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SSRN 2023年

作者： Jiao, Zhaoyu Yu, Nanyang Mao, Jiadi Jiao, Liping Wang, Xuebing Shi, Wei Yu, Hongxia Wei, Si State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Third Institute of Oceanography Ministry of Natural Resources Xiamen China

Numerous emerging per- and polyfluoroalkyl substances (PFASs) occur in the aquatic environment, posing a threat to aquatic ecosystems and human health. In this study, we conducted a nontarget analysis on 3 surface water samples and 92 tissue samples of 16 fish collected from the Yangtze River to investigate the patterns, tissue distribution, and environmental impacts of legacy and emerging PFASs. A total of 43 PFASs from 11 classes were identified, including 17 legacy PFASs and 26 emerging PFASs. Among the 43 PFASs, seven PFASs were reported in biota for the first time while five PFASs were reported in the environment for the first time. Chlorine substituted perfluoroalyl ether sulfonic acids were the major emerging PFASs detected in organisms. Our results showed that most PFASs tended to bioaccumulate in the liver, whereas perfluorinated sulfonamides tended to accumulate in the blood. Method for evaluating the persistence, bioaccumulation and toxicity (PBT) of PFASs were developed by combining the in-silico methods and experimental data. Long-chain PFASs were found to have extremely higher PBT scores than short-chain PFASs. Additionally, most emerging PFASs exhibited comparable PBT characteristics with legacy PFASs, especially Cl-substituted PFASs. © 2023, The Authors. All rights reserved.

关键词： Ethers

Electron-Transfer Mediated Peroxymonosulfate Activation Through Monoatomic Fe-Pyridinic N4 Moiety in Biochar-Based Catalyst for Electron-Rich Pollutants Degradation in Groundwater

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SSRN 2024年

作者： Zhou, Ting Wang, Hongjie Dong, Wenyi Du, Tianxing Li, Xuechuan Wang, Feifei Zhao, Zilong School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Shenzhen518055 China

pollution of groundwater by electron-rich refractory organic pollutants (e-ROPs) is detrimental to ecological integrity and human health. Biochar (BC)-based single-atom Fe catalysts (Fe-SACs) to trigger nonradical peroxymonosulfate (PMS) process has shown great potential in addressing this problem. Nevertheless, the successful formation and precise regulation of active sites on BC remain a formidable challenge. Herein, co-pyrolysis of BC derived from shrimp shells and N-containing supramolecular organic frameworks with a hexagonal cavity structure of Fe3+-N3 (Fe-SOFs) was, for the first time, used for the preparation of an efficient and inexpensive BC-based Fe-SAC (Fe-MCA@SS). The Fe-N bond was successfully grafted from Fe-SOFs onto BC and subsequently transformed into monoatomic Fe-pyridinic N4. Moreover, Fe-MCA@SS successfully triggered an efficient nonradical PMS process, degrading 94.5% of aniline (AN) within 5 min. Mediated electron transfer mechanism (MET) was uppermost responsible for AN mineralization, and the synergistic effect of the stronger chemical adsorption of PMS with Fe atom in Fe-pyridinic N4 active sites, higher redox potential of [Fe-MCA@SS/PMS]* and larger LUMO of it than HOMO of AN was the mechanism evoking MET. This study sheds new light on the preparation of pollution-free and affordable BC-based SACs with efficient nonradical PMS activation ability and an excellent feasibility with respect to application in the decontamination of groundwater. © 2024, The Authors. All rights reserved.

关键词： Catalysts

Enhancing Biological Conversion of No to N2o by Utilizing Thermophiles Instead of Mesophiles

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SSRN 2023年

作者： Li, Dan Sun, Zhuqiu Luo, Ga Lu, Lichao Zhang, Shaobo Xi, Jinying Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China Beijing Capital Sludge Disposal Technology Co. LTD Beijing100044 China

