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Recycling Phosphorus from Waste in China: Recycling Methods and Their environmental and Resource Consequences

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SSRN 2022年

作者： Liu, Xuewei Zhang, You Yuan, Zengwei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Recycling phosphorus (P) from waste is an effective way to alleviate resource and environmental pollution due to excessive phosphate consumption. In order to better understand the feedback of phosphorus cycle to waste recycling methods, a P waste feedback model was built to predict P waste generation, recycling, loss patterns and phosphate consumption in China under several scenarios. Three recycling methods, waste as fertilizer, waste as feed and waste as industrial material, were analyzed for each scenario. The results show that dietary change causes sharp increase in P loss and phosphate consumption, but the integrated measures can offset the increase. ‘Waste as fertilizer’ has greater reduction in phosphate consumption, ‘waste as feed’ method effectively mitigates P loss, and 'waste as material' method is less effective. Integrated measure with ‘waste as fertilizer’ method minimizes the pressure of phosphate reserve depletion, but the economically recoverable reserve would still be depleted around 2053. © 2022, The Authors. All rights reserved.

关键词： Water pollution

The Influence of Redox Potential on Phosphorus Release from Sediments in Different Water Bodies

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SSRN 2024年

作者： Ye, Lijihong Xiao, Yao Qin, Jie Tang, Jinyong Yin, Yuepeng Zhang, Wen State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu610059 China State Environmental Protection Key Laboratory of Synergetic Control Joint Remediation for Soil& Water Pollution College of Ecology and Environment Chengdu University of Technology Chengdu610059 China

Due to years of anthropogenic impact, many water bodies have sediment rich in phosphorus. The redox potential (Eh) is crucial for determining the adsorption or release of phosphorus from sediments. This study examines the effects of Eh variations under aerobic and anaerobic conditions on the phosphorus release dynamics in different water bodies (rivers, lakes, and reservoirs). Findings include: (1) In sediment-overlying water systems, Eh shows an inverse trend with pH, also affecting metal concentrations;(2) Under anaerobic conditions, sediments release more phosphorus, with iron being a key factor in Eh-regulated phosphorus release;(3) The phosphorus adsorption capacity of lake and reservoir sediments is sensitive to changes between aerobic and anaerobic environments. To prevent algal blooms, stricter regulatory measures are recommended during water level fluctuations in lakes and reservoirs. © 2024, The Authors. All rights reserved.

关键词： Sediments

Highly Efficient and Selective Extraction of Phosphorous from Wastewater as Vivianite in a Strategically Operated Four-Chamber Flow Electrode Capacitive Deionization

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SSRN 2022年

作者： Liang, Peng He, Yunfei Zhang, Xiaori Zuo, Kuichang Yang, Fan Gao, Tie State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China The Key Laboratory of Water and Sediment Sciences Ministry of Education College of Environment Sciences and Engineering Peking University Beijing100871 China

Phosphorus (P) is not only one of the main contaminants in wastewater but also an essential nutrient for all living organisms. In this study, we demonstrate a highly efficient and selective process for extraction of P from wastewater in the form of solid vivianite using a strategically operated four-chamber flow electrode capacitive deionization (FC-FCDI). The separated diluate and concentrate chambers in FC-FCDI enables continuous production of dephosphorylated water and P-rich brine, realizing P removal rate (0.22 μmol/(cm2 ·min)) and enrichment efficiency (concentration factor of 17.2) much higher than previous studies. The spontaneously enriched competing ions in the concentrate mitigate their further migration due to concentration countering effect, realizing to date the highest selectivity for P over SO42- (4.4) in CDI systems. Most importantly, the precipitated vivianite has high P content (12.4%) and much smaller volume compared with the P-recovered solution in previous studies. The recovery of P in the solid state prevents the production of brine wastes, requires no water input for concentrate replenishment, and is conducive to transport, storage, and direct usage for various purposes. This work suggests a novel method for highly selective and efficient extraction of P from wastewater using tailor-designed and strategically-operated FC-FCDIs. © 2022, The Authors. All rights reserved.

