摘要：
Acid mine drainage is harmful to the environment. Bioremediation based on biological soil crusts (BSCs) can be used as a new method to alleviate metal pollution in acid mine drainage. In this study, we found that BSCs can survive in a strongly acidic environment (pH = 3.28) and have a high metal(loid)s accumulation ability. The algae of genera Fragilaria, Klebsormidium, Cymbella, Melosira, Microcystacea, and Planctonema a're the main components of BSCs. These organisms in the BSCs regulated fatty acids and produced acid-resistant enzymes. The bioconcentration factors for As, Cd, Pb, Zn, and Cu were as high as 16,000, 200, 50, 26, and 400, respectively. The concentration of As and Cd in acid mine drainage decreased from 7.1μg and 350μg/L to 1.9μg and 110μg/L, respectively. Intotal, 56% of As, 73% of Cd, 88% of Pb, 85% of Zn, and 92% of Cu were present in BSCs as residual or mineral-bound forms. The XRD results (e.g., quarartz and phyllosilicates), SEM results (e.g., phylosilicates and diatom shells) and correlation results show that these metal(loid)s are immobilized by Cymbella (diatoms) during the deposition of silica in the acidic environment. Furthermore, adsorption and co-precipitation are other ways that metal(loid)s could have been bound. These findings provide new insights into the removal of metals (loid) in acidic water.
通讯机构：
[Manyun Zhang] K;Key Laboratory for Rural Ecosystem Health in Dongting Lake Area, College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, PR China<&wdkj&>Centre for Planetary Health and Food Security, School of Environment and Science, Griffith University, Brisbane, Queensland 4111, Australia
关键词：
Carbendazim;Dicyandiamide;Health risk;Microbial community structure;Resistance genes
通讯机构：
[Hongli Huang] H;Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
通讯机构：
[Fayun Li] S;School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai, China<&wdkj&>School of Resources and Environmental Science, Hunan Agricultural University, Changsha, China
摘要：
Worldwide pollution of waters and soils is a rising health issue calling for advanced decontamination methods such as adsorption of contaminants on biochar because biochar is carbon-negative material displaying many adsorptive properties. Biochar has been improved by chemical, physical and magnetic modifications, and by surface decoration, yet the recent development of biochar-supported composites appears more promising. Here we review biochar-supported composites with focus on preparation, mechanisms, biochar-clays, biochar-microorganisms, biochar-enzymes, and applications to adsorb metals, nutrients and organic contaminants.
通讯机构：
[Wen-ping Zhang] C;College of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha, China<&wdkj&>Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources & Environment, Hunan Agricultural University, Changsha, China
关键词：
micro-nano bubble aerated irrigation;nitrogen accumulation and utilization;rice yield;super rice;Super riz;Irrigation aérée à bulles micro-nano;Rendement du riz;Accumulation et utilisation d'azote
摘要：
Abstract Micro‐nano bubble aerated irrigation (MNBI) is an innovative technology that generates nano‐diameter bubbles in irrigation water via a micro‐nano bubble device. In this study, pot experiments with three different nitrogen level treatments under conventional irrigation and MNBI were conducted to investigate the effects of MNBI and nitrogen application levels on rice yield, nitrogen accumulation and utilization. The results showed that MNBI promoted rice yields by increasing the seed setting rate compared to conventional irrigation, and nitrogen accumulation was positively correlated with nitrogen application but significantly increased by MNBI due to the increased root growth and activity. Furthermore, the activity of key enzymes involved in nitrogen metabolism, nitrate reductase and glutamine synthetase, significantly increased under MNBI at a nitrogen level of 225 kg ha−1. In conclusion, with the elevation of nitrogen application, MNBI improved rice yields and nitrogen accumulation and utilization, indicating that nitrogen and MNBI synergistically enhanced rice yields. Thus, the results provide the basis for efficient and high‐yielding super rice cultivation. Abstract L'irrigation aérée à bulles micro‐nano (MNBI) est une technologie innovante qui génère des bulles de diamètre nano dans l'eau d'irrigation via un dispositif de bulles micro‐nano. Dans cette étude, des expériences en pot avec trois traitements différents de niveau d'azote dans le cadre d'irrigation conventionnelle et MNBI ont été menées pour étudier les effets de MNBI et les niveaux d'application d'azote sur le rendement du riz, l'accumulation et l'utilisation de l'azote. Les résultats ont montré que MNBI a promu les rendements de riz en augmentant le taux de la germination des graines par rapport à l'irrigation conventionnelle. L'accumulation d'azote a été positivement corrélée avec l'application d'azote, mais significativement augmentée par MNBI en raison de la croissance et de l'activité accrue des racines. En outre, l'acticité des enzymes clés impliquant le métabolisme de l'azote, la nitrate réductase et la synthèse de la glutamine, a augmenté de manière significative sous MNBI au niveau de 225 kg ha−1 d'azote. En conclusion, avec l'augmentation de l'application d'azote, le MNBI a amélioré les rendements de riz et l'accumulation et l'utilisation de l'azote, ce qui indique que l'azote et le MNBI améliorent les rendements de riz de manière synergique. Ainsi, les résultats fournissent la base pour une culture efficace et à haut rendement du super riz.
