Ai Van Tran
Corelex San-Ei Co., Ltd.
Title: Effect of a carbonized paper sludge on cesium concentration in contaminated paddy soil
Biography
Biography: Ai Van Tran
Abstract
Effect of a carbonized paper sludge on cesium concentration in contaminated paddy soil： Contaminated soil in a paddy field in Fukushima was treated with an industrial carbonized paper sludge (PSC) and then used to grow rice in 2011. The sum of activity concentrations of 134Cs and 137Cs in polished rice were approximately one third of the Japanese governmental safeguard value of 100 Bq.kg-1. Upon contacting with the contaminated soil, the contents of calcium, magnesium, copper, potassium, barium in PSC were decreased. Among the PSC’s impregnated with various chlorides and sulfates of the previously mentioned minerals, potassium chloride, copper sulfate, magnesium sulfate and potassium sulfate gave higher decontamination degrees compared to the original PSC. These results imply that radioactive cesium in the soil exchanges cations with these minerals.