Chemical characteristics of rainwater in karst rural areas,Guizhou Province, Southwest China  

作　　者：Pin Lü Guilin Han Qixin Wu 

机构地区：[1]School of Water Resources and Environment, China University of Geosciences (Beijing) [2]Key Laboratory of Karst Environment and Geohazard,Ministry of Land and Resources, Guizhou University

出　　处：《Acta Geochimica》2017年第3期572-576,共5页地球化学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41325010;41661144029);National Key Basic Research Program of China(Grant No.2013CB956703)

摘　　要：The chemical composition of rainwater has been studied in a karst rural area from September 2012 to August 2013 in Guizhou Province,Southwest China.The results indicated that the VWM value of p H was 5.4,varied from 4.6 to 6.9.Ca^(2+)and NH_4^+were the major cations,and SO_4^(2-)was the dominant anion.Neutralization factors show that the acid was mainly neutralized by Ca^(2+),NH_4^+and Mg^(2+).Investigations of correlation coefficients and enrichment factors revealed that Ca^(2+)and Mg^(2+)were mainly crust origins,and NH_4^+was from agriculture and livestock manure.SO_4^(2-)and NO_3^-were mainly from anthropogenic sources.The chemical composition of rainwater has been studied in a karst rural area from September 2012 to August 2013 in Guizhou Province,Southwest China.The results indicated that the VWM value of p H was 5.4,varied from 4.6 to 6.9.Ca^2＋ and NH4^＋ were the major cations,and SO4^2-was the dominant anion.Neutralization factors show that the acid was mainly neutralized by Ca^2＋ ,NH4^＋ and Mg^2＋.Investigations of correlation coefficients and enrichment factors revealed that Ca^2＋ and Mg^2＋ were mainly crust origins,and NH4^＋ was from agriculture and livestock manure.SO4^2- and NO3^-were mainly from anthropogenic sources.

关 键 词：Chemical composition RAINWATER Karst rural area Southwest China 

分 类 号：P426.612[天文地球—大气科学及气象学] X51[环境科学与工程—环境工程]