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SSRN 2023年

作者： Wang, Min Wu, Song Lu, Yilin Wu, Haotian Si, Dunfeng Zhou, Dongmei State Key Laboratory of Pollution Control & Resources Reuse School of the Environment Nanjing University Nanjing210023 China

The extensive usage of ammonium sulfate as the leaching agent to extract rare earth elements led to widespread ammonia nitrogen (NH4+-N) pollution in the tailing soils of ion-adsorbed rare earth deposits in southern China. However, the cost-effective technologies to tackle with the long-term retention of NH4+-N in the rare earth mining soil have been largely unresolved. In this study, we developed a cost-effective approach to activate soil nitrification by the co-application of alkaline materials and organic fertilizer. The co-application of 0.3% of organic fertilizer and 0.1%~0.2% of CaO or MgO or Mg(OH)2 stimulated a soil NH4+-N removal rate of 2.01~7.58 mg kg-1 d-1 and a soil NO3-N accumulation rate of 1.56~7.09 mg kg-1 d-1. Noting that only if the soil pH was elevated to 8.00~9.00, the NH4+-N removal rate and NO3-N accumulation rate were dependent on the acid neutralization capacity of the alkaline materials. The application of CaCO3 could not stimulate soil nitrification due to the soil pH was uncapable to be elevated to above 7.5. The qPCR, amplicon sequencing, and nitrification inhibitor batch incubation results demonstrated that organic fertilizer supplied active ammonia-oxidizing bacteria Nitrosomonas europaea. The proliferation of Nitrosomonas europaea in the alkaline materials and organic fertilizer co-applied soil was responsible for the soil nitrification. Furthermore, the application of commercial denitrifying bacteria inoculum promoted the removal of accumulated NO3-N. The findings of this study provide a lost-cost technology to remove NH4+-N from the rare earth mining soil. (Image Presented) © 2023, The Authors. All rights reserved.

关键词： Rare earths

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Insights into the Role of Vocs Properties on Desorption Behaviors of Two Porous Polymeric Resins

SSRN

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SSRN 2023年

作者： Liu, Huijuan Yu, Yansong Yang, Zemin Liu, Zhimin Long, Chao School of Eco-Environment Hebei University Baoding071002 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Desorption is a critical process in the recovery or post-treatment of adsorbents saturated with volatile organic compounds (VOCs). In this study, the thermal desorption behaviors for eight VOCs on hypercrosslinked polymeric resin (HPR) and macroporous polymeric resin (MPR) were investigated through isothermal desorption and temperature programmed desorption (TPD). Compared with MPR, HPR with more micropores exhibited a lower desorption rate constant, lower desorption efficiency and higher desorption activation energy due to the strong binding energy generated between VOCs molecules and narrow micropores. As the polarizability of VOCs increased, the desorption rate constants on two porous polymeric resins decreased, while the desorption activation energy showed an incremental trend. Excellent linear correlations were observed between VOC polarizability and desorption rate constants (R2=0.957 for HPR and R2=0.940 for MPR) as well as between VOC polarizability and desorption activation energy (R2=0.981 for HPR and R2=0.969 for MPR). Furthermore, a polyparameter linear free energy relationship (PP-LFER) was developed to explore the influences of intermolecular interactions on desorption behaviors of VOCs on porous polymeric resins. The results indicated that the dispersive interaction, which is directly related to polarizability of VOCs, was the primary factor influencing the desorption activation energy of VOCs on porous polymeric resins. The find from this study helps evaluate fleetly and availably the desorption properties of VOCs based on their polarizability. © 2023, The Authors. All rights reserved.

关键词： Volatile organic compounds

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Insights into the Role of Vocs Properties on Desorption Behaviors of Two Porous Polymeric Resins

SSRN

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SSRN 2023年

作者： Liu, Huijuan Yu, Yansong Long, Chao School of Eco-Environment Hebei University Baoding071002 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

