20年8月24日文獻情報
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本次文獻簡報涉及土壤有機碳的時空分布及其驅動因子[1]，水體微生物對木質素源芳芳香化合物降解[2]，有機碳添加對PCB生物降解影響[3]，高嶺石-腐殖酸複合材料吸附草甘膦[4]，生物炭修復海岸鹽鹼土壤Cd汙染[5]，生物炭對Cd汙染的植物修復作用[6]，土壤有機碳增加縮短我國小麥產量差距[7]，殺藻細菌過程中有機質變化[8]，大分子有機質對Tl在多孔介質中的遷移[9]。
1. 題目: Spatiotemporal variations in soil organic carbon and their drivers in southeastern China during 1981-2011文章編號: N20082409
期刊: Soil and Tillage Research
作者: Enze Xie, Yanxia Zhang, Biao Huang, Yongcun Zhao, Xuezheng Shi, Wenyou Hu, Mingkai Qu
更新時間: 2020-08-24
摘要: Understanding the spatiotemporal distribution of soil organic carbon (SOC) and its controlling factors is extremely important for improving soil quality and developing sustainable management practices. We quantified spatiotemporal variations in SOC in three typical regions (Shuyang, Rugao, and Shanghai) in southeastern China during 1981–2011, by using geographically weighted regression (GWR), and explored the drivers with a geographical detector method. A total of 219 topsoil samples were collected in the three regions to measure the SOC in 2011, and a total of 109 SOC data for 1981 were obtained from the soil survey reports of Shuyang, Rugao, and Shanghai, which involved in the database of the second national soil survey of China. The results showed that the mean SOC contents in 2011 were 14.68 g kg−1, 9.55 g kg−1, and 18.00 g kg−1 in Shuyang, Rugao, and Shanghai, respectively. The topography (q = 0.60) and the sand content of the soil (q = 0.70) were the main drivers of the spatial variability in the SOC in Shuyang and Rugao, while the carbon inputs (q = 0.68) predominantly explained the spatial heterogeneity of the SOC in Shanghai. Significant increases in SOC storage occurred in Shuyang and Rugao from 1981 to 2011, with increase rates of 0.55 t ha−1 yr−1 and 0.26 t ha−1 yr−1, respectively. Land use change (dryland farming to rice cultivation) was identified as the largest driver of the SOC increases in Shuyang and Rugao (q values of 0.16 and 0.09, respectively), followed by increasing carbon inputs (0.14 and 0.07). However, the SOC storage in Shanghai rapidly decreased at a rate of −0.38 t ha−1 yr−1 during 1981–2011. The land use change from wetlands to rice cultivation was the primary reason for the decreasing SOC (q = 0.24), and a net decrease in carbon inputs between 1981 and 2011 was another main driver of the reduction in the SOC in Shanghai (q = 0.14). Our results from this study provide important information on the spatiotemporal changes in SOC and its drivers to the scientific community and decision-makers, for the development of management strategies to sustain soil fertility in many areas with rapid economic development and increasing populations.
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2. 題目: Unraveling bacteria-mediated degradation of lignin-derived aromatic compounds in a freshwater environment文章編號: N20082408
期刊: Science of the Total Environment
作者: Jialing Li, Pandeng Wang, Nimaichand Salam, Xin Li, Manzoor Ahmad, Ye Tian, Li Duan, Linan Huang, Min Xiao, Xiaozhen Mou, Wenjun Li
更新時間: 2020-08-24
摘要: Terrestrial organic carbon-lignin plays a crucial role in the global carbon balance. However, limited studies presented the functional and ecological traits of lignin decomposers population in natural aquatic ecosystem. In this study, we performed a multi-omics analysis by deploying amplicon, metagenomic, and metatranscriptomic approaches to identify the key potential degraders and pathways involved lignin-derived aromatic compounds in the later stage of lignin degradation. By establishing microcosms with model lignin-derived aromatic compound (vanillic acid, VAN), based on the estimated absolute abundance (EAA) and the metagenome-assembled genomes (MAGs), novel potential lignin-derived aromatic compounds degraders were identified in the aquatic ecosystem. Furthermore, members of the phyla Proteobacteria and Actinobacteria were the potential major lignin-derived aromatic compounds degraders in the studied ecosystem. Our study demonstrated that genomes of the class Betaproteobacteria (Proteobacteria) possess a complete enzymatic system for the degradation of diarylpropanes, vanillate and protocatechuate, besides having the capacity to degrade other lignin-derived aromatic compounds. This study provides strong evidence for the ability of aquatic bacteria to degrade lignin-derived aromatic compounds and suggest that different microbes might occupy different niches in the later stage of lignin degradation.
