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The continuous increased stability of sediment dissolved organic matter implies ecosystem degradation of lakes in the cold and arid regions

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Science of the Total Environment 2024年 947卷 174384页

作者： Guo, Ying Liu, XiaoFei Dong, Yue Ni, Zhaokui Zhou, Chunyang Chen, Chao Wang, Shengrui Chen, Qiuying Yan, Yanting Guangdong-Hong Kong Joint Laboratory for Water Security Center for Water Research Advanced Institute of Natural Sciences Beijing Normal University at Zhuhai Zhuhai519087 China College of Water Sciences Beijing Normal University Beijing100875 China Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation Beijing100875 China Instrumentation and Service Center for Science and Technology Beijing Normal University at Zhuhai Zhuhai519087 China Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake Watershed Yunnan Province Kunming650034 China North China Institute of Science and Technology School of Chemical Safety Langfang101601 China

The characteristics of lake dissolved organic matter (DOM) pool and lake ecosystem interact, and studying the responses between sediment DOM characteristics and lake ecosystem changes may shed light on the inherent connection between ecosystem evolution and carbon biogeochemical cycles. Lakes in cold and arid regions are sensitive to changes and accumulate large amounts of carbon as DOM, which may provide a window into more explicit relationships between ecosystem evolution and changes in sediment DOM characteristics in time dimension. However, considerable blind spots exist in the responses between the sediment DOM and ecosystem evolution on time scale and the underlying mechanisms. In this study, multiple approaches were combined to investigate the relationship between the variation trend of sediment DOM characteristics and the evolution of fragile lake ecosystems across three different lake ecosystems in cold and arid regions of China. A strong positive relationship between sediment DOM stabilities, especially humification, and ecosystem degradation was found, consistent for the three lakes. Ultra-high-resolution mass spectrometry and structural equation modeling revealed that the changes of ecosystems affected sediment DOM stability through direct pathways (0.24), such as the contents of terrestrial DOM in lake DOM pool, and indirect pathways, including algae-mediated (0.43) and salinity-mediated pathways (0.22), which all increased the contents of refractory DOM in the lake DOM pool and sediments. Based on the fact that DOM stability changes could act on the ecosystem in turn, a possible positive feedback mechanism between ecosystem degradation and increased DOM stability was further inferred. These results suggested that the continuous increased stability of sediment DOM in may implies ecosystem degradation of lakes in the cold and arid regions. This study provides a new perspective for recognizing ecosystem evolution through sediment DOM and improves the unde

关键词： Lakes

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Mechanisms of organic dissolution and toxic release in sludge during anaerobic hydrolysis enhanced by ultrasound-alkaline treatment

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Journal of Water process Engineering 2025年 74卷

作者： Chen, Xiurong Feng, Xiaomin Li, Renjie Song, Meijing Yin, Danning Li, Shuo Ma, Lijuan National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China

The residual sludge is rich in organic matter, nitrogen, phosphorus, and other nutrients. However, due to its poor solubility, its bioavailability is limited, leading to low resource utilization efficiency. Anaerobic hydrolysis of sludge can dissolve cell-bound organic matter, enhancing the resource recovery potential of residual sludge. Under low-intensity ultrasound (60 W) and alkaline (pH = 9) pretreatment, anaerobic hydrolysis of sludge released substantial amounts of TOC, COD, TN, and TP. Hydroquinone, a representative phenolic compound, was selected as the target pollutant to acclimate activated sludge stepwise, simulating the residual sludge after industrial phenolic wastewater treatment. The study found that, compared to the control sludge hydrolysate (methanol-acclimated), the TOC content and organic toxicity of the toxic sludge hydrolysate (hydroquinone-acclimated) were significantly higher. The TOC concentrations in the toxic and control groups were 392.8 ± 19.65 mg/L and 264.44 ± 13.22 mg/L, respectively, with toxicity levels of 69.15 ± 3.46 % and 38.08 ± 1.9 %. By analyzing TOC changes, toxicity differences across molecular weight ranges, and 3D-EEMs spectra, it was found that the organic toxicity of sludge mainly originated from aromatic proteins in the 5-10 kDa range, particularly tryptophan and tyrosine. During anaerobic hydrolysis, dominant microbial communities decompose and utilize sludge organics through metabolic pathways such as amino acid biosynthesis, carbohydrate biosynthesis, glycolysis, respiration, the tricarboxylic acid (TCA) cycle, and amino acid metabolism. This process converts macromolecular substances in sludge into small molecules such as amino acids and monosaccharides, providing a novel strategy for the resource utilization of residual sludge. © 2025 Elsevier Ltd

