甘蔗渣接枝四乙烯五胺制备治理印染废水的新型吸附剂  

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

作　　者：何连芳[1] 陈翠锦[1] 林钻涛[1] 江晓漫[1] 蒋刚彪[1] 

机构地区：[1]华南农业大学资源环境学院,广州510640

出　　处：《生态科学》2011年第4期441-445,共5页Ecological Science

基　　金：广东省教育部产学研结合项目(2009B090300231)

摘　　要：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Cu 2+、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 sugarcanebagasse,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。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 Cu2＋ and Cr3＋. 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 organic dye eosin increased 18 times than that of SB, and adsorption capacity toward heavy metal ions （Cu2＋ and Cr3＋） was also much stronger than that of SB. The adsorption process of eosin could be better simulated by Langmuir-type adsorption isotherm. MSB had its maximum capacity toward eosin at 25℃, which reached 399.04 mg/g .The results show that the adsorption behavior of eosin by MSB is much better adapted to the Pseudo-dynamic model of the secondary adsorption. A conclusion can be drawn that MSB is a kind of efficient bioadsorbent for treatment of organic dyeing and electroplating wastewater.

关 键 词：改性甘蔗渣 吸附剂 印染废水治理 有机染料 重金属离子 

分 类 号：Q945.78[生物学—植物学]