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3. 題目: A new dataset of PCB half-lives in soil: Effect of plant species and organic carbon addition on biodegradation rates in a weathered contaminated soil文章編號: N20082407
期刊: Science of the Total Environment
作者: Elisa Terzaghi, Elena Alberti, Giuseppe Raspa, Elisabetta Zanardini, Cristiana Morosini, Simone Anelli, Stefano Armiraglio, Antonio Di Guardo
更新時間: 2020-08-24
摘要: This paper presents a new dataset of Polychlorinated Biphenyls (PCBs) half-lives in soil. Data were obtained from a greenhouse experiment performed with an aged contaminated soil under semi-field conditions, collected from a National Relevance Site (SIN) located in Northern Italy (SIN Brescia-Caffaro). Ten different treatments (combination of seven plant species and different soil conditions) were considered together with the respective controls (soil without plants). PCB concentration reduction in soil was measured over a period of 18 months to evaluate the ability of plants to stimulate the biodegradation of these compounds. Tall fescue, tall fescue cultivated together with pumpkin and tall fescue amended with compost reduced more than the 50% of the 79 measured PCB congeners, including the most chlorinated ones (octa to deca-PCBs). However, the data obtained showed that no plant species was uniquely responsible for the effective degradation of all isomeric classes and congeners. The obtained half-lives ranged from 1.3 to 5.6 years and were up to a factor of 8 lower compared to generic HL values reported in literature. This highlighted the importance of cultivation and plant-microbe interactions in speeding up the PCB biodegradation. This new dataset could contribute to substantially improve the predictions of soil remediation time, multimedia fate and the long-range transport of PCBs. Additionally, the half-lives obtained here can also be used in the evaluation of the food chain transfer of these chemicals, and finally the exposure and potential for effects on ecosystems.
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4. 題目: Glyphosate adsorption onto kaolinite and kaolinite-humic acid composites: Experimental and molecular dynamics studies文章編號: N20082406
期刊: Chemosphere
作者: Fayang Guo, Min Zhou, Jingcheng Xu, Jeremy B. Fein, Qiang Yu, Yingwei Wang, Qiaoyun Huang, Xingmin Rong
更新時間: 2020-08-24
摘要: Glyphosate (PMG) has been the most widely used herbicide in the world, and its environmental mobility and fate are mainly controlled by interactions with mineral surfaces. In soil systems, kaolinite is typically associated with humic acids (HAs) in the form of mineral-HA complexes, and hence it is crucial to characterize the molecular-scale interactions that occur between PMG and kaolinite and kaolinite-HA complexes. Batch experiments, Fourier transform infrared spectrum (FTIR) and X-ray photoelectron spectroscopy (XPS), isothermal titration calorimetry (ITC), and molecular dynamics (MD) simulations were performed to decipher the molecular interactions between PMG and kaolinite and kaolinite-HA composites. Our results reveal that kaolinite-HA composites adsorb higher concentrations of PMG than does kaolinite alone, likely due to more adsorption sites existed on kaolinite-HA than on kaolinite. FTIR and XPS analysis reveal that the carboxyl, phosphonyl and amino groups of PMG interacted with kaolinite and kaolinite-humic acid via Hydrogen bonds. The ITC results and interaction energy calculations indicate that the adsorption of PMG onto the kaolinite-HA is more energetically favorable relative to that onto kaolinite. MD simulations suggest that the PMG molecule adsorbs parallel to the surface of kaolinite and the composites through hydrogen bonding. Humic acid increases the adsorption of PMG through the creation of H-bond networks between PMG, the kaolinite surface, and humic acid. The results from this study improve our molecular-level understanding of the interactions between PMG and two important components of soil systems, and hence yield valuable information for characterizing the fate and behavior of PMG in soil environments.
