1
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Kaarmukhilnilavan RS, Wong JWC, Murugesan K. Treatment of polluted river water using potential bioflocculant produced by Klebsiella pneumonia UKD24. ENVIRONMENTAL TECHNOLOGY 2024:1-10. [PMID: 38442742 DOI: 10.1080/09593330.2024.2323553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 01/21/2024] [Indexed: 03/07/2024]
Abstract
Chemically enhanced primary treatment (CEPT) is a rapid wastewater treatment process involving treating wastewater with two chemical-aided processes, coagulation, and flocculation. In the present study, a natural extracellular polymeric substance flocculant (EPSBF) produced by Klebsiella pneumonia UKD24, a bacterium isolated from the sewage treatment plant, and a synthetic polyacrylamide anionic polymer flocculant (PAM) were evaluated to treat polluted river water. The synthetic PAM showed immediate turbidity reduction after agitation, while the EPSBF expressed a rapid decrease in optical density. After 20 min of the settling period, the EPSBF showed reduced rates of turbidity, optical density, and chemical oxygen demand at 74.14 ± 5.2%, 89.37 ± 0.76%, and 87.21 ± 0.73%, respectively, while PAM showed 67.08 ± 4%, 85.68 ± 2%, and 86.57 ± 2%, respectively. EPSBF treatment significantly improved the water quality parameters in terms of total dissolved solids, total suspended solids, conductivity, and oxidation-reduction potential than PAM treatment. However, the EPSBF has shown a more water-holding capacity and relatively weak flock formation, producing more sludge volume than PAM. Furthermore, though the sludge produced by the EPSBF treatment had a higher moisture content, it showed shorter capillary suction time (CST). In contrast, sludge formed in PAM treatment had lower moisture content, but it exhibited prolonged CST value indicating that PAM treatment sludge showed slow dewaterability.
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Affiliation(s)
- R S Kaarmukhilnilavan
- Department of Environmental Science, School of Environmental Science and Technology, Periyar University, Salem, India
| | - J W C Wong
- Institute of Bioresource and Agriculture, Hong Kong Baptist University, Hong Kong, People's Republic of China
| | - K Murugesan
- Department of Environmental Science, School of Environmental Science and Technology, Periyar University, Salem, India
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2
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Yuan H, Zhu N. Progress of improving waste activated sludge dewaterability: Influence factors, conditioning technologies and implications and perspectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168605. [PMID: 37989393 DOI: 10.1016/j.scitotenv.2023.168605] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 11/06/2023] [Accepted: 11/14/2023] [Indexed: 11/23/2023]
Abstract
Large amounts of waste activated sludge (WAS) as a by-product generated from the biological treatment in wastewater treatment plants (WWTPs) is of high moisture content (MC), organic pollutants, heavy metals and pathogenic bacteria, it may cause serious environmental ecological risk without appropriate disposal. More than one half of the total operation cost is accounted for sludge disposal in a WWTP. Dewatering is an essential and important step during the sludge treatment and disposal process for it could efficiently reduce its volume, and be beneficial to the subsequent treatment and disposal of sludge. However, sludge should be conditioned before mechanical dewatering because of its high hydrophilicity. In this work, it presented a comprehensive review on sludge dewatering including summarizing the dewaterability measurement indexes, affecting factors, conditioning technologies, the improvement mechanisms. Finally, based on the eventual disposal and low carbon emission target, the implications and perspectives development of sludge conditioning were discussed. Based on the above discussion, there is no unified theoretical insight of the improvement mechanism of sludge dewaterability. In addition, the relationship between the microstructure of organic matters in sludge floc and the dewaterability should be deepened. Especially, how to choose the optimal conditioning technology for sludge dewatering lies in the physical and chemical properties of sludge, however, the carbon emission of the conditioning and dewatering process also needs to be considered. Accordingly, green, low-cost and organic conditioning agents are the direction of future research, and the establishment of automatic operating system and real-time evaluation index system is the key challenge.
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Affiliation(s)
- Haiping Yuan
- Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science and Engineering, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai 200240, China
| | - Nanwen Zhu
- Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science and Engineering, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai 200240, China.
