碩士 / 國立成功大學 / 地球科學系碩博士班 / 94 / The redox reaction of arsenic was investigated in the Blackfoot Disease (BFD) area in the Chia-Nan Plain where twenty-five different sites of groundwater samples were collected and analyzed in this study for temperature, pH, electric conductivity, salinity, total dissolved solids, redox potential, and heavy metals (e.g., arsenic, iron, manganese, strontium, etc.) of groundwater. The heavy metals in the groundwater were analyzed by using ICP-MS, in which arsenic, iron, manganese and strontium concentrations were in the ranges of 0.015~0.796 mg/L, 0.152~4.43 mg/L, 0.025~0.901 mg/L and 0.062至6.22 mg/l respectively. The groundwater samples were filtrated and measured for their concentrations of arsenic(V) (0.0024~0.2467 mg/L) and arsenic(III) (0.0328~0.7830 mg/L) through Ion Chromatograph, in which the highest arsenic(III) concentrations occurred in Yenshui of Tainan County and the lowest ones occurred in Lucao of Chiayi County. The experimental results of present study revealed that the reduced the more toxic As(III) in the groundwater of the BFD area in the Chia-Nan Plain were much widely distributed and had higher concentrations in contrast to As(V). The correlation analysis of this study revealed that the arsenic in the groundwater of the study area was not correlated with well depth. The groundwater temperature and electric conductivity were positively correlated with salinity, but not significantly correlated with redox potential. The total dissolved solids, electrical conductivity, and salinity were negatively correlated. The total arsenic, As(V) or As(III) with pH, electrical conductivity, total dissolved solids, salinity, redox potential in groundwater were neither significantly correlated among them nor significantly correlated with iron, manganese and strontium. The some bacterial strains were isolated from these twenty-five groundwater samples in this study, they are Acinetobacter radioresistens,Bacillus benzoevorans, Bacillus circulans, Brevundimonas sp., Exiguobacterium aestuarii, Glacial ice bacterium, etc. The constructed phylogenetic relationship suggests that the bacterial strains isolated from the groundwater samples of Yenshui#2, Yenshui#4, Yenshui#1, Jiangjing#1B, Lucao#1B, Liujiao#2 belong to Genus Exiguobactrium; the strain from Beimen#2A belongs to Genus Bacillus and that from Yenshui#5A belongs to Brevundimonas sp.; those from Hsuechia, Liujiao#1, Yenshui#3 and Yichu#2A had closer evolutionary distances to Genus Acinetobacter and Glacial ice bacterium.
| Identifer | oai:union.ndltd.org:TW/094NCKU5135029 |
| Date | January 2006 |
| Creators | Ying-Wen Yang, 楊瑩文 |
| Contributors | Jiin-Shun Chan, 簡錦樹 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 93 |
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