Effects of Biochemical Fulvic Acid on Degradation of Cyanide and Speciation of Heavy Metal during Composting
A simulated composting experiment was conducted,in which cassava dreg and dried chicken manure were used as raw materials,and a sort of biochemical fulvic acid (BFA) was added.Four composting processes were designed:T1 (compost materials +1‰ BFA),T2 (compost materials +2‰ BFA),T3 (compost materials +3‰ BFA),and CK (compost materials only),focusing on degradation of cyanide and speciation variation of heavy metal (Cu,Pb,Zn,Cr,Cd and As).Effects of these treatments were measured and the results suggested that adding of BFA,in general,could effectively reduce the cyanide content,and the heavy metal of exchangeable form got lower in content and distribution rate,which implied the decrease of ecological risk of cyanide and heavy metals in composting product.By the comprehensive comparison and analysis,the effect of adding 2‰ biochemical fulvic acid to compost materials proved the best.
biochemical fulvic acidcassava dregchicken manurecompostcyanideheavy metal speciation
NETL
NSTL
万方数据
维普