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3
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Zhang B, Tang X, Xu Q, Fan C, Gao Y, Li S, Wang M, Li C. Anionic polyacrylamide alleviates cadmium inhibition on anaerobic digestion of waste activated sludge. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 17:100306. [PMID: 37701857 PMCID: PMC10494310 DOI: 10.1016/j.ese.2023.100306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 07/17/2023] [Accepted: 07/22/2023] [Indexed: 09/14/2023]
Abstract
The uncontrolled discharge of industrial wastewater leads to a significant cadmium (Cd) accumulation in waste activated sludge (WAS), posing a serious threat to the steady operation of the anaerobic digestion (AD) system in wastewater treatment plants (WWTPs). Therefore, developing a viable approach to cope with the adverse effects of high-concentration Cd on the AD system is urgently required. This study aims to investigate the potential of using anionic polyacrylamide (APAM), a commonly used agent in WWTPs, to mitigate the adverse effects of Cd in a toxic amount (i.e., 5.0 mg per g total suspended solids (TSS)) on AD of WAS. The results showed that the effectiveness of higher APAM on Cd toxicity alleviation was less than that of lower APAM at the studied level (i.e., the effectiveness order was 1.5 mg APAM per g TSS > 3.0 mg APAM per g TSS > 6.0 mg APAM per g TSS). The moderate supplement of APAM (i.e., 1.5 mg per g TSS) recovered the accumulative methane yield from 190.5 ± 3.6 to 228.9 ± 4.1 mL per g volatile solids by promoting solubilization, hydrolysis, and acidification processes related to methane production. The application of APAM also increased the abundance of key microbes in the AD system, especially Methanolinea among methanogens and Caldilineaceae among hydrolyzers. Furthermore, APAM facilitated the key enzyme activities involved in AD processes and reduced reactive oxygen species (induced by Cd) production via adsorption/enmeshment of Cd by APAM. These findings demonstrate the feasibility of using moderate APAM to mitigate Cd toxicity during AD, providing a promising solution for controlling Cd or other heavy metal toxicity in WWTPs.
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Affiliation(s)
- Baowei Zhang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xiang Tang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Changzheng Fan
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Yuying Gao
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Shuang Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Mier Wang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Chao Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
- College of Mechanical & Electrical Engineering, Hunan Agricultural University, Changsha, 410128, PR China
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4
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Zhi C, Zhang Y, Tian Y, Qi J, Yang Y, Wang L, Wu Y, Lu H. pH-Switchable W/O Polymer Emulsion: A Promising Strategy for Rapid Dissolution of Drag Reducers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13976-13985. [PMID: 37729158 DOI: 10.1021/acs.langmuir.3c01672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Additional hydrophilic surfactants are generally introduced into W/O emulsion drag reducer systems to enhance the dissolution capacity of polymers. The hydrophilic surfactants may decrease the stability of W/O emulsion, which leads to deterioration of polymer emulsions in the storage and transport process instead. Herein, a pH-switchable surfactant, N-(2-morpholinoethyl) oleamide (NMEO) was designed for stabilizing a W/O emulsion drag reducer. The surface activity and solubility changes occurring at pH < 6 of NMEO guaranteed the phase inversion from W/O to O/W of emulsions upon pH stimulation. Based on optimal conditions (oil-water ratio of 0.429, NMEO concentration of 3 wt%, and pH of 6.5), the inverse emulsion polymerization of poly(acrylamide-co-acrylic acid-co-2-acrylamide-2-methylpropane sulfonic acid) was proceeded to obtain a W/O polymer emulsion with the pH-switchable behavior. It was demonstrated that the polymer emulsions were provided with prolonged storage stability by NMEO and could be stored for at least 30 days due to the absence of hydrophilic surfactants. The polymers were released and completely dissolved within 2.5 min by pH stimulation, compared with traditional emulsion polymers and powder polymers that require 4 and 17 min, respectively. In addition, the emulsion drag reducer prepared by NMEO provided drag-reduction performance of 64.67% at 0.021 wt% concentration. The pH-switchable behavior of NMEO promotes the validity of W/O polymer emulsions along with the capacity of rapid release and solubilization, which eliminates the imbalance between the long-term storage stability and rapid solubility of traditional drag reducers. Thus, NMEO-stabilized emulsion drag reducers are expected to be a promising alternative for traditional products.
