甲醛改性脐橙皮对重金属Pb(Ⅱ)的吸附

食品科学 ›› 2012, Vol. 33 ›› Issue (19): 57-61.

甲醛改性脐橙皮对重金属Pb(Ⅱ)的吸附

赵华1,2,3，陈爱华2,4，张耀海2,4，焦必宁1,2,4,*

1. 西南大学食品科学学院 2. 中国农业科学院柑桔研究所 3. 遵义市产品质量检验检测院 4. 国家柑橘工程技术中心

收稿日期:2011-07-22 修回日期:2012-08-02 出版日期:2012-10-15 发布日期:2012-09-17
通讯作者: 赵华 E-mail:yuhaokang@163.com
基金资助:
十一五”国家科技支撑计划项目资助;西南大学基本科研业务费专项资金项目

Adsorption of Pb(Ⅱ) by Formaldehyde Treated Naval Orange Peel

Received:2011-07-22 Revised:2012-08-02 Online:2012-10-15 Published:2012-09-17

摘要/Abstract

摘要： 以生物废料脐橙皮为原料，在一定的条件下，与甲醛反应，制取生物吸附剂，考察Pb(Ⅱ)初始质量浓度、吸附时间、溶液pH值对生物吸附剂吸附性能的影响。结果表明：在常温条件下，向15mL、pH 5.0、质量浓度为150mg/L的Pb(Ⅱ)溶液中加入25mg改性脐橙皮，恒温振荡2h，改性脐橙皮吸附剂对溶液中Pb(Ⅱ)的去除率达99.85%。改性脐橙皮吸附剂对Pb(Ⅱ)的吸附在2h左右达到平衡且符合二级动力学方程，生物吸附作用遵循Langmuir等温吸附方程，改性脐橙皮吸附剂的最大吸附容量达到185.19mg/g，最适pH值为4.0～5.5。

关键词: 脐橙皮, 甲醛改性, Pb(Ⅱ)溶液, 生物吸附

Abstract: Under controlled conditions, a bio-adsorbent was prepared by reacting naval orange peel with formaldehyde. The effects of initial Pb(Ⅱ) concentration, adsorption time and solution pH on the adsorption efficiency of the bio-adsorbent for Pb(Ⅱ) were investigated. The results indicated that adding 25 mg of formaldehyde treated naval orange peel to 15 mL of 150 mg/L Pb(Ⅱ) solution at pH 5.0 and then shaking the mixture for 2 h at constant ambient temperature resulted in a Pb(Ⅱ) removal rate of 99.85%. The adsorption of Pb(Ⅱ) by the bio-adsorbent reached equilibrium at approximately 2 h and obeyed second-order kinetics. The biosorption process followed Langmuir isotherm equation. The maximum adsorption capacity of the modified naval orange peel was 185.19 mg/g, and the optimum adsorption pH was 4.0—5.5.

Key words: naval peel, formaldehyde modification, Pb(Ⅱ) solution, biosorption

中图分类号:

X703
X712

赵?华1,2,3，陈爱华2,4，张耀海2,4，焦必宁1,2,4,*. 甲醛改性脐橙皮对重金属Pb(Ⅱ)的吸附[J]. 食品科学, 2012, 33(19): 57-61.

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