期刊：
Frontiers in Public Health,2023年11:1132998 ISSN：2296-2565
通讯作者：
Li, F.
作者机构：
[Li, Fei] Research Center for Environment and Health, Zhongnan University of Economics and Law, Hubei, Wuhan, China;[Zhang, Chuanrong] Department of Geography and Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT, United States;[Xiao, Zhihua] College of Resources and Environment, Hunan Agricultural University, Changsha, China;[Hu, Hao] College of Food Science and Technology, Huazhong Agricultural University, Hubei, Wuhan, China
通讯机构：
[Li, F.] R;Research Center for Environment and Health, Hubei, China
关键词：
consumer nutrition;dietary strategies;environmental pollution;food chemistry and safety;health risk management
摘要：
Environmental pollution and food safety are closely related critical issues faced by all populations over the world. Safe foods provide the necessary nutrients for human survival and health. Unfortunately, anthropogenic source-driven contaminants could be transported to foods (via crops, vegetables, fruits, and animals) from the contaminated multimedia environments including air, soil, surface water or groundwater, etc. This Research Topic aims to provide a platform for scholars to report their research progress on studying multimedia environmental pollutions and food safety around the world. Multidisciplinary research is urgently needed to explore a range of health and nutrition inquiries, from issues of the food supply chain to cooking practices and dietary safety management, not only in normal times but also as a function of the COVID-19 pandemic. The Research Topic has attracted wide attention and generated six multi-disciplinary articles in total.In this Research Topic, a team from Cukurova University (Turkey) and North Carolina A & T State University (United States) conducted a literature review about the impact of COVID-19 pandemic on seafood safety and human health (Rathod et al.). Another team from University of Veterinary Medicine and Pharmacy (Slovakia) and Menoufifia University (Egypt) performed a health risk evaluation of organochlorine pesticide residues in edible tissue of seafood based on one-hundred and twenty random samples from local markets in Mansoura ...
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：
[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.
期刊：
Ecotoxicology and Environmental Safety,2023年262:115137 ISSN：0147-6513
通讯作者：
Yang, Yang
作者机构：
[Zeng, Xinyi; Zeng, Chunyang; Zhang, Qiuguo; Zeng, Qingru; Deng, Xiao; Yang, Yang; Gong, Xiaomin; Zou, Dongsheng] College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, PR China;[Zeng, Xinyi; Zeng, Chunyang; Zhang, Qiuguo; Zeng, Qingru; Deng, Xiao; Gong, Xiaomin; Zou, Dongsheng] Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha 410128, PR China;[Zeng, Xinyi] School of Life Science, Jinggangshan University, Ji'an, Jiangxi 343009, PR China;[Yang, Yang] Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha 410128, PR China. Electronic address: yyss0212@163.com;[Yuan, Haiwei] Hunan Huanbaoqiao Ecology and Environment Engineering Co., Ltd, Changsha, Hunan 410128, PR China
通讯机构：
[Yang Yang] C;College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, PR China<&wdkj&>Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha 410128, PR China
摘要：
Understanding the intricate interplay between Cd accumulation in plants and their rhizosphere micro-characteristics is important for the selection of plant species with profitable Cd phytoextraction and soil remediation efficiencies. This study investigated the differences in rhizosphere micro-ecological characteristics and Cd accumulation in chicory, Ixeris polycephala, sunflower, and Sedum alfredii in low-moderate Cd-contaminated soil. Data reveal that the dominant organic acids in rhizosphere soil that responded to Cd were oxalic and lactic acids in chicory and Ixeris polycephala, tartaric acid in sunflower, and succinic acid in Sedum alfredii. These unique organic acids could also influence the abundance of specific rhizobacterial communities in rhizosphere soil that were Sphingomonadaceae and Bradyrhizobiaceae in both Sedum alfredii (9.75 % and 2.56 %, respectively) and chicory (8.98 % and 2.82 %, respectively) rhizosphere soil, Xanthomonadaceae in both Sedum alfredii and Ixeris polycephala rhizosphere soil, and Gaiellaceae in chicory rhizosphere soil. In this case, the combined effects of the organic acids and unique rhizobacterial communities by plant species increased the bioavailable concentration of Cd in Sedum alfredii, Ixeris polycephala, and sunflower rhizosphere soil, while decreasing the Cd-DOM concentrations in chicory rhizosphere soil and the water-extractable Cd reduced by 88.02 % compared to the control. Though the capacity for Cd accumulation in the shoots of chicory was weaker than of Sedum alfredii but better than either Ixeris polycephala or sunflower, chicory presented better Cd translocation and harbored Cd mainly as the low toxic chemical form of pectates and proteins-bound Cd and Cd oxalate in its shoot. Generally, chicory, as an economic plant, is suitable for phytoremediation of low-moderate Cd-contaminated soil after Sedum alfredii.
