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Separation of nutrients from SCFAs with a dynamic membrane in a sludge anaerobic fermenter

Chemosphere 2024年 355卷 141824页

作者： Yang, Lisha Chen, Kai Chen, Long Zhai, Shixin Li, Zhuo Zhu, Hongtao Beijing Key Lab for Source Control Technology of Water Pollution Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-Remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

The complexity and high cost to separate and recover short chain fatty acids (SCFAs), ammonium ions, and phosphates in the sludge fermentation liquid hinder the application of sludge anaerobic fermentation. In this study, an interesting phenomenon was found in a sludge anaerobic fermenter with a dynamic membrane (DM) which could not only enhance SCFAs production but also retain most SCFAs in fermenter. The separation factor of DM for NH3-N/SCFAs and PO43−/SCFAs throughout the DM development were about 40 and 80, respectively. Analysis reveals that rejection of SCFAs by DM could not be simply correlated to molecular weight or membrane pore size. The rejection mechanisms might be dominated by Donnan rejection. In addition, biodegradation in the DM may also have contribution. Findings of this study suggest the potential of DM as an economical technology for nutrients and SCFAs recover. © 2024 Elsevier Ltd

关键词： Nutrients

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Effect of fly ash on solidification and heavy metals chemical speciation of sludge

Effect of fly ash on solidification and heavy metals chemica...

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International Conference on Measuring technology and Mechatronics Automation

作者： Piao, Yongjian Wu, Mingsong Xu, Xun Zhao, Qingliang Zhang, Fugui Ren, Nanqi Key Lab. of Water Resource Utilization and Environmental Pollution Control Harbin Institute of Technology Harbin Heilongjiang 150090 China Water Engineering Co. Ltd. Harbin Heilongjiang 150050 China

ISBN: (纸本)9780769542966

In order to explore new municipal sewage sludge treatment method and reduce its harm for environment, fly ash discarded from power plant was used as conditioner in sludge treatment in the paper. The properties of sewage sludge were changed after adding fly ash. The optimum fly ash amount 0.03kg/kg was obtained through the compressive strength test. After adding optimum amount fly ash, the percentages of Cu, Zn and Ni of the residual fraction in sludge increased, while the other fractions changed accordingly. But the percentages of Cd in the five forms changed slightly. By adding proper fly ash, the compressive strength of sludge increased significantly, and the availability of Cu, Ni and Zn was reduced. All the results provide a new way for sludge treatment and a new thinking for resource utilization of fly ash.

关键词： Heavy metals

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Effects of coexisting nanomaterials on the photodegradation behavior and ecotoxicity of antibiotics in the aqueous

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Chemosphere 2024年 366卷 143509页

作者： Yang, Yang Tong, Yao Han, Qi Feng, Li Gao, Peng Zhang, Liqiu Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

Nanomaterials (NPs) and antibiotics, as two emergent pollutants, forms a complex contamination through their interaction, potentially causing adverse effects on the organism. This study systematically examined the influence of two NPs (CuO NPs and carbon nanotubes, CNTs) on the photodegradation behavior of tetracycline (TC) and their combined toxic effects on Chlorella vulgaris. The results showed that CuO NPs significantly accelerated TC photodegradation compared to CNTs, increasing the TC photodegradation rate constant by187.6%. Electron spin resonance (ESR) indicated that under the coexistence of CuO NPs or CNTs, 1O2、O2•- and •OH were the main active species promoting TC photodegradation. Probe and quenching experiments confirmed the predominant role of O2•- and 1O2 in the presence of CuO NPs and CNTs. Additionally, three possible TC photodegradation pathways were proposed for the coexistence of CuO NPs and CNTs. In the Chlorella vulgaris growth inhibition experiment, the combined toxicity of CuO NPs or CNTs and TC was higher than that of individual substance, indicating significant synergistic effects, especially with the combination of CNTs and TC. This study provides a new perspective on accurately assessing the environmental behaviors and risks when NPs and antibiotics coexist. © 2024

关键词： Electron spin resonance spectroscopy

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Cobalt doped nitrogen-vacancies-rich C3N5 with optimizing local electron distribution boosts peroxymonsulfate activation for tetracycline degradation: Multiple electron transfer mechanisms

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Chemosphere 2023年第1期339卷

作者： Tong, Yao Gao, Peng Xu, Jiacan Liu, Shiqi Yang, Yang Wang, Yang Feng, Li Han, Qi Liu, Yongze Zhang, Liqiu Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

