Study on reduction rates of nitrogen pollution in typical rivers of Taihu Basin
GUO Jia-xun1,2, PENG Jun-xiang1, ZHANG Hai-tao1, HU Wei-ping1, ZHAO Geng-mao2, LAI Xi-jun1, DENG Jian-cai1
1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; 2. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Abstract：The reduction rates of nitrogen pollution in typical rivers of Taihu Basin were studied using a self - developed in-situ device. The reduction rates of total nitrogen and ammonia nitrogen were (280.6±180.0)~(1458.8± 725.7)mg/(m3·d) and (35.2±3.7)~(343.6±88.4)mg/(m3·d), respectively, which indicated significant spatial difference (P<0.05). The reduction rate of nitrate nitrogen had no significant difference (P>0.05) among the rivers, and the rate was (44.3±7.6)~(521.2±19.2) mg/(m3·d). The N reduction rates under the microbial and non-microbial actions were 95.0~733.1mg/(m3·d) and 180.0~996.7mg/(m3·d), accounting for 12.9%~50.2% and 49.8%~87.0% of the total N reduction rate and 2.0%~13.4% and 7.4%~25.7% of the total N load to the rivers, respectively, indicating that the contribution of microbial actions to the reduction of nitrogen pollutants was low in short-term after nitrogen into the rivers. The N reduction rates were positively correlated with the TN, NO3- and SS concentrations (P<0.05), which suggested TN, NO3- and SS might be the influencing factors for N reducing.
郭加汛, 彭俊翔, 张海涛, 胡维平, 赵耕毛, 赖锡军, 邓建才. 太湖流域典型河流含氮物消减速率研究[J]. 中国环境科学, 2016, 36(10): 3026-3032.
GUO Jia-xun, PENG Jun-xiang, ZHANG Hai-tao, HU Wei-ping, ZHAO Geng-mao, LAI Xi-jun, DENG Jian-cai. Study on reduction rates of nitrogen pollution in typical rivers of Taihu Basin. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 3026-3032.
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