of prediction errors. The results showed that the predicted maximum adsorption amount of 21.63 mg/g under the optimum conditions (pH 3, temperature 15°C, initial dye concentration 125 mg/L, and dose 0.2 g/50 mL) was close to the experimental value of 19.85 mg/g. In addition, the results of adsorption behaviors of the dye illustrated that the adsorption process followed the Langmuir isotherm model and the pseudo-second-order kinetic model. Langmuir sorption capacity was found to be 17.86 mg/g. Besides, thermodynamic parameters were evaluated and revealed that the adsorption process was exothermic and favourable.
Collapse
|
29
|
Taheri M, Moghaddam MRA, Arami M. Optimization of Acid Black 172 decolorization by electrocoagulation using response surface methodology. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2012; 9:23. [PMID: 23369574 PMCID: PMC3602069 DOI: 10.1186/1735-2746-9-23] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 12/05/2012] [Indexed: 11/16/2022]
Abstract
This paper utilizes a statistical approach, the response surface optimization methodology, to determine the optimum conditions for the Acid Black 172 dye removal efficiency from aqueous solution by electrocoagulation. The experimental parameters investigated were initial pH: 4–10; initial dye concentration: 0–600 mg/L; applied current: 0.5-3.5 A and reaction time: 3–15 min. These parameters were changed at five levels according to the central composite design to evaluate their effects on decolorization through analysis of variance. High R2 value of 94.48% shows a high correlation between the experimental and predicted values and expresses that the second-order regression model is acceptable for Acid Black 172 dye removal efficiency. It was also found that some interactions and squares influenced the electrocoagulation performance as well as the selected parameters. Optimum dye removal efficiency of 90.4% was observed experimentally at initial pH of 7, initial dye concentration of 300 mg/L, applied current of 2 A and reaction time of 9.16 min, which is close to model predicted (90%) result.
Collapse
Affiliation(s)
- Mahsa Taheri
- Associate Professor, Civil and Environmental Engineering Department, Amirkabir University of Technology, Tehran, Iran.
| | | | | |
Collapse
|
30
|
Treatment of Direct Blending Dye Wastewater and Recycling of Dye Sludge. Molecules 2012; 17:2784-95. [PMID: 22395407 PMCID: PMC6268578 DOI: 10.3390/molecules17032784] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/13/2012] [Accepted: 02/29/2012] [Indexed: 11/17/2022] Open
|
31
|
Kayan B, Gözmen B. Degradation of Acid Red 274 using H2O2 in subcritical water: application of response surface methodology. JOURNAL OF HAZARDOUS MATERIALS 2012; 201-202:100-106. [PMID: 22169144 DOI: 10.1016/j.jhazmat.2011.11.045] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 10/31/2011] [Accepted: 11/13/2011] [Indexed: 05/31/2023]
Abstract
In this research, the degradation of Acid Red 274 (AR 274) was investigated under subcritical water conditions using H(2)O(2), which led to the oxidative degradation of Acid Red 274 up to its 80% of mineralization. The Box-Behnken design matrix and response surface methodology (RSM) were applied in designing the experiments for evaluating the interactive effects of the three most important operating variables. Thus, the interactive effects of temperature (100-250°C), oxidant (H(2)O(2)) concentration (50-250 mM), and time (30-60 min.) on the degradation of AR 274 were investigated. A total of 17 experiments were conducted in this research, and the analysis of variance (ANOVA) indicated that the proposed quadratic model could be used for navigating the design space. The proposed model was essentially in accordance with the experimental case with correlation coefficient R(2)=0.9930 and Adj-R(2)=0.9839, respectively. The results confirmed that RSM based on the Box-Behnken design was a compatible method for optimizing the operating conditions of AR 274 degradation.
Collapse
Affiliation(s)
- Berkant Kayan
- Department of Chemistry, Arts and Sciences Faculty, Aksaray University, Aksaray, Turkey.
| | | |
Collapse
|
32
|
Application of response surface methodology and central composite design for the optimization of textile dye degradation by wet air oxidation. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2012. [DOI: 10.1186/2228-5547-3-24] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|