Oxidative Dissolution of Sulfide Minerals Tends to Accumulate More Dissolved Heavy Metals in Deep Seawater Environments than in Shallow Seawater Environments

doi:10.1021/acs.est.3c07507

IOCAS-IR > 海洋地质与环境重点实验室

	Oxidative Dissolution of Sulfide Minerals Tends to Accumulate More Dissolved Heavy Metals in Deep Seawater Environments than in Shallow Seawater Environments
	Hu, Siyi1,2 ; Tao, Chunhui 1,5; Liao, Shili 1; Guan, Yao 2; Yin, Xuebo 3; Zhu, Chuanwei 4; Liang, Jin 1; Guo, Zhikui 1
	2023-12-05
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	57 期号:50 页码:21438-21447
通讯作者	Tao, Chunhui([email protected])
摘要	Deep-sea mining magnifies the release of heavy metals into seawater through oxidative dissolution of seafloor massive sulfide (SMS). At present, there is little information about how the metals released into seawater might be affected by the mineral assemblages, seawater conditions, and solid percentages. Here, leaching experiments were carried out to examine the behavior of three sulfides from the Southwest Indian Ridge, under conditions that replicated deep and shallow seawater environments at three solid-liquid ratios. The results demonstrated that sphalerite dissolved rapidly, and the metals released in both experimental conditions were comparable, potentially reflecting galvanic interactions between the sulfide minerals. Large quantities of the released metals were removed from the solutions when hydrous ferric oxides formed, especially for shallow seawater conditions. A comparison of metal concentrations in the leachates with the baseline metal concentrations in natural seawater indicated that most of the released metals, when diluted with seawater, would not have widespread impacts on ecosystems. Based on the obtained unique oxidative dissolution properties of each SMS at variable solid-liquid ratios, targeted wastewater discharge treatments are proposed to minimize impacts from the dissolved metals. This study will support the development of robust guidelines for deep-sea mining activities.
关键词	seafloor massive sulfide oxidative dissolution heavy metals leaching experiment deep-sea mining galvanic interaction
DOI	10.1021/acs.est.3c07507
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42127807]; National Natural Science Foundation of China[JB2203]; National Natural Science Foundation of China[SZ2201]; Scientific Research Fund of the Second Institute of Oceanography, MNR[2021M693778]; China Postdoctoral Science Foundation
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:001142946400001
出版者	AMER CHEMICAL SOC
WOS关键词	FLOOR MASSIVE SULFIDES ; X-RAY PHOTOELECTRON ; HYDROTHERMAL FIELD ; TRACE-METALS ; FERRIC ION ; SEA ; ZN ; CHALCOPYRITE ; DRAINAGE ; DEPOSITS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184288
专题	海洋地质与环境重点实验室
通讯作者	Tao, Chunhui
作者单位	1.Minist Nat Resources, Inst Oceanog 2, Key Lab Submarine Geosci, Hangzhou 310012, Peoples R China 2.Minist Nat Resources, Inst Oceanog 4, Guangxi Key Lab Beibu Gulf Marine Resources Enviro, Beihai 536000, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, State Key Lab Ore Deposit Geochem, Inst Geochem, Guiyang 550081, Peoples R China 5.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Hu, Siyi,Tao, Chunhui,Liao, Shili,et al. Oxidative Dissolution of Sulfide Minerals Tends to Accumulate More Dissolved Heavy Metals in Deep Seawater Environments than in Shallow Seawater Environments[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2023,57(50):21438-21447.
APA	Hu, Siyi.,Tao, Chunhui.,Liao, Shili.,Guan, Yao.,Yin, Xuebo.,...&Guo, Zhikui.(2023).Oxidative Dissolution of Sulfide Minerals Tends to Accumulate More Dissolved Heavy Metals in Deep Seawater Environments than in Shallow Seawater Environments.ENVIRONMENTAL SCIENCE & TECHNOLOGY,57(50),21438-21447.
MLA	Hu, Siyi,et al."Oxidative Dissolution of Sulfide Minerals Tends to Accumulate More Dissolved Heavy Metals in Deep Seawater Environments than in Shallow Seawater Environments".ENVIRONMENTAL SCIENCE & TECHNOLOGY 57.50(2023):21438-21447.

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