Extractability of Heavy Metals in Sediments and Farmland Soil in the To Lich and Kim Nguu River System
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概要
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The purpose of the present study was to evaluate the availability and mobility of heavy metals in sediments and farmland soils in the To Lich and Kim Nguu River system through the amount of heavy metals extracted with acids and its percentage to total metal concentration. Twelve sediment samples were collected from the To?Lich, Kim?Nguu River and 19 soil samples were colleted at two different locations in agricultural field and pappy field along the river. The results showed that the highest amount of heavy metals extracted from the sediment samples with 0.5M HCl and 0.1M HNO_3 was in the order of Zn > Cr > Cu > Pb > Ni > Cd and Cr > Zn > Ni > Cu > Pb > Cd, respectively. The average percentage of the amount of extractable metals to the total metal concentration for the agricultural soil was the highest for Ni (70%), followed by Cr (65%), Cd (50%), Zn (20%), Pb (10%) and Cu (7%), suggesting that Ni is more labile and available to plants than other elements. The average percentage for the paddy soil was the highest for Cr (75%), followed by Ni (50%), Cd (40%), Zn (30%), Pb (20%) and Cu (15%), suggesting the highest availability of Cr to plants. In general, the amount of the extracted heavy metals was similar between the agricultural and paddy soil. The amount of heavy metals extracted with 0.5M HCl was greater than that extracted with 0.1 M HNO3 for all metals except Cr.
論文 | ランダム
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- ゼオライトベータの結晶化におけるシリケートネットワークの構造変化 (第96回触媒討論会B講演予稿)
- シンポジウム 地域コミュニティの変容と神社神道の社会的役割再考 発題 新たな結と地域コミュニティ--地域福祉からの視点 (第63回[神道宗教学会]学術大会紀要号) -- (現代神道と社会参加--新たな公、新たな結をめぐって)
- シンポジウム 地域コミュニティの変容と神社神道の社会的役割再考 発題 「共助」の地域づくりと神社--互助社会論の視点から (第63回[神道宗教学会]学術大会紀要号) -- (現代神道と社会参加--新たな公、新たな結をめぐって)
- 現代神道と社会参加--新たな公、新たな結をめぐって (第63回[神道宗教学会]学術大会紀要号)