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Affiliation(s)
- Caifu Zhi
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yong Zhang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yun Tian
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Jie Qi
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yang Yang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Li Wang
- College of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yuanpeng Wu
- College of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemical, Ministry of Education, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
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5
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Faridi S, Mobinikhaledi A, Moghanian H, Shabanian M. Synthesis of novel modified acrylamide copolymers for montmorillonite flocculants in water-based drilling fluid. BMC Chem 2023; 17:125. [PMID: 37743464 PMCID: PMC10518104 DOI: 10.1186/s13065-023-01042-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 09/15/2023] [Indexed: 09/26/2023] Open
Abstract
A study was conducted to treat the water-based drilling fluid through coagulation-flocculation. Innovative modified acrylamide copolymers were utilized as montmorillonite flocculants to improve drilling performance and reduce environmental contamination. A series of acrylamide copolymers was prepared by in situ free radical polymerization in aqueous medium using ammonium persulfate as a radical initiator. The chemical structure of the prepared copolymers was confirmed by FT-IR (Fourier-Transform Infrared Spectroscopy) and the polydispersity indices of the copolymers determined using gel permeation chromatography. Thermal gravimetric analysis showed that the copolymers have a very high temperature tolerance, i.e. they are stable up to 390 °C. In this paper, acrylamide copolymers were used as coagulant with cationic, anionic groups or both of them simultaneously. Consequently, in order to clarify the relationship between inhibitive properties, sedimentation volume measurement, SEM (scanning electron microscope), XRD (X-ray diffraction) and contact angle were adopted. Some factors including molecular weight and molecular chain affecting the interaction between copolymers and clay particles were analyzed. Anionic sample with the highest molecular weight can reduce the interlayer spacing of the hydrated clay to the minimum. Amphoteric sample exhibits the best performance as a coagulant in comparison with other copolymers.
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Affiliation(s)
- Shirin Faridi
- Department of Chemistry, Faculty of Science, Arak University, Arak, Iran
| | | | - Hassan Moghanian
- Materials and Energy Research Center, Dezful Branch, Islamic Azad University, Dezful, Iran
| | - Meisam Shabanian
- Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran
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6
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New insights into the interaction between monomers from acrylamide-based polymeric flocculants and montmorillonite: A DFT study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Kang S, Liu W, Wang Y, Wang Y, Wu S, Chen S, Yan B, Lan X. Starch-derived flocculant with hyperbranched brush architecture for effectively flocculating organic dyes, heavy metals and antibiotics. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Feng J, Zheng L, Wu X, Wu J, Yu Y, Li L, Li M. Preparation and characterization of polymer retarder for plugging cement slurry. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2066001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jie Feng
- China University of Petroleum, Beijing, Beijing, China
- China National Petroleum Corporation Engineering Technology Research Institute Co., Ltd, Beijing, China
| | - Lihui Zheng
- China University of Petroleum, Beijing, Beijing, China
| | - Xiaoying Wu
- School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan, China
| | - Jing Wu
- School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan, China
| | - Yongjin Yu
- China National Petroleum Corporation Engineering Technology Research Institute Co., Ltd, Beijing, China
| | - Long Li
- China National Petroleum Corporation Engineering Technology Research Institute Co., Ltd, Beijing, China
| | - Ming Li
- School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan, China
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9
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Effect of Synthetic Quadripolymer on Rheological and Filtration Properties of Bentonite-Free Drilling Fluid at High Temperature. CRYSTALS 2022. [DOI: 10.3390/cryst12020257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
High temperature would dramatically worsen rheological behaviors and increase filtration loss volumes of drilling fluids. Synthetic polymers with high temperature stability have attracted more and more attention. In this paper, a novel quadripolymer was synthesized using 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylamide (AM), sodium styrene sulfonate (SSS), and dimethyl diallyl ammonium chloride (DMDAAC). Firstly, the molecular structure was studied by Fourier transform–infrared spectroscope (FT-IR) and nuclear magnetic resonance (1H-NMR) analysis. It was shown that the synthetic polymer contained all the designed functional groups. Moreover, the effect of temperature and the quadripolymer concentration on the rheological behavior and filtration loss of the bentonite-free drilling fluid were investigated. It was experimentally established that when the adding amount of the quadripolymer was 0.9 wt%, the prepared drilling fluid systems exhibited relatively stable viscosities, and the filtration losses could be controlled effectively after hot rolling aged within 180 °C. Further, it was confirmed that the bentonite-free drilling fluid containing the synthesized quadripolymer had good reservoir protection performance. In conclusion, the synthetic quadripolymer is a promising rheology modifier and a filtrate reducer for the development of the bentonite-free drilling fluid at high temperature.
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10
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Li Y, Liu Y, Wang L, Lu H. A pH-sensitive W/O emulsion for the preparation and rapid dissolution of polyacrylamide-based friction reducer. NEW J CHEM 2022. [DOI: 10.1039/d2nj00999d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pH-sensitive modified-polyacrylamide emulsion shows a fast dissolution rate with a dissolution time of about 1 min and long storage stability.
