Chen Kouping, Jiao Jiu J
Department of Earth Sciences, The University of Hong Kong, Hong Kong, China.
Environ Pollut. 2008 Feb;151(3):576-84. doi: 10.1016/j.envpol.2007.04.004. Epub 2007 May 31.
The concentrations of metals in the buried marine sediment and groundwater were differently affected by land reclamation. Nine metals (V, Cr, Mn, Co, Ni, Cu, Zn, Cd and Pb) in sediment and coastal groundwater from reclamation areas in Shenzhen were examined. The gradually decreased concentrations (V, Cr, Mn, Ni, Cu, Zn) in sediment and relatively higher concentrations (V, Cr, Mn, Co, Ni, Cu and Cd) in groundwater within reclamation areas were observed. The increase of V, Cr, Mn, Ni, Cu and Cd concentrations in groundwater within reclamation areas subsequently after land reclamation should be resulted from the mobilization of these metals accumulated in the sediment. These metals appear to be easily mobilized from solid phase to solution phase after reclamation. The physico-chemical changes such as reduction in pH and salinity in water environment induced by land reclamation appear to be responsible for metal mobility in the sediment-groundwater system.
填海造地对埋藏的海洋沉积物和地下水中金属的浓度产生了不同的影响。对深圳填海区域沉积物和沿海地下水中的9种金属（钒、铬、锰、钴、镍、铜、锌、镉和铅）进行了检测。观察到填海区域沉积物中浓度逐渐降低的金属（钒、铬、锰、镍、铜、锌）以及地下水中相对较高浓度的金属（钒、铬、锰、钴、镍、铜和镉）。填海造地后，填海区域地下水中钒、铬、锰、镍、铜和镉浓度的增加应归因于沉积物中积累的这些金属的活化。这些金属在填海后似乎很容易从固相转移到液相。填海造地引起的水环境中pH值和盐度降低等物理化学变化似乎是沉积物-地下水系统中金属迁移的原因。
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