关键词： Extraction

Revisiting the Role of H2o2 in Periodate Electro-Activation System: The Non-Dependence in Pollutant Removal

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SSRN 2024年

作者： Zhou, Zhengwei Ye, Guojie Zong, Yang Zhao, Zhenyu Hou, Chengsi Chen, Zuofeng Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and Engineering Tongji University Shanghai200092 China

The existence of hydrogen peroxide (H2O2) within the electro-activation of periodate (PI) system is conventionally considered as conducive to the removal of pollutants. However, this study discovered an unusual phenomenon: the pollutants removal did not depend on H2O2. The removal efficiency of pollutants and the yield of hydroxyl radical (·OH) are enhanced after quenching H2O2. Therefore, this study aims to revisit and delve deeper into the role of H2O2, particularly in the generation of active species. Mixed metal oxide and graphite felt are selected as the anode and cathode for the activation of PI in Bisphenol A (BPA) degradation. There exist two distinct pathways for PI activation, including direct cathodic electroreduction and indirect in-situ generated H2O2 catalysis. The BPA removal efficiency increased after adding catalase, with all efficiencies exceeding 80% within 40 minutes. Meanwhile, multiple probing techniques clearly identify the variety of active species and generation pathway such as Electron paramagnetic resonance (EPR), LC-QTOF-MS, and quenching experiment. Electrogenerated H2O2 serves as a precursor for the generation of superoxide radical anions (O2·-) and singlet oxygen (1O2), yet it diminishes the efficiency of direct cathode activation due to the consumption of PI. Furthermore, the system demonstrated excellent stability, applicability, and cleanliness, effectively removing contaminations without the accumulation of iodine byproducts. The degradation intermediates products of BPA are monitored and the toxicities are evaluated. The study provides novel insights into the regulation of active species for contaminant elimination and electrode design, holding significant implications for specialized sewage treatment. © 2024, The Authors. All rights reserved.

关键词： Hydrogen peroxide

Improved Mechanical Strength and Adsorption Capacity of Anion Exchange Resin by Poly (Acrylic Acid) /Phenolic Interpenetrating Polymer Networks

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SSRN 2022年

作者： Zhong, Kaiwen Yang, Hongyu Shuang, Chendong Zhang, Guang Chen, Dong Li, Aimin State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Polyacrylic anion exchange resin (AER) is effective in removing many contaminants in water, but their poor mechanical strength limits their industrial application. In this study, AER-1 with poly (acrylic acid) /phenolic interpenetrating polymer networks was prepared under acidic conditions, and the resin was characterized and evaluated for its adsorption performance. The sphericity after attrition of AER-1 was 97.5%, while the AER was only 57.1%. This improved mechanical strength could be partially attributed to hydrogen bonds. Moreover, the increased pore volume and average pore size results in the enhanced adsorption amount from 0.22 mmol/g to 0.26 mmol/g at equilibrium with 0.05 g resin in 100 mL of ibuprofen solution (0.15 mM). An increasing kinetic constant k1 from 0.024 to 0.033 can be obtained from the pseudo-first order kinetic fitting (R2 > 0.98). Compared with AER-1, AER-2 synthesized under alkaline conditions shows a less improved performance in mechanical strength and pore structure. The Langmuir adsorption isotherm model (R2 >0.98) is more consistent with the experimental data, indicating monolayer adsorption on a homogeneous surface. Small molecule acidic organics are more competitive due to the expansion of resin pore channels. Gallic acid (80 mg/L) lowers the adsorption capacity by 64.3%, while humic acid only produces a 10% reduction in adsorption capacity because of pore exclusion. In ten adsorption-regeneration cycle experiments, AER showed no decrease in adsorption capacity. © 2022, The Authors. All rights reserved.

