摘要
采用动态淋洗试验分析施加不同浓度沼液后土壤下渗水的变化过程,以明确沼液灌溉对土壤下渗水的影响。结果表明,沼液浇灌后,黄壤下渗水pH呈先下降后升高的趋势,紫色土下渗水pH呈缓慢下降趋势,但二者变化均不大;2种土壤下渗水COD、TN、TP含量较沼液明显降低,且与浇灌沼液的浓度呈正相关关系;2种土壤下渗水Cu、Zn含量均在GB/T 14848-9第Ⅲ类标准以下,而Pb、Cd含量均超过GB/T14848-9第Ⅳ类标准。黄壤较紫色土对下渗水COD、TN、TP的污染风险小,而紫色土较黄壤对下渗水重金属的污染风险小。
This research analyzed the change process of leachate with applying different concentration of biogas slurry by a dynamic leaching test,and defined the effects of biogas slurry irrigation on leachate.The results showed that after irrigated biogas slurry,the leachate’s pH of yellow soil initially declined,and then rose,the leachate’s pH of purple soil decreased slowly,but they all little changed.The contents of COD,TN,TP of both soil’s leachate reduced significantly compared with biogas slurry,and they were positive correlation with the concentration of biogas slurry.The contents of leachate’s Cu and Zn of two soils were less than class Ⅲ standard of GB/T 14848-9,but the contents of Pb and Cd exceeded the 4th class of GB/T 14848-9.The pollution risk of leachate’s COD,TN,TP of yellow soil was less than that of purple soil,but the pollution risk of heavy metals was opposite.
出处
《水土保持学报》
CSCD
北大核心
2013年第3期68-71,277,共5页
Journal of Soil and Water Conservation
基金
国家"十一五"科技支撑计划项目(2010BAD03B03)
重庆市科技攻关重点项目(CSTC2009AB7027)
关键词
沼液
淋溶
黄壤
紫色土
土壤下渗水
biogas slurry
leaching
yellow soil
purple soil
soil leachate
作者简介
邓蓉（1989-），女，山西蒲县人，硕士，主要从事水污染控制研究。E—mail：dengrongend@163．com
通讯作者：陈玉成（1965-），男，湖北监利人，教授，主要从事水污染控制工程研究。E-mail：chenyucheng@swu．edu．cn
