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[1]CAI Ye,LIN Xiuxiu.Distribution and Influencing Factors of Heavy Metals in Bottom Sediment of Yangtze River Delta Region During Seasons[J].Research of Soil and Water Conservation,2017,24(03):331-338.

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Distribution and Influencing Factors of Heavy Metals in Bottom Sediment of Yangtze River Delta Region During Seasons

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 03 Page number: 331-338 Column: Public date: 2017-06-28

Title:: Distribution and Influencing Factors of Heavy Metals in Bottom Sediment of Yangtze River Delta Region During Seasons

Author(s):: CAI Ye¹, LIN Xiuxiu²; 1. Suzhou Environmental Monitoring Center, Suzhou, Jiangsu 215000, China;
2. College of Education and Humanity, Suzhou Vocational University, Suzhou, Jiangsu 215104, China

Keywords:: Yangtze River Delta; bottom sediment; heavy metals; influencing factors

CLC:: X820

DOI:: -

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.

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