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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第5期12卷 408-418页

作者： Md.Jahidul Islam SHOHAG moe key Lab of environmental remediation and Ecosystem health College of Environmental and Resource SciencesZhejiang University

Zinc(Zn) is an essential micronutrient for humans,but Zn deficiency has become serious as equally as iron(Fe) and vitamin A deficiencies *** and breeding of high Zn-density crops is a suitable,cost-effective,and sustainable way to improve human ***,the mechanism of high Zn density in rice grain is not fully understood,especially how Zn transports from soil to *** experiments were carried out to compare Zn uptake and distribution in two different Zn-density rice genotypes using stable isotope *** seedling stage,IR68144 showed higher 68Zn uptake and transport rate to the shoot for the short-term,but no signifi-cant difference was observed in both genotypes for the *** in xylem sap of IR68144 was consistently higher,and IR68144 exhibited higher Zn absorption ratio than IR64 at sufficient(2.0 μmol/L) or surplus(8.0 μmol/L) Zn supply ***64 and IR68144 showed similar patterns of 68Zn accumulation in new leaves at seedling stage and in de-veloping grains at ripening stage,whereas 68Zn in new leaves and grains of IR68144 was consistently *** results suggested that a rapid root-to-shoot translocation and enhanced xylem loading capacity may be the crucial processes for high Zn density in rice grains.

关键词： Zinc Stable isotope High Zn-density rice genotype Translocation Remobilization

Tailoring the surface and interface structures of photocatalysts to enhance hydrogen production

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Science China Chemistry 2024年第4期67卷 1161-1174页

作者： Tao Zhang Pengfei Wang Shuai Yue Fei Li Zhiyong Zhao Sihui Zhan moe key laboratory of Pollution Processes and environmental Criteria/Tianjin key laboratory of environmental remediation and Pollution Control College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Photocatalytic water splitting using semiconductor photocatalysts is a promising approach for the production of carbon-neutral,sustainable and clean hydrogen ***,the separation and transport of photoinduced carriers are generally considered to be rate-limiting steps,and their low efficiency remains a major ***,much effort has been devoted to developing new strategies in surface/interface engineering of photocatalysts to improve the dynamics of charge separation/*** feature article briefly summarizes recent advances in photocatalyst surface/interface engineering by our research group,which have been achieved through the design of various novel photocatalysts,including interfacial modulation,heterostructure construction,heteroatom doping,single atom and diatom *** article is divided into three parts:first,we briefly introduce the three key processes involved in solar water splitting and reveal relationships between the properties of nanostructural photocatalysts and the fundamentals of water splitting;second,we detail methods and strategies for surface and interfacial structures to improve the efficiency of the fundamental processes,especially charge separation;finally,we explore prospects for photocatalytic water splitting *** article provides a valuable resource and strategies for researchers currently working in the field of photocatalytic water splitting.

关键词： photocatalytic water splitting surface/interface structures dual-functional photocatalysis

In situ FT-IR investigation on the reaction mechanism of visible light photocatalytic NO oxidation with defective g-C_3N_4

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Science Bulletin 2018年第2期63卷 117-125页

作者： Hong Wang Wenjie He Xing’an Dong Haiqiang Wang Fan Dong Chongqing key laboratory of Catalysis and New environmental Materials College of Environment and Resources Chongqing Technology and Business University Department of environmental Engineering Key Laboratory of Polluted Environment Remediation and Ecological Health of Ministry of Education Zhejiang University

