典型城市污染水體底泥中重金屬形態(tài)分布和相關(guān)性

1、方盛榮等：典型城市污染水體底泥中重金屬形態(tài)分布和相關(guān)性 16 14 Pb 2069 45 40 Cu w (Pborg/(mg·kg-1 12 10 8 6 4 2 0 22 23 24 25 26 27 w ( 有機(jī)質(zhì)/( g·kg-1 r = 0.588 w (Cuorg/(mg·kg-1 35 30 25 20 15 10 5 0 22 23 24 25 26 27 w ( 有機(jī)質(zhì)/(g·kg-1 r =0.663 2.5 180 160 140 120 100 80 60 40 20 0 22 23 24 25 26 27 r =0.649 Zn

2、 Cd w (Znorg/(mg·kg-1 w (Cdorg/(mg·kg-1 2 1.5 1 0.5 0 22 23 24 25 w ( 有機(jī)質(zhì)/(g·kg-1 r =0.527 26 27 w ( 有機(jī)質(zhì)/(g·kg-1 45 40 30 25 20 15 10 5 0 22 23 35 Ni 18 16 14 12 10 8 6 4 2 0 Cr w (Crorg/(mg·kg-1 w (Niorg(mg·kg-1 r =0.708 r =0.543 24 25 w ( 有機(jī)質(zhì)/(g·kg-1 26 27 22 23

3、24 25 26 27 w ( 有機(jī)質(zhì)/(g·kg-1 圖2 有機(jī)質(zhì)和有機(jī)結(jié)合態(tài)的相關(guān)性 Fig. 2 Correlation of organic matter and organic bound 100 100 75 T% T% 75 50 50 25 25 2870.08 2926.01 3246.20 1651.07 1533.41 692.44 786.96 2866.22 2927.94 3240.39 1637.56 1531.48 786.96 688.59 0 4000 0 4000 3000 2000 1500 波數(shù)/cm-1 1000 500 3000 2000

4、 1500 波數(shù)/cm-1 1000 500 (a添加重金屬前底泥的紅外圖譜 (b添加重金屬后底泥的紅外圖譜 圖3 S3點(diǎn)底泥和添加重金屬后底泥的紅外譜圖 Fig. 3 Infrared spectroam of sediment in S3 point before and after heavy metals additional 參考文獻(xiàn)： 1 伍鈞, 孟曉霞, 李昆. 鉛污染土壤的植物修復(fù)研究進(jìn)展J. 土壤, 2005, 37 (3: 258-264. WU Jun, MENG Xiao-xia, LI Kun. Phytoremediation of soils contaminat

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12、 Part 17; Allyn and Bacon Inc: Newton , Massachusetts , USA. 1983. 13 Inbar Y, Chen Y, Hadar Y. Solid2state Carbon213 Nuclear magnetic resonance and infrared spectroscopy of composted organic matterJ . Soil Sci AmJ , 1989 , 53：1695-1701. Morphological distribution and correlation of heavy metals in

13、sediment of typical urban polloted water bodies FANG Shengrong2, XU Ying1,2, WEI Xiaoyun2, LU Jingling2 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China; 2. College of Environment Science and Engineering, Hohai University, Nanjin

14、g 210098, China Abstract: Morphological distribution of heavy metals including Pb, Cu, Zn, Cd, Ni, Cr were determined by five steps sequential extraction Tessier methods in 13 bottom sediments of Mochou Lake ,Xuanwu Lake and Qinhuai river in Nanjing.The correlation between leachability and various m

15、orphology,between organic matter and organic matter-bound heavy metals were analyzed. The mechanism of organic matter binding with heavy metal was analysed by using infrared spectroam.The results indicated that Pb, Cu, Zn, Ni, Cr existed mainly in the form of organic- bound and residual, this two fo

16、rms accounted for more than 70% of the total content, Zn and Cd in exchangeable and carbonate-bound phases accounted for a relatively high content, Zn accounted for about 20%, Cd accounted for about 30%;Most of the heavy metal leaching capacity with the exchangeable phases showed a significant corre

17、lation, therefore，it can be controlled the risk of sediment heavy metal contamination by reducing the exchangeable ionic content. The studies also showed that there were a significant positive correlation between organic matter and organic-bound, increasing the concent of organic matter in sediments