关键词： Anaerobic hydrolysis High-throughput sequencing Organic toxicity Residual sludge Toxicity reduction

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Effect of Ph-Dependent Intermediate on the Performance of Lifepo4/C Cathode Material

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SSRN 2022年

作者： Lin, Sen Zhang, Ting Yu, Jianguo National Engineering Research Center for Integrated Utilization of Salt Lake Resources East China University of Science and Technology Shanghai China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai China Engineering Research Center of Salt Lake Resources Process Engineering Ministry of Education East China University of Science and Technology Shanghai China

Ferric phosphate (FePO4), as the precursor for LiFePO4 preparation, is customary to be obtained by coprecipitation for its convenience and low cost. In this study, FePO4 with different morphology were prepared at gradient coprecipitation pH and reduced to form LiFePO4/C cathode materials to quantitatively investigate the pH-dependent intermediate influence. The characterization results showed that the structure and morphology of FePO4 changed markedly from crystalline hydro-micro ball to amorphous and to fusiform intermediate with the increase of coprecipitation basicity, while high concentration of NH4+ would occur in the intermediate composition with a severe particle growth and aggregation at exorbitant pH. The electrochemical analysis manifested that FePO4 morphology and crystallinity would not affect the cyclic stability of cathode materials, however, a more even and porous FePO4 obtained from intermediate at highly acidic solution would equip the LiFePO4/C with an excellent performance. Besides, the hydro-crystalline intermediate-oriented FePO4 could provide LiFePO4/C with an excellent low charging-rate performance and the LiFePO4/C from amorphous spherical intermediate-oriented precursor was endowed with an advantageous high-rate capacity via the excellent crystallinity and charge transfer. Uneven morphology and severe particle growth would bring about obvious reduction to the discharge capacity of LiFePO4/C that the discharge capacity at 1 C rate would decrease from the optimum of 157.79 mAh·g-1 to less than 104.38 mAh·g-1 and 82.79mAh·g-1 for the FePO4 prepared with intermediates precipitated at pH of 3.0 and 2.0, respectively. © 2022, The Authors. All rights reserved.

关键词： Iron compounds

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Polyvinyl chloride microplastics and drought co-exposure alter rice growth by affecting metabolomics and proteomics

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Science of the Total Environment 2024年 955卷 177002页

作者： Khan, Kiran Yasmin Ali, Barkat Ghani, Hafiz Usman Cui, Xiaoqiang Luo, Xiaohan Ali, Zeshan Ahmed, Waqar Tan, Jinglu Lysenko, Vladimir Guo, Ya Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi214122 China Food Science Research Institute National Agricultural Research Centre Islamabad44000 Pakistan Hebei Medical University Shijiazhuang050000 China School of Environmental Science and Engineering/Tianjin Key Lab of Biomass Waste Utilization Tianjin University Tianjin300072 China Ecotoxicology Research Program Institute of Plant and Environmental Protection National Agriculture Research Center Islamabad44000 Pakistan Department of Biomedical Biological & Chemical Engineering University of Missouri ColumbiaMO65211 United States Southern Federal University Academy of Biology and Biotechnology Rostov-on-Don344041 Russia International Joint Research Center for Intelligent Optical Sensing and Applications at Jiangnan University Wuxi214122 China