关键词： Pore structure

Health risk ranking of antibiotic resistance genes in the Yangtze River

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environmental Science and Ecotechnology 2024年第5期21卷 113-122页

作者： Chunxia Jiang Zelong Zhao Hans-Peter Grossart Feng Ju Yi Zhao Geoffrey Michael Gadd Ewa Korzeniewska Yuyi Yang Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan430074China University of Chinese Academy of Sciences Beijing100049China Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station Chinese Academy of Sciences&Hubei ProvinceWuhan430074China Liaoning Key Laboratory of Marine Fishery Molecular Biology Liaoning Key Lab of Germplasm Improvement and Fine Seed Breeding of Marine Aquatic AnimalsLiaoning Ocean and Fisheries Science Research InstituteDalian116023China Leibniz-Institute for Freshwater Ecology and Inland Fisheries(IGB) Neuglobsow16775Germany Institute for Biochemistry and Biology Potsdam UniversityPotsdam14469Germany Key Laboratory of Coastal Environment and Resources of Zhejiang Province School of EngineeringWestlake UniversityHangzhou310030China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing100083China Geomicrobiology Group School of Life SciencesUniversity of DundeeDundeeDD15EHScotlandUK State Key Laboratory of Heavy Oil Processing State Key Laboratory of Petroleum Pollution ControlChina University of PetroleumBeijing102249China Department of Water Protection Engineering and Environmental Microbiology Faculty of GeoengineeringUniversity of Warmia and Mazury in OlsztynOlsztyn10-720Poland

Antibiotic resistance is an escalating global health concern,exacerbated by the pervasive presence of antibiotic resistance genes(ARGs)in natural *** Yangtze River,the world's third-longest river,traversing areas with intense human activities,presents a unique ecosystem for studying the impact of these genes on human ***,we explored ARGs in the Yangtze River,examining 204 samples from six distinct habitats of approximately 6000 km of the river,including free-living and particle-associated settings,surface and bottom sediments,and surface and bottom bank *** shotgun sequencing,we generated an average of 13.69 Gb reads per *** findings revealed a significantly higher abundance and diversity of ARGs in water-borne bacteria compared to other habitats.A notable pattern of resistome coalescence was observed within similar habitat *** addition,we developed a framework for ranking the risk of ARG and a corresponding method for calculating the risk *** them,we identified water-borne bacteria as the highest contributors to health risks,and noted an increase in ARG risks in particle-associated bacteria correlating with heightened anthropogenic *** analysis using a weighted ARG risk index pinpointed the ChengdueChongqing and Yangtze River Delta urban agglomerations as regions of elevated health *** insights provide a critical new perspective on ARG health risk assessment,highlighting the urgent need for strategies to mitigate the impact of ARGs on human health and to preserve the ecological and economic sustainability of the Yangtze River for future human use.

关键词： Antibiotic resistance genes Yangtze River Habitat Coalescence Health risk

Sustainable treatment of nitrate-containing wastewater by an autotrophic hydrogen-oxidizing bacterium

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environmental Science and Ecotechnology 2022年第1期9卷 53-59页

作者： Yi-Zhen Chen Li-Juan Zhang Ling-Yun Ding Yao-Yu Zhang Xi-Song Wang Xue-Jiao Qiao Bao-Zhu Pan Zhi-Wu Wang Nan Xu Hu-Chun Tao Key Laboratory for Heavy Metal Pollution Control and Reutilization School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen518055GuangdongChina College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen518118GuangdongChina State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China Xi'an University of TechnologyXi'an710048ShaanxiChina Department of Civil and Environmental Engineering Virginia Polytechnic Institute and State UniversityManassas20147VirginiaUSA

Bacteria are key denitrifiers in the reduction of nitrate(NO_(3)^(-)N),which is a contaminant in wastewater treatment plants(WWTPs).They can also produce carbon dioxide(CO_(2))and nitrous oxide(N2O).In this study,the autotrophic hydrogen-oxidizing bacterium Rhodoblastus ***_(2)0 was isolated for sustainable treatment of NO_(3)^(-)N in *** removal of NO_(3)^(-)N and recovery of biomass nitrogen were *** to 99%of NO_(3)^(-)N was removed without accumulation of nitrite and N2O,consuming CO_(2)of 3.25 mol for each mole of NO_(3)^(-)N *** overall removal rate of NO_(3)^(-)N reached 1.1 mg L^(-1)h^(-1)with a biomass content of approximately 0.71 g L^(-1)within 72 ***20 participated in NO_(3)^(-)N assimilation and aerobic *** from 15N-labeled-nitrate test indicated that removed NO_(3)^(-)N was assimilated into organic nitrogen,showing an assimilation efficiency of 58%.Seventeen amino acids were detected,accounting for 43%of the *** loss through aerobic denitrification was only approximately 42%of total *** study suggests that TH_(2)0 can be applied in WWTP facilities for water purification and production of valuable biomass to mitigate CO_(2)and N_(2)O emissions。

