Effects of chemical properties on heavy metal contents of volcanic ash soils in different particle size fractions
(0) A size-fractionation method by using a continuous- flow ultra-centrifugation (CFUC) was applied to a particle separation of two volcanic ash soils. Various heavy-metal contents in the separated soil fractions gradually increased with the reduction of the particle size, and in the finest fraction (<0. 05 μm) dominantly increased. The upward trend of the heavy metal contents in the fractions closely agreed with that of non-crystalline Fe content, while no relationship was observed in other properties such as their specific surfaces, total carbon contents and clay mineral composition. These data indicate that non-crystalline Fe is a primary controlling factor to determine heavy-metal distribution in different-sized soil particles.
different-sized soil fraction heavy metal non-crystalline Fe volcanic ash soil
M. Inada T. Makino Y. Adachi
Graduate school of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8577, Japan Soil Environment Division, National Institute for Agro-Environmental Science (NIAES), Tsukuba, 305-8
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
613-614
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）