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Affiliation(s)
- Yanping Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Ya Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Li Wang
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Chengdu 610500, P. R. China
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11
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Synthesis, characterization and rheological properties of copolymer based on poly (para-isobutyl-N-Phenethyl acrylamide -Acrylamide) with drilling mud. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02531-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Feng L, Li X, Wang Z, Liu B, Chen Y, Zheng H. A microblock structure type of anionic flocculant for hematite wastewater treatment: template copolymerization mechanism and enhanced flocculation effect. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:1933-1947. [PMID: 32862344 DOI: 10.1007/s11356-020-10620-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
In this study, a novel anionic template polymer (TPAS) with microblock structure was prepared by ultraviolet light (UV)-assisted template copolymerization (UV-TP). Acrylamide (AM) and sodium styrene sulfonate (SSS) were selected as monomers and polypropylene ammonium chloride (PAAC) was chosen as the template. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), nuclear magnetic resonance hydrogen spectroscopy (1H NMR), and thermogravimetry/differential scanning calorimetry (TG/DSC) were used to characterize the polymer chemical structure. The results showed that the attractive anionic microblock structure was formed in TPAS. Besides, the association constant (KM) and template reaction kinetics analysis results indicated that the polymerization reaction followed I (ZIP) template copolymerization mechanism. It proved the microblock structure formation again. The anionic microblock structure in TPAM could greatly improve the ability of charge neutralization, electrical patching, and bridging. After the hematite wastewater was conditioned by TPAS with this novel anionic microblock structure, the generated hematite flocs had larger particle size and denser structure. It was favorable for the reduction of turbidity, and the turbidity removal rate could reach 97.8%. TPAS showed excellent flocculation performance for hematite wastewater and had a broad market application prospect.
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Affiliation(s)
- Li Feng
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China.
| | - Xuhao Li
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China
| | - Zizeng Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China
| | - Bingzhi Liu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China.
| | - Yuning Chen
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
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13
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Feng X, Deng J, Wan J, He J, Huang Z, Yan A. Preparation of a hydrophobically associated cationic polyacrylamide and its regulation of the sludge dewatering performance. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:1350-1369. [PMID: 33079715 DOI: 10.2166/wst.2020.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A hydrophobically associating cationic polyacrylamide (HACPAM) was prepared by using a micellar polymerization method with V-50 (azobisisobutyramidine hydrochloride) as the initiator and acrylamide, acryloyloxyethyl trimethylammonium chloride and butyl methacrylate as substrates under ultraviolet light irradiation. Structural analysis using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and X-ray photoelectron spectroscopy analyses showed that the substrates were successfully polymerized. HACPAM was used to condition sludge to improve its dewatering performance, and the results showed that as the amount of HACPAM increases, the sludge dewatering performance is significantly improved, and 3.532 kg/t dry solids of HACPAM is regarded as the optimal amount. Compared with the commercially available cationic polyacrylamide (CPAM), HACPAM has a stronger hydrophobic group association effect, with better promotion of the conversion of bound water in sludge flocs into free water, thereby improving the sewage dewatering performance. The 3D spatial structure of dewatered sludge cakes analyzed by computed tomography technology showed that the number of pores of the dewatered sludge cake treated by HACPAM 3 was smaller than that of the cake treated by CPAM, with a reduction in the porosity of 68.8%, resulting in a better hydrophobic effect. In addition, the mechanism of HACPAM improving the dewatering performance is discussed.
