连云港徐圩新区河湖底泥的理化特征及其氮磷污染程度评价  

Physical and chemical characteristics of river and lake sediment and evaluation of nitrogen and phosphorus pollution in Xuwei New District of Lianyungang City

作　　者：林洪军 郑小军 胡志远 王贝贝 张肖城 程铮 LIN Hongjun;ZHENG Xiaojun;HU Zhiyuan;WANG Beibei;ZHANG Xiaocheng;CHENG Zheng(Jiangsu Xianghe Agricultural Development Co.Ltd.,Lianyungang 222048,China;School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China;Suzhou Advanced Molecular Diagnostic Technology Co.Ltd.,Suzhou 215127,China)

机构地区：[1]江苏香河农业开发有限公司,江苏连云港222048 [2]江苏大学环境与安全工程学院,江苏镇江212013 [3]苏州先进分子诊断有限公司,江苏苏州215127

出　　处：《延边大学学报（自然科学版）》2023年第4期366-371,共6页Journal of Yanbian University（Natural Science Edition）

基　　金：江苏大学横向课题(HX20230220);江苏大学高级人才基金(20JDG067)。

摘　　要：为探究连云港徐圩新区内河湖底泥的环境状况,对区域内河湖底泥的pH值、硝态氮(NO-3-N)、氨氮(NH_(3)^(-)N)、总氮(TN)、总磷(TP)5个理化指标进行了测定和分析,并利用地质累积指数法(Igeo)对底泥的氮磷污染程度进行了评估.结果表明:研究区河湖底泥的pH值在7.9~8.7范围内,其NO_(3)^(-)-N、NH_(3)^(-)N、TN和TP的含量范围分别为0.32~5.03mg/kg、1.73~24.68mg/kg、0.152~0.437g/kg、0.49~1.16g/kg,其中NO-3-N、NH_(3)^(-)N和TP的变异系数相对较高;研究区内河湖底泥中的TN和TP的Igeo平均值分别为1.97和2.30,表明研究区内的河湖分别处于偏中度污染和中度污染的状态.该研究成果可为治理和保护徐圩新区内的河湖生态提供参考.In order to understand the status of sediment environment in Xuwei New District of Lianyungang City,we analyzed the five physical and chemical index characteristics of sediment of rivers and lakes,including pH value,nitrate nitrogen(NO-3-N),ammonia nitrogen(NH_(3)^(-)N),total nitrogen(TN),total phosphorus(TP),and used the geoaccumulation index(Igeo)to evaluate the pollution degree of nitrogen and phosphorus in sediment.Our result show that the pH value is in the range of 7.9-8.7,and NO-3-N,NH_(3)^(-)N,TN,TP in sediment of rivers and lakes are 0.32-5.03 mg/kg,1.73-24.68 mg/kg,0.152-0.437 g/kg,0.49-1.16 g/kg,respectively.Particularly,the coefficient of variation of NO-3-N,NH_(3)^(-)N,TP is relatively high;the Igeo average value of TN and TP are 1.97 and 2.30,respectively,indicating a near moderately polluted state and moderately polluted state in sediment of rivers and lakes.Our research can provide references for the management and protection of the ecology of rivers and lakes in the study area.

关 键 词：连云港徐圩新区 底泥 地质累积指数 pH值 硝态氮 氨氮 总氮 总磷 

分 类 号：X53[环境科学与工程—环境工程]