Microplastics, interacting with drought stress, have become threat to crops by altering soil environment. Currently, the effect of combined microplastic and drought stress on crop growth remain poorly understood. In this work, the mechanism of multi-stress responses was investigated under the exposure of polvinylchloride microplastic (PV) and drought (D) individually and in combination (DPV) on rice varieties Hanyou73 and Q280 through proteomics and metabolomic analysis. All treatments negatively affect chlorophyll content, antioxidant enzyme activities, rice grain composition, metabolome and proteomic profiling of both rice varieties. Full rice grain yield was decreased under all treatments except PV treatment in which it was increased in both rice varieties. DPV treatment shows the lowest grain yield and more adverse effects on metabolome by affecting glycerophospholipid metabolism, tryptophan metabolism and alanine, aspartate and glutamate metabolism. Soluble sugar contents were decreased in H73 but in Q280 increased by 159 % under DPV and 123 % in PV treatment, compared to their control group. The results from metabolomics illustrate that glycerophospholipid metabolism is commonly altered in both rice types under all treatments. PV and drought alone and in combination induce extensive alterations in proteomics of rice leaves especially impacting proteins related to binding, translation and photosynthetic process. The results reveal that PV and DPV treatments highly distort the abundance of metabolites and proteins in both rice types, demonstrating that microplastic toxicity effects on rice plants become more severe when combined with drought stress. © 2024 Elsevier B.V.

关键词： Drought Metabolite Polyvinyl chloride microplastic Protein Rice

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On the Ft-Icr Mass Spectrometry Analysis of Dissolved Organic Matter Released by Adsorbent During Coal chemical Wastewater Treatment

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SSRN 2024年

作者： Wei, Qi Chen, Cai Ma, Hong-Peng Liu, Tao Liu, Bing Wang, Tian-Xiang Zhang, Sen Yang, Dan-Hui Lv, Wen-Jie Wang, Hua-Lin National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Key Laboratory of Special Functional and Smart Polymer Materials Ministry of Industry and Information Technology Northwestern Polytechnical University Shaan Xi 710072 China Methanol to Olefins Center Shaanxi Yanchang Petroleum Yan'an Energy Chemical Co. Ltd. Shaan Xi 727500 China

This study analyzed the dissolved organic matter (DOM) released by adsorbent during wastewater treatment. It was found that the adsorption method resulted in an organic removal efficiency of over 97% for coal-to-olefin (CTO) wastewater, with the lowest value of 15.7 mg/L. The Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) detected 4111 DOM in the wastewater, 4052 remaining DOM after first-stage anthracite (ANC) adsorption, and 1013 after second-stage macroporous adsorption resin (MAR). The removal degree of lipids in wastewater was the highest, followed by proteins and lignin. During the adsorption process, the proportion of halogenated compounds (HCs) declined from 59.86% to 38.63% and 21.67%. Additionally, freshly produced 2035 and 311 DOMs were found in the adsorption effluent of ANC and MAR, respectively, with HCs accounting for 34.71% and 67.96%. Upon flowing ultra-pure water through ANC and MAR, the effluent dissolved organic carbon (DOC) ranges were 1.118-3.574 mg/L and 1.014-2.557 mg/L, respectively. There were 159 and 131 kinds of DOM detected, respectively, with HCs content of 59.06% and 45.02%. Comparative experiments revealed the complex components of the wastewater promoting the release of organic matter on the adsorbent surface that further reacted to generate organic matter. However, fewer substances were released by the adsorbent. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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The Efficient Capture of Polysaccharides in Tetradesmus Obliquus of Indole-3-Acetic Acid Coupling Sludge Cextraction

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SSRN 2023年

作者： Yu, Jiayu Ding, Biao Li, Renjie Chen, Xiurong Yin, Danning Song, Meijing Ye, Xiaoyun National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

