Tungsten- and cobalt-dominated heavy metal contamination of mangrove sediments in Shenzhen, China

Xu, S; Lin, C; Qiu, P; Song, Y; Yang, W; Xu, G; Feng, X; Yang, Q; Yang, X; Niu, A

Abstract

A baseline investigation into heavy metal status in the mangrove sediments was conducted in Shenzhen, China where rapid urban development has caused severe environmental contamination. It is found that heavy metal contamination in this mangrove wetland is characterized by the dominant presence of tungsten and cobalt, which is markedly different from the neighboring Hong Kong and other parts of the world. The vertical variation pattern of these two metals along the sediment profile differed from other heavy metals, suggesting an increasing influx of tungsten and cobalt into the investigated mangrove habitat, as a result of uncontrolled discharge of industrial wastewater from factories that produce or use chemical compounds or alloys containing these two heavy metals. Laboratory simulation experiment indicated that seawater had a stronger capacity to mobilize sediment-borne tungsten and cobalt, as compared to deionized water, diluted acetic, sulfuric and nitric acids.

• Journal Article Type: Article
• Acceptance Date: Aug 12, 2015
• Online Publication Date: Aug 29, 2015
• Publication Date: Aug 29, 2015
• Deposit Date: Sep 17, 2015
• Journal: Marine Pollution Bulletin
• Print ISSN: 0025-326X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 100
• Issue: 1
• Pages: 562-566
• DOI: https://doi.org/10.1016/j.marpolbul.2015.08.031
• Publisher URL: http://dx.doi.org/10.1016/j.marpolbul.2015.08.031
• Related Public URLs: http://www.journals.elsevier.com/marine-pollution-bulletin/
• Additional Information: Funders : Natural Science Foundation of China; Grant Number: 41271060