Adsorptive behaviour of arsenic in a karst subterranean stream and principal components anal ysis of its influencing variables : A case stud y at the lihu subterranean stream , Guangxi Province , China

	Adsorptive behaviour of arsenic in a karst subterranean stream and principal components anal ysis of its influencing variables : A case stud y at the lihu subterranean stream , Guangxi Province , China
	Yang Hui; Zhang Liankai
	2014
发表期刊	Acta Carsologica
卷号	43 期号:2-3 页码:287-296
摘要	Arsenic (As) pollutants are serious threat to water ecological security and human health, especially in karst areas because of their unique hydrogeological characteristics. Physical-chemical analyses of karst water and its sediments at the Lihu subterranean stream, southwest China, were conducted by ICP-MS and XRF to elucidate the reaction mechanisms of arsenic in karst subterranean streams. The results show that inorganic arsenic comprise most of the total arsenic, while organic arsenic including monomethylated arsenic (MMA) and dimethyl arsenic (DMA) are not detected or infinitesimal. The reducing environment in the subterranean stream makes As(III) dominant and accounts for 53 % of the inorganic species. Adsorptive behaviour of arsenic occurred and the removal rates of As, As(III) and As(V) in the Lihu subterranean stream are 51 %, 36 % and 59 % respectively after a 25.6 km underground distance. To find out the main influencing factors on arsenic adsorptive process in this underground river, principal component analysis in SPSS and Minitab were applied. Seven main factors, i.e. sediment Fe (Fe-sed), sediment Al (Al-sed), sediment Ca (Ca-sed), particulate organic matter (POM), sediment Mn (Mn-sed), water Ca2+ (Ca2+) and water HCO3-(HCO3-) are extracted from thirteen indicators. The rank of those factors for total arsenic and As(III) is Ca-sed > Fe-sed > Ca2+ > POM > Mn-sed > Al-sed > HCO3-, while it is Fe-sed > Ca-sed > Ca2+ > Mn-sed > POM > Al-sed > HCO3- for As(V). Of these seven factors, Fe sed, Al sed, Ca sed, POM, Mn sed and Ca2+ are promoting factors for arsenic adsorption while HCO3- is an inhibiting factor. Calcium and bicarbonate turn out to be the main influencing factors for water arsenic adsorption in the study area, largely because the high calcium and alkaline values in karst water. This finding is an obvious distinction compared with the research findings at a non-karst area.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6007
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Yang Hui,Zhang Liankai. Adsorptive behaviour of arsenic in a karst subterranean stream and principal components anal ysis of its influencing variables : A case stud y at the lihu subterranean stream , Guangxi Province , China[J]. Acta Carsologica,2014,43(2-3):287-296.
APA	Yang Hui,&Zhang Liankai.(2014).Adsorptive behaviour of arsenic in a karst subterranean stream and principal components anal ysis of its influencing variables : A case stud y at the lihu subterranean stream , Guangxi Province , China.Acta Carsologica,43(2-3),287-296.
MLA	Yang Hui,et al."Adsorptive behaviour of arsenic in a karst subterranean stream and principal components anal ysis of its influencing variables : A case stud y at the lihu subterranean stream , Guangxi Province , China".Acta Carsologica 43.2-3(2014):287-296.