| 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 | |
| Source Publication | Acta Carsologica
 |
| Volume | 43Issue:2-3Pages:287-296 |
| Abstract | 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. |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/6007 |
| Collection | 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 |
| Recommended Citation 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. |
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