Polysaccharide is an important biomass of algae. The sludge extract is beneficial to the enrichment of polysaccharide due to the abundance of organic matter, while its organic toxicity has an inhibitory effect on algae. To overcome inhibition and improve polysaccharide enrichment,, Tetradesmus obliquus were cultured with sludge extract with different indole-3-acetic acid (IAA) concentrations. Within 30 days of culture cycle, T. obliquus showed in good condition at the IAA dosage content of 10-6 M, the maximum cell density and dry weight were respectively (106.78 ± 2.20) × 106 cell/mL and 2.941 ± 0.067 g/L while the contents of chlorophyll-a, chlorophyll-b and carotenoid were 1.79, 1.91 and 2.80 times that of blank group, respectively. The highest polysaccharide accumulation was obtained under this culture condition, reaching 533.15 ± 21.11 mg/L on the 30th day, which was 2.49 times of that in blank group. Proteomic showed that the up-regulation of A0A383WLM8 promoted the light capture capacity, A0A383WMJ2 and A0A249RWW6 enhanced the accumulation of NADPH and ATP. The up-regulation of A0A383WMK4 promoted the fixation of carbon dioxide and thus the accumulation of polysaccharide. Above findings provide new insights into the mechanism of sludge toxicity removal of T. obliquus and the enhancement of polysaccharide accumulation effect under different concentrations of IAA. © 2023, The Authors. All rights reserved.

关键词： pH

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Indole-3-Acetic Acid Mediated Removal of Sludge Toxicity by Microalgae: Focus on the Role of Extracellular Polymeric Substances

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SSRN 2023年

作者： Li, Renjie Song, Meijing Yin, Danning Ye, Xiaoyun Yu, Jiayu Chen, Xiurong National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

The use of indole-3-acid (IAA) as an additive aided in achieving the objectives of reducing sludge extract toxicity, increasing Tetradesmus obliquus biomass yield, and enhancing extracellular polysaccharide production. Proteomics analysis can unveil the microalgae's response mechanism to sludge toxicity stress. With 10-6 M IAA addition, microalgae biomass reached 3.426 ± 0.067 g/L. Sludge extract demonstrated 78.3 ± 3.2% total organic carbon removal and 72.2 ± 2.1% toxicity removal. Extracellular polysaccharides and proteins witnessed 2.08 and 1.76-fold increments, respectively. Proteomic analysis indicated that Tetradesmus obliquus directed carbon sources towards glycogen accumulation and amino acid synthesis, regulating pathways associated with carbon metabolism (glycolysis, TCA cycle, and amino acid metabolism) to adapt to the stressful environment. These findings lay the groundwork for future waste sludge treatment and offer novel insights into microalgae cultivation and extracellular polysaccharide enrichment in sludge. © 2023, The Authors. All rights reserved.

关键词： Toxicity

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Analysis of the Regulatory Mechanism of Exogenous Iaa-Mediated Tryptophan Accumulation and Synthesis of Endogenous Iaa in Chlorococcum Humicola

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SSRN 2023年

作者： Chen, Xiurong Ye, Xiaoyun Yu, Xiao Zhao, Jiamin Song, Meijing Yin, Danning Yu, Jiayu National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

The activated sludge method is widely used for the treatment of phenol-containing wastewater, which gives rise to the problem of toxic residual sludge accumulation. Indole-3-acetic acid (IAA) as a typical phytohormone can promote the removal of toxicity and the accumulation of biomass by microalgae. Proteomics analysis can reveal the mechanism of microalgae response to exogenous IAA. The results showed that the IAA concentration of 5×10-6 mol/L was most beneficial for Chlorococcum humicola to cope with the toxic stress in the sludge extract medium, enhance the antioxidant capacity and promote rubisco enzyme expression, and finally, it accumulated 1.57 times more protein than the control group. Exogenous IAA altered the relative abundance of various amino acids in Chlorococcum humicola cells, and proteomic analyses showed that exogenous IAA stimulated the algal cells to produce more IGP, indole, and serine, and tryptophan synthase (A0A383V983) was significantly up-regulated. IGP and serine were converted to tryptophan under the regulation of tryptophan synthase, and tryptophan served as a precursor for the synthesis of endogenous IAA, which also formed a promotional effect on the growth of Chlorococcum humicola. These findings have important implications for the treatment of toxic residual sludge while enriching for high-value amino acids. © 2023, The Authors. All rights reserved.

