环境条件对上海蕴藻浜水体沉积物Ni释放影响的研究
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摘要
通过改变环境条件(温度、pH、溶解氧),并采用Tessier五步连续提取法,研究了温度、pH和溶解氧对蕴藻浜沉积物中Ni的释放的影响,并对不同条件下的沉积物释放前后Ni的形态进行了对比分析.结果表明:随着温度的升高,沉积物对Ni的释放通量升高,可交换态、铁锰氧化物结合态以及有机物结合态在沉积物中所占百分比均上升;随着pH的增加,沉积物对Ni的释放通量下降,可交换态、碳酸盐结合态、铁锰氧化物结合态以及有机结合态所占百分比均有不同程度的增加;而溶解氧高的水体比溶解氧较低的水体更不容易释放Ni.
The effect of environmental conditions on the Ni release in the Yunzaobang River sediment was studied with Tessier continuous extraction method under different temperature of water body,pH,and concentration of dissolved oxygen.The speciation of Ni in the release process was also analyzed.The results showed that with the temperature increasing,the Ni release in the sediment increased.With the rising of pH,the Ni release decreased.The higher concentration of dissolved oxygen does little favor to the Ni release.With the change of water conditions,the five speciation of Ni,exchangeable,carbonate bound,Fe-Mn oxide,organic,and residual forms in the sediment,were also changed to some degree.
The effect of environmental conditions on the Ni release in the Yunzaobang River sediment was studied with Tessier continuous extraction method under different temperature of water body,pH,and concentration of dissolved oxygen.The speciation of Ni in the release process was also analyzed.The results showed that with the temperature increasing,the Ni release in the sediment increased.With the rising of pH,the Ni release decreased.The higher concentration of dissolved oxygen does little favor to the Ni release.With the change of water conditions,the five speciation of Ni,exchangeable,carbonate bound,Fe-Mn oxide,organic,and residual forms in the sediment,were also changed to some degree.
引文
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[19]路永正,董德明,沈秀娥,等.曝气对河流沉积物中重金属Cu,Pb,Zn和Cd释放的影响[J].吉林大学学报:理学版,2005,43(6):185-189.
[20]文湘华,ALLEN H E.乐安江沉积物酸可挥发硫化物含量及溶解氧对重金属释放特性的影响[J].环境科学,1997,18(4):33-35.
[21]贾振邦,林健枝,吕丰伟.沉积物充气过程对锌的影响[J].环境化学,1999,18(6):507-512.
[2]黄廷林.水体沉积物中重金属释放动力学及试验研究[J].环境科学学报,1995,15(4):440-446.
[3]魏俊峰,吴大清,彭金莲,等.污染沉积物中重金属的释放及其动力学[J].生态环境,2003,12(2):127-130.
[4]万红友,周生路,赵其国.苏南经济快速发展区土壤Ni的形态分布影响因素——以昆山市为例[J].农业环境科学学报,2010,29(10):1953-1959.
[5]陈茂林,马楫.pH变化对污泥中重金属Pb·Ni形态及迁移性的影响[J].安徽农业科学,2011,39(26):16063-16065.
[6]黄建枝,葛小鹏,王东升.水动力条件下重金属在沉积物上的吸附及其形态分布与转化[J].环境工程学报,2013,7(6):2025-2032.
[7]李鹏,曾光明,蒋敏,等.pH值对霞湾港沉积物重金属Zn、Cu释放的影响[J].环境工程学报,2010,4(11):2425-2428.
[8]沈敏,于红霞,邓西海.长江下游沉积物中重金属污染现状与特征[J].环境监测管理与技术,2006,18(5):15-18.
[9]GUPTA B,KUMAR R,RANI M.Speciation of heavy metals in water and sediments of an urban lake system[J].Journal of Environmental Science and Health,Part A,2013,48(10):1231-1242.
[10]TESSIER A,CAMPBELL P G C,BISSON M.Sequential extraction procedure for the speciation of particulate trace metals[J].Analytical Chemistry,1979,51(7):844-851.
[11]ZHONG X L,ZHOU S L,ZHU Q,et al.Fraction distribution and bioavailability of soil heavy metals in the Yangtze River Delta—A case study of Kunshan City in Jiangsu Province,China[J].Journal of Hazardous Materials,2011,198:13-21.
[12]LI X,WANG Y,LI B H,et al.Distribution and speciation of heavy metals in surface sediments from the Yangtze estuary and coastal areas[J].Environmental Earth Sciences,2013,69(5):1537-1547.
[13]黄廷林,沈晋.环境化学条件对水体沉积物中重金属释放影响的研究述评[J].西安理工大学学报,1993,9(4):285-292.
[14]李鱼,刘亮,董德明,等.城市河流淤泥中重金属释放规律的研究[J].水土保持学报,2003,17(1):125-127.
[15]王静雅,李泽琴,程温莹,等.湖相沉积物中重金属环境污染研究进展[J].地球科学进展,2004,19(S1):434-438.
[16]陈小娇,李取生,杜烨锋,等.外源重金属在珠江河口湿地土壤中的形态转化[J].生态与农村环境学报,2010,26(3):251-256.
[17]毛竹,王浩.土壤重金属形态分布特性及其影响因素[J].科技资讯,2013(8):163-164.
[18]章骅,何品晶,吕凡,等.重金属在环境中的化学形态分析研究进展[J].环境化学,2011,30(1):130-137.
[19]路永正,董德明,沈秀娥,等.曝气对河流沉积物中重金属Cu,Pb,Zn和Cd释放的影响[J].吉林大学学报:理学版,2005,43(6):185-189.
[20]文湘华,ALLEN H E.乐安江沉积物酸可挥发硫化物含量及溶解氧对重金属释放特性的影响[J].环境科学,1997,18(4):33-35.
[21]贾振邦,林健枝,吕丰伟.沉积物充气过程对锌的影响[J].环境化学,1999,18(6):507-512.