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Affiliation(s)
- Xin Feng
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Jinchuan Deng
- College of Environmental Science and Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou, China
| | - Junjie Wan
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Jinqiang He
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Zhenjun Huang
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
| | - Aoqi Yan
- Department of Eco-environmental Technology, Guangdong Industry Polytechnic, Guangzhou, China E-mail:
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14
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Zou H, Ren X, Zhang J. Fabrication of a Bi 2O 3 Surface-Modified Polyvinylidene Fluoride Membrane via an Ultraviolet Photografting Method: Improving Hydrophilicity and Degree of Acrylic Acid Grafting. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06206] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hui Zou
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xiancheng Ren
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Jing Zhang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China
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15
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Li M, Xiao W, Zhang H, Yu Y, Liu Z, Xie D. An effective salt-tolerant fluid loss additive-suitable for high temperature oil well cement. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1709494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ming Li
- School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, PR China
| | - Weiyuan Xiao
- School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, PR China
| | - Hua Zhang
- Southern Sichuan Gas Field, PetroChina Southwest Oil & Gas Field Company, Luzhou, Sichuan, China
| | - Yongjin Yu
- Engineering and Technology Research Institute Co., Ltd, China National Petroleum Corporation (CNPC), Beijing, PR China
| | - Zishuai Liu
- Engineering and Technology Research Institute Co., Ltd, China National Petroleum Corporation (CNPC), Beijing, PR China
| | - Dongbo Xie
- School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, PR China
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16
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Fabricating a hydrophobic modified flocculant through UVC irradiation initiation for metalworking wastewater treatment. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2019.10.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Wei H, Gao B, Ren J, Li A, Yang H. Coagulation/flocculation in dewatering of sludge: A review. WATER RESEARCH 2018; 143:608-631. [PMID: 30031298 DOI: 10.1016/j.watres.2018.07.029] [Citation(s) in RCA: 247] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 05/03/2023]
Abstract
Sludge disposal is an integral part of wastewater treatment systems, and its cost usually accounts for more than half of the total operation cost. Sludge disposal technology is facing challenges and opportunities simultaneously and can still be improved. Sludge dewatering is an essential process in sludge disposal, and it is important for the effective reduction of the final processing cost. Coagulation/flocculation is a relatively mature, cost-effective, user-friendly sludge dewatering technology. In this work, coagulation/flocculation and their combinations with other pretreatments, including dewatering mechanisms, are reviewed. Various coagulants/flocculants used in sludge dewatering, including inorganic coagulants, organic synthetic and natural polymeric flocculants, and bioflocculants, are introduced in detail because coagulants/flocculants are the key in coagulation/flocculation. The different factors that influence the dewatering performance of these coagulants/flocculants are also presented briefly. Moreover, aiming at the complicated composition of sludge and its treatment difficulty, the prospects and technical developments of coagulation/flocculation in sludge dewatering are discussed.
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Affiliation(s)
- Hua Wei
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Boqiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Jie Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Hu Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China.
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18
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Cao L, Guo J, Tian J, Xu Y, Hu M, Guo C, Wang M, Fan J. Synthesis, characterization and working mechanism of a novel sustained-release-type fluid loss additive for seawater cement slurry. J Colloid Interface Sci 2018; 524:434-444. [PMID: 29677612 DOI: 10.1016/j.jcis.2018.03.079] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/19/2018] [Accepted: 03/24/2018] [Indexed: 11/20/2022]
Abstract
Synthetic polymer fluid loss additive (FLA), an important type of admixture, was broadly applied in modern well cementation. However, the filter loss volume and fluidity of cement pastes containing polymer-FLA would deteriorate remarkably when sea water was used in mixing slurries instead of fresh water. In this study, a novel sustained-release-type fluid loss additive(S-FLA) was synthesized by means of anion-exchange intercalation reaction between an anionic type-copolymer and a calcium/aluminum type-Layered Double Hydroxide (Ca/Al-LDH). Based on the fluidity and compressive strength of experiments, it was found that in seawater mixing conditions, this composite material not only utilized its sustained release effect to significantly improve retention fluidity performance, but also the seed crystal effect of the Ca/Al-LDH effectively alleviated the declining in compressive strength of the slurries caused by the carboxyl group in the polymer. More interestingly, the realization of the slow release function increased actual adsorption capacity of the anionic polymer on the surface of cement hydrated particles, which made its controlling water loss effect was also better than that of the conventional FLA. The above advantages of this hybrid materials created the possibility to surmount the negative effect of electrolytes present in seawater, so as to provide some useful references for its practical application in the offshore well cement.
