水西沉积物对苯酚的吸附特性研究

Study on Absorption Characteristics of PHenol by Sediments from Shuixi Lake

解水西湖沉积物的环境化学意义及其在水体自净中的作用。以水西湖沉积物为研究对象,探讨其对苯酚的吸附特性,并系统考察了pH值、温度、振荡时间等因素对其吸附特性的影响。结果表明,当pH值为2.25、反应温度为26.1℃、吸附时间为4 h、沉积物投加量为1.0 g、苯酚溶液初始浓度为160 mg/L时,苯酚的去除率高达18.34%,平衡吸附量为1.1 mg/g。苯酚在水西湖沉积物上的吸附行为可以较好的用Freundlish型吸附等温式来描述。强酸性(pH<6.0)条件下,水西湖沉积物对苯酚具有较大的吸附容量和吸附强度。

The environment and chemistry meaning of sediments from Shuixi Lake and their function in water self -purification were studied.With the sediments from Shuixi Lake as the studied objects , their absorption characteristics on phenol was explored and the effects of pH value , temperature , the oscillation time and other factors on their absorption characteristics were investigated.The results indicated that the phenol removal rate reached to 18.34% and the equilibrium uptake was 1.1 mg/g, when pH=2.25, T=299.25 K, t=4 h, d（the optimum dose）=1.0 g/50 mL, andρP=160 mg/L.The sorption behavior of phenol on the tidal flat sediments of Shuixi Lake can be well described by Freundlich adsorption isotherm equations.In strongly acidic condition （ pH〈6.0 ） , the sediments from Shuixi Lake had bigger adsorption capacity and adsorption intensity on phenol.