Heterogeneous photocatalysis coupled with peroxymonosulfate (PMS) activation is considered as an advanced water purification technology for emerging contaminates degradation. In this study, Cobalt (Co) doped nitrogen-vacancies-rich C3N5 photocatalysts (Co/Nv-C3N5) were designed to activate PMS for tetracycline removal. The photo-chemical oxidation system displayed superior advantage, in which the observed rate constant of tetracycline degradation (0.1488 min−1) was 10.86 and 1.82 times higher than that of photo-oxidation and chemical-oxidation systems. Density functional theory calculation results verified the reconstruction of local charge distribution during PMS activation, indicating Co doping and nitrogen-vacancy engineering not only promoted photoelectrons capture, but also boosted electron transfer from the C–N framework to PMS and the generation of active species. Furthermore, several unique multiple electron transfer mechanisms were found in nonradicals (h+, 1O2 and Co(IV)) pathways. Additionally, three possible tetracycline degradation pathways were proposed and the toxicity of the intermediates was evaluated. Overall, the findings from this study provided a novel strategy for developing high-efficient photocatalyst for the rapid degradation of organic pollutants. © 2023

关键词： Chemical activation

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Environmental and health impacts of reduced PM2.5 and trace metals from ship emissions under low-sulfur fuel oil policy in Shanghai, China

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Environmental pollution 2025年 377卷 126409页

作者： Dong, Xuyang Zhang, Yan Yu, Guangyuan Xiong, Yuqi Han, Zimin Huo, Juntao Huang, Cheng Kan, Haidong Zheng, Mei Ning, Zhi Xie, Bing National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Department of Environmental Science and Engineering Fudan University Shanghai200438 China Shanghai200062 China MOE Laboratory for National Development and Intelligent Governance Shanghai Institute for Energy and Carbon Neutrality Strategy IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan University Shanghai200433 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Shanghai200235 China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology Assessment Shanghai Institute of Infectious Disease and Biosecurity Fudan University Shanghai200032 China Children's Hospital of Fudan University National Centre for Children's Health Shanghai China SKL-ESPC and SEPKL-AERM College of Environmental Sciences and Engineering and Centre for Environment and Health Peking University Beijing100871 China Division of Environment and Sustainability The Hong Kong University of Science and Technology Clear Water Bay Hong Kong Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste School of Ecological and Environmental Sciences East China Normal University Shanghai200241 China

Ship emissions can significantly exacerbate air pollution in coastal cities, threatening public health;however, a low-sulfur fuel oil policy, which restricts sulfur content in marine fuels, can effectively mitigate such pollution-driven challenges. This study employed a high-resolution ship emission inventory to assess the impacts of the fuel oil switch on air quality and public health in Shanghai from 2017 to 2021. Results showed a 37.3 % reduction in primary PM2.5 emissions from ships, with even steeper declines of 46.7 and 91.6 % in Ni and V emissions, respectively, leading to notable air quality improvements. Health assessments revealed a reduction in premature mortality attributable to long-term exposure to the contribution of ships to atmospheric PM2.5 concentrations, with deaths decreasing from 630 cases in 2017 to 481 in 2021. Similarly, short-term exposure-related deaths fell from 43 to 29. The port and waterfront areas experienced the most pronounced health benefits. The non-carcinogenic risks posed by trace metals (Ni and V), which were detected along the Huangpu River in 2017, dropped to 0.1 by 2021. Nonetheless, the carcinogenic risk from V persisted as a concern for adults in 2021. An analysis of ship-influenced episodes showed that population-weighted concentrations and short-term premature mortality decreased by over 50 % in densely populated areas and key ports. Despite the low population density in port areas such as Wusongkou and Waigaoqiao, the human health risks linked to ship emissions remained significant. This study demonstrates the effectiveness of low-sulfur fuel oil policy in reducing emissions and health risks, providing a scientific basis for refined pollution control strategies in port cities. © 2025 Elsevier Ltd

关键词： Air quality

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Transcriptomic analysis of bisphenol AF on early growth and development of zebrafish(Danio rerio)larvae

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Environmental Science and Ecotechnology 2020年第4期4卷 1-11页

作者： Rongzhen Li Shuai Liu Wenhui Qiu Feng Yang Yi Zheng Ying Xiong Guanrong Li Chunmiao Zheng State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen518055China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen518055China School of Environmental and Chemical Engineering Shanghai UniversityShanghai200444China Shenzhen Municipal Engineering Lab of Environmental IoT Technologies Southern University of Science and TechnologyShenzhen518055Guangdong ProvinceChina