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Affiliation(s)
- Lei Cao
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Jintang Guo
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
| | - Jianhua Tian
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yang Xu
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Miaomiao Hu
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Chun Guo
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Meiyu Wang
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Jinjie Fan
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
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19
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Wu J, Li M, Zhang A. Synthesis and characterization of SSS/HAM/AA terpolymer as a fluid loss additive for oil well cement. J Appl Polym Sci 2018. [DOI: 10.1002/app.46266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jing Wu
- Materials Science and Engineering Institute; Southwest Petroleum University; Xindu Chengdu China
| | - Ming Li
- Materials Science and Engineering Institute; Southwest Petroleum University; Xindu Chengdu China
| | - Aili Zhang
- Materials Science and Engineering Institute; Southwest Petroleum University; Xindu Chengdu China
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20
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Nechaev AI, Gorbunova MN, Lebedeva II, Val’tsifer VA, Strel’nikov VN. Synthesis by radical polymerization and structure of drag reducing terpolymers based on acrylamide, acrylonitrile, and 2-acrylamido-2-methylpropanesulfonic acid. RUSS J APPL CHEM+ 2018. [DOI: 10.1134/s1070427217090233] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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AMPS/AAm/AAc Terpolymerization: Experimental Verification of the EVM Framework for Ternary Reactivity Ratio Estimation. Processes (Basel) 2017. [DOI: 10.3390/pr5010009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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22
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Abstract
A terpolymer comprised of sodium styrene sulfonate (SSS), fumaric acid (FA), and acrylamide (AM) was synthesized by aqueous free radical copolymerization and evaluated as fluid loss additive for oil well cement. The chemical structure and performance of the terpolymer were characterized by Fourier transform infrared (FTIR) spectroscopy and thermal gravimetric analysis (TGA); the molecular weight and its distribution were determined by gel permeation chromatography (GPC). The optimum reaction conditions of polymerization were obtained: a reaction temperature of 50°C, a mass ratio of SSS/FA/AM 4 : 2 : 14, initiator 0.1%, and reaction time of 4 h; characterization indicated that the SSS/FA/AM had a certain molecular weight and excellent temperature-resistant and salt-resistant properties. The results show that SSS/FA/AM has a good fluid loss performance, in which the API fluid loss of the oil cement slurry could be controlled within 100 mL at 160°C. In addition, it had little effect on the cement compressive strength. The results of scanning electron microscopy (SEM) of the filter cake showed that SSS/FA/AM could be adsorbed on the surface of the cement particles and produce a hydrated layer to prevent fluid loss from the oil well cement.
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23
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Wang D, Zhao T, Yan L, Mi Z, Gu Q, Zhang Y. Synthesis, characterization and evaluation of dewatering properties of chitosan-grafting DMDAAC flocculants. Int J Biol Macromol 2016; 92:761-768. [PMID: 27471087 DOI: 10.1016/j.ijbiomac.2016.07.087] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/14/2016] [Accepted: 07/24/2016] [Indexed: 11/18/2022]
Abstract
Flocculation is one of the most widely applied techniques for water treatment and sludge dewatering. A fresh environmentally friendly and powerful flocculant is highly eager in the sludge dewatering area. In this work, a highly efficient cationic flocculant, chitosan-g-PDMDAAC was synthesized through grafting a monomer, dimethy ldiallyl ammonium chloride(DMDAAC), onto chitosan initiated by ceric sulfate under ultrasonic-assisted and conventional heating condition. The graft copolymer was characterized using FT-IR, XRD and SEM. Further, the dewatering performance of municipal activated sludge was evaluated by the filter cake moisture content and specific resistance in filtration. Its application as a flocculant for wastewater treatment was investigated. The prepared chitosan-g-PDMDAAC showed a highly effective flocculation capability for activated sludge compared with chitosan, polyacrylamide(PAM), cationic polyacrylamide(CPAM).
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Affiliation(s)
- Danfeng Wang
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Tianqi Zhao
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Liuqing Yan
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Zhiming Mi
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Qiang Gu
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yumin Zhang
- College of Chemistry, Jilin University, Changchun 130012, PR China.
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24
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Dao VH, Cameron NR, Saito K. Synthesis, properties and performance of organic polymers employed in flocculation applications. Polym Chem 2016. [DOI: 10.1039/c5py01572c] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent developments on the synthesis and flocculation efficiency of several non-ionic, cationic, anionic and amphoteric polymers are presented and summarised.
