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Shen S, Xia W, Luo Z, Pan Y, Hu P, Zhang L, Shi H, Yang H. Enhanced sludge dewaterability using a bifunctional hybrid coagulant. CHEMOSPHERE 2023; 344:140323. [PMID: 37777090 DOI: 10.1016/j.chemosphere.2023.140323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/16/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
The combination of coagulation and addition of skeleton builder is a popular pretreatment method to improve the dewaterability of sludge. In this study, a novel bifunctional inorganic/organic hybrid coagulant (CS-Si@ATP) was designed and obtained by chemically coupling a cationic starch (CS) with a popular clay, that is, attapulgite (ATP), via a silane coupling agent (APTES) for one-step conditioning of sludge. CS-Si@ATP can evidently enhance the sludge dewatering performance compared with CS, ATP, and their simple combination due to the distinct dual functions of this hybrid coagulant. The tentacle-like cationic CS in CS-Si@ATP shows efficient charge neutralization effect to aggregate and precipitate the suspended solids for further formation of compact sludge cakes. Meanwhile, the internal ATP with a stable and rigid structure acts as the skeleton builder to notably improve the filterability and permeability of the sludge cakes. The synergistic effects of CS and ATP in CS-Si@ATP, i.e., the charge neutralization of CS and the skeleton construction of ATP, cause the evidently enhanced sludge dewaterability, with a filter cake moisture content approximately 78.30% after the mechanical dewatering at 0.05 MPa. In comparison with the traditional two-step combination process by separated addition of CS and ATP, the one-step addition of CS-Si@ATP can reduce the required ATP dose nearly an order of magnitude. Thus, CS-Si@ATP has the notable advantages of simple operation, efficient utilization of ATP and evident reduction of disposal cost. This study provides an environmentally friendly and cost-effective coagulant to further improve the dewaterability of sludge.
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Affiliation(s)
- Shaohang Shen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing. 210023, PR China
| | - Wei Xia
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing. 210023, PR China
| | - Zhang Luo
- China Railway Engineering Services Co., Ltd., Chengdu, 610083, PR China
| | - Yu Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing. 210023, PR China
| | - Pan Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing. 210023, PR China
| | - Longguan Zhang
- China Railway Engineering Services Co., Ltd., Chengdu, 610083, PR China
| | - Hongtao Shi
- China Railway Engineering Services Co., Ltd., Chengdu, 610083, 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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Wang Y, Ma L, Zhang M, Li H, Han Z. Degradation of rhodamine B by persulfate activated with green tea iron nanoparticles. ENVIRONMENTAL TECHNOLOGY 2023; 44:792-803. [PMID: 35108163 DOI: 10.1080/09593330.2021.1985619] [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: 01/28/2021] [Accepted: 09/11/2021] [Indexed: 06/14/2023]
Abstract
Green iron tea nanoparticles (GT-Fe NPs) were used as persulfate(PS) activators to oxidize rhodamine B (RhB) in this study. Optimized oxidative degradation condition was 0.033 mM Fe, 5 mM PS at pH 3.0 and 298 K with an initial RhB content of 50 mg/L. After 120 min of RhB degradation utilizing GT-Fe NPs activated PS, 99% of RhB reduction was achieved, while 98% RhB reduction with PS activated by citric acid-Fe2+(CA-Fe) with the same amount of Fe2+. This RhB reduction was due to the delayed release of Fe(II) in the GT-Fe NPs. The addition of GT-Fe NPs enhanced the synthesis of OH· and SO4-· while inhibiting the formation of O2-·. A possible RhB degradation pathway was the chromophore destruction and ring-opening processes using GT-Fe NPs/PS, which produced a range of low molecular weight carboxylic acids (oxalic acid, lactic acid, acetic acid, and formic acid). GT-Fe NPs seem to be a promising persulfate activator in comparison to common activators such as CA-Fe.
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Affiliation(s)
- Yanyan Wang
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, People's Republic of China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, People's Republic of China
| | - Lisha Ma
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, People's Republic of China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, People's Republic of China
| | - Meng Zhang
- Yejin Geological Team of Hubei Geological Bureau, Huangshi, People's Republic of China
- Huangshi Geological Environment Monitoring and Protection Station of Hubei Province, Huangshi, People's Republic of China
| | - Hui Li
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, People's Republic of China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, People's Republic of China
| | - Zhantao Han
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, People's Republic of China
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Lin D, Fu Y, Li X, Wang L, Hou M, Hu D, Li Q, Zhang Z, Xu C, Qiu S, Wang Z, Boczkaj G. Application of persulfate-based oxidation processes to address diverse sustainability challenges: A critical review. JOURNAL OF HAZARDOUS MATERIALS 2022; 440:129722. [PMID: 35963083 DOI: 10.1016/j.jhazmat.2022.129722] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Over the past years, persulfate (PS) is widely applied due to their high versatility and efficacy in decontamination and sterilization. While treatment of organic chemicals, remediation of soil and groundwater, sludge treatment, disinfection on pathogen microorganisms have been covered by most published reviews, there are no comprehensive and specific reviews on its application to address diverse sustainability challenges, including solid waste treatment, resources recovery and regeneration of ecomaterials. PS applications mainly rely on direct oxidation by PS itself or the reactive sulfate radical (SO4•-) or hydroxyl radical (•OH) from the activation of peroxodisulfate (PDS, S2O82-) or peroxymonosulfate (PMS, HSO5-) in SO4•--based advanced oxidation processes (SO4•--AOPs). From a broader perspective of environmental cleanup and sustainability, this review summarizes the various applications of PS except pollutant decontamination and elaborates the possible reaction mechanisms. Additionally, the differences between PS treatment and conventional technologies are highlighted. Challenges, research needs and future prospect are thus discussed to promote the development of the applications of PS-based oxidation processes in niche environmental fields. In all, this review is a call to pay more attention to the possibilities of PS application in practical resource reutilization and environmental protection except widely reported pollutant degradation.
