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
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, People’s Republic of China<&wdkj&>Jiangxi Provincial Key Laboratory of Silviculture, College of Forestry, Jiangxi Agricultural University, Nanchang, China
摘要：
PurposeThe massive applications of fertilizers and unreasonable management have resulted in serious soil degradation. Spent mushroom substrate (SMS) could be used as the raw material to produce biochar, and the SMS and SMS-derived biochar applications might affect the phytoremediation performances of contaminated soils. This study aimed to reveal the differences in functional mechanisms of SMS and SMS-derived biochar affecting the phytoremediation of soil heavy metal contamination.Materials and methodsAlfalfa (Medicago sativa L.) was used to remediate the agricultural soil contaminated with cadmium (Cd), arsenic (As), and copper (Cu), and the effects of SMS and SMS-derived biochar applications on alfalfa phytoremediation, contaminant phytoextractions, microbial activities, and antibiotic and heavy metal resistance genes and were quantified.Results and discussionRelative to the alfalfa alone, extra biochar application reduced soil available Cd contents by 44% and enhance the phytoremediation performances via enhancements in plant biomass. The combined applications of SMS and biochar significantly enhanced soil urease, beta-glucosidase, and phosphatase activities increased As resistance gene abundance by 264% but had negligible impact on antibiotic resistance gene abundance, relative to the alfalfa alone. The alfalfa phytoremediation with the SMS applications significantly enhanced the relative abundances of Proteobacteria and Bacteroidetes and significantly changed the community structures of microorganisms containing heavy metal resistance genes.ConclusionsOur study suggested that the SMS-derived biochar reduced the soil's available Cd content and enhanced the phytoremediation performance, and the SMS application could enhance microbial resistances to heavy metals and stimulate microbial activities in contaminated soil.
通讯机构：
[Yaocheng Deng; Ying Huang] C;[Chengyang Feng] K;KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia<&wdkj&>College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
期刊：
Science of The Total Environment,2023年905:167289 ISSN：0048-9697
通讯作者：
Zhang, X
作者机构：
[Zhang, Xin; Yang, Guang; Li, Jinglong; Chen, Baodong; Xing, Shuping; Fu, Gengxue] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China.;[Zhang, Xin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Wu, Songlin] Univ Queensland, Sustainable Minerals Inst, Ctr Mined Land Rehabil, Brisbane, Qld 4072, Australia.;[Feng, Haiyan] China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China.;[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Zhang, X ] C;Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China.
关键词：
AM fungi;Biochar;Cr tolerance;Plant metabolism;Soil properties
摘要：
Soil chromium (Cr) contamination has become an environmental problem of global concern. However, the joint effects of combined utilization of biochar and arbuscular mycorrhizal (AM) fungal inoculum, which are considered as two promising remediation strategies of soil heavy metal pollutions, on plant Cr resistance are still poorly understood. In this study, a two-factor pot experiment was conducted to investigate how biochar and AM fungus Rhizophagus irregularis regulate Medicago sativa growth, physiological trait, nutrient and Cr uptake, relevant gene expressions, soil properties, and Cr speciation, independently or synergistically. The results showed that biochar notably decreased AM colonization, while biochar and AM fungus could simultaneously increase plant dry biomass. The greatest growth promotion was observed in mycorrhizal shoots at the highest biochar level (50gkg(-1) soil) by 91 times. Both biochar application and AM fungal inoculation enhanced plant photosynthesis and P nutrition, but the promoting effects of AM fungus on them were significantly greater than that of biochar. In addition, the combined application of biochar and AM fungus dramatically reduced shoot and root Cr concentrations by up to 92% and 78%, respectively, compared to the non-amended treatment. Meanwhile, down-regulated expressions were observed for metal chelating-related genes. Furthermore, Cr translocation from roots to shoots was reduced by both two soil amendments. Transcriptional levels of genes involved in reactive oxygen species and proline metabolisms were also regulated by biochar application and AM fungal colonization, leading to alleviation of Cr phytotoxicity. Furthermore, AM fungal inoculation slightly elevated soil pH but decreased plant-available soil P, which was, by contrast, lifted by biochar addition. The combined application reduced soil acid-extractable Cr concentration by 40%. This study provides new insights into comprehensively understanding of the mechanisms of biochar and AM fungi combination on improving plant Cr tolerance.
