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Biosynthetic CdS-Thiobacillus thioparus hybrid for solar-driven carbon dioxide fixation

Nano Research 2023年第4期16卷 4531-4538页

作者： Guangyu Liu Feng Gao Hongwei Zhang Lei Wang Chao Gao Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale and School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science Center350 Shushanhu Rd.Hefei 230031China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Synergistically combining biological whole-cell bacteria with man-made semiconductor materials innovates the way for sustainable solar-driven CO_(2)fixation,showing great promise to break through the bottleneck in traditional chemical photocatalyst ***,most of the biohybrids require uneconomical organic nutrients and anaerobic conditions for the successful cultivation of the bacteria to sustain the CO_(2)fixation,which severely limits their economic viability and applicability for practical ***,we present an inorganic-biological hybrid system composed of obligate autotrophic bacteria Thiobacillus thioparus(***)and CdS nanoparticles(NPs)biologically precipitated on the bacterial surface,which can achieve efficient CO_(2)fixation based entirely on cost-effective inorganic salts and without the restriction of anaerobic *** optimized interface between CdS NPs and *** formed by biological precipitation plays an essential role for *** efficiently receiving photogenerated electrons from CdS NPs and thus changing the autotrophic way from chemoautotroph to *** a result,the *** biohybrid realizes the solar-driven CO_(2)fixation to produce multi-carbon glutamate synthase and biomass under visible-light irradiation with CO_(2)as the only carbon *** work provides significant inspiration for the further exploration of the solar-driven self-replicating biocatalytic system to achieve CO_(2)fixation and conversion.

关键词： biohybrids solar-driven CO_(2)fixation carbon cycle autotrophic bacteria Thiobacillus thioparus cadmium sulfide

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Consuming probiotics protects against cadmium exposure from rice consumption while promotes gut health: An assessment based on a mouse model

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Science of the Total Environment 2025年 958卷 177997页

作者： Xi, Jin-Feng Zhou, Lei Zhang, Yao-Sheng Lin, Xin-Ying Chen, Shan Xue, Rong-Yue Zhou, Dongmei Li, Hong-Bo State Key Laboratory of Pollution Control and Resource Reuse Jiangsu Key Laboratory of Vehicle Emissions Control School of Environment Nanjing University Nanjing210023 China

Cadmium (Cd) in rice constitutes a global health risk. It is crucial to develop strategies that not only reduce the bioavailability of Cd in rice but also confer additional health benefits. One potential approach involves the consumption of probiotics, which can bind Cd in the intestines and enhance gut health. The effects of consuming Akkermansia muciniphila, Bifidobacterium pseudolongum, and Psychrobacter sp. on the bioavailability of Cd in rice and gut health were evaluated using in vivo mouse bioassays and in vitro Cd immobilization assays. In mice fed Cd-contaminated rice without dietary calcium (Ca) and iron (Fe) supplementation (i.e., under conditions of mineral deficiency), the intake of these probiotics insignificantly reduced Cd accumulation in the kidneys and livers, although it did promote Cd excretion via feces. This outcome was primarily due to the competition for Ca and Fe between the probiotics and the host, which led to increased intestinal expression of Ca and Fe transporters under mineral-deficient conditions, thereby mitigating the probiotics' ability to reduce Cd bioavailability. Conversely, in mice fed Cd-contaminated rice with adequate dietary Ca and Fe (i.e., under conditions of mineral adequacy), probiotic intake significantly decreased Cd concentrations in the kidneys by 60.0 %–72.0 % compared to the control group exposed to Cd. Additionally, probiotic consumption fostered the growth of beneficial gut bacteria and strengthened intestinal tight junctions, reducing the inflammatory response in the intestines. These findings suggest that combining probiotics with sufficient Ca and Fe intake can effectively reduce dietary Cd exposure and enhance gut health. © 2024 Elsevier B.V.

关键词： Macroinvertebrates

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Boosting C_(2)H_(6)/C_(2)H_(4) separation via the precise electrostatic modulation of synthetic 1. channel at atomic level

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Nano Research 2024年第11期17卷 10083-10087页

作者： Salamanti Ainiwaner Hengcong Huang Jia-Jia Zheng Fengting Li Xue-Tong Yang Yang-Yang Guo Fangli Yuan Ming-Shui Yao Yifan Gu College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and Technology Chinese Academy of Sciences Beijing 100190 China Skate Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Chinese Academy of Sciences University of Chinese Academy of Sciences Beijing 100049 China

