甘蔗渣接枝四乙烯五胺制备治理印染废水的新型吸附剂

论文通过在甘蔗渣(sugarcane bagasse,SB)中引入四乙烯五胺获得改性甘蔗渣(modified sugarcane bagasse,MSB),制备出对有机染料伊红和重金属离子Cu²⁺、Cr³⁺均有较好吸附能力的吸附剂,并研究了pH、温度、初始浓度等因素对吸附的影响.结果表明当伊红溶液pH为6时,MSB的吸附量比SB提高了18倍,对金属Cu²⁺ 、Cr³⁺的吸附量也大大高于SB.染料伊红的吸附过程可以用Langmuir 型吸附等温线较好地模拟,由方程可得25℃下伊红的最大吸附量为399.04 mg·g^-1,MSB对伊红的吸附行为符合伪二级吸附动力学模型.实验结果显示改性甘蔗渣(modified sugarcane bagasse,MSB)是一种吸附性能优异的吸附剂,用于处理印染废水与制革废水有较好的应用前景.

Preparation and applications of an excellent bioabsorbent by tetraethylenepentamine modified sugarcane bagasse for treatment of printing and dyeing wastewater

In this study,sugarcane bagasse(SB) which was modified by tetraethylenepentamine(TEPA) to obtain its modified derivatives(MSB),was employed as novel bioadsorbent to deal with printing and dyeing wastewater.MSB had excellent absorbability toward organic dye eosin and heavy metal ions Cu~(2+) and Cr~(3+).The factors affecting adsorption efficiency,such as pH, temperature and concentration,were investigated.The results showed that when the pH value of solution was six,the adsorption amount of MSB toward organi...