污灌对周边农田土壤砷垂直分布特征及评价研究  

The Vertical Distribution Characteristics and Evaluation on the Arsenic of Sewage Irrigation to Surrounding Farmland Soil

作　　者：赵悦彤 魏张东 ZHAO Yuetong;WEI Zhangdong(Miami College of Henan University,Kaifeng 475004,China)

机构地区：[1]河南大学迈阿密学院,河南开封475004

出　　处：《河南科技》2022年第14期115-119,共5页Henan Science and Technology

摘　　要：为探究污灌河对周边农田土壤影响的辐射距离及土壤砷垂直分布特征,以开封市东郊惠济河一带的污灌区为研究对象。沿惠济河开封东郊段自南向北选取三个样区,每个样区分别设置三个土壤样区,进行剖面分层采样,测定各土壤剖面中重金属砷的含量,并使用单因子污染指数法和内梅罗综合污染指数法对该污灌区的剖面土壤砷污染情况进行评价。结果表明,P1样区土壤表层受污染最严重,整体砷含量平均值为21.16 mg/kg,砷含量在3.77~46.20 mg/kg;P2样区由于附近存在化肥厂等,同时受污灌河及工矿企业的影响,也受到一定程度的土壤污染;而P3样区整体砷含量低于我国土壤环境背景值,污染程度较轻。In order to explore the radiation distance of the sewage irrigation river to the surrounding farmland soil and the vertical distribution characteristics of arsenic in soil, the sewage irrigation region of the Huiji River in the east suburb of Kaifeng city was considered as the research object. Along the Huiji River, three sample areas were selected from south to north and three sample regions were set respectively. Stratified sampling was carried out to determine the content of heavy metal arsenic in farmland soil. What′s more, the arsenic pollution of profile soil in this area was evaluated by using single factor pollution index method and Nemerow synthetic pollution index method. The results showed that the topsoil of P1 was seriously polluted. The average arsenic content was 21.16 mg/kg and the overall content ranges from 3.77 mg/kg to 46.20 mg/kg. Due to the existence of nearby chemical fertilizer plants and the influence of sewage irrigation rivers and industrial and mining enterprise, the P2 sample area was also contaminated to a certain extent. Additionally, the arsenic content of P3 region is lower than the background value of soil environment in China, thus the pollution degree is relatively light.

关 键 词：污灌 土壤剖面 砷 污染特征 

分 类 号：X53[环境科学与工程—环境工程]