关键词： Microalgae

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A Binary Dumbbell Visible Light Driven Photocatalyst for Simultaneous Hydrogen Production with the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

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SSRN 2024年

作者： Tayyab, Muhammad Mansoor, Seemal Akmal, Zeeshan Khan, Mazhar Zhou, Liang Lei, Juying Zhang, Jinlong Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai200237 China Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Guangdong Shenzhen518055 China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China

Photocatalytic H2 production with selective oxidation of organic moieties in an aqueous medium is a fascinating research area. However, the rational design of photocatalysts and their photocatalytic performance are still inadequate. In this work, we efficiently synthesized the MoS2 tipped CdS nanowires (NWs) photocatalyst using soft templates via the two-step hydrothermal method for efficient H2 production with selective oxidation of benzyl alcohol (BO) under visible light illumination. The optimized MoS2 tipped CdS NWs (20% MoS2) photocatalyst exhibits the highest photocatalytic H2 production efficiency of 13.55 mmol g-1 h-1 with 99% selective oxidation of BO, which was 42.34 and 2.21 times greater photocatalytic performance than that of pristine CdS NWs and MoS2/CdS NWs, respectively. The directional loading of MoS2 at the tips of CdS NWs (as compared to nondirectional MoS2 at CdS NWs) is the key factor towards superior H2 production with 99% selective oxidation of BO and has an inhibitory effect on the photo corrosion of pristine CdS NWs. Therefore, the amazing enhancement in the photocatalytic performance and selectivity of optimized MoS2 tipped CdS NWs (20% MoS2) photocatalyst is due to the spatial separation of their photoexcited charge carriers through the Schottky junction. Moreover, the unique structure of MoS2 flower at the tip of 1D CdS NWs offers separate active sites for adsorption and surface reactions such as H2 production at the MoS2 flower (confirmed by Pt photo deposition) and subsequently the selective oxidation of BO at the stem of CdS NWs. This rational design of a photocatalyst could be an inspiring work for the further development of efficient photocatalytic system for H2 production with selective oxidation of BO (a strategy of mash two potatoes with one fork). © 2024, The Authors. All rights reserved.

关键词： Precious metals

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Effects of phosphate on the transport of graphene oxide nanoparticles in saturated clean and iron oxide-coated sand columns

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Journal of Environmental Sciences 2021年第5期33卷 80-92页

作者： Jiuyan Chen Weifeng Chen Taotao Lu Yumeng Song Haojing Zhang Mengjie Wang Xinhai Wang Zhichong Qi Minghua Lu Henan International Joint Laboratory of Medicinal Plants Utilization Henan Joint International Research Laboratory of Environmental Pollution Control MaterialsEngineering Research Center for Industrial Recirculation Water Treatment of Henan ProvinceCollege of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Nankai UniversityTianjin 300350China Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process Fujian Provincial Key Laboratory for Plant Eco-physiologyCollege of Geographical ScienceFujian Normal UniversityFujian 350007China Department of Hydrology University of BayreuthBayreuth D-95440Germany

In this study, transport behaviors of graphene oxide(GO) in saturated uncoated(i.e., clean sand) and goethite-coated sand porous media were examined as a function of the phosphate. We found that phosphate enhanced the transport of GO over a wide range of solution chemistry(i.e., pH 5.0–9.0 and the presence of 10 mmol/L Na^(+) or 0.5 mmol/L Ca^(2+)). The results were mainly ascribed to the increase of electrostatic repulsion between nanoparticles and porous media. Meanwhile, deposition site competition induced by the retained phosphate was another important mechanism leading to promote GO transport. Interestingly, when the phosphate concentration increased from 0.1 to 1.0 mmol/L, the transportenhancement effect of phosphate in goethite-coated sand was to a much larger extent than that in clean sand. The observations were primarily related to the difference in the total mass of retained phosphate between the iron oxide-coated sand and clean sand columns, which resulted in different degrees of the electrostatic repulsion and competitive effect of phosphate. When the background solution contained 0.5 mmol/L Ca^(2+), phosphate could be bind to sand/goethite-coated sand surface by cation bridging;and consequently, promoted competition between phosphate and nanoparticles for deposition sites, which was an important mechanism for the enhanced effect of phosphate. Moreover, the DLVO theory was applicable to describe GO transport behaviors in porous media in the absence or presence of phosphate. Taken together, these findings highlight the important status and role of phosphate on the transport and fate of colloidal graphene oxide in the subsurface environment.

关键词： Graphene oxide Phosphate Goethite Transport Sand

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