Recently, production of nitrous oxide (N2O) from biological denitrification of nitric oxide (NO) in flue gases have been reported and drawn more attention. Although the temperature of flue gas after desulfurization is usually 45-70℃, all previous studies carried out the denitrification of NO under mesophilic conditions. In this study, biological conversion of NO to N2O were performed under both mesophilic and thermophilic conditions (35–50 ℃). The results showed that temperature has a great impact on N2O production and a maximum conversion efficiency from NO to N2O of 82% was achieved at 45 ℃, which is higher than the reported conversion (24-71%). Both reductase (NOR) and nitrous oxide reductase (N2OR) activities were inhibited by increased temperature, while N2OR inhibition was more significant. The Biolog test results showed that microbial communities at 40 and 45 ℃ had greater carbon source metabolising capacities than those at 35 and 50 ℃. High-throughput sequencing showed that species richness and diversity decreased significantly with increased temperature. Additionally, redundancy analysis showed that the genus Enterococcus, Clostridium, Romboutsia, and Streptococcus were closely related to NO denitrification and N2O production. LEfSe analysis showed that Streptococcus was the key distinguished microorganism between the 45 ℃ sample and others. The results in this study demonstrated that biological production of N2O from NO in flue gas could be more efficient and promising under thermophilic condition (45 ℃). © 2023, The Authors. All rights reserved.

关键词： Nitric oxide

Deciphering Changes in the Abundance of Intracellular and Extracellular Antibiotic Resistance Genes and Mobile Genetic Elements Under Anaerobic Fermentation: Driven by Bacterial Community

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SSRN 2022年

作者： Yu, Peng Dong, Peiyan Wang, Hui State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China The Key Laboratory of Water and Sediment Sciences Ministry of Education College of Environmental Sciences and Engineering Peking University Beijing100871 China

In this study, the effects of initial pH values (3, 5, 7, 11) on intracellular and extracellular antibiotic resistance genes (iARGs and eARGs) and mobile genetic elements (MGEs) during anaerobic fermentation of swine manure were investigated. The results demonstrated that the initial pH during fermentation was acidic (pH 3 and 5), which was conducive to the removal of six eARGs and seven iARGs . Similarly, intracellular and extracellular MGEs were effectively reduced with an initial pH of 3 and 5. The abundance of MGEs and four ARGs were enriched with an initial pH of 7 and 11. The redundancy analysis (RDA) indicated that pH values and microbial communities were correlated with the change of ARGs . Acidic conditions can significantly reduce the diversity and abundance of the microbial community, resulting in the elimination of MEGs and ARGs. These findings are critical for risk assessment and management of ARGs. © 2022, The Authors. All rights reserved.

关键词： Microorganisms

Inhibition character of crotonaldehyde manufacture wastewater on biological acidification

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Frontiers of environmental Science & Engineering 2021年第6期15卷 293-302页

作者： Tao Liu Yudong Song Zhiqiang Shen Yuexi Zhou State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Research Center of Environmental Pollution Control Engineering Technology Chinese Research Academy of Environmental SciencesBeijing 100012China School of Environment Tsinghua UniversityBeijing 100084China

This work aims to investigate the inhibitory effect of crotonaldehyde manufacture wastewater(CMW)on biological *** reveal the inhibitory effect of wastewater to the anaerobic granular sludge(AnGS),variations of the specific acidogenic activity(SAA)and activities of key enzymes were *** results indicated that the dosage of CMW causing a 50%effect concentration(EC50)on the activity of total volatile fatty acids(TVFA)production was 380 mg COD/g *** inhibitory effect of individual toxicants in CMW on the activity of TVFA production were in the order of crotonaldehyde>ethyl sorbate>(E,E)-2,4-hexadienal,and their inhibitory degrees on individual VFA productions were acetic acid(Ac)>n-butyric acid(n-Bu),which could correspond to the variations in the activities of acetate kinase(AK)and butyrate kinase(BK).Furthermore,the combined effect of three toxicants on the activity of TVFA production was significantly higher than that of any individual toxicant,and the contribution of the relative toxicity to CMW was 77.27%.Additionally,the biodegradation products of the main toxicants indicated that the removal of crotonaldehyde and(E,E)-2,4-hexadienal was primarily due to the hydrogenation of alkene and aldehyde and the oxidation of ***,the removal of ethyl sorbate was primarily based on *** conclusion,biological acidification has a limited ability to treatment CMW,therefore,a further pretreatment technology should be used to remove the main toxicant of wastewater.

关键词： Crotonaldehyde manufacture wastewater Biological acidification Volatile fatty acids Inhibition Toxic units

Waste food reduction as a way to reduce resources and energy consumption in the Italian industrial sector: An IO-LCA analysis

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Waste food reduction as a way to reduce resources and energy...

