水土保持研究2017，Vol.24Issue(3)：331-338,8.
长江三角洲近岸水域表层沉积物重金属分布特征及其影响因子
Distribution and Influencing Factors of Heavy Metals in Bottom Sediment of Yangtze River Delta Region During Seasons
摘要
Abstract
A survey on the distribution and influencing factors of heavy metals (Ni,Cu,Cr,Zn,Cd and Pb) in bottom sediment of Yangtze River Delta region during seasons between 2014 and 2015 was carried out by using ICP-MS.The results indicated that:(1) the contents of Pb and Zn had the highest percentage of total amount of heavy metals and Hg,Cd had the lowest percentages of total amount of heavy metals,and all the heavy metal contents showed were higher in winter and autumn than those in summer and spring;(2) the contents of Cu,Cr and Ni existed in the form of acid soluble state with organic combination,Zn and Cd in water soluble form,Pb evenly distributed in five kinds of forms,and Pb had a good stability,low biological availability;(3) the values of pH and conductivity were lower in winter and autumn than those in summer and spring with significant difference in each season (p＜0.05),and the contents of nutrients were higher in winter and autumn than those in summer and spring,and the contents of the total nitrogen and total potassium had a significant difference in each season (p＜0.05);(4) the acid soluble state of Cr,Pb and Cd had a significant positive correlation with total heavy metals (p＜0.05),but the reduction state had no significant correlation with residual state (p＜0.05);(5) according to Pearson correlation analysis,pH value and conductivity were significantly negatively correlated with heavy metals (p＜ 0.05);nutrients were significantly positively correlated with heavy metals (p＜0.05),therefore,the total carbon was the important factor influencing heavy metals.关键词
长江三角洲/沉积物/重金属/影响因子Key words
Yangtze River Delta/bottom sediment/heavy metals/influencing factors分类
资源环境引用本文复制引用
蔡晔,林休休..长江三角洲近岸水域表层沉积物重金属分布特征及其影响因子[J].水土保持研究,2017,24(3):331-338,8.基金项目
国家“十二五”水体污染控制与治理科技重大专项“太湖流域(江苏)水生态监控系统建设与业务化运行示范”(2012ZX07506-003) （江苏）
