The origin, historical variations, and distribution of heavy metals in the Qiongzhou Strait and nearby marine areas
Zhang, ZQ; Chen, L; Wang, WP; Li, TJ; Zu, TT; chenliang@smes.gz.cn
2017
发表期刊JOURNAL OF OCEAN UNIVERSITY OF CHINA
卷号16期号:2页码:262-268
摘要We analyzed heavy metal concentrations in a number of surface sediments and cores from the Qiongzhou Strait and surrounding marine areas. The areas of high concentrations are primarily outside the eastern mouth of the Qiongzhou Strait and on the west side of the Leizhou Peninsula, whereas the areas of low concentrations are located primarily in the eastern Qiongzhou Strait. The maximum Cd, Pb and Zn concentrations in the samples collected in our study do not exceed the official standards for marine sediments, whereas the concentrations of Cr and Cu slightly exceed the standards. Correlations exist between the concentrations of Cu, Pb, Zn, Cr and Cd, and the concentrations of these metals are positively correlated with the mean particle size (phi value), indicating that the finer sediments have adsorbed greater amounts of heavy metal elements than the coarser sediments. An evaluation of the potential environmental risks demonstrates that certain indices of heavy metal pollution and environmental risks are relatively low and may be assigned low risk levels, thereby indicating that, in terms of heavy metals, the marine sedimentary environment in this region is only mildly impacted. Our analysis of the contaminant origins shows that the heavy metals in this region primarily originate in the Pearl River Estuary and that a small amount of them is derived from local runoff. The elevated heavy metal concentrations from the upper sections of the cores started 130 years ago, which indicats that heavy metals in the surface sediments are primarily due to human activities associated with industrialization.
部门归属[Zhang, Zhiqiang] Chinese Acad Sci, CAS Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Zhang, Zhiqiang; Chen, Liang; Wang, Weiping; Li, Tuanjie] State Ocean Adm, South China Sea Branch, Guangzhou 510300, Guangdong, Peoples R China; [Zu, Tingting] Chinese Acad Sci, South China Sea Branch, Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
关键词Heavy Metals Sediment Origin Qiongzhou Strait
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16442
专题热带海洋环境国家重点实验室(LTO)
通讯作者chenliang@smes.gz.cn
推荐引用方式
GB/T 7714
Zhang, ZQ,Chen, L,Wang, WP,et al. The origin, historical variations, and distribution of heavy metals in the Qiongzhou Strait and nearby marine areas[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2017,16(2):262-268.
APA Zhang, ZQ,Chen, L,Wang, WP,Li, TJ,Zu, TT,&chenliang@smes.gz.cn.(2017).The origin, historical variations, and distribution of heavy metals in the Qiongzhou Strait and nearby marine areas.JOURNAL OF OCEAN UNIVERSITY OF CHINA,16(2),262-268.
MLA Zhang, ZQ,et al."The origin, historical variations, and distribution of heavy metals in the Qiongzhou Strait and nearby marine areas".JOURNAL OF OCEAN UNIVERSITY OF CHINA 16.2(2017):262-268.
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