化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (2) : 259-263.

开发与应用

改性甘蔗渣吸附剂的制备及其对直接桃红12B的吸附性能研究

赵丹华, 观丙林, 陈宗坚, 何伟发, 吕守庭, 叶志锋, 王泽冰, 谭梁容

作者信息 +

Preparation of modified bagasse and adsorption of direct pink 12B

Zhao Danhua, Guan Binglin, Chen Zongjian, He Weifa, Lv Shouting, Ye Zhifeng, Wang Zebing, Tan Liangrong

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文章历史 +

Received
2016-11-07
Issue Date	Revised Date
2018-03-13	2016-11-07

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摘要

以农业废弃物甘蔗渣为原料,用氯化钙进行改性,研究了改性甘蔗渣(MB)对染料直接桃红12B(DP12B)吸附过程的动力学、热力学、水体pH、温度、作用时间及离子强度等的影响。结果表明,当MB投加量为2g/L,DP12B的初始浓度为180mg/L,pH为中性,温度为30℃,离子强度小于0.10mol/L时,DP12B的去除率达到86%以上。MB对DP12B等温吸附符合BET吸附等温线方程,属于典型的多分子层吸附类型,适合在较高浓度阴离子染料的条件下吸附。吸附过程符合二级吸附动力学方程(R²>0.99),吸附本质上以化学吸附为主。吸附热力学参数ΔG<0,吸附是易于自发的过程。MB是一种吸附性能优异的吸附剂,用于处理染料废水有较好的应用前景。

Abstract

Bagasse was modified by CaCl₂ to obtain a new biosorbent of direct pink 12B (DP12B).The factors affecting adsorption efficiency,such as pH,temperature,ionic strength and absorption time were investigated.The results showed that the absorption rate of D12B was above 86% in solution when pH of 6.5,modified bagasse (MB) dosage of 2g/L,contact time of 0.5h,temperature of 30℃ and initial neutral red concentration of 180mg/L.Equilibrium was well described by BET isotherms and kinetics was found to fit pseudo-second order type adsorption (R²>0.99).The results indicated that the adsorption was may be mutilayer and chemical in nature.Moreover,thermodynamic constant values (ΔG<0) demonstrated that the adsorption reaction of DP12B onto MB was feasible and spontaneous under the examined conditions.A conclusion can be drawn that MB waste biosorbent was a kind of efficient biosorbent for treatment of dye wastewater.

关键词

甘蔗渣 / 吸附 / 染料

Key words

bagasse / adsorption / dye

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改性甘蔗渣吸附剂的制备及其对直接桃红12B的吸附性能研究[J]. 化工新型材料, 2018, 46(2): 259-263 DOI:

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