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

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_name

Mar Pollut Bull

authors

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

doi

10.1016/j.marpolbul.2015.08.031

subject

Has Abstract

pub_date

2015-11-15 00:00:00

pages

562-566

issue

1

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(15)00535-4

journal_volume

100

pub_type

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