2020 Applied Energy Symposium (ICAE), 100RES 2020

作者： Bartocci, Pietro Yang, Qing Zhou, Hewen Chen, Bin Fantozzi, Francesco Department of Engineering University of Perugia Perugia Italy China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Wuhan China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China

Food production involves both agricultural and industrial activities which consume several resources among which: water, energy, land, minerals and chemicals. The efficiency in the use of the resources depends on the type of food which is produced and the adopted processes. In any case if food is discarded or lost at any step of the supply chain this represents a waste of energy and resources. For this reason, the LIFE project irexfo, coordinated by the University of Perugia has proposed a way to promote a business model aiming at both: the reduction of food losses and also the reuse of the not comestible food waste in biogas plants. The model has been tested in Umbria as a pilot region and in this study the results obtained are scaled up to a national level and applied to the Italian IO database reported in the EXIOBASE, to evaluate which could be the benefits of the application of the irexfo business model to the whole Italian agroindustry sector and also the interrelations between this sector and the Italian energy sector. The analysis is performed using SimaPro software 9.0, results are compared with those of similar studies which have been performed at European level. This is the first study of this kind focused on Italy. © The Authors, published by EDP Sciences, 2021.

关键词： Supply chains

The effects of phosphorus on the fate and transformation of sediment-associated cadmium from river sediments

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Science of the Total environment 2024年 957卷 177812页

作者： Xu, Fen Liao, Yuhui Bai, Shihao Yang, Rui Li, Yaoming Yuan, Jianfei State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu610059 China College of Ecology and Environment Chengdu University of Technology Chengdu610059 China State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution Chengdu University of Technology Chengdu610059 China Chengdu610218 China

The coexistence of phosphorus (P) and cadmium (Cd) in river sediments poses a significant challenge for remediating these contaminants in aquatic environments, given the ongoing debates regarding their interactions. This study aimed to elucidate the impact of water-soluble phosphorus (PO43−) on the fate and transformation of sediment-associated Cd under varying conditions. The findings revealed that the impact of PO43− on the release of sediment-associated Cd depends on the presence or absence of cations such as Ca2+ and Mg2+, with Ca2+ exerting a more pronounced effect than Mg2+. In the absence of Ca2+ and Mg2+, PO43− effectively inhibits the release of sediment-associated Cd by facilitating the formation of more stable precipitates, including (Cd)3(PO4)2. Conversely, when Ca2+ and Mg2+ are present, they compete with Cd for PO43− binding sites, reducing the formation of (Cd)3(PO4)2 and indirectly enhancing the release of sediment-associated Cd. Furthermore, redox conditions play a significant role in Cd release from sediments depending on its fractions. However, this influence may be less prominent compared to that caused by PO43−. Notably, increasing sediment ageing time diminishes the enhancing effect exerted by PO43−, likely attributed to the conversion of Cd into a more stable residual fraction. This study offers further insights into the impact of PO43− on the fate and transformation of sediment-associated Cd within river sediments, necessitating simultaneous consideration of multiple variables such as cations, redox conditions, and sediment ageing. © 2024

关键词： Rivers

Fine-scale activity patterns of large-and medium-sized mammals in a deciduous broadleaf forest in the Qinling Mountains,China

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Journal of Forestry Research 2021年第6期32卷 2709-2717页

作者： Yuke Zhang Xiangbo He Xuehua Liu Melissa Songer Haishan Dang Quanfa Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control and School of Environment Tsinghua UniversityBeijing 100084People’s Republic of China Foping Nature Reserve Foping CountyShaanxi 723400People’s Republic of China Conservation Ecology Center Smithsonian Conservation Biology InstituteFront RoyalVA 22630USA Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden of the Chinese Academy of SciencesWuhan 430074People’s Republic of China

The composition of animal species and interactions among them are widely known to shape ecological communities and fine-scale(e.g.,<1 km)monitoring of animal communities is essential for understanding the relationships among animals and *** the co-existence of large-and medium-sized species has been studied across different scales,research on fine-scale interactions of herbivores in deciduous broadleaf forests is *** trapping of large-and medium-sized mammals was carried out over a 1 year period within a 25 ha deciduous broadleaf forest dynamics plot in the Qinling Mountains,*** species of large-and medium-sized mammals,including six carnivores,six ungulates,one primate and one rodent species were *** density estimations were used to analyse the diel or 24 h activity patterns of all species with more than 40 independent detections and general linear models were developed to explore the spatial relationships among the *** combination of overlapping diel activity patterns and spatial associations showed obvious niche separation among six species:giant panda(Ailuropoda melanoleuca David),takin(Budorcas taxicolor Hodgson),Reeves’s muntjac(Muntiacus reevesi Ogilby),tufted deer(Elaphodus cephalophus Milne-Edwards),Chinese serow(Capricornis milneedwardsii David)and wild boar(Sus scrofa Linnaeus).Long-term fine-scale monitoring is useful for providing information about the co-existence of species and their *** results demonstrate the importance for fine-scale monitoring of animals and plants for improving understanding of species interactions and community dynamics.

