洱海环湖区域土壤中氮、磷、砷和金属含量及潜在生态风险评价  

Contents of Nitrogen,Phosphorus,Arsenic and Metals in Soils around Erhai Lake and Their Potential Ecological Risk Assessment

作　　者：雷晓毅 陈凯婕 何甜 邓志新 鹿璇 隋世燕 Lei Xiaoyi;Chen Kaijie;He Tian;Deng Zhixin;Lu Xuan;Sui Shiyan(College of Public Health,Dali University,Dali,Yunnan 671000,China)

机构地区：[1]大理大学公共卫生学院,云南大理671000

出　　处：《大理大学学报》2024年第4期95-100,共6页Journal of Dali University

基　　金：云南省大学生创新创业训练计划项目(202010679005)。

摘　　要：目的:了解洱海环湖区域土壤中有关元素的含量,为土壤环境质量评价、潜在风险评估以及洱海保护和综合治理提供一定的科学依据。方法:选取洱海环湖区域不同地点的土壤样本,测定其锰(Mn)、锌(Zn)、钙(Ca)、铜(Cu)、钴(Co)、氮(N)、磷(P)、砷(As)8种元素的含量,利用地积累指数法和重金属潜在生态风险指数法,对土壤质量状况和潜在生态风险程度进行分析和评价。结果:Zn、Cu和As的平均质量含量均不超过风险筛选值;Mn、Zn、Cu、Co和As的地积累指数均小于0;土壤中N、P元素等级分别为第五等级和第四等级;多金属潜在生态风险综合指数为12.85。结论:研究区域土壤中金属的累积程度较低且受人类活动影响较小,重金属的潜在生态风险度轻微,土壤中N、P元素整体呈现养分区域不平衡现象。Objective:To understand the content of related elements in the soil around Erhai Lake,and to provide a scientific basis for soil environmental quality evaluation,potential risk assessment,protection and comprehensive management of Erhai Lake.Methods:Soil samples from different sites around Erhai Lake were selected to determine the contents of 8 elements,such as manganese(Mn),zinc(Zn),calcium(Ca),copper(Cu),cobalt(Co),nitrogen(N),phosphorus(P)and arsenic(As).The soil quality and potential ecological risk were analyzed and evaluated by geoaccumulation index and potential ecological risk index of heavy metals.Results:The average mass content of Zn,Cu and As did not exceed the risk screening value.The indexes of geoaccumulation of Mn,Zn,Cu,Co and As were less than 0;the grades of N and P in soil were the fifth and fourth grades respectively.Polymetallic potential ecological risk index was 12.85.Conclusion:The accumulation degree of metals in the soil of the study area is low and less affected by human activities,the potential ecological risk of heavy metals is slight,and the N and P elements in the soil show the imbalance of nutrient regions.

关 键 词：洱海 土壤 氮 磷 砷 重金属元素 潜在生态风险评价 

分 类 号：X833[环境科学与工程—环境工程]