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以麦壳为吸附剂,研究其对污水中阳离子表面活性剂溴化十六烷基三甲基铵(CTMAB)的吸附特性。考察了吸附剂用量、吸附时间、CTMAB初始浓度、溶液pH、吸附液盐度、温度等条件对吸附的影响。结果表明:随着麦壳用量的增加,吸附量逐渐减小;麦壳对CTMAB的吸附反应速率很快,40min即可达到吸附平衡;随着CTMAB初始浓度以及pH值的增加,吸附量均逐渐增大;随着Ca2+浓度的增大,吸附量逐渐减小;随着反应温度的升高,吸附量缓慢增大。麦壳对CTMAB的吸附符合Langmuir和Freundlich模型。
Wheat straw was used as adsorbent to study the adsorption characteristics of cationic surfactant cetyltrimethylammonium bromide (CTMAB) in wastewater. The effects of adsorbent dosage, adsorption time, initial concentration of CTMAB, pH of solution, salinity of adsorbent and temperature on adsorption were investigated. The results showed that with the increase of wheat straw dosage, the adsorption capacity decreased gradually. The adsorption rate of wheat straw to CTMAB was very fast, and the adsorption equilibrium could be reached after 40 min. The adsorption capacity of CTMAB increased with the increase of CTMAB initial concentration and pH value With the increase of Ca2 + concentration, the amount of adsorption decreased gradually; with the increase of reaction temperature, the amount of adsorption increased slowly. The adsorption of CTMAB by wheat hulls conformed to the Langmuir and Freundlich models.