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Affiliation(s)
- Vu H. Dao
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Neil R. Cameron
- Department of Materials Science and Engineering
- Monash University
- Clayton
- Australia
- School of Engineering
| | - Kei Saito
- School of Chemistry
- Monash University
- Clayton
- Australia
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25
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Qi L, Cheng JH, Liang XY, Hu YY. Synthesis and characterization of a novel terpolymer and the effect of its amphoteric property on the sludge flocculation. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24238] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Liang Qi
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy; South China University of Technology; Guangzhou 510006 China
| | - Jian-Hua Cheng
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy; South China University of Technology; Guangzhou 510006 China
| | - Xiao-Yan Liang
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy; South China University of Technology; Guangzhou 510006 China
| | - Yong-You Hu
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy; South China University of Technology; Guangzhou 510006 China
- State Key Lab of Pulp and Paper Engineering; College of Light Industry and Food Science, South China University of Technology; Guangzhou 510640 China
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26
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Guan Q, Zheng H, Zhai J, Liu B, Sun Y, Wang Y, Xu Z, Zhao C. Preparation, characterization, and flocculation performance of P(acrylamide-co-diallyldimethylammonium chloride) by UV-initiated template polymerization. J Appl Polym Sci 2014. [DOI: 10.1002/app.41747] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Qingqing Guan
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Jun Zhai
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Bingzhi Liu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Yongjun Sun
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Yili Wang
- College of Environmental Science and Engineering, Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University; Beijing 100083 China
| | - Zhinan Xu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
| | - Chun Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University; Chongqing 400045 China
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27
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Sun Y, Zheng H, Zhai J, Teng H, Zhao C, Zhao C, Liao Y. Effects of surfactants on the improvement of sludge dewaterability using cationic flocculants. PLoS One 2014; 9:e111036. [PMID: 25347394 PMCID: PMC4210158 DOI: 10.1371/journal.pone.0111036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 09/26/2014] [Indexed: 12/01/2022] Open
Abstract
The effects of the cationic surfactant (cationic cetyl trimethyl ammonium bromide, CTAB) on the improvement of the sludge dewaterability using the cationic flocculant (cationic polyacrylamide, CPAM) were analyzed. Residual turbidity of supernatant, dry solid (DS) content, extracellular polymeric substances (EPS), specific resistance to filtration (SRF), zeta potential, floc size, and settling rate were investigated, respectively. The result showed that the CTAB positively affected the sludge conditioning and dewatering. Compared to not using surfactant, the DS and the settling rate increased by 8%–21.2% and 9.2%–15.1%, respectively, at 40 mg·L−1 CPAM, 10×10−3 mg·L−1 CTAB, and pH 3. The residual turbidities of the supernatant and SRF were reduced by 14.6%–31.1% and 6.9%–7.8% compared with turbidities and SRF without surfactant. Furthermore, the release of sludge EPS, the increases in size of the sludge flocs, and the sludge settling rate were found to be the main reasons for the CTAB improvement of sludge dewatering performance.
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Affiliation(s)
- Yongjun Sun
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
- * E-mail: (YS); (HZ)
| | - Huaili Zheng
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
- * E-mail: (YS); (HZ)
| | - Jun Zhai
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
| | - Houkai Teng
- CNOOC Tianjin Chemical Research and Design Institute, Tianjin, China
| | - Chun Zhao
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
| | - Chuanliang Zhao
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
| | - Yong Liao
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, China
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28
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Liao Y, Zheng H, Qian L, Sun Y, Dai L, Xue W. UV-Initiated Polymerization of Hydrophobically Associating Cationic Polyacrylamide Modified by a Surface-Active Monomer: A Comparative Study of Synthesis, Characterization, and Sludge Dewatering Performance. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5016987] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi Liao
- Department of Architectural Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, China
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29
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Photoinitiated polymerization of cationic acrylamide in aqueous solution: synthesis, characterization, and sludge dewatering performance. ScientificWorldJournal 2014; 2014:465151. [PMID: 24683343 PMCID: PMC3933518 DOI: 10.1155/2014/465151] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 11/17/2013] [Indexed: 12/04/2022] Open
Abstract
A copolymer of acrylamide (AM) with acryloyloxyethyl trimethyl ammonium chloride (DAC) as the cationic monomer was synthesized under the irradiation of high-pressure mercury lamp with 2,2-azobis(2-amidinopropane) dihydrochloride (V-50) as the photoinitiator. The compositions of the photoinduced copolymer were characterized by Fourier transform infrared spectra (FTIR), ultraviolet spectra (UV), and scanning electron microscope (SEM). The effects of 6 important factors, that is, photo-initiators concentration, monomers concentration, CO(NH2)2 (urea) concentrations, pH value, mass ratio of AM to DAC, and irradiation time on the molecular weight and dissolving time, were investigated. The optimal reaction conditions were that the photo-initiators concentration was 0.3%, monomers concentration was 30 wt.%, irradiation time was 60 min, urea concentration was 0.4%, pH value was 5.0, and mass ratio of AM to DAC was 6 : 4. Its flocculation properties were evaluated with activated sludge using jar test. The zeta potential of supernatant at different cationic monomer contents was simultaneously measured. The results demonstrated the superiority of the copolymer over the commercial polyacrylamide as a flocculant.
