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Clay Mineralogy and Vertical Distribution of Cadmium in a Soil Profile in a Reclaimed Paddy Field in Kyushu, Japan

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概要 We collected six soil samples from a soil profile in a reclaimed paddy field in Omuta, Kyushu, Japan and analyzed for basic chamical properties, clay mineralogy and total cadmium content. The all six ...soil samples resembled with regard to exchangeable catioin composition and clay mineralogy. The total cadmium content on the whole soil basis was 5.1 and 3.5 mg kg[-1] for 0-15 cm and 15-35 cm layers, respectively, and it was in a relatively narrow range from 1.2 to 1.8 for the underlying layers. The cadmium content on the clay basis was also highest for the surface soil with a value of 19mg kg[-1] and those for the underlying layers were fairly high with values from 9 to 12 mg kg[-1]. According to physical chamistry of adsorption, the equilibrium concentration depends primarily on the adsorption per unit amount of adsorbent, the clay content as well as total cadmium content should be determined for assessing bioavailability of cadmium and remendiationi planninng.続きを見る

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登録日 2009.04.22
更新日 2017.02.02