期刊论文

Effect of Plant Pond and ConstructedWetland System on Irrigation Water Purification and Rice Cadmium Control

中文

灌溉排水学报

1672-3317

2019

38

10

47-54

10.13522/j.cnki.ggps.2019023

国家重点研发计划项目（2017YFD0801505）； 湖南省重点研发计划项目（2015NK3015）； 农业部、财政部专项（20160418）；

本校为第一机构

我国南方重金属超标水灌溉已成为农田生态系统重金属输入最主要来源。【目的】从源头治理农田灌溉水的重金属Cd污染。【方法】选取梭鱼草、狐尾藻、轮叶黑藻共3种湿地植物作为材料,构建了沉砂池+生态塘+表面流湿地+吸附池系统,探究了系统底泥含Cd量及有机质量的变化与3种湿地植物体内的Cd质量浓度变化趋势及富集转运系数。【结果】①该湿地系统底泥中含Cd量随水流方向呈现递减趋势,各个采样点Cd质量浓度随时间推移而增加,底泥中含Cd量变化范围为1.15~38.58 mg/kg。②底泥有机质量随水流沿程呈缓慢下降趋势,下降幅度最高为13.9 g/kg。3种湿地植物中,梭鱼草地下部含Cd量较高,最高达125.88 mg/kg,地...

Irrigation of heavy metals exceeding water in southern China has become the most important source of heavy metal input in farmland.[Objective]It has great practical to control heavy metal Cd pollution from irrigation water in southern China.[Method]In this study, three wetland plants, barracuda, Myriophyllum sp., and Hydrilla verticillata, were used to build a grit chamber + ecological pond + surface flow wetland + adsorption pool system to explore the changes of Cd content and organic matter in the sediment of the wetland systems. The trend of...