焦点提醒：中国给水排水第十四届污泥年夜会约请陈述专家——陈述标题问题：北方纳污湖堆积物氮素释放纪律影响身分的研究 陈述人： 中国昆仑项目无限公司 吉林分公司 苏俊涛 [1]苏俊涛,徐艺铭,孙爱丽,等.北方纳污湖堆积物氮素释放纪律影响身分的研究[J].中国给水排水,2023,39(11):62-68.　SUJun-tao,XUYi-ming,SUNAi-li,et al.Influencing Factors of Nitrogen Release from Sediments of Polluted Lake in the North[J].China Water & Wastewater,2023,39(11):62-68.点击复制

北方纳污湖堆积物氮素释放纪律影响身分的研究中国给水排水[ISSN:1000-4062/CN:12-1073/TU]卷:第39卷期数:2023年第11期页码:62-68栏目:出书日期:2023-06-01

Title:

Influencing Factors of Nitrogen Release from Sediments of Polluted Lake in the North

作者:

苏俊涛^{1， 徐艺铭2， 孙爱丽1， 石家萱2， 董禹含2， 杨基先2}

（1.中国昆仑项目无限公司 吉林分公司，吉林 吉林 132002；2.哈尔滨工业年夜学 情况学院，黑龙江 哈尔滨 150090）

Author(s):

SU　Jun-tao^{1， XU　Yi-ming2， SUN　Ai-li1， SHI　Jia-xuan2， DONG　Yu-han2， YANG　Ji-xian2}

（1. Jilin Branch， China Kunlun Contracting & Engineering Corporation， Jilin 132002， China； 2. School of Environment，Harbin Institute of Technology，Harbin 150090， China）

要害词:

堆积物氮素释放;氮素迁徙转化;响应面法;情况因子

Keywords:

nitrogen release from sediment;nitrogen migration and transformation;response surface method;environmenta����APPl factor

摘要:

为探讨北方湖泊堆积物氮素释放纪律，猜测内源氮素释放风险，基在现实湖内水体目标探讨温度、pH和消融氧与上覆水中氮素的相干性。采取响应面法考查分歧情况因子之间交互感化对总氮释放速度的影响，经由过程建立多项式回归模子估算堆积物总氮年均释放量，并猜测最晦气氮素释放的因子程度。成果注解：温度、pH、消融氧与水体中氮素浓度显著相干，此中pH、消融氧对氮素释放速度的影响加倍较着，消融氧和pH的交互感化和消融氧和温度的交互感化对总氮释放速度的影响显著。经由过程响应面拟合模子计较得出纳污湖堆积物的总氮年平均释放量为0.35 t；最晦气在堆积物氮素释放的情况前提为4 ℃、消融氧为5 mg/L、pH为9，此时猜测氮素平均释放速度为33.565 mg/（m^{2·d），与实测值误差小在5%，申明模子可托度较高。节制水体pH、消融氧是限制堆积物氮素释放的无力手段。}

Abstract:

To explore the rule of nitrogen release from sediments in lakes in northern China and predict the risk of endogenous nitrogen release, the correlation between three factors (temperature, pH and dissolved oxygen) and nitrogen in overlying water was explored based on actual water indicators of the lake. The response surface method was used to investigate the effects of interaction between different environmental factors on the total nitrogen release rate. Multiple regressions were constructed to estimate the total annual nitrogen release from sediments and predict the most unfavorable nitrogen release factor levels. Temperature, pH and dissolved oxygen were significantly correlated with the nitrogen concentration in water, among which the pH and dissolved oxygen had more significant effects on nitrogen release rate. The interaction between dissolved oxygen and pH as well as the interaction between dissolved oxygen and temperature had a significant effect on the total nitrogen release rate. The average total annual nitrogen release from sediments in the polluted lake was 0.35 t calculated by the response surface fitting model. The most unfavorable environmental conditions for nitrogen release from the sediments were temperature of 4 ℃, dissolved oxygen of 5 mg/L and pH of 9. In this case, the predicted average nitrogen release rate was 33.565 mg/(m^{2·d), and the error of the measured value was less than 5%, indicating that the model had a high reliability. Controlling water pH and dissolved oxygen was a powerful means to limit nitrogen release from sediments.}

更新日期/Last Update:2023-06-01sujuntao0110@126.com

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