| 芹菜渣对Cu2+的吸附特性和吸附机理研究 |
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| 引用本文： | 杜磊.芹菜渣对Cu2+的吸附特性和吸附机理研究[J].郑州轻工业学院学报(自然科学版),2011(5):65-69. |
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| 作者姓名： | 杜磊 |
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| 作者单位： | 运城学院生命科学系; |
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| 基金项目： | 山西省高校科技开发项目(20110021) |
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| 摘 要： | 采用静置吸附法,以芹菜渣为吸附剂,研究其对Cu2+的吸附特性与吸附机理,结果显示:芹菜渣对Cu2+的吸附率随其粒径的减小而增大;Cu2+溶液初始浓度相同时,吸附率随芹菜渣用量增加而增大,而当用量相同时,对不同浓度的Cu2+溶液吸附率在15 mg/L均出现1次极大值.正交试验得到3因素对吸附效果的影响程度顺序为pH>温度>时间,最优吸附条件是pH=6,吸附温度为30℃,吸附时间为3 h.吸附以单分子层的物理吸附为主,Freundlich吸附等温式能更好地描述芹菜渣对Cu2+的吸附热力学情况,标准状态下芹菜渣对Cu2+的吸附热为10.49 kJ/mol;吸附过程是先快速吸附,当吸附时间超过60 min时,吸附量的增加趋于平缓,吸附动力学用一级动力学模型描述更合适.
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| 关 键 词： | 芹菜渣 Cu2+ 吸附试验 吸附等温线 吸附动力曲线 |
Study on adsorption character and mechanism of Cu~(2+) by celery residue |
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| DU Lei.Study on adsorption character and mechanism of Cu~(2+) by celery residue[J].Journal of Zhengzhou Institute of Light Industry(Natural Science),2011(5):65-69. |
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| Authors: | DU Lei |
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| Affiliation: | DU Lei(Dept.of Life Sci.,Yuncheng Univ.,Yuncheng 044000,China) |
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| Abstract: | By adsorption method,adsorption character and mechanism of Cu2+ by celery residue were studied.The results showed that with the smaller size of celery residue,Cu2+ adsorption rate increases.Under the same Cu2+ initial concentration,with the addition of more celery residue,Cu2+ adsorption rate increases.Under the same addition amount of celery residue,Cu2+ adsorption rate all has once maximum value,as initial concentration is 15 mg/L.Orthogonal tests showed that the optimum adsorption conditions are the wast... |
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| Keywords: | celery residue Cu2 adsorption test adsorption isotherm dynamic adsorption curve |
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