@article{oai:sucra.repo.nii.ac.jp:00016408, author = {川本, 健 and 斎藤, 広隆 and MOLDRUP, Per and 小松, 登志子}, journal = {埼玉大学工学部紀要 第一部 論文集}, month = {}, note = {Transport of pesticides, heavy metal, radionuclide, and other strongly sorbing contaminants in soils is enhanced by colloid-facilitated transport. In order to understand colloid transport in soil, we first characterized coagulation/dispersion properties of colloidal solutions extracted from volcanic ash soil. Next, we investigated mobilization and leaching of colloidal materials from soil columns during rainfall irrigation. The coagulation/dispersion properties greatly varied with pH in colloidal solutions, causing change in particle size distributions with time. The leaching of colloids was numerically simulated using a new colloid transport model considering both equilibrium and kinetic sorption sites for colloids. HYDRUS-1D was used for the numerical simulation and estimation for transport parameters of colloids. The estimated distribution coefficient of natural colloids (which leached under application of artificial rainwater) was an order of magnitude larger than that of applied colloidal solution. The estimated detachment coefficient of natural colloids was three to four orders of magnitude greater than that of applied colloidal solution., text, application/pdf}, pages = {28--35}, title = {黒ぼく土カラムからの土壌コロイド流出解析}, volume = {40}, year = {2006}, yomi = {カワモト, ケン and サイトウ, ヒロタカ and コマツ, トシコ} }