作者机构：
[Long, Jiumei; Liu, Zui; Zhang, Guocheng; Zhou, Dongsheng; Wang, Jing; Luo, Yuanlai; Huang, Binyan] Hengyang Normal Univ, Coll Life Sci, Hunan Key Lab Conservat & Utilizat Biol Resources, Hengyang 421008, Peoples R China.;[Lei, Ming] Hunan Agr Univ, Coll Resource & Environm, Hunan Engn Res Ctr Safe & High Efficient Utilizat, Changsha 410128, Peoples R China.
通讯机构：
[Ming Lei] H;Hunan Engineering Research Center for Safe & High-Efficient Utilization of Heavy Metal Pollution Farmland, College of Resource & Environment, Hunan Agricultural University, Changsha, 410128, PR China
通讯机构：
[Yan-Hong Wang; Ji-Hui Wen] E;Ecology Department, College of Resources and Environment, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha, 410128, China<&wdkj&>School of Forestry and Bio-technology, Zhejiang Agriculture & Forestry University, Hangzhou, 311300, China<&wdkj&>Ecology Department, College of Resources and Environment, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha, 410128, China<&wdkj&>Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
关键词：
Autotoxicity;Bacterium;Detoxification;Invasion;Advantage;Release;Decline;Over time
摘要：
Plant invasive success is attributed to invaders' ecological advantages over their native neighbors. However, increasing evidence suggests that these advantages are expected to attenuate over time because of natural enemy accumulation, ecological evolution of native species and autotoxicity. We determined how an invasive Ageratina adenophora could remain its competitive advantages over time by avoiding its autotoxicity. Our results highlighted that the autotoxicity of A. adenophora in its invaded soil was reduced by some microbes. Moreover, an autotoxic alle-lochemical, 2-coumaric acid glucoside, detected in the invaded soil, demonstrated distinctly autotoxic effects on its seed germination and seedling growth. However, the autotoxic effects were greatly alleviated by a bacterium Bacillus cereus, accumulated by A. adenophora. Further-more, the allelochemical could be almost completely degraded by B. cereus within 96 h. Accordingly, we speculate that A. adenophora could aggregate B. cereus to release its autotoxicity maintaining its competitive advantages over time.
通讯机构：
[Qin, P.] C;College of Resources and Environment, China
关键词：
acid-modified;capacitive deionization;iron-loaded;phosphorus and fluoride wastewater;simultaneous treatment
摘要：
Here, capacitive deionization technology (CDI) using modified activated carbon fiber felt (ACF) electrodes was proposed to provide a new strategy for the challenge of simultaneous phosphorus and fluoride wastewater treatment. The acid-modified iron-loaded ACF (A@Fe-ACF) was obtained by modifying ACF through a two-step impregnation method. After the modification, the oxygen-containing functional groups on ACF increased and provided more adsorption sites. The electron transfer efficiency on the A@Fe-ACF was increased by introducing Fe and synergistically promoted the adsorption of phosphorus and fluorine. Results showed that the removal efficiencies of total phosphorus (TP) and total fluorine (TF) in wastewater reached 89.4% and 85% under optimal conditions (voltage intensity 1.5 V, pH 7, plate spacing 1 cm), while the adsorption mechanism of phosphorus and fluorine was dominated by chemical adsorption. Meanwhile, A@Fe-ACF electrode has good recyclability and stability after five cycles.