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5. 題目: Remediation of cadmium-contaminated coastal saline-alkaline soil by Spartina alterniflora derived biochar文章編號: N20082405
期刊: Ecotoxicology and Environmental Safety
作者: Jing-Fang Cai, Li Zhang, Yu Zhang, Ming-Xiang Zhang, Hong-Li Li, Hui-Juan Xia, Wei-Jing Kong, Fei-Hai Yu
更新時間: 2020-08-24
摘要: Following oil extraction in the wetland of the Yellow River Delta, heavy metal contamination of coastal saline-alkaline soil, especially with cadmium (Cd), has become a serious environmental problem in some regions. Biochar application has been proposed to remedy Cd-contaminated soil, but the remediation effect is related to preparation conditions of biochar (e.g., pyrolysis temperature and raw material) and soil properties. The invasive plant, Spartina alterniflora, produces a high amount of biomass, making it suitable for biochar production in coastal China. We investigated the effect of S. alterniflora-derived biochar (SDB) pyrolyzed at four temperatures (350, 450, 550, and 650 °C) crossed with three addition ratios (1, 5, and 10%) and control on Cd contamination of coastal saline-alkaline soil. Pyrolysis temperature affected pH, surface area, and functional groups of SDB. SDB markedly improved soil pH and soil organic matter, but the degree of improvement was affected by pyrolysis temperature and addition ratio. SDB significantly altered available Cd content in soil, but reduced it only at low pyrolysis temperatures (350 and 450 °C). Available Cd content had a positive correlation with soil pH (R2 = 0.298, P < 0.01), but was not related to salinity and soil organic matter content. Thus, SDB pyrolyzed at 350 °C with 5% addition was optimal for passivating Cd in coastal saline-alkaline soil, since available Cd content in soil decreased mostly (by 26.9%). These findings act as a reference for the development of an application strategy for SDB to ameliorate Cd-contaminated coastal saline-alkaline soil.
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6. 題目: Effect of cornstalk biochar on phytoremediation of Cd-contaminated soil by Beta vulgaris var. cicla L文章編號: N20082404
期刊: Ecotoxicology and Environmental Safety
作者: Panxue Gu, Yanming Zhang, Huanhuan Xie, Jing Wei, Xinying Zhang, Xun Huang, Jiayi Wang, Xinyi Lou
更新時間: 2020-08-24
摘要: Cadmium (Cd) contamination is the most common and extensive heavy metal pollution in the farmland of China. Phytoremediation is considered as a promising measure for Cd-contaminated soil remediation, but the remediation efficiency still needs to be enhanced. Biochar as an effective amendment medium is widely manufactured and studied for the soil remediation of heavy metals. In this study, a greenhouse pot trial was conducted to investigate the effects of cornstalk biochar on Cd accumulation of Beta vulgaris var. cicla L. (Beta vulgaris) in Cd contaminated soil. The Cd availability, speciation and nutrients in soil, biomass and Cd chemical forms in the Beta vulgaris root were studied to explore the mechanism that how the cornstalk biochar promoted Cd accumulation in Beta vulgaris. Biochar amendment reduced the DTPA-extractable Cd concentration and stimulated the growth of root. Compared to the Beta vulgaris without biochar treatment, the results of 5% biochar amendment showed that the root dry weight of Beta vulgaris increased to 267%, Cd accumulation in Beta vulgaris increased to 206% and the Cd concentration in leaves and roots increased by 36% and 52%, respectively. Additionally, after 5% biochar was applied to soil, the total content of organic matter-bound Cd and residual Cd increased by 38%, while the content of Fe–Mn oxides-bound Cd decreased by 40%. Meanwhile, Cd may mainly bind to the root cell wall and the ratio of NaCl-extracted Cd to HAc-extracted Cd increased to 166% with 5% biochar amendment. According to our study, Cd in soil can be removed by Beta vulgaris and phytoremediation efficiency can be improved with biochar amendment. The combination of phytoremediation and biochar amendment is a promising strategy for the Cd-contaminated soil remediation.
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7. 題目: Increasing soil organic carbon sequestration to close the yield gap in Chinese wheat production文章編號: N20082403
期刊: Land Degradation and Development
作者: Yifan Guo, Mingyou Chen, Junxiao Pan, Yiwei Shang, Xingjie Wu, Zhenling Cui
更新時間: 2020-08-24
摘要: Managing soil organic carbon (SOC) to maximize crop yield is a vital strategy to feed the world's growing population. However, the low SOC contents in agricultural soils limited the maximization of wheat yield. Here, we used modeling and a long‐term field experiment to determine whether improved crop management (IM), and an integrated procedure that combined IM with manure application (IMsoil) would close the yield gap while increase SOC sequestration during wheat (Triticum aestivum L.) production in China. The yield of conventional farmers' practice (CM) operating with high fertilizer inputs, suboptimal management, and straw removal was 5.3 Mg ha‐1, reaching 48% of yield potential (Yp, 11.0 Mg ha‐1) while reducing SOC sequestration during the year 2012 to 2019. The IM procedure with optimized density, planting dates, and nutrient management increased yield to 8.0 Mg ha–1 (i.e., 73% of Yp), and increased SOC sequestration. The IMsoil treatment further elevated wheat yield to 9.3 Mg ha‐1 (i.e., 85% of Yp) by increasing spike number and pre‐anthesis dry matter accumulation. The SOC sequestration in the IMsoil increased by 15.4 Mg C ha–1 at a rate of 2.20 Mg C ha–1 year–1 through large C inputs and high SOC transfer efficiencies compared with the beginning of this experiment. These results highlight the importance of combining optimized crop managements with soil amendment to close the yield gap with less fertilizer inputs while contribute to sustainable agriculture objectives.This article is protected by copyright. All rights reserved.
