长江口颗粒态金属污染物时空分布规律分析  

Spatial and temporal distribution of particulate metal pollutants in Changjiang Estuary

作　　者：刘启贞[1] 李九发[2] 戴志军[2] 赵建春[2] 冯凌旋[2] 

机构地区：[1]上海市环境监测中心,上海200030 [2]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《海洋环境科学》2009年第3期251-256,共6页Marine Environmental Science

基　　金：国家自然科学基金(50579021)

摘　　要：长江口金属污染物的输移转化受到多种因素作用的制约,其时空分布比较复杂。2006年洪、枯季长江口南槽和北槽调查研究表明:(1)悬沙中各种金属含量在长江口的沿程分布略有差异,除Cu、Cd沿程出现降低趋势外,其它金属均有"低-高-低"分布趋势,即在南槽、北槽最大浑浊带出现高值;而沉积物中颗粒态金属含量沿程分布较为复杂,沿程呈降低趋势,部分金属在南槽、北槽出现高值区;(2)颗粒态金属含量垂向分布十分明显,由表层悬沙至底泥逐渐减少;(3)悬沙中枯季金属含量明显高于洪季,在一个潮周期内急流时颗粒态金属含量小于憩流时金属含量。The transportation and transformation of particulate metal pollutants in the Changjiang Estuary is effected by many parameters, so the spatial and temporal distribution is rather complicated. The results obtained from South Passage and North Passage in the different season in 2006 show that （ 1 ） though the spatial distribution of the concentration of particulate metal pollutants in suspended particle is different, the concentration of most metal pollutants appear ＂ low-high-low＂ trends. The spatial distribution of the concentration of particulate metal pollutants in suspended particle is rather complicated, but it has the obvious decrease trend, while a part of metal pollutants appear higher values. （ 2 ） There is an obvious decrease trend in the vertical of the concentration of particulate metal pollutants. （3） The concentration is higher in the dry season than flood season, and it is lower in the flood tidal than ebb tidal.

关 键 词：长江口 颗粒态金属 悬移质 底质 洪季 枯季 

分 类 号：P734.4[天文地球—海洋化学]