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巢湖重污染汇流湾区沉积物营养盐分布与释放风险

刘 成 邵世光 范成新 周麒麟 陈 超 申秋实

刘 成, 邵世光, 范成新, 周麒麟, 陈 超, 申秋实. 巢湖重污染汇流湾区沉积物营养盐分布与释放风险[J]. 环境科学研究, 2014, 27(11): 1258-1264.
引用本文: 刘 成, 邵世光, 范成新, 周麒麟, 陈 超, 申秋实. 巢湖重污染汇流湾区沉积物营养盐分布与释放风险[J]. 环境科学研究, 2014, 27(11): 1258-1264.
LIU Cheng, SHAO Shi-guang, FAN Cheng-xin, ZHOU Qi-lin, CHEN Chao, SHEN Qiu-shi. Distribution and Release Risk of Nutrients in the Sediments of Heavily Polluted Confluence Bay of Chaohu Lake[J]. Research of Environmental Sciences, 2014, 27(11): 1258-1264.
Citation: LIU Cheng, SHAO Shi-guang, FAN Cheng-xin, ZHOU Qi-lin, CHEN Chao, SHEN Qiu-shi. Distribution and Release Risk of Nutrients in the Sediments of Heavily Polluted Confluence Bay of Chaohu Lake[J]. Research of Environmental Sciences, 2014, 27(11): 1258-1264.

巢湖重污染汇流湾区沉积物营养盐分布与释放风险

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07103-005)

Distribution and Release Risk of Nutrients in the Sediments of Heavily Polluted Confluence Bay of Chaohu Lake

  • 摘要: 南淝河、十五里河等多条入湖河道的向心型分布使巢湖西北部湖区形成汇流湖湾,了解该水域沉积物中营养盐累积分布及其释放风险,对评估污染状况具有重要意义. 于该研究湾区设置17个采样点,对沉积物营养盐含量及形态分布进行了调查分析,并使用静态释放方法对沉积物营养盐释放风险进行了研究. 结果表明:研究湾区表层沉积物中w(TN)和w(TP)分别为1 399.3~3 739.4和607.9~1 602.3 mg/kg,均远高于巢湖沉积物中w(TN)、w(TP)的平均值;w(NH4+-N)占w(TN)的5.62%~17.60%,16个采样点的w(Al-P)占w(TP)的50%以上,由此导致沉积物中NH4+-N和PO43--P释放通量较大,分别达到14.27~128.24和0.07~13.00 mg/(m2·d),并且在各河口区域释放风险相对高于湾区其他区域;氮、磷含量垂向分析显示,营养盐污染累积始于20世纪50年代(沉积物深度为24 cm),自80年代到90年代后期营养盐积累速率急速加剧. 沉积物中高含量的氮、磷营养盐及NH4+-N和PO43--P释放通量导致该研究湾区沉积物成为巢湖水体的潜在污染源,因此亟需进行以各河口区域为重点的营养盐污染整治.

     

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出版历程
  • 收稿日期:  2013-12-05
  • 修回日期:  2014-03-10
  • 刊出日期:  2014-11-25

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