Reclamation Of Heavy Metal Contaminated Soil By Using Biochar As Soil Conditioner

Increasing population density and scarce funds available for environmental restoration gearing to explore and speed-up the low-cost and ecologically sustainable remedial options to restore contaminated lands so as to reduce the associated risks make the water and land resources available for agricultural production enhance food security and scale down the land tenure problems. Biochar is a carbon negative charcoal based soil amendment that can be designed to help reclaim and improve marginal soils by increasing soil water holding capacity and enhancing fertility while also generating high-value renewable energy co-products during its production. In this study the soil samples collected form a field which is assumed to be contaminated with various heavy metals esp Cd and Pb was conducted to reclaim by using biochar from difference raw material sources coconut shell peanut shell wheat straw rice husk and biogas byproduct with the same dosages. Biochar from coconut shell was used in three difference particle sizes 30-60 mesh 60-80 mesh and 80-200 mesh. The experiment was carried out in pot trial under nursery house with four replicas. Soil organic matter analysis pH cation exchange capacity of soil N P K assimilation and incorporated heavy metal concentration from both soil and plant samples were tested in order to know the effect of amended biochar. The purpose of this research is to evaluate the effectiveness of biochar from difference raw material sources to reduce levels of heavy metal in the soil through the analysis of their status and sorption behavior on biochar. The research was conducted at Guangdong Academy of Agricultural Science Guangzhou China.