The g-C_3N_4 with different structures was prepared by heat treatment using urea(CN-U) and thiourea(CN-T) as precursors under the same conditions. The microstructure and optical properties of the photocatalyst were analyzed with advanced tools. The results showed that the CN-U has a porous structure, a high specific surface area and a wide band gap in comparison with CN-T. The in situ FT-IR technique was used to monitor the adsorption and reaction process of visible photocatalytic NO oxidation on g-C_3N_4. The corresponding reaction mechanism was proposed based on the results of reaction intermediate observation and electron paramagnetic resonance(EPR) radical scavenging. It was revealed that(1) the presence of defective sites favored the adsorption of gas molecules and electronically compensated it leading to promoted formation of the final products;(2) the high separation efficiency of photogenerated electron-hole pairs enhanced the production of radicals during the photocatalytic reaction;(3) the hydroxyl radicals(-OH) are not selective for the decomposition of pollutants, which are favorable to the complete oxidation of the reaction intermediates. The above three aspects are the main reasons for the CN-U possessing the efficient visible light photocatalytic activity. The present work could provide new insights and methods for understanding the mechanism of photocatalysis.

关键词： g-C3N4 Visible light photocatalysis Defects In situ FT-IR Reaction mechanism

Glutathione S-transferase(GST) gene expression profiles in two marine bivalves exposed to BDE-47 and their potential molecular mechanisms

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Chinese Journal of Oceanology and Limnology 2015年第3期33卷 705-713页

作者：李斐吴惠丰王清李雪花赵建民 key laboratory of Coastal Zone environmental Processes and ecological remediation Yantai Institute of Coastal Zone Research (YIC )Chinese Academy of Sciences Shandong Provincial key laboratory of Coastal Zone environmental Processes key laboratory of Coastal Zone environmental Processes and ecological remediation Yantai Institute of Coastal Zone Research (YIC) Chinese Academy of Sciences key laboratory of Industrial Ecology and environmental Engineering (moe) School of Environmental Science and TechnologyDalian University of Technology

Glutathione S-transferases （GSTs） are phase II enzymes that facilitate the detoxification of xenobioties and play important roles in antioxidant defense. We investigated the expression patterns of seven Venerupis philippinarum GSTs （VpGSTs） and four Mytilus galloprovincialis GSTs （MgGSTs） following exposure to BDE-47. Differential expressions of the seven VpGSTs and four MgGSTs transcripts were observed, with differences between the hepatopancreas and gills. Among these GSTs, the sigma classes （VpGSTS1, VpGSTS2, VpGSTS3, MgGST1, and MgGST3） were highly expressed in response to BDE-47 exposure, demonstrating their potential as molecular biomarkers for environmental biomonitoring studies. We obtained the three-dimensional crystal structures of VpGSTs and MgGSTs by homologous modeling. A model to elucidate the binding interactions between the ligands and receptors was defined by molecular docking, Hydrophobic and n were the most often observed interactions between BDE-47 and the GSTs.

关键词： glutathione S-transferase (GST) Venerupis philippinarum Mytilus galloprovincialis 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) molecular docking biomarker

Integrated energy view of wastewater treatment:A potential of electrochemical biodegradation

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Frontiers of environmental Science & Engineering 2022年第4期16卷 153-156页

作者： Yuqing Yan Xin Wang moe key laboratory of Pollution Processes and environmental Criteria/Tianjin key laboratory of environmental remediation and Pollution Control/College of environmental Science and Engineering Nankai UniversityTianjin 300350China

It has been more than one century since the activated sludge process was *** its proven stability and reliability,the energy(especially the electrical energy)use in wastewater treatment should evolve to meet the increasingly urgent demand of energy *** paper discusses how the energy utilized in conventional biological wastewater treatment can be altered by switching the indirect energy input to a direct electricity injection,which is achieved by the elecfrode integration providing extra thermodynamic driving force to *** using electrodes instead of oxygen as terminal electron acceptors,the electrical energy can be utilized more efficiently,and the key of direct use of electrical energy in biodegradation is the development of highly active electroactive biofilm and the increase of electron transfer between microbes and the ***,the synergy of different microbial electrochemical units has additional benefit in energy and resource recovery,making wastewater treatment more sustainable.

