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Publication
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| Research Title |
Arsenic Accumulation in Natural Wetland Located nearby Gold Mine Area |
| Date of Distribution |
3 May 2013 |
| Conference |
| Title of the Conference |
2013 International Conference on Environmetal Quality Concern, Contral and Conservation |
| Organiser |
National Kaohsong Marine University |
| Conference Place |
National Kaohsong Marine University |
| Province/State |
Kaohsong, Taiwan |
| Conference Date |
3 May 2013 |
| To |
4 May 2013 |
| Proceeding Paper |
| Volume |
- |
| Issue |
- |
| Page |
42-43 |
| Editors/edition/publisher |
- |
| Abstract |
Gold mining is one of the potential sources of arsenic distribution into the environment. In the extraction process of gold, arsenic which is the composition of Arsenopyrite is separated and diffused into soil, water, sediment, and further absorbed to plants. Gold mining at Wangsaphung district, Loei province, Thailand (the study gold mine) has come across with the problem of arsenic contamination in the environmental medium. Recently, there was a research carried out in 2010 on arsenic dispersion in soil, water and sediment around the studied gold mine. Based on the preliminary study, it was indicated that arsenic would rather exist in soil than water (Weerasiri et al. 2012). Noting in Weerasiri study, it was found that arsenic level was decreased after passing through the plants grown naturally in the stream. Phytoremediation would possibly taken place in the stream. The previous study has encouraged the further study of arsenic containment in natural wetland.
The main purpose of this research is to study the diffused arsenic pollution being naturally treated by natural wetland. To accomplish the main purpose, the study of arsenic accumulation in water, sediment and plant in the natural wetland located down-south nearby the gold mine site. Six sampling stations positioned along the distance of 1.5 km of natural wetland (Figure 1). Water, sediment and plant were collected to determine arsenic content both in dry season (February 2012) and rainy season (July 2012). Samples were collected and determined for arsenic content using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) method.
The preliminary study results indicated as followings. 1. Arsenic contents in water at sampling stations 1-5 in both rainy and dry seasons (1.304-0.029 mg/l) exceeded the Standard of 0.01 mg/l, while sampling station 6 of both rainy and dry seasons ( 0.002-0.003 mg/l) did not exceed the Standard. Arsenic content in rainy season was higher than the dry season. Arsenic content was decreased along the stream flow (Figure 2). 2. Arsenic content in sediment mostly exceeded the Standard of 3.9 mg/kg both rainy and dry seasons (27.415-4.375 mg/kg) except sampling stations 5 and 6 in rainy season did not exceed the standard. Arsenic content in sediment more accumulated in dry season than rainy season (Figure 3). 3. Plants that grow well in natural wetland are Colocasia esculenta(L.) Schott war.(Araceae), Diplazium esculentum (Retz.) Swartz.), and Lasia spinosa (L.) Thwaites. Arsenic accumulated in rootlet and rhizome of Colacasia sp. higher than other plants which was 12.587-0.509 mg/kg, 10.212-1.276 mg/kg, and 6.450-0.984 mg/kg respectively. Mostly the arsenic content in plant did not exceed the Standard of 2.0 mg/kg. Accumulation in plant in dry season was higher than in rainy season (Figure 4).
In conclusion, the indigenous plants grown in wetland could contain arsenic at somewhat level, implying that phytoremediation taken place in natural wetland. This could lead to arsenic treatment design using wetland existed in the contaminated area. |
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
true |
| Award Title |
Best Presentation Award |
| Type of award |
รางวัลด้านวิชาการ วิชาชีพ |
| Organiser |
International Conference on Environmetal Quality Concern, Contral and Conservation |
| Date of awarding |
3 พฤษภาคม 2556 |
| Attach file |
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| Citation |
0
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Journal Publication
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