Study on destruction of cyanide treated with oxidized decontaminants

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Liu, Xiaoyu^1 ; Wang, Lianyuan^1 ; Zhu, Haiyan^1 ; Ma, Mengmeng^1 ; Cai, Yawei^1

Institute of Chemical Defense, Beijing

102205, China^1

关键词: Active ingredients;    Cyanide ion;    Damage depths;    Decontaminants;    Degradation rate;    pH value;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012009/pdf
DOI  :  10.1088/1755-1315/81/1/012009

来源: IOP

【 摘 要 】

In this paper, hypochlorites and peroxides worked as decontaminants for destruction of cyanide ion. Main factors influencing the residual CN- concentration after decontamination were investigated. And the amount of gasificatied HCN and ClCN formed during the decontamination were measured, and their assessments on their damage were further discussed. Results indicated that degradation rate of KCN and gaseous by-products was closely related to the type of decontaminants, their concentration of active ingredients, KCN concentration, pH value and temperature etc. Generally, hypochlorites decontaminants reacted with cyanide ion more quickly than peroxides. When the amount of hypochlorite decontaminant was high above 2 times of its stoichiometric amount, the residual CN-concentration could be down to 0.5 mg/L after 5 minutes, while for peroxides, it would take much longer for complete destruction. However, the massive gasificatied ClCN produced intensely with hypochlorites decontaminant would cause relatively larger damage depth than that of HCN with peroxides.