关键词： Biological wastewater treatment Integrated energy view Electroactive bacteria Extracellular electron transfer

Removal of copper ions from electroplating rinse water using electrodeionization

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1283-1287页

作者： Xiao FENG Jun-song GAO Zu-cheng WU Department of environmental Engineering Zhejiang University Hangzhou 310027 China State key laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China moe key laboratory of Polluted Environment remediation and ecological health Zhejiang University Hangzhou 310027 China

An improved configuration of the membrane stack was adopted in the electrodeionization （EDI） cell to prevent precipitation of bivalent metal hydroxide during the running. The operational parameters that influenced the removal of copper ions from the dilute solution were optimized. The result showed that a moderate decrease in the inlet pH value and a moderate increase in the applied voltage could achieve a better removal effect. The steady process of electroplating wastewater treatment could be achieved with a removal efficiency of more than 99.5% and an enrichment factor of 5-14. The concentration of copper in purified water was less than 0.23 mg/L. This demonstrated the applicability of recovering heavy metal ions and purified water from electroplating effluent for industrial reuse.

关键词： Electrodeionization (EDI) Electroplating wastewater Heavy metal Precipitation

Reductive dechlorination of polychlorinated biphenyls is coupled to nitrogen fixation by a legume-rhizobium symbiosis

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Science China Earth Sciences 2018年第3期61卷 285-291页

作者： Chen TU Yongming LUO Ying TENG Peter CHRISTIE key laboratory of Coastal environmental Processes and ecological remediation Yantai Institute of Coastal Zone ResearchChinese Academy of Sciences key laboratory of Soil Environment and Pollution remediation Institute of Soil ScienceChinese Academy of Sciences

Chlorinated persistent organic pollutants, including polychlorinated biphenyls （PCBs）, represent a particularly serious environmental problem and human health risk worldwide. Leguminous plants and their symbiotic bacteria （rhizobia） are important components of the biogeochemical cycling of nitrogen in both agricultural and natural ecosystems. However, there have been relatively few detailed studies of the remediation of PCB-contaminated soils by legume-rhizobia symbionts. Here we report for the first time evidence of the reductive dechlorination of 2,4,4＇-trichlorobiphenyl （PCB 28） by an alfalfa-rhizobium nitrogen fixing symbiont. Alfalfa （Medicago sativa L.） inoculated with wild-type Sinorhizobiurn meliloti had significantly larger biomass and PCB 28 accumulation than alfalfa inoculated with the nitrogenase negative mutant rhizobium SmY. Dechlorination products of PCB 28, 2,4＇-dichlorobiphenyl （PCB 8）, and the emission of chloride ion （C1-） were also found to decrease significantly in the ineffective nodules infected by the mutant strain SmY. We therefore hypothesize that N2-fixation by the legume-rhizobium symbiont is coupled with the reductive dechlorination of PCBs within the nodules. The combination of these two processes is of great importance to the biogeochemical cycling and bioremediation of organochlorine pollutants in terrestrial ecosystems.

关键词： Biogeochemical cycling Legume-rhizobia symbiosis Microbe-assisted phytoremediation Nitrogen fixation,Polychlorinated biphenyls Soil pollution and remediation Reductive dechlorination

Effect of nitrogen limitation on antioxidant qualities is highly associated with genotypes of lettuce(Lactuca sativa L.)

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Pedosphere 2020年第3期30卷 414-425页