关键词： Volatile organic compounds

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Revisiting the measurements and interpretations of DLVO forces

arXiv

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arXiv 2024年

作者： Feng, Bo Liu, Xiantang Liu, Xinmin Li, Yingli Li, Hang Chongqing Key Laboratory of Soil Multi-Scale Interfacial Processes College of Resources and Environment Southwest University Chongqing400715 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The DLVO theory and electrical double layer (EDL) theory are the foundation of colloid and interface science. With the invention and development of surface forces apparatus (SFA) and atomic force microscope (AFM), the measurements and interpretations of DLVO forces (i.e., mainly measuring the EDL force (electrostatic force) FEDL and van der Waals force FvdW, and interpreting the potential ψ, charge density σ, and Hamaker constant H) can be greatly facilitated by various surface force measurement techniques, and would have been very promising in advancing the DLVO theory, EDL theory, and colloid and interface science. However, although numerous studies have been conducted, pervasive anomalous results can be identified throughout the literature, main including: (1) the fitted ψ/σ is normally extremely small (ψ can be close to or (much) smaller than ψζ (zeta potential)) and varies greatly;(2) the fitted ψ/σ can exceed the allowable range of calculation;and (3) the measured FvdW and the fitted H vary greatly. Based on rigorous and comprehensive arguments, we have reasonably explained the pervasive anomalous results in the literature and further speculated that, the pervasive anomalous results are existing but not noticed and questioned owing to the two important aspects: (1) the pervasive unreasonable understandings of EDL theory and (2) the commonly neglected systematic errors. Consequently, we believe that the related studies have been seriously hampered. We therefore call for reexamination and re-analysis of related experimental results and theoretical understandings by careful consideration of the EDL theory and systematic errors. On these bases, we can interpret the experimental results properly and promote the development of EDL theory, colloid and interface science, and many related fields. Copyright © 2024, The Authors. All rights reserved.

关键词： Systematic errors

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Synergistic effect of oxygen vacancies and edging/corner-connected MnOs structural motifs in multi-dimensional manganese oxides to enhance OvOCs catalytic oxidation

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Chinese Chemical Letters 2023年第12期34卷 291-299页

作者： Yonggang Sun Ganggang Li Jie Cheng Na Li Xin Xing Xin Zhang Zhongshen Zhang State Key Laboratory of High-eficiency Coal Utilization and Green Chemical Engineering School of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China National Engineering Laboratory for VOCs pollution Control Material&Technology Research Center for Environmental Material and Pollution Control TechnologyUniversity of Chinese Academy of SciencesBeijing 101408China College of Resources and Environment University of Chinese Academy of SciencesBejing 101408China

The structure-activity relationships for vinyl acetate catalytic oxidation are challenging to explore at the atomic scale due to the ambiguity of the structural defect types and sites of manganese *** work elaborates,at the atomic level,through in-situ experimental and theoretical methods,the synergistic effects of two types of structural defect sites of Vo-e(edge-sharing oxygen)and Vo-c(corner-sharing oxygen)and MnO6 structural motifs of manganese ***-dimensional manganese oxides,namely those with corner-connected MnOs structural motifs and Vo-c structural oxygen defect sites,significantly improved the activation of vinyl *** of enol structure formation,acetate and formate intermediate species,and tautomerism between enol structure and acetaldehyde were detected when oxygen vacancies of manganese oxides were present in combination with corner/edge-connected ***,the activation of chemical bonds and deep catalytic oxidation of vinyl acetate depend on the presence of a redox couple,surface oxygen species,and weakened Mn-O *** provides a valuable notion for investigating and designing catalytic systems and reaction processes for the purpose of emission reduction and the management of environmental contaminants.

关键词： Oxygen vacancies Synergistic effects MnO_(6)structural motifs In-situ technologies Catalytic oxidation

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Oligomers from the Synthetic Polymers:Another Potential Iceberg of New Pollutants

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environment & Health 2023年第4期1卷 228-235页

作者： Changzhi Shi Mengjing Wang Zimeng Wang Guangbo Qu Wei Jiang Xiangcheng Pan Mingliang Fang Department of Environmental Science and Engineering Fudan UniversityShanghai 200433China School of Energy and Environment and State Key Laboratory of Marine Pollution City University of Hong KongHong Kong 999077China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China Institute of Eco-Chongming Shanghai 202162China

pollution generated by synthetic polymers,particularly plastics,has become a significant global environmental ***,when compared to polymer-derived products like microplastics,oligomers have not received the attention they *** are by-products of polymer production and intermediates of *** the industrial advancements leading to an exponential increase in the production of new polymers,a majority of oligomers have remained inadequately *** the exposure and toxic effects of polylactic acid oligomers have been documented,the structures and fundamental properties of oligomers derived from most polymers are still poorly *** knowledge gap presents challenges in establishing effective analytical *** the potential of oligomers to act as new pollutants,it is imperative to investigate their environmental behavior,as well as their absorption,distribution,metabolism,excretion,and toxicity(ADMET)*** perspective highlights the research gap concerning oligomers.

