摘要
酚类化合物为一种水污染源,对人类和水体生物有毒害。因此,研究水体中沉积物对酚类化合物的吸附作用有着极其重要的意义。基于此,开展试验初步探讨pH、有机质含量和不同离子对CTAB修饰的沉积物对对甲酚的吸附影响。结果表明:对甲酚在2种CTAB修饰后的沉积物上的吸附量随着对甲酚浓度的升高逐渐减小,100mg/L时吸附量达到平衡状态;在试验范围内,这两种沉积物对于对甲酚在20h时吸附效果较好;在酸性和中性环境中,对甲酚在2种CTAB修饰后的沉积物上的吸附量几乎不变,碱性环境下吸附量较大;CO_3^(2-)存在的环境中,CTAB修饰后的沉积物对于对甲酚的吸附效果影响较小,Cl^-、HCO_3^-、SO_4^(2-)和H_2PO_4^-不利于吸附;有机质含量高的吸附剂吸附效果更好。
China's water pollution is serious,phenolic compounds as one of the sources of pollution,are toxic to humans and aquatic organisms.Therefore,it is of great significance to study the adsorption of phenolic compounds on sediments of lake water.Based on this,the experiment to study the pH,sediment organic matter content and different ion of CTAB modified to p- cresol adsorption effect was carried out.The results showed that two kinds of CTAB modified sediment adsorption amount decreased with increasing concentration of cresol,when concentration of cresd was 100 mg/L,the adsorption capacity reached an equilibrium state;In the test range,the two sediments for p- cresol in 20 h adsorption effected better,in acidic and neutral environment;p- cresol in two kinds of CTAB modified sediment adsorption capacity was almost the same,alkaline environment adsorption capacity was bigger;CO_3^(2-) in the presence of the environment,CTAB modified sediment for p- cresol adsorption effect was smaller,Cl^-、HCO_3^-、SO_4^(2-) and H_2PO_4^- were not conducive to adsorption;The adsorbent with high content of organic matter has better adsorption effect.
出处
《生物化工》
2016年第4期47-49,61,共4页
Biological Chemical Engineering