关键词： Large-and medium-sized mammals Fine-scale interaction Camera trapping Spatiotemporal patterns Forest dynamics plots Qinling mountains

Long-Term Fe Transformation Decreases the Adsorption But Enhances the Reduction of Cr(Vi) by Humic Substance-Ferric Iron Coprecipitates

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SSRN 2024年

作者： Wang, Hui Liu, Fengping Zhang, Yankun Gong, Xueying Zhu, Jinqi Tan, Wenbing Yuan, Ying Zhang, Jia Chen, Honghan Xi, Beidou State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Key Laboratory of Water Resources & Environmental Engineering China University of Geosciences Beijing100083 China Chinese Academy for Environmental Planning Beijing100020 China

Humic substance (HSs)-Fe(III) coprecipitates are widespread in soil and aquifers, undergoing transformation throughout their presence. However, the mechanisms of their transformation, and the influence on the environmental behavior of HSs-Fe(III) coprecipitates remain unclear. Here, the transformation of HS-Fe(III) coprecipitates was simulated to investigate the role in the adsorption and reduction of a hazardous pollutant, Cr(VI). The capacity of HSs-Fe(III) coprecipitates to adsorb/reduce Cr(VI) was found to depend on their structure. In ferrihydrite (Fh)-like coprecipitates, the amorphous Fh transformed into crystalline hematite and goethite, accompanied by a decrease in specific surface area and active sites, thereby decreasing the Cr(VI) adsorption capacity. However, this transformation enhanced the surface catalysis of Fe-containing components, which increased the number of functional groups activated for Cr(VI) reduction. In HSs-like coprecipitates, Fe(III) always served as a cation bridge connecting the HS molecules, but became reduced by the associated HSs. The produced Fe(II) acted as an adsorption-reduction site, driving the increasing reduction of the adsorbed Cr(VI) as the transformation progressed. Our findings emphasize the pivotal role of long-term transformation in boosting the capacity of HSs-Fe(III) coprecipitates to reduce Cr(VI). This insight may open a new avenue for the development of in-situ remediation agents for Cr(VI)-contaminated sites. © 2024, The Authors. All rights reserved.

关键词： Adsorption

Ultrathin covalent organic framework nanosheet-based photoregulated metal-free oxidase-like nanozyme

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Nano Research 2022年第10期15卷 8783-8790页

作者： Yongwu Peng Minchu Huang Liangjun Chen Chengtao Gong Nanjun Li Ying Huang Changming Cheng College of Materials Science and Engineering and College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics(CAEP)Mianyang 612900China Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource Yancheng Teachers UniversityYancheng 224007China

The exploration of low-cost and metal-free nanozymes with oxidase-mimicking activity is highly desired due to their attractive properties and potential ***,it is still challenging and remains unexploited to fully realize oxidase-like nanozyme in the emerging covalent organic frameworks(COFs)due to their polymeric nature and weak photoelectric *** herein report the first example of the preparation and oxidase-mimicking activity of novel ultrathin two-dimensional(2D)COF(termed as TTPA-COF)*** ultrathin TTPA-COF nanosheets with hexagonal layered structure are constructed from two flexible photoactive(diarylamino)benzene-based linkers,and exhibit remarkable catalytic activity toward the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)in the presence of O_(2) due to their large specific surface areas and abundant active ***,it is worth noting that the nanozyme activity could be regulated by external light *** on the oxidasemimicking activity of TTPA-COF nanosheets,a green colorimetric sensor is proposed for the sensitive and selective determination of glutathione(GSH)in a wide linear range of 0.5–40μM with a detection limit of 0.5μ*** work reported here would open new avenues for the exploration of low-cost and high-efficiency nanozymes,as well as extend the application of 2D COF nanosheets in the fields of catalysis and sensing.

关键词： covalent organic framework nanosheets ultrathin photoregulated metal-free oxidase mimics