关键词： oligomers polymers microplastic new pollutants ADMET

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The effects of climate warming on microbe-mediated mechanisms of sediment carbon emission

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Journal of environmental Sciences 2023年第7期129卷 16-29页

作者： Weiwei Lü Haoyu Ren Wanchang Ding He Li Xin Yao Xia Jiang College of Water Sciences Beijing Normal UniversityBeijing 100875China State Key Laboratory of Environmental Criteria and Risk Assessment National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration TechnologyChinese Research Academy of Environmental SciencesBeijing 100012China School of Environment and Planning University of LiaochengLiaocheng 252000China

Due to significant differences in biotic and abiotic properties of soils compared to those of sediments,the predicted underlying microbe-mediated mechanisms of soil carbon emissions in response to warming may not be applicable for estimating similar emissions from inlandwater *** addressed this issue by incubating different types of sediments,(including lake,small river,and pond sediments)collected from 36 sites across the Yangtze River basin,under short-term experimentalwarming to explore the effects of climatewarming on sediment carbon emission and the underlying microbe-mediated *** results indicated that under climate warming Cc emissions were affected more than CH_(4) emissions,and that pond sediments may yield a greater relative contribution of CO_(2) to total carbon emissions than lake and river ***-induced CO_(2) and CH_(4) increases involve different microbe-mediated mechanisms;Warming-induced sediment CO_(2) emissions were predicted to be directly positively driven by microbial community network modularity,which was significantly negatively affected by the quality and quantity of organic carbon and warming-induced variations in dissolved oxygen,Conversely,warminginduced sediment CH_(4) emissionswere predicted to be directly positively driven bymicrobial community network complexity,which was significantly negatively affected by warminginduced variations in *** findings suggest that biotic and abiotic drivers for sediment CO_(2) and CH_(4) emissions in response to climate warming should be considered separately when predicting sediment organic carbon decomposition dynamics resulting from climate change.

关键词： Inland water sediments Temperature sensitivity Carbon emission Microbe-mediated mechanism Short-term experimental warming

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Nucleophilic Substitution Polymerization-Induced Emission of 1,3-Dicarbonyl Compounds as a Versatile Approach for Aggregation-Induced Emission Type Non-Traditional Intrinsic Luminescence

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Chinese Journal of Chemistry 2023年第14期41卷 1705-1712页

作者： Yu-Jiao Chen Meng-Qin Pu Liang-Tao Wu Xiao-Li Sun Wen-Ming Wan College of Environment and Resources Engineering Research Center of Polymer Green Recycling of Ministry of EducationFujian Key Laboratory of Pollution Control&Resource ReuseFujian Normal UniversityFuzhouFujian350007 China Key Laboratory of Coal to Ethylene Glycol and Its Related Technology State Key Laboratory of Structural ChemistryCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of MatterChinese Academy of Sciences155 Yangqiao Road WestFuzhouFujian350002 China College of Chemistry and Materials Science Fujian Normal UniversityFuzhouFujian350007 China

Nucleophilic substitution reaction and 1,3-dicarbonyl compounds play significant roles in organic chemistry, and non-traditional intrinsic luminescence (NTIL) has become an emerging research area. Here, we demonstrate the successful nucleophilic substitution polymerization of 1,3-dicarbonyl compounds, including acetylacetone, 3,5-heptanedione, methyl acetoacetate, cyclopentane-1,3-dione, 1,3-indandione, 1-phenyl-1,3-butanedione and dibenzoylmethane, where reactive hydrogens at α position of 1,3-dicarbonyl compounds are involved. Through this base catalyzed nucleophilic substitution polycondensation between 1,3-dicarbonyl compounds and α,α’-dibromo xylene, a series of nonconjugated poly(1,3-dicarbonyl)s have been successfully prepared with high yield (up to >99%) under mild conditions. Investigations reveal that this nucleophilic substitution polycondensation exhibits self-accelerating effect and flexible stoichiometry characteristics, which exhibits advantages over traditional polycondensation methods. This polymerization also exhibits intriguing polymerization-induced emission (PIE) characteristics, where nonconjugated poly(1,3-dicarbonyl)s exhibit intriguing chemical structure dependent aggregation-induced emission (AIE) type NTIL. This work therefore expands the monomer, method, chemical structure and property libraries of polymer chemistry, which may cause inspirations to polymerization methodology, PIE, AIE and NTIL.

