乳山湾沉积物中酸挥发性硫化物(AVS)的分布变化特征

Distribution and variation of AVS in the sediments of Rushan Bay

2005年12月和2006年3、6、9月，乳山湾滩涂底质环境调查中的16个站点的酸挥发性硫化物（AVS）含量的测定分析结果表明，表层沉积物中AVS具有明显的时、空变化。水平变化范围分别为：春季16．46～230．62mg／kg（干重，下同）、夏季33．65～568．48mg／kg、秋季23．49～350．69mg／kg、冬季15．77～190．96mg／kg，平均值分别为92．82、208．65、177．27和82．87mg／kg。对养殖区与非养殖区AVS含量进行比较，结果表明，养殖区明显高于非养殖区。在深度为0～20cm之间，AVS含量基本是随着深度的增加而增加。本文还就近几年乳山湾东流区表层底质中的AVS含量作了年际比较分析，结果表明，AVS含量年际变化不明显。

Acidic volatile sulfide （AVS） was analyzed for the surface sediment at 16 sampiing stations in Rushan Bay in December, 2005 and March, June and September, 2006, and a significant space and time variation was found for these chemicals. AVS concentrations in the sediment were 16.46～230.62,33.65～ 568.48,23.49～350. 69 ,15. 77～ 190.96 （mg/kg dry weight） in spring, summer, autumn and winter, respectively; for which the average values were 92.82,208.65,177.27 and 82.87mg/kg. The contents of AVS in aquaculture areas were significantly higher than those at non-aquaculture areas. For areas at depths of 0～20 cm, the deeper the bottom, the higher the AVS content was. A comparison was made for the surface sediment of the east stream area of Rushan Bay between different years, and no significant difference was found for AVS content.