鄱阳湖流域湖滩草地氯硝柳胺灭螺剂污染特征及风险评估

The construction of Poyang Lake ecological economic zone has risen as a national strategy, people have formed a consensus to protect the " a lake of clear water". There were serious implications for lakeshore grassland and the surrounding water environment, after a lot of niclosamide molluscicide used in Poyang Lake region. This paper use the method of field sampling and analysis, to studies the pollution characteristics of lakeshore grassland caused by using niclosamide and ecological risk assessment. Through qualitative and quantitative analysis of niclosamide and intermediate product of degradation in lakeshore grassland soil matrix and in different time and depth, the natural degradation regular pattern of niclosamide, temporal and spatial distribution of residues were researched. The effects of composition of lakeshore grassland soil, plant roots, weather factors (such as: sunshine, temperature, humidity) on the migration diffuse and natural degradation of niclosamide were studied. On the basis of the In the qualitative and quantitative analytic results of residues, according to meteorological and hydrological data of local climate, combined with the ecological system of Poyang Lakeshore grassland composition, and the use of surface water environment prediction " river -6 " model, the pollution characteristics of residual on the surrounding water environment was forecasted. Based on the hazard chemicals life cycle impact assessment theory, and the risk Quotient( HQ ) model of ecological risk assessment, the ecological risk of lakeshore grassland and the surrounding waters caused by the using of niclosamide were assessed. The objective of this study was to provide scientific basis for management and control for the molluscicide method of the using of niclosamide in the Poyang region lakeshore.

鄱阳湖生态经济区的建设已上升为国家战略，为保护这 "一湖清水"国人已形成共识。大量的氯硝柳胺灭螺剂在鄱阳湖流域湖滩使用后，可能对湖滩草地及周边水环境产生严重影响。本课题采用现场采样分析的方法，研究氯硝柳胺在鄱阳湖湖滩草地的污染特征及可能的生态风险。 通过对不同时间及深度的湖滩草地土壤中母体和降解的主要中间产物定性、定量分析，研究氯硝柳胺自然降解规律和主要残留物的时空分布。研究草地土壤组成、植物根系物、及其阳光、降雨等气候气象因素对氯硝柳胺迁移和自然降解的影响。在主要残留物定性定量分析基础上，根据当地气候气象及水文资料，结合鄱阳湖湖滩草地的生态系统组成，采用地表水环境预测"河-6"模型，预测残留对周边水环境的污染特征，根据危害化学品生命周期影响评价理论，采用危害熵（HQ）计算模型，评价残留物对湖滩草地和周边水域的生态风险。 研究目的：为鄱阳湖湖滩采用氯硝柳胺灭螺的方法的管理和控制提供科学依据

大量的氯硝柳胺灭螺剂在鄱阳湖流域湖滩使用后，可能对湖滩草地及周边水环境产生严重影响。本基金课题研究采用了现场采样分析的方法，研究氯硝柳胺在鄱阳湖湖滩草地的污染特征及可能的生态风险。.通过对不同时间及深度的湖滩草地土壤中母体和降解的主要中间产物定性、定量分析，研究了氯硝柳胺自然降解规律和主要残留物的时空分布。研究了草地土壤组成、植物根系物、及其阳光、降雨等气候气象因素对氯硝柳胺迁移和自然降解的影响。在主要残留物定性定量分析基础上，根据当地气候气象及水文资料，结合鄱阳湖湖滩草地的生态系统组成，采用地表环境预测“湖泊-5”模型，预测残留对周边水环境的污染特征，根据危害化学品生命周期影响评价理论，采用危害熵（HQ）计算模型，评价残留物对湖滩草地和周边水域的生态风险。研究结果可以为鄱阳湖湖滩采用氯硝柳胺灭螺的方法的管理和控制提供依据