Bisphenol AF(BPAF),an alternative to bisphenol A,is widely detected in aquatic *** to health concerns,the toxic effects of BPAF on organisms are drawing *** present study aims to evaluate the toxicity of BPAF,combining the results of omics techniques and *** transcriptome sequencing(RNA-seq),we obtained 391,648,512,and 545 differentially expressed genes(DEGs)in 0.1,1,10,and 100 mg/L BPAF-exposed zebrafish larvae,*** ontology(GO)analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment revealed the early development,stimulus-response,and MAPK signaling pathway were significantly affected by *** addition,five hub genes(fgf3,fgf4,map2k1,myca,and casp3b)were highlighted as the key genes in MAPK signaling pathway using the protein-protein interaction ***,the RNA-seq results showed that early development and stimulus-response were the main processes affected by BPAF,which was consistent with our morphological and pathological *** hatching rate of zebrafish embryos in 1 and 10 mg/L BPAF groups was significantly inhibited,and the oxidative stress indexes,including the level of total antioxidant capacity(T-AOC),superoxide dismutase(SOD),and lipid peroxidation(LPO),were significantly increased by the 100 mg/L BPAF ***,the activity of alkaline phosphatase(AKP)was significantly decreased in all BPAF exposure *** conclusion,exposure to BPAF at environmental relevant concentrations affected the early development and immune system of zebrafish larvae by modulating MAPK signaling pathway,and our results provide solid evidence for the future studies on the toxicity of bisphenols.

关键词： Bisphenol AF Zebrafish Early development Oxidative stress MAPK signaling Pathway

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Occurrence and Phytoremediation Efficiency of Polycyclic Aromatic Hydrocarbons (Pahs) in Typical Urban Landscape waters Recharged by Reclaimed water

SSRN

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SSRN 2022年

作者： Zhu, Zheng Li, Lanxin Yu, Yanan Tan, Liqiong Wang, Zhefeng Suo, Siyu Liu, Chuang Qin, Yiming Peng, Xianchun Lu, Haoran Liang, Wenyan Beijing Key Lab for Source Control Technology of Water Pollution Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Yuanmingyuan Management Office Beijing China

The reuse of reclaimed water in urban landscape parks is a common practice worldwide. In this study, a park that had used reclaimed water as the sole water supply for fourteen years, was selected to analyze the distribution, sources and risks of 16 priority polycyclic aromatic hydrocarbons (PAHs) in waters and sediments within the park. The effects of phytoremediation were investigated in waterbodies classified as phytoremediation, transitional and non-phytoremediation areas. Diagnostic ratio (DR) and principal component analysis (PCA) were used to analyze the sources of PAHs, while risk quotient (RQ) and toxic equivalent quantity (TEQ) analysis were used as risk assessment tools. Results showed that ∑PAH concentrations in sediments ranged from 29.4 to 1246 ng‧g-1, corresponding to a moderate pollution level. The concentration of PAHs in water ranged from 10.6 to 326.3 ng‧L-1, corresponding to a low pollution level. The ∑PAHs in sediment exhibited a downward trend from northwest to southeast, which was consistent with the direction of water flow. In contrast, PAH concentrations in water were consistent with recreational activities in the urban park area. Coal combustion was determined to be the major source of PAHs in both the water and sediment. RQ values indicated that the risk posed by PAHs in the urban park area was moderate. The average TEQ(BaP) in the water and sediment were 4.98 ng‧L-1 and 206.2 ng‧g-1, respectively. Aquatic plants effectively removed high-ring PAHs from water and middle-ring PAHs in sediments, reducing the overall risks posed by PAHs. © 2022, The Authors. All rights reserved.

关键词： Risk assessment

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Compatibility of Vivianite-Crystallization Pathway of Phosphorus Recovery with Anaerobic Digestion Systems of Thermally Hydrolyzed Sludge

SSRN

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SSRN 2024年

作者： Cui, Haoran Yang, Xiaofan Gao, Xiaozhong Sun, Dezhi Cheng, Xiang Beijing Key Laboratory for Source Control Technology of Water Pollution Beijing Forestry University Beijing100083 China

