首页|海藻酸钠碳纳米管凝胶吸附含 Cu2＋废水的研究

海藻酸钠碳纳米管凝胶吸附含 Cu2＋废水的研究

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以1乙基3（3二甲基氨基丙基）碳化二亚胺（EDC ）为相偶联剂，通过海藻酸钠（SAL ）对碳纳米管（CNTS）进行修饰和改性，制备海藻酸钠碳纳米管凝胶，用于处理含Cu2＋废水．考察了pH值、吸附时间、吸附剂量等因素对C u2＋吸附性能的影响，并进一步探讨了吸附动力学及吸附等温线．结果表明，利用海藻酸钠对多壁碳纳米管进行改性，提高了分散性、比表面积和孔径，当p H值为5.8时，吸附率随着吸附时间的增长而增大，80 min内达到吸附平衡，吸附过程符合准一级和准二吸附动力学模型，吸附等温线符合 Freundlich和Langmuir方程，由Langmuir模型计算可知改性碳纳米管对Cu2＋的最大吸附量为87.68 mg/g ．
On Adsorption of Sodium Alginate-Carbon Nanotubes Gel for Cu2+-Containing Waste Water
With 1-ethyl-3 (3-dimethylamino-propyl) carbodiimide (EDC) as a coupling agent ,surface prop-erties have been improved by sodium alginate in order to preparate gel of SAL-MWCNT-COOH that was used to adsorb trace Cu2+-containing waste water .The effects of pH ,adsorption time and absorbent dos-age on adsorption of Cu2+ were investigated .The results show that the modification of multi-walled carbon nanotubes by means of SAL can increase dispersion ,specific surface area and aperture .When pH is 5 .8 and the adsorption attains equilibrium in 80min ,the adsorption kinetics are represented by pseudo first-and second-order models ,and the adsorption of Cu2+ by SAL-MWCNT-COOH met the Freundlich and Lang-muir isohterm equation .Based on the Langmuirmodel ,the maximum adsorption capacity of SAL-MWC-NT-COOH was 87 .68 mg/g .

multi-walled carbon nanotubessodiumalginatecopperionadsorption

万洪善

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连云港职业技术学院，江苏连云港222006

多壁碳纳米管 海藻酸钠 Cu2+ 吸附

2011年度高校科研成果产业化推进项目2012年连云港市农业攻关项目2013年连云港市工业攻关项目

JHB201177CN1211CG13042

2014

10.13718/j.cnki.xsxb.2014.09.007

西南师范大学学报(自然科学版)
西南大学

西南师范大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.805
ISSN：1000-5471
年,卷(期)：2014.(9)
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