干旱区生态环境知识资源中心(Arid): Vertical distribution of arsenic and bacterial communities in calcareous farmland amending by organic fertilizer and iron-oxidizing bacteria: Field experiment on concomitant remediation

Arid

DOI	10.1016/j.jhazmat.2024.134415
	Vertical distribution of arsenic and bacterial communities in calcareous farmland amending by organic fertilizer and iron-oxidizing bacteria: Field experiment on concomitant remediation
	Ning, Xiang; Long, Song; Liu, Zitong; Dong, Yinwen; He, Liang; Wang, Shengli
通讯作者	Wang, SL
来源期刊	JOURNAL OF HAZARDOUS MATERIALS
ISSN	0304-3894
EISSN	1873-3336
出版年	2024
卷号	471
英文摘要	The migration and transformation mechanisms of arsenic (As) in soil environments necessitate an understanding of its influencing processes. Here, we investigate the subsurface biogeochemical transformation of As and iron (Fe) through amended in the top 20 cm with iron oxidizing bacteria (FeOB) and organic fertilizer (OF). Our comprehensive 400 -day field study, conducted in a calcareous soil profile sectioned into 20 cm increments, involved analysis by sequential extraction and assessment of microbial properties. The results reveal that the introduction of additional OF increased the release ratio of As/Fe from the non-specific adsorption fraction (136.47 %) at the subsoil depth (40 - 60 cm), underscoring the importance of sampling at various depths and time points to accurately elucidate the form, instability, and migration of As within the profile. Examination of bacterial interaction networks indicated a disrupted initial niche in the bottom layer, resulting in a novel cooperative symbiosis. While the addition of FeOB did not lead to the dominance of specific bacterial species, it did enhance the relative abundance of As -tolerant Acidobacteria and Gemmatimonadetes in both surface (39.2 % and 38.76 %) and deeper soils (44.29 % and 23.73 %) compared to the control. Consequently, the amendment of FeOB in conjunction with OF facilitated the formation of poorly amorphous Fe (hydr)oxides in the soil, achieved through abiotic and biotic sequestration processes. Throughout the long-term remediation process, the migration coefficient of bioavailable As within the soil profile decreased, indicating that these practices did not exacerbate As mobilization. This study carries significant implications for enhancing biogeochemical cycling in Ascontaminated Sierozem soils and exploring potential bioremediation strategies. Environmental implication: The long-term exposure of sewage irrigation has potential adverse effects on the local ecosystem, causing serious environmental problems. Microorganisms play a vital role in the migration and transformation of arsenic in calcareous soil in arid areas, which highlights the necessity of understanding its dynamics. The vertical distribution, microbial community and fate of arsenic in calcareous farmland soil profile in northwest China were studied through field experiments. The results of this work have certain significance for the remediation of arsenic -contaminated soil in arid areas, and provide new insights for the migration, transformation and remediation of arsenic in this kind of soil.
英文关键词	Arsenic mobilization Microbial properties Chemical forms Organic matter -iron oxide
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001235812000001
WOS关键词	HEAVY-METALS ; MINING AREA ; SURFACE COMPLEXATION ; RISK-ASSESSMENT ; SOILS ; MATTER ; MOBILIZATION ; SPECIATION ; GROUNDWATER ; MOBILITY
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404533
推荐引用方式 GB/T 7714	Ning, Xiang,Long, Song,Liu, Zitong,et al. Vertical distribution of arsenic and bacterial communities in calcareous farmland amending by organic fertilizer and iron-oxidizing bacteria: Field experiment on concomitant remediation[J],2024,471.
APA	Ning, Xiang,Long, Song,Liu, Zitong,Dong, Yinwen,He, Liang,&Wang, Shengli.(2024).Vertical distribution of arsenic and bacterial communities in calcareous farmland amending by organic fertilizer and iron-oxidizing bacteria: Field experiment on concomitant remediation.JOURNAL OF HAZARDOUS MATERIALS,471.
MLA	Ning, Xiang,et al."Vertical distribution of arsenic and bacterial communities in calcareous farmland amending by organic fertilizer and iron-oxidizing bacteria: Field experiment on concomitant remediation".JOURNAL OF HAZARDOUS MATERIALS 471(2024).