摘要：
Accurate prediction of heavy metal accumulation in soil ecosystems is crucial for maintaining healthy soil environments and ensuring high-quality agricultural products, as well as a challenging scientific task. In this study, we constructed a dataset containing 490 sets of multidimensional environmental covariate data and proposed prediction models for heavy metal concentrations (HMC) in a soil-rice system, EL-HMC (including RF-HMC and GBM-HMC), based on Random Forest (RF) and Gradient Boosting Machine (GBM) ensemble learning (EL) techniques. To reasonably evaluate the effectiveness of each model, Multiple linear and Bayesian regressions were selected as benchmark models (BM), and mean absolute error (MAE), root mean square error (RMSE), and determination coefficient R(2) were selected as evaluation indicators. In addition, sensitivity and spatial autocorrelation (SAC) analyses were used to examine the robustness of the model. The results showed that the R(2) values of RF-HMC and GBM-HMC for modeling available cadmium (Cd) concentrations in soil were 0.654 and 0.690, respectively, with an average increase of 48.0% compared to the BMs. The R(2) values of RF-HMC and GBM-HMC for predicting Cd, lead (Pb), chromium (Cr), and mercury (Hg) concentrations in rice ranged from 0.618 to 0.824 and 0.645 to 0.850, respectively, with an average increase of 58.2% compared with the BMs. The corresponding MAEs and RMSEs of RF-HMC and GBM-HMC had low error levels. Sensitivity analysis of the input features and the SAC of the prediction bias showed that the EL-HMC models have excellent robustness. Therefore, the EL technology-based prediction models for HMCs proposed herein are practical and feasible, demonstrating better accuracy and stability than the traditional model. This study verifies the application potential of EL technology in pollution ecology and provides a new perspective and solution for sustainable management and precise prevention of heavy metal pollution in farmland soil at the regional scale.
摘要：
Remediation of CdAs co-contaminated soils has long been considered a difficult problem to solve, as Cd and As have distinctly different metallic characters. Amending contaminated soils with traditional single passivation materials may not always work well in the stabilization of both Cd and As. Here, we reported that analog soil organo-ferrihydrite composites made with either living or non-living organics (bacterial cells or humic acid) could achieve stabilization of both Cd and As in contaminated soils. BCR and Wenzel sequential extractions showed that organo-ferrihydrite, particularly at 1wt% loading, shifted liable Cd and As to more stable phases. Organo-ferrihydrite amendments significantly (p<0.05) increased soil urease, alkaline phosphatase and catalase enzyme activities. With organo-ferrihydrite amendments, the bioavailable fraction of Cd decreased to 35.3% compared with the control (65.1%), while the bioavailable As declined from 29.4% to 12.4%. Soil pH, microbial community abundance and diversity were almost unaffected by organo-ferrihydrite. Ferrihydrite and organo fractions both contributed to direct Cd-binding, while the organo fraction probably maintained the Fe-bound As via lowering ferrihydrite phase transformation. Compared to pure ferrihydrite, organo-ferrihydrite composites performed better not only in reducing liable Cd and As, but also in maintaining soil quality and ecosystem functions. This study demonstrates the applications of organo-ferrihydrite composites in eco-friendly remediation of CdAs contaminated soils, and provides a new direction in selecting appropriate soil amendments.
摘要：
Sulfate affects the transformation of arsenic (As) in soil and its absorption by plant roots. However, the influence of sulfate and irrigation interactions on the mobility of As in the soil-rice system remains poorly understood. To address this gap, we conducted a pot experiment with varying sulfate levels and irrigation modes to examine their effects on rice As translocation, soil As forms, iron plaque formation, and microorganisms involved in As transformation. The addition of exogenous sulfate significantly reduced grain As levels by a maximum of 60.1%, 46.7%, and 70.5% under flooding (F), flooding-moist alternate (FM), moist (M) conditions, respectively. However, the changes in soil available As did not fully correspond to grains As content. Soil available As was only reduced by sulfate under the FM treatment, which limited grains As accumulation under this condition. The reduction in grains As content under F and M conditions was mainly attributed to sulfate-induced increases in soil pH, which in turn inhibited As translocation and promoted iron plaque formation. Additionally, both irrigation mode and sulfate fertilization independently or interactively influenced the abundance of Sulfuritalea, Koribacter, Geobacter, and Sulfuriferula, thereby affecting the As forms in soil through the Fe/S redox process. Specifically, under F and FM conditions, SO(4)(2-)-S inhibited Geobacter but stimulated Fe-oxidizing bacteria, possibly resulting in increased As bound to Fe/Mn oxides (As-F3). Under M condition, SO(4)(2-)-S levels regulated As adsorption and release through the participation of Fe/S cycle bacteria, specifically influencing the adsorbed As fraction (As-F2). Therefore, the addition of SO(4)(2-)-S hindered As translocation to grains by promoting As sequestration in the iron plaque and facilitating microbe-mediated As immobilization through the Fe/S cycle, which was dependent on soil moisture. These results can be used as a guide for sulfur fertilizer application under different soil moisture with the goal of minimizing rice grain As.
摘要：
Long-term consumption of tea with high fluoride (F) content has a potential threat to human health. The application of different amounts of biochar to reduce F accumulation in tea leaves has been little studied. In this study, a pot experiment was conducted to investigate the effect of biochar amounts (0, 0.5%, 2.5%, 5.0%, 8.0%, and 10.0%, w/w) on tea F content during the tea plant growth. Changes in tea quality, soil F fraction, and soil properties caused by biochar and the relationship with tea F accumulation were also considered. The results showed that the application of biochar amendment significantly reduced water-soluble F contents in tea leaves compared to CK (without biochar), especially in the 8.0% treatment (72.55%). Overall, biochar contributed to improving tea polyphenols and caffeine, but had no significant impact on free amino acids and water leachate. Compared with CK, 5.0-10.0% biochar significantly increased soil water-soluble F content due to the substitution of F- with OH- under high pH. Additionally, biochar applied to tea garden soil was effective in decreasing the soil exchangeable aluminum (Ex-Al) content (46.37-91.90%) and increasing the soil exchangeable calcium (Ca2+) content (12.02-129.74%) compared to CK, and correlation analysis showed that this may help reduce F enrichment of tea leaves. In general, the application of 5.0-8.0% biochar can be suggested as an optimal application dose to decrease tea F contents while simultaneously improving tea quality.
