Reduced mobile cadmium toxin in ontaminated agricultural soil by biochar from rice byproducts and perlite material

Abstract

   The purpose of this study aimed to compare the efficiency of mobile Cd toxin treatment in contaminated agricultural soils by common materials, including perlite material, and biochar from rice by-products (straw and rice husk). The experiment treatments was conducted with three mixing material ratios (0.5 -
1 - 1.5%, w/w) and mobile Cd content in soils was observed after 30 - 40 - 50 - 60 days. Experimental results showed that perlite is material with highest Cd reduction efficiency compared to others. In addition, mixing ratios of 1% and 1.5% were higher than 0.5% ratio of perlite material, and mobile Cd
toxin control (over 99% ) is optimum after 40 days. Rice husk with the mixing ratio of 1.5% reached the optimal level after 50 days. The lower efficiency was straw with 1.5% ratio with optimum control about mobile Cd after 60 days