作者： Weiwei ZHOU Ting LV Yan HU Wenjing LIU Qingfang BI Chongwei JIN Lingli LU Xianyong LIN moe key laboratory of Environment remediation and ecological health College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China key laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Antioxidants are highly beneficial to human health, and their accumulation in lettuce, one of the most popular leafy vegetables, depends on both genetic and environmental factors. Nitrogen(N) availability plays an essential role in regulating antioxidant accumulation, but the influence of genotype × N interactions on the antioxidant qualities of lettuce is poorly understood. Therefore, the present study investigated the variation of growth and antioxidant qualities of 20 lettuce(Lactuca sativa L.) genotypes(10 green lettuce genotypes and 10 red lettuce genotypes) under limited N(low N, LN) conditions and standard N(high N, HN) conditions. For all 20 genotypes, LN conditions reduced shoot(i.e., leaf) growth, but increased plant concentrations of vitamin C,glutathione, and phenolic compounds, with the exception of carotenoids, compared with HN conditions. Because of reduced biomass under LN conditions, not all lettuce genotypes exhibited increased antioxidant yields or total antioxidant capacity yield. The variation in antioxidant quality was primarily genetically determined. Generally, the green lettuce genotypes exhibited more pronounced increases in antioxidant yields and total antioxidant capacity yield than the red lettuce genotypes under LN conditions. These results suggest that even though LN conditions generally tend to improve the antioxidant qualities of lettuce, the extent of this effect is highly dependent on genotype. Therefore, genotype should be given priority in future studies that aim to improve antioxidant qualities in lettuce through N management.

关键词： antioxidant capacity antioxidant yield growth characteristics leafy vegetable natural variation nitrogen availability nitrogen management phenolic compounds

Silicon acquisition and accumulation in plant and its significance for agriculture

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Journal of Integrative Agriculture 2018年第10期17卷 2138-2150页

作者： YAN Guo-chao Miroslav Nikolic YE Mu-jun XIAO Zhuo-xi LIANG Yong-chao key laboratory of Environment remediation and ecological health Ministry of Education/College of Environmental & Resource Sciences Zhejiang University Institute for Multidisciplinary Research University of Belgrade

Although silicon（Si） is ubiquitous in soil and plant, evidence is still lacking that Si is essential for higher plants. However, it has been well documented that Si is beneficial for healthy growth of many plant species. Si can promote plant mechanical strength, light interception, as well as resistance to various forms of abiotic and biotic stress, thus improving both yield and quality. Indeed, application of Si fertilizer is a rather common agricultural practice in many countries and regions. As the beneficial effects provided by Si are closely correlated with Si accumulation level in plant, elucidating the possible mechanisms of Si uptake and transport in plants is extremely important to utilize the Si-induced beneficial effects in plants. Recently, rapid progress has been made in unveiling molecular mechanisms of Si uptake and transport in plants. Based on the cooperation of Si influx channels and efflux transporters, a model to decipher Si uptake, transport and distribution system in higher plants has been developed, which involves uptake and radial transport in root, xylem and inter-vascular transport and xylem unloading and deposition in leaf. In this paper, we overviewed the updated knowledge concerning Si uptake, transport and accumulation and its significance for the major crops of agricultural importance and highlighted the further research needs as well.

关键词： silicon uptake transport Si-based fertilizer agriculture

Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

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Journal of environmental Sciences 2016年第3期28卷 16-23页

作者： Siwei Peng Weijun Zhang Jie He Xiaofang Yang Dongsheng Wang Guisheng Zeng key laboratory of Jiangxi Province for ecological Diagnosis-remediation and Pollution Control Nanchang Hangkong University State key laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences

Fenton oxidation is generally inhibited in the presence of a high concentration of chloride *** study investigated the feasibility of using benzoquinone（BQ） and hydroxylamine hydrochloride（HA） as Fenton enhancers for the removal of glycerin from saline water under ambient temperature by accelerating the ferric *** was found that organics removal was not obviously affected by chloride ions of low concentration（less than 0.1 mol/L）,while the mineralization rate was strongly inhibited in the presence of a large amount of chloride *** addition,ferric hydrolysis-precipitation was significantly alleviated in the presence of HA and BQ,and HA was more effective in reducing ferric ions into ferrous ions than HA,while the H_2O_2 decomposition rate was higher in the BQ-Fenton *** spin resonance analysis revealed that OH production was reduced in high salinity conditions,while it was enhanced after the addition of HA and BQ（especially HA）.This study provided a possible solution to control and alleviate the inhibitory effect of chloride ions on the Fenton process for organics removal.

关键词： Saline solution Fenton oxidation Hydroxyl radicals Benzoquinone Hydroxylamine hydrochloride