关键词： Wastewater Nitrate Hydrogen-oxidizing bacteria Autotrophic assimilation Aerobic denitrification

Synergies between the Circular Economy and Carbon Emission Reduction

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SSRN 2024年

作者： Wang, Ning Bai, Yubing Guo, Zhanqiang Fan, Yu Meng, Fanxin Beijing Information Science and Technology University School of Economics and Management Beijing100192 China China Association of Circular Economy Beijing100037 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Beijing Key Lab of Green Development Decision Making Based on Big Data Beijing100192 China

Climate change and sustainable development are two crucial drivers of transformation within economic development models. In turn, carbon emission reduction and the circular economy are two key engines pushing forward climate change and sustainable development programs, but the question remains, do they synergize with one another, or work against each other? This study approaches this question from both theoretical and practical perspectives. Utilizing a framework that combines theory and practice, bibliometric analysis and big data analysis of text were used to analyze the Web of Science database and 2.29GB of data taken from cases in China, to understand what synergies exist between carbon emission reduction and the circular economy. The study reveals that the predominant interaction between the circular economy and carbon emission reduction is synergistic, with few offsetting effects. In other words, the circular economy significantly promotes carbon emissions reduction. At the theoretical level, the two fields are gradually evolving toward in-depth research, while at the practical level, collaboration is coalescing around four areas: hot fields, potential fields, auxiliary fields and common goals. A noteworthy contribution of this study is the development of a framework that synergizes theory and practice, providing a structured approach for future research in this domain. By quantifying the synergistic and offsetting relationship between the circular economy and carbon emissions reduction through systematic big data analysis, this research offers insights essential for achieving the UN’s Sustainable Development Goals. We also emphasize the importance of diverse case studies and multi-dimensional data analyses in future research endeavors. © 2024, The Authors. All rights reserved.

关键词： Climate change

Removal of algae and algogenic odor compounds via combined pre-chlorination and powdered activated carbon adsorption for source water pretreatment

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Separation and Purification Technology 2023年 304卷

作者： Zheng, Zheng-Xiong Lin, Yi-Li Fang, Ruo-Fan Zhou, Xiao-Yang Liu, Zhi Dong, Zheng-Yu Zhang, Tian-Yang Xu, Bin State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung824 Taiwan

This study investigated the combination sequence and time interval of chlorination and powdered activated carbon (PAC) adsorption for the control of algae inactivation, algogenic odor removal, and disinfection by-product (DBP) formation. Results indicated that pre-chlorination/post-PAC exhibited the highest algae removal efficiency in all sequential combinations of PAC adsorption and chlorination, while it had displayed slight effect on the removal of DBPs. The evaluated sequential combinations all had significant effect on the removal of odor. Nevertheless, prolonged time interval between chlorination and PAC adsorption exhibited enhanced control of algae and odor compounds in all experiments;with increasing time interval from 0 to 15 min in pre-chlorination/post-PAC process, the removal efficiency of Chl-a, algal cell viability, GSM, and 2-MIB increased by 46%, 15%, 15% and 23%, respectively. In the combined processes, the odor removal efficiency was positively correlated with PAC dosage but negatively correlated with chlorine dosage. Furthermore, PAC addition could effectively reduce the total DBP yields, especially the N-DBPs. This study can provide a better understanding of improving in-situ operation of the pre-chlorination and PAC dosing systems for source water pretreatment. © 2022 Elsevier B.V.

关键词： Algae