Biological aqua crust mitigates metal(loid) pollution and the underlying immobilization mechanisms.
Biological aqua crust mitigates metal(loid) pollution and the underlying immobilization mechanisms.
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生物水结皮减轻了金属（类）污染和潜在的固定机制。
DOI：
10.1016/j.watres.2020.116736
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发表时间：
2020-12
期刊：
影响因子：
12.8
通讯作者：
Qiu Rongliang
中科院分区：
文献类型：
--
作者：
Wang Guobao;Yuan Yongqiang;Morel Jean Louis;Feng Zekai;Chen Daijie;Lu Chunfeng;Guo Meina;Liu Chong;Wang Shizhong;Chao Yuanqing;Tang Yetao;Zhao Dongye;Xiao Shi;Zhang Weixian;Qiu Rongliang
生物结壳介导的生物修复可能是减轻水生生境中金属（类）污染的一种替代策略。为了更好地了解生物结壳在调节金属（样物质）命运中的作用，研究了某典型铅锌尾矿库矿山水体中生物水结壳（BAC）的形态、组成和结构，并测试了其对典型金属（样物质）的固定化效果。与陆地生物外壳不同，BAC是由水生环境中存在的强微生物活性和矿物质化合物产生的化合物组合而成的。BAC具有独特的柔性、海绵状和多孔结构，比表面积为12-22 m2 - 1，能够有效地富集各种金属（样态）s（如cd， 0.26-0.60 g kg - 1, Pb, 0.52-0.66 g kg - 1, As, 10.4-24.3 g kg - 1）。BAC中金属（样态）s（如cd和As）的浓度甚至比源尾矿高3 ~ 7倍，98%以上的固定化金属（样态）s以高度稳定的非edta交换组分存在。黏土矿物（如高岭石）和有机质（2.0 ~ 2.7 wt.%）的吸附是BAC结合金属阳离子的主要机制，而Fe/Mn氧化物（如feooh）的吸附和共沉淀是BAC积累金属（样态）s，特别是As的主要途径。沿排水的金属（样蛋白）的水中浓度的降低可以部分归因于BAC的清除作用。因此，这些发现为从水体中去除金属（样物质）的可能和有效策略提供了新的见解，并强调了BAC作为一种基于自然的解决方案对矿区生物修复的重要作用。
Biocrust-mediatedin situbioremediation could be an alternative strategy to mitigate metal(loid) pollution in aquatic habitats. To better understand the roles of biocrusts in regulating the fate of metal(loid)s, we examined the morphology, composition and structure of biological aqua crusts (BAC) developed in the mine drainage of a representative Pb/Zn tailing pond, and tested their effectiveness for immobilizing typical metal(loid)s. Unlike terrestrial biocrusts, BAC results from an assembly of compounds produced by the strong microbial activity and mineral compounds present in the aquatic environment. The BAC exhibited a unique flexible, spongy and porous structure with a specific surface area of 12-22 m2g−1, and was able to effectively concentrate various metal(loid)s (e.g.Cd, 0.26-0.60 g kg−1; Pb, 0.52-0.66 g kg−1; As, 10.4-24.3 g kg−1). The concentrations of metal(loid)s (e.g.Cd and As) in the BAC were even three to seven times higher than those in the source tailings, and more than 98% of immobilized metal(loid)s were present as the highly stable non-EDTA-exchangeable fraction. Adsorption on the well distributed micro-particles of the clay minerals (e.g.kaolinite) and the organic matters (2.0-2.7 wt.%) were found to be the major mechanisms for BAC to bind metal cations, whereas adsorption and coprecipitation on Fe/Mn oxide (e.g.FeOOH), was proposed to be the dominant pathway for accumulating metal(loid)s, especially As. The decrease in aqueous concentrations of the metal(loid)s along the drainage could be attributed in part to the scavenging effects of the BAC. These findings therefore provide new insights into the possible and efficient strategy for metal(loid) removal from water bodies, and highlighted the important role of BAC as a nature-based solution to benefit the bioremediation of mining area.
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影响因子：
8.8
作者：
M. Mingorance;E. Barahona;J. Fernández-Gálvez
通讯作者：
M. Mingorance;E. Barahona;J. Fernández-Gálvez
DOI：
10.1073/pnas.1515818112
发表时间：
2015-11
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
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B. Weber;Dianming Wu;A. Tamm;Nina Ruckteschler;E. Rodríguez‐Caballero;J. Steinkamp;H. Meusel;W. E
影响因子：
8.9
作者：
C. Rojas;C. Martínez;M. Bruns
通讯作者：
C. Rojas;C. Martínez;M. Bruns
DOI：
10.1080/00908310390232442
发表时间：
2003-10-01
期刊：
ENERGY SOURCES
影响因子：
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作者：
Georgakopoulos, A;Iordanidis, A;Kapina, V
通讯作者：
Kapina, V
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DOI：
10.3390/ijerph14121557
发表时间：
2017-12-12
影响因子：
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作者：
Liang Y;Yi X;Dang Z;Wang Q;Luo H;Tang J
通讯作者：
Tang J