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Affiliation(s)
- Dagang Lin
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Yu Fu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Xiaodie Li
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Lingli Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Meiru Hou
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Dongdong Hu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Qingchao Li
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhen Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Chunxiao Xu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Sifan Qiu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhaohui Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, China.
| | - Grzegorz Boczkaj
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland; EkoTech Center, Gdansk University of Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland
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Xia J, Ji J, Hu Z, Rao T, Liu A, Ma J, Sun Y. Application of Advanced Oxidation Technology in Sludge Conditioning and Dewatering: A Critical Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159287. [PMID: 35954642 PMCID: PMC9368043 DOI: 10.3390/ijerph19159287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023]
Abstract
Sludge dewatering is an important link in sludge treatment. In practical engineering, the dewatering effect of unconditioned sludge is very poor. The use of advanced oxidation technology can improve sludge dewatering performance, reduce sludge capacity, and remove micro-pollutants, which is beneficial for sludge post-treatment and disposal. Based on the current status of sludge conditioning and dehydration, the characteristics of the advanced oxidation method for sludge dehydration were systematically explained using various free radical reaction mechanisms and dehydration conditions. The effects of various advanced oxidation technologies on sludge conditioning and dewatering has been extensively discussed. Finally, the application prospects of the advanced oxidation technology in sludge conditioning and dewatering are presented.
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Affiliation(s)
- Jiahua Xia
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Juan Ji
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Zhiqiang Hu
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Ting Rao
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Ankang Liu
- Nanjing Water Purification Environmental Research Institute Co., Ltd., Nanjing 211100, China;
| | - Jingqian Ma
- College of Urban Construction, Nanjing Tech University, Nanjing 211800, China;
| | - Yongjun Sun
- College of Urban Construction, Nanjing Tech University, Nanjing 211800, China;
- Correspondence:
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Wang J, Meng X, Chen Y, Zheng G, Zhou L. Simultaneously attenuating antibiotic resistance genes and improving the dewaterability of sewage sludge by conditioning with Fenton's reagent: the pivotal role of sludge pre-acidification. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:13300-13311. [PMID: 33175353 DOI: 10.1007/s11356-020-11562-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
Fenton conditioning processes have been recently employed to improve the dewaterability of sewage sludge. However, it remains unclear whether the conditioning with Fenton's reagent would simultaneously attenuate antibiotic resistance genes (ARGs) in sludge and improve sludge dewaterability. It was found in the present study that sludge pre-acidification played a pivotal role in simultaneously removing ARGs and improving sludge dewaterability by conditioning with Fenton's reagent. When the sewage sludge was pre-acidified to pH = 3.0 and was then conditioned using Fenton's reagent, the absolute abundances of the total ARGs and the total mobile genic elements (MGEs) in conditioned sludge were reduced by 1.85-2.10 and 2.84-3.12 log units, respectively. Additionally, sludge capillary suction time (CST) and specific resistance to filtration (SRF) were drastically reduced, and the moisture content (MC) in dewatered sludge cake was reduced to only 60.61-69.95%. Such effective attenuation of ARGs and MGEs in conditioned sludge led to their removal in both the dewatered sludge cakes and dewatering filtrate. However, only the improvement of sludge dewaterability was attained by sludge conditioning with Fenton's reagent but without sludge pre-acidification. During the conditioning treatment, the removal of loosely bound extracellular polymeric substance (EPS) and tightly bound EPS in conditioned sludge contributed to the improvement of sludge dewaterability, and the damage of sludge microbial cells was highly correlated with the attenuation of antibiotic resistance. Thus, sludge pre-acidification combined with conditioning using Fenton's reagent can be employed to simultaneously attenuate the antibiotic resistance in sewage sludge and improve sludge dewaterability.
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Affiliation(s)
- Jiajun Wang
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaoqing Meng
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu Chen
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guanyu Zheng
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China.
- Department of Environmental Engineering, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
| | - Lixiang Zhou
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China
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Ni W, Xiao X, Li Y, Li L, Xue J, Gao Y, Ling F. DETA impregnated attapulgite hybrid ZIF-8 composite as an adsorbent for the adsorption of aspirin and ibuprofen in aqueous solution. NEW J CHEM 2021. [DOI: 10.1039/d0nj05743f] [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 diethylenetriamine (DETA) impregnated modified attapulgite hybrid ZIF-8 composite is a new type of amine impregnated hybrid MOF adsorbent, which has an excellent ability to remove aspirin and ibuprofen from aqueous solution.
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Affiliation(s)
- Weiming Ni
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Xinfeng Xiao
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Yanjun Li
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Lin Li
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jianliang Xue
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Yu Gao
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Fei Ling
- College of Safety and Environment Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
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