粉末活性炭对水中呋喃丹的吸附性能研究

Adsorption of furadan in water by powdered activated carbon

考察了粉末活性炭吸附去除水中呋喃丹的可行性,并采用Freundlich公式拟合去离子水和自来水条件下的吸附等温方程。结果表明,采用粉末活性炭可有效去除水中的呋喃丹,在去离子水条件下,呋喃丹初始质量浓度为0.035 mg/L,投炭量为20 mg/L,吸附时间为120 min时,呋喃丹的去除率大于98%。根据吸附等温方程计算得出,以呋喃丹的标准限值(0.007 mg/L)作为平衡浓度,去离子水及自来水条件下最大投炭量(80 mg/L)可应对的呋喃丹的最高质量浓度分别为0.728和0.322 mg/L。

The feasibility of furadan removal in water by powdered activated carbon （PAC） was investigated, and adsorption isotherm equations were fitted by Freundlich formula in deionized water and tap water. The results indicated that furadan could be effectively removed by PAC, and the removal rate could be greater than 98 % when the initial concentration of furadan was 0. 035 mg/L, PAC dosage was 20 mg/L and adsorption time was 120 min. According to the calculation of adsorption isotherm equation, the maximum PAC dosage（ 80 mg/L）in deionized water and tap water could deal with the maximum furadan concentration of 0. 728 and 0. 322 mg/L respectively taking the standard limited value of furadan（0.007 mg/L） as equilibrium concentration.