作者机构：
[Yan, Binghua; Zhou, Jun; Liang, Jialin; Zhao, Jun; Xu, Suyun; Tyagi, R. D.; Wong, Jonathan W. C.; Luo, Liwen] Hong Kong Baptist Univ, Inst Bioresource & Agr, Dept Biol, Hong Kong, Peoples R China.;[Yan, Binghua] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Xu, Suyun] Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China.;[Zhou, Jun] Nanjing Tech Univ, Fac Biotechnol & Pharmaceut Engn, Nanjing 211816, Peoples R China.;[Tyagi, R. D.; Wong, Jonathan W. C.] Huzhou Univ, Sch Technol, Huzhou 313000, Peoples R China.
通讯机构：
[Jonathan W.C. Wong] I;Institute of Bioresource and Agriculture, Department of Biology, Hong Kong Baptist University, Hong Kong SAR, China<&wdkj&>School of Technology, Huzhou University, Huzhou 313000, China
关键词：
Straw return;Exogenous C;Soil labile C fractions;Soil microbial community
摘要：
Incorporating amendments can change soil organic carbon (SOC) components and biological properties, but the comprehensive utilization of straw and straw biochar in paddy soil remains poorly understood. We studied the changes in the pH, SOC content, labile organic C fractions, and soil microbial communities under alternating wetting and drying (AWD) and continuous flooding (CF). The results showed that the addition of straw and straw biochar increased SOC content, and the relative changes in microbial biomass carbon (MBC), dissolved organic carbon (DOC), and easily oxidizable carbon (EOC) were more sensitive than those in SOC, but soil pH was higher under AWD management than under CF management. Proteobacteria, Bacteroidetes, and Acidobacteria were the three most abundant bacterial phyla, and the three major abundant fungal phyla were Phragmoplastophyta, norank_Eukaryta, and Apicomplexa. A redundancy discriminant analysis (RDA) found that both straw and straw biochar were conducive to bacterial growth, and their combination was more beneficial for fungal growth and development. Aggregated boosted tree (ABT) and Structural equation modeling (SEM) showed that the soil MBC and EOC were the most important factors determining bacterial abundance and diversity, while pH, EOC, and MBC were the main factors influencing the abundance and diversity of fungi. This study explored the changes in SOC fractions and bacterial and fungal communities and provided a theoretical basis for an in-depth understanding of the influence of labile organic C pools on bacterial and fungal communities.