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30
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Guan Q, Zheng H, Zhai J, Zhao C, Zheng X, Tang X, Chen W, Sun Y. Effect of Template on Structure and Properties of Cationic Polyacrylamide: Characterization and Mechanism. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404116k] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qingqing Guan
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Jun Zhai
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Chun Zhao
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Xiaokai Zheng
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - XiaoMin Tang
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Wei Chen
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Yongjun Sun
- Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, and ‡National Centre for International Research
of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
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31
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Lv S, Sun T, Zhou Q, Liu J, Ding H. Synthesis of starch-g-p(DMDAAC) using HRP initiation and the correlation of its structure and sludge dewaterability. Carbohydr Polym 2014; 103:285-93. [DOI: 10.1016/j.carbpol.2013.12.036] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/11/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
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32
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Zheng H, Sun Y, Guo J, Li F, Fan W, Liao Y, Guan Q. Characterization and Evaluation of Dewatering Properties of PADB, a Highly Efficient Cationic Flocculant. Ind Eng Chem Res 2014. [DOI: 10.1021/ie403635y] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huaili Zheng
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Yongjun Sun
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Jinsong Guo
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Fengting Li
- State
Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Wei Fan
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Yong Liao
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Qingqing Guan
- Key
laboratory of the Three Gorges Reservoir Region’s Eco-Environment,
State Ministry of Education, Chongqing University, Chongqing 400045, China
- National
Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China
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33
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UV-Initiated polymerization of cationic polyacrylamide: synthesis, characterization, and sludge dewatering performance. ScientificWorldJournal 2014; 2013:937937. [PMID: 24459451 PMCID: PMC3886616 DOI: 10.1155/2013/937937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/03/2013] [Indexed: 11/17/2022] Open
Abstract
P(AM-DAC-BA) was synthesized through copolymerization of acrylamide (AM), acryloyloxyethyl trimethyl ammonium chloride (DAC), and butylacrylate (BA) under ultraviolet (UV) initiation using response surface methodology (RSM). The influences of light intensity, illumination time, and photoinitiator concentration on the intrinsic viscosity [η] of P(AM-DAC-BA) were investigated. RSM model based on the influencing data was established for optimizing synthetic conditions. It was found that, at light intensity 1491.67 μw·cm−2, illumination time 117.89 min, and photoinitiator concentration 0.60‰, there was a better material performance achieved. Thus P(AM-DAC-BA) prepared under the above conditions showed excellent dewatering performance that, with 40 mg·L−1 P(AM-DAC-BA) at pH 7, the residual turbidity of supernatant and the dry solid content were up to 38 NTU, 28.5%, respectively.
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34
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Copolymer SJ-1 as a Fluid Loss Additive for Drilling Fluid with High Content of Salt and Calcium. INT J POLYM SCI 2014. [DOI: 10.1155/2014/201301] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A ternary copolymer of 2-acrylamide-2-methyl propane sulfonic acid (AMPS), acrylamide (AM), and allyl alcohol polyoxyethylene ether (APEG) with a side chain polyoxyethylene ether(C2H4O)nSJ-1 were designed and synthesized in this work. Good temperature resistance and salt tolerance of “–SO3-” of AMPS, strong absorption ability of “amino-group” of AM, and good hydrability of side chain polyoxyethylene ether(C2H4O)nof APEG provide SJ-1 excellent properties as a fluid loss additive. The chemical structure of ternary copolymer was characterized by Fourier transform infrared (FTIR) spectroscopy. The molecular weight and its distribution were determined by gel permeation chromatography (GPC). The API fluid loss of drilling fluid decreased gradually with the increasing concentration of NaCl and CaCl2in the mud system. SJ-1 was applied well in the drilling fluid even at a high temperature of 220°C. Results of zeta potential of modified drilling fluid showed the dispersion stability of drilling fluid system. Scanning electron microscopy (SEM) analysis showed the microstructure of the surface of the filter cake obtained from the drilling fluid modified by SJ-1.
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35
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Sun Y, Zheng H, Tan M, Wang Y, Tang X, Feng L, Xiang X. Synthesis and characterization of composite flocculant PAFS-CPAM for the treatment of textile dye wastewater. J Appl Polym Sci 2013. [DOI: 10.1002/app.40062] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yongjun Sun
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment; State Ministry of Education, Chongqing University; Chongqing 400045 China
| | - Huaili Zheng
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment; State Ministry of Education, Chongqing University; Chongqing 400045 China
| | - Mingzhuo Tan
- GuangDong Wealth Environmental Protection Co., Ltd.; Guangdong 529000 China
| | - Yili Wang
- 3College of environmental science and engineering; Beijing Forestry University; Beijing 100083 China
| | - Xiaomin Tang
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment; State Ministry of Education, Chongqing University; Chongqing 400045 China
| | - Li Feng
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment; State Ministry of Education, Chongqing University; Chongqing 400045 China
| | - Xinyi Xiang
- Key laboratory of the Three Gorges Reservoir Region's Eco-Environment; State Ministry of Education, Chongqing University; Chongqing 400045 China
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