The regulation of gas sorption via simple pore modification is crucial to molecular recognition and chemical ***,a rational pore surface electrostatic modulation in synthetic one dimensioned(1.D)channel is demonstrated to boost ethane/ethylene(C_(2)H_(6)/C_(2)H_(4))selectivity for one-step extraction of C_(2)H_(4) from C_(2)H_(6)/C_(2)H_(4) *** the precise modulation of the surface charge arrangement with negatively charged moieties in the 1.D channel of a metal—organic framework(MOF),enhanced C_(2)H_(6)—host framework and decreased C_(2)H_(4)—host framework electrostatic interactions were obtained,which resulted in an obvious improvement in adsorption ***,the breakthrough separation performance rendered the obtained MOF an efficient adsorbent for C_(2)H_(4) purification from C_(2)H_(6)/C_(2)H_(4) *** combined detail theoretical studies prove that the gas sorption selectivity is remarkably sensitive to framework electrostatic change even in the case of pore surface modification at the atomic *** results are of fundamental importance to the design of porous materials for challenging separation tasks.

关键词： metal—organic framework ethane/ethylene separation ethane—selective MOF adsorption electrostatic modulation

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New Insights into Microplastic Contamination in Different Types of Leachates: Abundances, Characteristics, and Potential Sources

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Engineering 2024年第6期37卷 62-68页

作者： Lei Zhang Wentao Zhao Liang Zhang Zhenxiao Cai Ruiqi Yan Xia Yu Damià Barceló Qian Sui State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China PerkinElmer Inc.Shanghai 201203China Maihai Environmental Protection Technology Co. Ltd.SuzhouJiangsu 215000China Department of Environmental Chemistry Institute of Environmental Assessment and Water ResearchSpanish Council for Scientific Research(IDAEA-CSIC)Barcelona 08034Spain

Municipal solid waste(MSW)is an important destination for abandoned *** the waste disposal process,large plastic debris is broken down into microplastics(MPs)and released into the ***,current research only focuses on landfill leachates,and the occurrence of MPs in other leachates has not been ***,herein,the abundance and characteristics of MPs in three types of leachates,namely,landfill leachate,residual waste leachate,and household food waste leachate,were studied,all leachates were collected from the largest waste disposal center in *** results showed that the average MP abundances in the different types of leachates ranged from(1.9±54)to(1.88±1.4)MP particles per liter(particlesL1.and the household food waste leachate exhibited the highest MP abundance(p<0.05).Polyethylene(PE)and fragments were the dominant polymer type and shape in MPs,*** characteristic polymer types of MPs in individual leachates were ***,the conditional fragmentation model indicated that the landfilling process considerably affected the size distribution of MPs in leachates,leading to a higher percentage(>80%)of small MPs(20–1.0 lm)in landfill leachates compared to other *** the best of our knowledge,this is the first study discussing the sources of MPs in different leachates,which is important for MP pollution {1. during MSW disposal.

关键词： Microplastics Landfill leachate Residual waste leachate Household food waste leachate Source

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Degradation of odorous 2,4,6-trichloroanisole in chlorinated water by UV-LED/chlorination: kinetics and influence factors

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Environmental Science and pollution Research 2023年第15期30卷 44325-44336页

作者： Zhang, Yun-Lu Lin, Yi-Li Zhang, Tian-Yang Lu, Yong-Shan Zhou, Xiao-Yang Liu, Zhi Zheng, Zheng-Xiong Xu, Meng-Yuan 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

2,4,6-Trichloroanisole (2,4,6-TCA) has aroused a special concern for their odor problem and potential threats. In this study, the degradation of 2,4,6-TCA by UV/chlorination with different UV sources was compared, including low-pressure mercury lamp (LPUV, 254 nm) and ultraviolet light-emitting diode (UV-LED, 275 and 285 nm). The maximum removal of 2,4,6-TCA can be achieved by 275-nm UV-LED/chlorination in neutral and alkaline conditions which was 80.0%. The reaction, kinetics, and water matrix parameters on 2,4,6-TCA degradation were also evaluated. During UV-LED (275 nm)/chlorination, 2,4,6-TCA degradation was mainly caused by direct UV photolysis and indirect hydroxyl radical (HO·) oxidation, while reactive chlorine radicals (RCSs) had a negligible contribution. The second-order rate constant between HO· and 2,4,6-TCA was determined as 3.1.× 1.9 M−1.s−1. Increasing initial chlorine dosage and decreasing 2,4,6-TCA concentration or pH value significantly promoted 2,4,6-TCA degradation during UV/chlorination process. The presence of natural organic matter (NOM) and bicarbonate (HCO3−) can inhibit 2,4,6-TCA degradation, while chloride ion (Cl−) had a negligible effect. The kinetic model for 2,4,6-TCA degradation was established and validated, and the degradation pathways were proposed based on the identified intermediates. Furthermore, UV-LED (275 nm)/chlorination also exhibited a promising effect on 2,4,6-TCA removal in real water, which can be used to control 2,4,6-TCA {1. and odor problems. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Alkalinity