期刊：
Chemical Engineering Journal,2023年451:138437 ISSN：1385-8947
通讯作者：
Yin, Peng(yinpeng@hunnu.edu.cn)
作者机构：
[Yin, Peng; Yin, Guoxing; Gan, Yabing; Li, Haitao; Xu, Zhaomin; Yu, Ting] Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ, Changsha 410081, Peoples R China.;[Zhou, Huyang] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Peng Yin] K;Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
关键词：
Gold;Multi-signal;Palladium species;Simultaneous visualization and quantification;Visual sensor
摘要：
The rapid decontamination of farmland irrigation water polluted with heavy metals has attracted a great deal of attention. This paper addressed the removal of trace suspended cadmium (Cd) from irrigation water by using the water hyacinth (Eichhornia crassipes) and the phosphate fertilizer (WH-PF). Compared with control samples, Cd removal rate was 12 times higher in the presence of Eichhornia crassipes; furthermore, removal rate rose 36 times after application of WH-PF. A 40 mu g/L Cd in irrigation water was reduced to less than 3.5 mu g/L within two treatment hours, with the removal efficiency of 91%. Both the root exudates of Eichhornia crassipes and phosphate fertilizers decreased the zeta potential of suspended substance (SS) and increased its size, resulting in accelerating sedimentation. The gas chromatography-mass spectrometer (GC-MS) revealed the presence of large volumes of amino-containing organic matter in the root exudates, such as 2,7-diamino-5-((3-(1-amino-1-carboxypropan-2-yl)-1,4-dihydroquinolin-7-yl)methyl)-6-methyl-7-oxoheptanoi acid, 1H-Indole-3-carboxaldehyde, which played important role in neutralizing charges of the SS. Additionally, phosphate fertilizers can decrease the zeta potential of SS by increasing the Fe3+/Fe2+ value. And then the phosphate-iron-hydroxyl-formed multinuclear polymer with network structure can rapidly flocculate the suspended Cd. Our study demonstrated that a WH-PF technology can quickly and effectively remove suspended Cd from farmland irrigation water.
作者机构：
[Huang, Zhenrong; Ge, Yili; Wu, Mian; Ge, Dabing; Hao, Huijuan; Pu, Tong; He, Ziyun] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Rene, Eldon R.] IHE Delft Inst Water Educ, Dept Water Supply Sanitat & Environm Engn, Westvest 7, NL-2601 DA Delft, Netherlands.
通讯机构：
[Zhenrong Huang; Eldon R. Rene] A;Authors to whom correspondence should be addressed.<&wdkj&>Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, 2601 DA Delft, The Netherlands<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
摘要：
The main aim of this research was to determine the physiological response of the submerged macrophyte Vallisneria natans (V. natans) to black water with a foul odor. V. natans was chosen as the experimental plant species to investigate the morphological response and ecophysiological adaptation methods in response to varying light depths and black-odorous water. V. natans was planted in tap water (D), two types of black-odorous water (E and F), and under three distinct light conditions (low light, medium light, and high light). In the high-light condition with black-odorous water (E), the biomass content of V. natans declined from 1.78 g on the 14th day to 1.49 g on the 28th day, demonstrating that the black-odorous water inhibited the growth of V. natans. Under the stress of black-odorous water, the chlorophyll content of V. natans increased greatly in the early period but reduced during the latter experimental period. However, on the 21st day, maximum chlorophyll content of 1.30 mg/g (E) and 1.18 mg/g (F) was observed. In addition, the malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activity was monitored and reported under black-odorous water stress in V. natans. The experimental results of this work demonstrated conclusively that odorous black water exerts a certain stress on the physiological development of V. natans. Future research should incorporate the evaluation of several plant species and vary the process and environmental conditions to produce field-relevant, dependable results.
摘要：
Hydrochar from agricultural wastes is regarded as a prospective and low-cost material to activate peroxymonosulfate (PMS) for degrading pollutants. Herein, a novel in-situ N-doped hydrochar composite (RHCM4) was synthesized using montmorillonite and waste reed straw rich in nitrogen as pyrolysis catalyst and carbon source, respectively. The fabricated RHCM4 possessed excellent PMS activation performance for decomposing quinclorac (QC), a refractory herbicide, with a high removal efficiency of 100.0% and mineralization efficiency of 75.1%. The quenching experiments and electron spin resonance (ESR) detection disclosed free radicals (center dot OH, center dot SO4-, and center dot O-2(-)) and non-radicals (O-1(2)) took part in the QC degradation process. Additionally, the catalytic mechanisms were analyzed in depth with the aid of various characterizations. Moreover, the QC degradation intermediates and pathways were clarified by density functional theory calculations and HPLC-MS. Importantly, phytotoxicity experiments showed that RHCM4/PMS could efficaciously mitigate the injury of QC to Solanaceae crops (pepper, tomato, and tobacco). These findings give a new idea for enhancing the catalytic activity of hydrochar from agricultural wastes and broaden its application in the field of agricultural environment.
