摘要
实验采用过氧化氢氧化法处理低浓度含氰废水,考察了过氧化氢浓度、反应时间以及反应pH值对于总氰化物去除率的影响。结果表明:上述研究参数均存在最佳值。在本实验研究范围内,总氰化物初始浓度为3.7 mg/L,过氧化氢浓度为0.96g/L,反应pH值为9,反应时间为2.5 h的条件下,总氰化物去除率达91.2%。实验室小试对比实验表明,过氧化氢和次氯酸钠均能有效处理低浓度含氰废水,但过氧化氢氧化法的药剂成本费比次氯酸钠氧化法的药剂成本费低。
The pilot-scale experiment was meant to treat low cyanide wastewater by hydrogen peroxide oxidation. It was examined that the effects of the concentration of hydrogen peroxide,reaction time and reaction pH on total cyanide removal efficiency. The results indicate that all the parameters had an optimal value. Within the experimental range,the total cyanide removal efficiency could reach 91. 2% under the following operating conditions: Total cyanide concentration = 3. 7 mg/L,hydrogen peroxide concentration = 0. 96 g/L,pH = 9,reaction time = 2. 5 h.Through laboratory-scale experiment,both hydrogen peroxide and sodium hypochlorite can well treat low concentration cyanide wastewater. However,the chemical fee for hydrogen peroxide is lower than that for sodium hypochlorite.
出处
《环境工程》
CAS
CSCD
北大核心
2013年第S1期25-27,53,共4页
Environmental Engineering
关键词
过氧化氢
氰化物
次氯酸钠
hydrogen peroxide
cyanide
sodium hypochlorite