通讯机构：
[Xiaomin Gong] C;College of Resources and Environment, Hunan Agricultural University, Changsha, China<&wdkj&>Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, China
摘要：
Main conclusion This review proposed that phytoremediation could be applied for the decontamination of MPs/NPs.Micro- and nano-plastics (MPs < 5 mm; NPs < 100 nm) are emerging contaminants. Much of the recent concerns have focused on the investigation of their pollution and their potential eco-toxicity. Yet little review was available on the decontamination of MPs/NPs. Recently, the uptake of MPs/NPs by plants has been confirmed. Here, in view of the current knowledge, this review introduces MPs/NPs pollution and highlights the updated information about the interaction between MPs/NPs and plants. This review proposed that phytoremediation could be a potential possible way for the in situ remediation of MPs/NPs-contaminated environment. The possible mechanisms, influencing factors, and existing problems are summarized, and further research needs are proposed. This review herein provides new insights into the development of plant-based process for emerging pollutants decontamination, as well as the alleviation of MPs/NPs-induced toxicity to the ecosystem.
摘要：
In the current work, the effects of biochar, vermicompost, as well as their combined application on ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in soils contaminated with potentially toxic elements (PTEs) were investigated. In this regard, four treatments were performed; among them, treatment A served as a control without additive, treatment B with vermicompost (2%), treatment C with biochar (2%), and treatment D with biochar (2%) plus vermicompost (2%). In addition, the abundance and structure of the AOA and AOB amoA gene were measured using quantitative PCR and high-throughput sequencing. The relationships between the microbial community, physicochemical parameters, and CaCl2-extractable PTEs were analyzed using the Pearson correlation method. We found that adding biochar and vermicompost promoted the immobilization of PTEs and nitrogen biotransformation. The rational use of biochar and vermicompost is beneficial for the growth of bacterial and fungal communities in soils polluted by PTEs. AOA and AOB amoA genes were stimulated by biochar, vermicompost, and their combination, but their structure was hardly affected.
通讯机构：
[Pufeng Qin; Zhibin Wu] C;[Hui Wang] D;Department of Chemical Engineering, University College London, London WC1E 7JE, UK<&wdkj&>College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China<&wdkj&>Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha 410128, PR China
摘要：
As a metal-free polymer, graphitic carbon nitride (g-C3N4) has spurred extensive consideration over their inor-ganic counterparts due to the unique physical and chemical properties. However, the low specific surface area, high charge recombination rate and insufficient light absorption limit its application in the field of photo -catalysis. Sulfur doping has been demonstrated as an efficient strategy for to promote light absorption and radiative carrier separation. On the basis of sulfur-doped carbon nitride, many of its modified composites have been synthesized and applied in photocatalysis, and have achieved dazzling results. Here, we introduce the basic properties of sulfur doped carbon nitride and its preparation method, and then discuss the effective method of controlling the introduction of sulfur doped g-C3N4. In addition, the achievement of sulfur doped g-C3N4 for several applications, including water splitting, carbon dioxide reduction, organic compounds degradation, inorganic matter transformation, nitrogen fixation and bacteria disinfection, were comprehensively reviewed. Finally, outstanding challenges and prospective perspectives are discussed, which might provide a new idea for the photocatalysts design for photocatalytic activity improvement.