Phosphorus in sewage is mostly enriched in activated sludge in wastewater treatment plants, making excess sludge an appropriate material for phosphorus recovery. The potential of vivianite (Fe3(PO4)2·8H2O) crystallization-based phosphorus recovery during the anaerobic digestion of thermally hydrolyzed sludge was discussed with influences of organic compounds on the formation of vivianite crystals being investigated in detail. Bovine serum albumin, humic acids and alginate, as model compounds of proteins, humic acids and polysaccharides, all inhibited vivianite crystallization, with the influence of humic acids being the most significant. A sludge retention time of > 12 d for effective degradation of organic compounds and a certain degree of FeII excess are suggested to decrease the organics resulting inhibition. The results demonstrate the compatibility of vivianite-crystallization pathway of phosphorus recovery with anaerobic sludge digesters, and reveal the complexity of vivianite formation in the sludge with further research warranted to minimize the inhibitory influences. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

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Synthesis and electrochemical behavior of monolayer-Ti_(3)C_(2)T_(x) for capacitive deionization

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Journal of Central South University 2022年第2期29卷 359-372页

作者： MIN Xiao-bo LIU Fan-song WANG Yun-yan YAN Yi-qi WANG Hai-ying School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China Water Pollution Control Technology Key Lab of Hunan Province Changsha 410083China

MXene materials have got great attention from researchers of environmental treatment for the great electrochemical ***-Ti_(3)C_(2)T_(x)(T_(x) is the surface terminal groups such as-O,-OH and/or-F species),as a typical structural MXene,always shows better chemical-physical characteristics than multilayer-Ti_(3)C_(2)T_(x).Thus,we prepared monolayer-Ti_(3)C_(2)T_(x) electrode by HF etching method and absolute ethyl alcohol intercalationdelamination treatment for capacitive deionization(CDI).The prepared monolay-Ti_(3)C_(2)T_(x) shows a higher specific surface area(235.6 m^(2)/g)and a thinner thickness(0.8 nm).Moreover,a series of systematic investigation demonstrated that monolayer-Ti_(3)C_(2)T_(x) has obvious promotional phenomenon on electrochemical properties(e.g.,mass specific capacitance increased from 52.1 F/g to 144.7 F/g).The NaCl adsorption capacity of monolayer-Ti_(3)C_(2)T_(x),is 30.7 mg/g in 1000 mg/L NaCl solution at 1.2 *** concluded that the electro-sorption mechanism could be expressed as double electric layer and monolayer coverage by a good fitting of Langmuir isotherms and the pseudo-second-order kinetics *** work would provide a new strategy for the application of monolayer-Ti_(3)C_(2)T_(x) material in wastewater treatment in the future.

关键词： monolayer-Ti_(3)C_(2)T_(x) capacitive deionization NaCl electro-sorption mechanism MXene materials

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Electrocatalysis Degradation of Biochemical Tail water from Coking Wastewater Using Particle Electrode with Persulfate

SSRN

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SSRN 2024年

作者： Lu, Haoran You, Xinyu Yang, Tong Zhu, Zheng Han, Xu Liang, Wenyan Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science & Engineering Beijing Forestry University Beijing100083 China

Due to the intricate composition and recalcitrant nature of coking wastewater, the biochemical effluent often fails to meet emission standards. Therefore, this study explored the preparation of particle electrodes, utilizing activated carbon powder (PAC) as the carrier and loading single-element Fe, Co, and Ni, as well as dual-element Ni-Fe and Co-Fe as catalyst. The particle electrode system was integrated with persulfate (PS) activation to enhance its performance. Characterization of the particle electrodes were conducted using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier infrared spectroscopy (FTIR). The effects of potassium persulfate (KPS) dosages, currents, and Ni:Fe ratios were investigated. The results showed that bimetallic particle electrodes outperformed their monometallic particle electrodes. Ni-Fe/PAC achieved the best degradation efficiency and the lowest energy consumption among the five electrode materials. When the initial concentrations of TOC and COD were set at 300 and 280 mg/L, the Ni-Fe/PAC with 5 mmol L-1 KPS achieved removal efficiencies of 61.7 and 84.4%, respectively. The metals on Ni/PAC and Co/PAC existed in the zero-valent state, while Fe on Fe/PAC was present as Fe2O3. Co-Fe/PAC exhibited the formation of CoFe2O4 oxides. Ni-Fe/PAC possessed the lowest hydrogen evolution reaction (HER) potential, the highest oxygen evolution potential (OEP), and reached an electrochemical active surface area (ECSA) of 236.3 cm2. Cyclic voltammetry (CV) curves indicated that the direct redox reactions and indirect oxidation of pollutants occurred concurrently. Both •OH and SO-4• radicals played crucial roles during the degradation processes. The degradation efficiency of organic matters was as follows: benzene compounds>heterocyclic compounds>polycyclic aromatic hydrocarbons (PAHs). © 2024, The Authors. All rights reserved.

关键词： Electrocatalysis

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