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The effects of Cu-phenanthrene co-contamination on adsorption-desorption behaviors of phenanthrene in soils

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Chemosphere 2024年 349卷 140954页

作者： Li, Mengting Chen, Chuze Zhang, Wei Cao, Liu Zhang, Xueqi Wang, Yuting Xian, Qiming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants in the environment, which are teratogenic, carcinogenic, and mutagenic. Co-contamination of PAHs and heavy metal commonly exists in soil. In this study, 20 types of soils with different properties in China were collected and comprehensively characterized. Phenanthrene (Phe) and Cu (II) were selected as representatives of PAHs and heavy metals, respectively. The adsorption-desorption behaviors of Phe under Phe contamination and Cu (II)-Phe co-contamination in 20 types of soils were studied. The adsorption-desorption behaviors of Phe in 20 types of soils varied greatly, and adsorption of Phe in the soils followed both linear partitioning and nonlinear surface adsorption. Soil organic matter (SOM) plays an important role in the adsorption-desorption behavior of Phe. When the concentrations of Phe were >50 μg/L, soft carbon (SC) fraction of SOM not black carbon (BC) contributed more to the adsorption of Phe. Soil dissolved organic matter (DOM), especially fulvic acid and humic acid fractions, contributes to the adsorption of Phe. Under the effect of Cu (II) (60 mg/L in solution), the adsorption capacity of soil for Phe increased, which possibly resulted from lowered pH, the existence of the cation-π bonding and the "bonding bridge" effect. The systematic investigation of adsorption-desorption behaviors of Phe in soils under heavy metal-PAHs co-contamination will provide a scientific basis for the calculation of soil environmental capacity in the future. © 2023 Elsevier Ltd

关键词： Soils

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Dissolved black carbon mediated photo-oxidation of arsenic(III) to arsenic(V) in water: The key role of triplet {1.s

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Chemosphere 2024年 347卷 140718页

作者： Zhou, Zhicheng Yang, Lanqing Qu, Xiaolei Fu, Heyun State Key Laboratory of Pollution Control and Resource Reuse/School of the Environment Nanjing University Jiangsu 210046 China

Arsenic is a common contaminant found in natural waters, and has raised significant environmental concerns due to its toxicity and carcinogenicity. In this study, we investigated the mediated photo-oxidation of arsenite (As(III)) under simulated sunlight by dissolved black carbon (DBC), an important dissolved organic matter (DOM) constituent released from black carbon. Five DBC were collected from the water extracts of black carbons that were derived by pyrolyzing different biomass (i.e., bamboo, rice, peanuts, corn, and sorghum stalks), and four well-studied dissolved humic substances (DHS) were selected for benchmarking. The presence of DBC (i.e., 5 mg C−1. significantly accelerated the photo-oxidation of As(III) to arsenate (As(V)), with the observed pseudo-first-order rate constant of reaction increased by 5∼1. times. Quenching experiments of photochemically produced reactive intermediates suggested that As(III) was mainly oxidized by triplet-excited DBC (3DBC*, contribution of 48%), singlet oxygen (1.2, 1.%) and superoxide anions (O2•-, 28%) in sunlight-irradiated DBC solutions. The average apparent quantum yield of As(III) photo-oxidation for DBC was found to be more than 4 times higher in comparison with DHS. Such a strong mediation efficiency of DBC was due to its smaller molecular size and higher aromaticity than DHS, which facilitated the non-charge-transfer process to produce triplet-excited states and their sensitized 1.2. Consistently, DBC exhibited a higher apparent quantum yield and a longer lifetime of triplet states as compared with DHS. The results imply that DBC may play a previously unrecognized important role in the fate of arsenic in aquatic environments. © 2023 Elsevier Ltd

关键词： Excited states

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Energy neutrality potential of wastewater treatment plants:A novel evaluation framework integrating energy efficiency and recovery

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Frontiers of Environmental Science & Engineering 2022年第9期16卷 65-75页

作者： Runyao Huang Jin Xu Li Xie Hongtao Wang Xiaohang Ni Key Laboratory of Yangtze River Water Environment Ministry of EducationState Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China UNEP-Tongji Institute of Environment for Sustainable Development Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai 200092China