关键词：
Electron transfer;Hydroxyl radicals;Reaction sites;Reduced nontronite;Sulfamethoxazole degradation
摘要：
It has been documented that organic contaminants can be degraded by hydroxyl radicals (center dot OH) produced by the activation of H2O2 by Fe(II)-bearing clay. However, the interfacial electron transfer reactions between structural Fe(II) and H2O2 for center dot OH generation and its effects on contaminant remediation are unclear. In this study, we first investigated the relation between center dot OH generation sites and sulfamethoxazole (SMX) degradation by activating H2O2 using nontronite with different reduction extents. SMX (5.2-16.9 }mu mol/L) degradation first increased and then decreased with an increase in the reduction extent of nontronite from 22 to 62%, while the center dot OH production increased continually. Passivization treatment of edge sites and structural variation results revealed that interfacial electron transfer reactions between Fe(II) and H(2)O(2 )occur at both the edge and basal plane. The enhancement on basal plane interfacial electron transfer reactions in a high reduction extent rNAu-2 leads to the enhancement on utilization efficiencies of structural Fe(II) and H2O2 for center dot OH generation. However, the center dot OH produced at the basal planes is less efficient in oxidizing SMX than that of at edge sites. Oxidation of SMX could be sustainable in the H2O2/rNAu-2 system through chemically reduction. The results of this study show the importance role of center dot OH generation sites on antibiotic degradation and provide guidance and potential strategies for antibiotic degradation by Fe(II)-bearing clay minerals in H2O2-based treatments. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
摘要：
To improve the hydrophilicity and long-lasting bacterial inhibition of poly(vinylidene fluoride) (PVDF) ultrafiltration membranes, DA/Ag-GO/PSF/PVDF hybrid ultrafiltration membranes were prepared with PVDF and polysulfone (PSF) as substrates, graphene oxide (GO) as additives, and dopamine (DA) and silver as surface modifications. The structure and performance of PSF/PVDF hybrid membranes were investigated by SEM, FTIR, contact angle, filtration flux, and bacterial inhibition tests. The results showed that with the addition of GO, the hydrophilicity of the PSF/PVDF hybrid membranes were enhanced, the water flux tended to be increased, the retention rate of bovine serum albumin were maintained above 94%, and the bacterial inhibition against Gram-negative and positive bacteria were obvious. When GO was added at 0.2 wt%, the contact angle of the hybrid membrane decreased from 87 degrees to 69 degrees, the water flux increased from 406.05 to 650.52 L m(-2) h(-1), the flux recovery increased from 49.18% to 84.40%, and the resistance to organic contamination was significantly improved.
通讯机构：
[Lin Tang] C;College of Environmental Science and Engineering, Hunan University, Changsha 410082, China<&wdkj&>Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China
摘要：
The abuse of pesticides and antibiotics and their harm to the environment are the disadvantages of modern agriculture and breeding industry. g-C3N4 has shown great potential in photocatalytic water pollution purifi-cation under visible light irradiation, however, the conventional g-C3N4 suffers from the disadvantage of limited optical absorption and serious charge recombination, resulting in inefficient light energy conversion and pollutant degradation. This study provides a strategy of combining defect engineering with a built-in electric field to prepare homojunction a photocatalyst with high optical absorption rate and charge separation efficiency. Experiments and DFT simulation revealed the mechanism of significant improvement in the photocatalytic performance of the prepared catalyst, and proposed the pollutant degradation pathway. In addition, the pho-tocatalytic effects of the prepared catalysts on different natural water bodies, natural light, and various water conditions were investigated, revealing the applicability of the catalysts in the purification of pollutants in various water environments. <comment>Superscript/Subscript Available</comment
通讯机构：
[Jiachao Zhang; Zhiyong Yan] H;Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, Hunan Agricultural University, Changsha 410028, China
摘要：
This study screened a Trichoderma strain (Trichoderma pubescens DAOM 166162) from activated sludge to solve the limitation of traditional biological processes in the treatment of amoxicillin (AMO) containing wastewater. The mechanism of the removal of AMO wastewater by T. pubescens DAOM 166162 (TPC) was studied. AMO resulted in a higher protein percentage in the extracellular polymeric substances (EPS) secreted by TPC, which facilitated the removal of AMO from the wastewater. Fourier transform infrared spectroscopy and excitation-emission matrix were used to characterize EPS produced by metabolizing different carbon sources. It was found that the hydroxyl group was the primary functional group in EPS. The life activity of TPC was the cause of the pH rise. The main pathway of degradation of AMO by TPC was the hydroxyl group uncoupling the lactam ring and the hydrolysis of AMO in an alkaline environment. The removal efficiency of AMO in wastewater by TPC was >98 % (24 h), of which the biodegradation efficiency was 70.01 ± 1.48 %, and the biosorption efficiency was 28.44 ± 2.97 %. In general, TPC is an effective strain for treating wastewater containing AMO. This research provides a new idea for AMO wastewater treatment.
通讯机构：
[Yaocheng Deng] C;College of Resources & Environment, Hunan Agricultural University, Changsha, China
摘要：
1. The main criticism of Filella (2022) against us is that we confuse the types of organic germanium and the lack of a clear definition and discussion of organic germanium. Earlier in the discussio...