摘要：
Herein, PDI-g-C3N4/g-C3N4 homojunction has been fabricated via the multiscale modification strategy to enhance photocatalytic atrazine degradation. The morphological scale modification was realized by multistep thermal condensation, where the released gas could act as templates to form the porous structure. The molecular scale modification was achieved by the pyromellitic diimide (PDI) decoration, which could distort the planar nanosheet to induce a porous structure and provide more chromophores for better light absorption. The electronic scale modification was realized by the built-in electric field between the PDI-gC(3)N(4)/g-C3N4 homojunction interfaces, which suppressed the recombination of photocarriers. The PDI-gC(3)N(4)/g-C3N4 strengthened photocatalytic atrazine degradation was well-adapted to different environmental influence interference. The optimum atrazine degradation rate within one hour reached 90% in a strong acidic condition (pH = 3.09). It was found that the highly pH-dependent ATZ removal is related to the H2O2 generation during photocatalysis. Within one hour, the PDI-g-C3N4/g-C3N4 could generate 147.38 mu M H2O2. In addition, O-1(2), (A) over cap (.) O-2(-), h(+), and (A) over cap OH were found to have contributed to the ATZ decomposition. During photocatalysis, 14 intermediates and three pathways for atrazine degradation have been found. Hopefully, this study could pave a way for the development of the multiscale modification for the photocatalyst. (c) 2022 Elsevier Inc. All rights reserved.
摘要：
Triclosan (TCS) and triclocarban (TCC) have become ubiquitous pollutants detected in human body with concentrations up to hundreds of nanomolar levels. Previous studies about the hepatic lipid accumulation induced by TCS and TCC were focused on pollutant itself, which showed weak or no effects. High-fat diet (HFD), as a known environmental factor con-tributing to lipid metabolism-related disorders, its synergistic action with environmental pollutants deserves concern. The present study aimed to demonstrate the combined effects and potential molecular mechanisms of TCS and TCC with HFD at cellular and animal levels. The in vitro studies showed that TCC and TCS alone had negligible impact on lipid accumu-lation in HepG2 cells but induced lipid deposition at nanomolar levels when co-exposure with fatty acid. TCC exhibited much higher induction effects than TCS, which was related to their differential regulatory roles in adipogenic-related genes expression. The in vivo studies showed that TCC had little influence on hepatic lipid accumulation in mice fed with normal diet (ND) but could exacerbate the lipid accumulation in mice fed with HFD. Meanwhile, TCC-induced dys-lipidemia in mice fed with HFD was more significant than that fed with ND. Therefore, we speculated that TCC might increase the risk of nonalcoholic fatty liver disease (NAFLD) and atherosclerosis in HFD humans. Molecular mechanism studies showed that TCC and TCS could bind to and activate estrogen-related receptor alpha (ERR alpha) and ERR gamma as well as regulate their expression. TCC had higher activity on ERR alpha and ERR gamma than TCS, which explained partly the differential regulatory roles of two receptors in the lipid accumulation induced by TCC and TCS. This work revealed synergistic effects and molecular mechanisms of TCC and TCS with excessive fatty acid on the hepatic lipid metabolism, which provided a novel insight into the toxic mechanism of pollutants from the perspective of dietary habits.
通讯机构：
[Qin, Pufeng] C;College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China.;Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, People's Republic of China.
摘要：
Waste mushroom substrate (WMS) generated in large quantities from mushroom production process has caused severe environmental pollution. As a sustainable resource, the valorization of WMS in the agricultural field has attracted attention due to the abundant active components. A comprehensive review of valorization of WMS in agricultural production is meaningful to promote the further utilization of this resource. This paper provided an overview of the valorization in sustainable agricultural production using WMS, including animal and crop farming improvement, and agricultural environmental restoration. Moreover, the limitations and the possible development directions of WMS in agricultural production were discussed. Different sustainable cycle models for WMS in agricultural production were proposed. The aim of this review is to provide a feasible solution for the favorable treatment of WMS and improvement of agricultural production quality.
