【摘要】：采用自主研發(fā)的原位培養(yǎng)裝置,開展了太湖流域典型河流水體含氮物消減速率及其影響因素研究.結(jié)果表明,總氮和氨氮消減速率呈現(xiàn)顯著的空間差異性(P0.05),消減速率分別為(280.6±180.0)~(1458.8±725.7)mg/(m~3·d)、(35.2±3.7)~(343.6±88.4)mg/(m~3·d),但硝態(tài)氮消減速率(44.3±7.6)~(521.2±19.2)mg/(m~3·d))無顯著的空間差異性(P0.05).微生物作用下氮素消減速率為95.0~733.1mg/(m~3·d),分別占含氮物總消減速率和總負荷的12.9%~50.3%和2.0%~13.4%,非微生物作用下氮素消減速率為180.0~996.7mg/(m~3·d),占含氮物總消減速率和總負荷的49.8%~87.0%和7.4%~25.7%,說明污染物進入水體,短期內(nèi)微生物作用對含氮物消減速率的貢獻較低.氮素消減速率與TN、NO_3~-、SS均呈線性相關(guān)關(guān)系(P0.05),說明TN、NO_3~-、SS在一定程度上是氮素消減作用的影響因素.
[Abstract]:The reduction rate of nitrogen content in typical rivers of Taihu Lake Basin and its influencing factors were studied by using an in situ culture device developed by ourselves. The results showed that there was significant spatial difference between total nitrogen and ammonia nitrogen reduction rates (P0.05). The subtractive rates were (280.6 鹵180.0) ~ (1458.8 鹵725.7) mg/ (mt3 d), (35.2 鹵3.7) ~ (343.6 鹵88.4) mg/ (mt3 d), but nitrate nitrogen reduction rates (44.3 鹵7.6) ~ (521.2 鹵19.2) mg/ (MK3 d) had no significant spatial difference (P0.05). The nitrogen abatement rate under microbial action was 95.0~733.1mg/ (mt3 d), accounted for 50.3% and 2.0% of the total nitrogen abatement rate and load, respectively). The nitrogen abatement rate under non-microbial action was 180.0~996.7mg/ (mt3 d), accounted for 49.87.0% of the total nitrogen abatement rate and the total load of the nitrogen-containing substance, respectively), which indicated that the pollutants entered the water, and the nitrogen abatement rate was 7.40.75% of the total nitrogen abatement rate and load. The contribution of microbial action to the rate of nitrogen abatement is low in the short term. There was a linear correlation between the rate of nitrogen reduction and TNN _ 3s (P0.05), which indicated that TNN _ 3 / C _ (SS) was the influencing factor of nitrogen abatement to some extent.
【作者單位】： 中國科學院南京地理與湖泊研究所湖泊與環(huán)境國家重點實驗室;南京農(nóng)業(yè)大學資源與環(huán)境科學學院;
【基金】：水體污染控制與治理科技重大專項(2014ZX07101-011) 國家自然科學基金(41271213) 中國科學院重點部署項目(KZZD-EW-10)
【分類號】：X522
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本文編號：2194861