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8. 題目: Facilitating harmful algae removal in fresh water via joint effects of multi-species algicidal bacteria文章編號: N20082402
期刊: Journal of Hazardous Materials
作者: Lei He, Ziyuan Lin, Yingmu Wang, Xuejie He, Jiong Zhou, Maoquan Guan, Jian Zhou
更新時間: 2020-08-24
摘要: Harmful algae blooms posing serious threats to the ecological environment occur frequently across the world. Multi-species algicidal bacteria were enriched by utilizing immobilized carriers in a pilot scale experiment, which significantly promoted the effect of algal control in the reactors. Under the optimal condition, the algicidal ratio and chlorophyll a degradation rate reached 87.69% and 47.00 μg/(L·d), respectively. The growth of Cyanophyta, diatom, Dinoflagellate and Cryptophyta was inhibited significantly by the joint action of algicidal bacteria and light shading of fillers, accounting for 53.74% and 36.47%, respectively. The results of 16S rRNA high-throughput sequencing suggested algicidal bacteria (10.17%) belonging to 13 genera were enriched. Among the algicidal process, Bacillus and Pseudomonas played crucial roles. Fluorescence spectroscopy and UV254 were adopted to assess the release of dissolved organic matter (DOM) and the precursors of disinfection by-products (DBPs). Two efficient algicidal strains (C1, C4) were isolated which showed high homology with Enterobacter asburiae JCM6051(T) and Pseudomonas simiae oli(T), respectively. This study provided new insights into the in-situ bioremediation of eutrophication in fresh water.
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9. 題目: Transport of Tl(I) in water-saturated porous media: Role of carbonate, phosphate and macromolecular organic matter文章編號: N20082401
期刊: Water Research
作者: Hainan Wang, Juchao Liu, Jinni Yao, Qiang He, Jun Ma, Hongxiang Chai, Caihong Liu, Xuebin Hu, Yao Chen, Yijie Zou, Jiaming Xiong, Xiaoliu Huangfu
更新時間: 2020-08-24
摘要: Understanding the transport behaviors of thallium (Tl) in porous media is of considerable interest for both natural soils and artificial filtration removal of Tl. In this context, the transport behaviors of Tl(I) in water-saturated sand columns under different conditions were systematically investigated. It was found that, in addition to the effects of pH and ionic strength (IS), the transport of Tl(I) depended on the carbonate, phosphate and macromolecular organic matter as well. Tl(I) broken the columns more difficultly under higher pH and lower IS conditions. Moreover, the adsorption of carbonate and phosphate on sand surfaces may increase the retention of Tl(I) in columns. As for macromolecular organic matter, humic acid (HA) facilitated Tl(I) transport, especially under neutral and alkaline conditions (7.0 and 9.8), which was possibly associated with Tl-complexes formation and competed adsorption between Tl(I) and HA. However, bovine serum albumin (BSA) impeded Tl(I) transport for the reason that deposited BSA might provide more adsorption sites for Tl(I), though Tl(I) had a slight effect on BSA transport. In order to evaluate the mechanisms of transport, a dual-sites non-equilibrium model was applied to fit the breakthrough curves of Tl(I). Retardation factor (R) values of individual Tl(I) transport from model calculations were found to be higher than that of Tl(I) transport with HA and lower than that of Tl(I) transport with BSA. The fraction of instantaneous sorption sites (β) was found to decrease with increasing pH, implying nonequilibrium sorption is a main sorption mechanism of Tl(I) with pH increasing. The fundamental data obtained herein demonstrated that carbonate, phosphate and macromolecular organic matter significantly influenced the Tl(I) migration and could lead to the leaking or bindings of Tl(I) at Tl-occurring sites.
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