期刊：
Critical Reviews in Environmental Science and Technology,2023年54(1):13-38 ISSN：1064-3389
通讯作者：
Yuan, SH
作者机构：
[Qian, Ao; Tong, Man; Zhang, Peng; Yu, Chenglong; Lu, Yuxi; Yuan, Songhu] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan, Peoples R China.;[Liao, Wenjuan] Hunan Agr Univ, Coll Resources & Environm, Changsha, Peoples R China.;[Dong, Hailiang; Zeng, Qiang] China Univ Geosci, Ctr Geomicrobiol & Biogeochem Res, State Key Lab Biogeol & Environm Geol, Beijing, Peoples R China.;[Yuan, Songhu] China Univ Geosci, Sch Environm Studies, Hubei Key Lab Yangtze Catchment Environm Aquat Sci, Wuhan, Peoples R China.;[Yuan, Songhu] China Univ Geosci, State Key Lab Biogeol & Environm Geol, 68 Jincheng St,East Lake High Tech Dev Zone, Wuhan 430078, Peoples R China.
通讯机构：
[Yuan, SH ] C;China Univ Geosci, State Key Lab Biogeol & Environm Geol, 68 Jincheng St,East Lake High Tech Dev Zone, Wuhan 430078, Peoples R China.
摘要：
Fe-bearing clay minerals are widely distributed in soils, sediments, and rocks, representing a significant Fe pool in the Earth’s crust. The electron transfer (ET) from/to structural Fe in clay minerals is a crucial electron and energy flux in the natural environment, which drives numerous biogeochemical processes and contaminant transformation. Depending on the types and properties of both clay minerals and exogenous reactants as well as aqueous chemistry, the ET processes could involve interfacial ET through edge/basal planes and interior ET inside clay minerals. This paper reviews the important ET reactions between Fe-bearing clay minerals and various reactants, including Fe-cycling microbes, redox-active organic compounds, and heavy metals. Moreover, we discuss the physical-chemical mechanisms of interfacial and interior ET processes and develop models to illustrate the thermodynamic and kinetic constraints on the ET rate and extent. On this basis, we emphasize the environmental implications of ET associated with clay minerals, such as their roles in serving as biogeobatteries for biogeochemical processes and contaminant transformation, coevolution with microbes, and regulation of greenhouse gas formation. Finally, research needs are proposed to advance our molecular-scale understanding of ET processes and utilize them for environmental mitigation and human health.
摘要：
Nano-biochar (NBC) is an effective material for environmental relevance due to its larger specific surface area and richer functional groups than bulk biochar. However, the interaction between NBC and Cd2+ when they coexist with environmental media, in addition to the mechanism of this action, is still unknown. In this study, adsorption experiments and characterization of zeolite and NBC were carried out for revealing the interaction of NBC and Cd2+ on zeolite. The results of isothermal adsorption demonstrated that the Sips model best fitted the co-adsorption of NBC and Cd2+ on zeolite. The adsorption capacity of NBC increased by 10.2% & PLUSMN; 0.03% as opposed to that of Cd2+ decreased by 24.8% & PLUSMN; 0.07% in the co-existence of NBC and Cd2+. It was found that the coexistence of NBC had a dual effect on the environmental behavior of zeolite and contaminant, acting as a double-edged sword. The positive effect was that the adsorption of NBC on zeolite tended to make zeolite more accessible to organic functional groups and inorganic salts. The negative effect was that NBC inhibited contaminant adsorbing on zeolite when NBC coexisted with Cd2+. This study revealed that the coexisting NBC can also enhance the migration risk of Cd2+ in the environment by affecting the adsorption behavior of Cd2+ on zeolite.
通讯机构：
[Yangzhu Zhang; Hao Sheng] A;Authors to whom correspondence should be addressed.<&wdkj&>College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
摘要：
Increasing concentrations of atmospheric CO(2) are driving climate change and negatively impacting the carbon-nitrogen (C/N) balance in crops, which in turn alters fertilizer use efficiency. In this study, Brassica napus was cultivated under different CO(2) and NO(3)(-)-N concentrations to study the impact of C/N ratio on plant growth. Elevated CO(2) enhanced biomass and nitrogen assimilation efficiency under low NO(3)(-)-N conditions, indicating an adaptation by Brassica napus. Transcriptome and metabolome analyses revealed that elevated CO(2) promoted amino acid catabolism under low NO(3)(-)-N conditions. This study provides new insights into how Brassica napus adapts to environmental change.