关键词： Polymerization Luminescence Polymerization-induced emission Ketones Aggregation-induced emission

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Modelling the thresholds of nitrogen/phosphorus concentration and hydraulic retention time for bloom control in reclaimed water landscape

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Frontiers of environmental Science & Engineering 2022年第10期16卷 53-63页

作者： keying Song Shufeng Zhu Yun Lu Guohua Dao Yinhu Wu Zhuo Chen Shengnan Wang Junhan Liu Wenguang Zhou Hong-Ying Hu Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control(SMARC)School of EnvironmentTsinghua UniversityBeijing 100084China Beijing Laboratory for Environmental Frontier Technologies Beijing 100084China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Educationand School of ResourcesEnvironmental&Chemical EngineeringNanchang UniversityNanchang 330031China Research Institute for Environmental Innovation(Suzhou)Tsinghua JiangsuSuzhou 215163China

The risks posed by algal blooms caused by nitrogen and phosphorus in reclaimed water used in urban water landscapes need to be carefully *** this study,the combined effects of the nitrogen and phosphorus concentrations and the light intensity and temperature on the specific growth rates of algae were determined using Monod,Steele,and Arrhenius models,then an integrated algal growth model was *** algae biomass,nitrogen concentration,and phosphorus concentration mass balance equations were used to establish a new control model describing the nitrogen and phosphorus concentration and hydraulic retention time thresholds for algal *** model parameters were determined by fitting the models to data acquired ***,the control model and numerical simulations for six typical algae and mixed algae under standard conditions were used to determine nitrogen/phosphorus concentration and hydraulic retention time thresholds for landscape water to which reclaimed water is supplied(i.e.,for a reclaimed water landscape).

关键词： Reclaimed water landscape Algal bloom Nitrogen and phosphorus Hydraulic retention time Threshold control model

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Exogenous Application of Hesperidin Ameliorates Chromium Toxicity in Wheat Irrigated with Tannery Wastewater

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Phyton-International Journal of Experimental Botany 2025年第3期94卷 929-951页

作者： Gohar Ayoub Shafaqat Ali Muhammad Arslan Ashraf Shoaib Ahmad Mohamed A.El-Sheikh Department of Environmental Sciences Government College University FaisalabadFaisalabad38000Pakistan Department of Biological Sciences and Technology China Medical UniversityTaichung40402Taiwan Department of Botany Government College University FaisalabadFaisalabad38000Pakistan Department of Plant Biotechnology College of Life SciencesKorea UniversitySeoul02841Republic of Korea State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210023China Botany and Microbiology Department College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Chromium (Cr), a persistent soil pollutant, has detrimental effects on plants and living things, and its contamination in soil increased as a result of human-induced activities. Pakistan suffers from a lack of fresh water supplies;hence most people use metal-containing water and wastewater to irrigate their crops. Exposure to Cr toxicity, the plant reduces their morphological and physiological growth which ultimately decreases crop productivity. The current study was designed to investigate the foliar application of hesperidin (HSP) at varying effluent rates (25, 50, 75, and 100 mg L^(−1)) on wheat growth under tannery wastewater irrigated soil. Cr toxicity caused a change in the concentration of chlorophyll molecules, indicating early signs of stress. Modifications in the ultrastructure of chloroplasts, the elevated activity of chlorophyllase, and the generation of reactive oxygen species were causing the reduction in chlorophyll. Cr stress disrupted total soluble protein concentrations and the activity of antioxidation-related enzymes and NRA, suggesting the onset of oxidative stress. On the other hand, the application of HSP reduced oxidative damage by improving protein concentration (37%), chlorophyll concentration (37%), and antioxidant enzyme activity such as CAT (65%), SOD (46%), and POD (68%). Furthermore, HSP raised the concentrations of non-enzymatic antioxidant molecules, which may indicate better redox homeostasis and stress tolerance. These molecules include GSH, GSSG, ascorbic acid, flavonoids, phenolics, and anthocyanins. HSP therapy lessened the impact of Cr stress on lipid peroxidation markers. HSP enhanced these measures during the investigation. Cr stress raised the concentrations of total free amino acids and nitrogen oxide and decreased the radical scavenging activity in wheat. Cr stress raised the concentration of all soluble sugars, primarily reducing and non-reducing sugars, whereas the application of HSP strengthened these osmo protectants e

关键词： Chlorophyll concenttration foliar application hesperidin heavy metal.oxidant SPAD stress wheat crop

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