Wastewater treatment plants(WWTPs)consume large amounts of energy and emit greenhouse gases to remove *** study proposes a framework for evaluating the energy neutrality potential(ENP)of WWTPs from an integrated *** data of 970 WWTPs in the Yangtze River Economic Belt(YREB)were extracted from the China Urban Drainage Yearbook *** potential chemical and thermal energies were estimated using combined heat and power(CHP)and water source heat pump,*** key performance indicators(KPIs)were then established:the energy self-sufficiency(ESS)indicator,which reflects the offset degree of energy recovery,and the comprehensive water–energy efficiency(CWEE)indicator,which characterizes the efficiency of water–energy *** the qualitative results,98 WWTPs became the benchmark(i.e.,CWEE=1.000),while 1.2 WWTPs were fully self-sufficient(i.e.,ESS≥1.0%).Subsequently,four types of ENP were classified by setting the median values of the two KPIs as the critical *** WWTPs with high ENP had high net thermal energy values and relatively loose discharge *** explanatory factor analysis of water quantity and quality verified the existence of scale *** carbon source and biodegradability condition were also significant *** the CWEE indicator was mostly sensitive to the input of CHP,future optimization shall focus on the moisture and organic content of *** study proposes a novel framework for evaluating the ENP of *** results can provide guidance for optimizing the energy efficiency and recovery of WWTPs.

关键词： Wastewater treatment plants Energy neutrality potential Energy efficiency Energy recovery Evaluation framework

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Optimized preparation of Ni-Febm bimetallic particles by ball milling NiSO4 and iron powder for efficient removal of triclosan

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Chemosphere 2024年 360卷 142359页

作者： Zhou, Bingnan Fan, Bo Gong, Zhimin Shao, Shuai Zhou, Dongmei Gao, Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The excessive usage and emissions of triclosan (TCS) pose a serious threat to aquatic environments. Iron-based bimetallic particles (Pd/Fe, Ni/Fe, and Cu/Fe, etc.) were widely used for the degradation of chlorophenol pollutants. This study proposed a novel synthesis method for the preparation of Ni/Fe bimetallic particles (Ni-Febm) by ball milling microscale zero valent iron ZVI (mZVI) and NiSO4. Ball-milling conditions such as ball-milling time, ball-milling speed and ball-to-powder ratio were optimized to prepare high activity Ni-Febm bimetallic particles. During the ball-milling process, Ni2+ was reduced to Ni0 and formed a coupled structure with ZVI. The amount of Ni0 on ZVI significantly affected the activity of Ni-Febm bimetallic particles. The highest activity Ni-Febm bimetallic particles with Ni/Fe ratio of 0.03 were synthesized under optimized conditions, which could remove 86.56% of TCS (1. μM) in aerobic aqueous solution within 60 min. In addition, higher particle dosage, lower pH condition and higher reaction temperature were more conducive for TCS degradation. The higher corrosion current and lower electron transfer impedance of Ni-Febm bimetallic particles were the main reasons for its high activity. The hydrogen atom (•H) on the surface of Ni-Febm bimetallic particles was mainly contributed to the removal of TCS, as reductive transformation products of TCS were detected by LC-TOF-MS. Notably, a small amount of oxidation products were discovered. The total dechlorination rate of TCS was calculated to be 39.67%. After eight reaction cycles, the residual Ni-Febm bimetallic particles could still degrade 28.34% of TCS within 6 h. Low Ni2+ leaching during reaction indicated that Ni-Febm bimetallic particles did not pose potential environmental risks. The prepared environmental-friendly Ni-Febm bimetallic particles with high activity have great potential in the degradation of other chlorinated organic compounds in wastewater. © 2024 Elsevier Ltd

关键词： Sulfur compounds

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Enhanced performance of photocatalytic oxidation of indoor toluene over Pd/TiO2 catalyst by tuning surface defect concentrations

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Chemosphere 2024年 366卷 143409页

作者： Wang, Gehui Wu, Cong Liu, Qinglong Wan, Haiqin Dong, Lin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

An effective approach for the elimination of indoor gaseous toluene through photocatalytic oxidation involves the engineering of surface defects on catalysts. In this study, the concentrations of surface oxygen defects in PdTi-xN (x = 1., 30) catalysts were controlled using the sodium borohydride solid-phase reduction method, and their performances in the photocatalytic oxidation of indoor gaseous toluene were evaluated. PdTi–1. N demonstrated high photocatalytic efficiency for toluene oxidation, achieving 84% toluene conversion and approximately 75% CO2 mineralization. Characterization results indicated that surface oxygen defects can enhance the separation of photo-generated electrons and holes, facilitating their interaction with Pd0 species to form Ti3+ species. More reactive oxygen species (·OH-and ·O2−) were generated on PdTi–1. N due to the synergistic effect of surface oxygen defect and Ti3+ species, which played a significant role as the toluene oxidation. This work provides a new insight for the design and development of high-performance Pd/TiO2 catalysts in the field of indoor VOCs treatment. © 2024 Elsevier Ltd

关键词： Toluene

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