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向文英, 李盛柏, 李坤, 李宁. 柠檬酸改性竹纤维吸附剂的制备[J]. 环境工程学报, 2016, 10(10): 5542-5548. doi: 10.12030/j.cjee.201504222
引用本文: 向文英, 李盛柏, 李坤, 李宁. 柠檬酸改性竹纤维吸附剂的制备[J]. 环境工程学报, 2016, 10(10): 5542-5548. doi: 10.12030/j.cjee.201504222
shu
XIANG Wenying, LI Shengbai, LI Kun, LI Ning. Preparation of bamboo fibers adsorbent modified by citric acid[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5542-5548. doi: 10.12030/j.cjee.201504222
Citation: XIANG Wenying, LI Shengbai, LI Kun, LI Ning. Preparation of bamboo fibers adsorbent modified by citric acid[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5542-5548. doi: 10.12030/j.cjee.201504222
shu

柠檬酸改性竹纤维吸附剂的制备

  • 1.

    重庆大学三峡库区生态环境教育部重点实验室, 重庆 400045

  • 2.

    重庆大学低碳绿色建筑国际联合研究中心, 重庆 400045

  • 基金项目:

    高等学校学科创新引智计划资助（B13041）

  • 中图分类号: X703

Preparation of bamboo fibers adsorbent modified by citric acid

  • 1.

    Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China

  • 2.

    National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China

  • Fund Project:

  • 摘要: 采用预处理和柠檬酸酯化反应2个阶段的处理方法对竹纤维进行修饰改性，考察了预处理溶液浓度、预处理时间、柠檬酸用量比、催化剂用量比、热反应时间，热反应温度对改性效果的影响，并测定了改性后竹纤维材料对重金属Ni2+的吸附性能。实验结果表明，当预处理溶液浓度取5%，预处理时间控制在180 min，柠檬酸用量比取20 mmol·g-1，催化剂次磷酸钠用量比取0.4，热反应时间控制在90 min，热反应温度为120℃时，改性效果达到最佳，得到的最高羧基团含量为3.373 mmol·g-1。改性后的竹纤维材料对Ni2+的吸附容量高达9.486 mg·g-1，相比未改性的竹纤维，吸附性能上有显著提升。
    Abstract: Bamboo fiber, a highly efficient absorbing material, was modified by pretreatment and esterification with citric acid. The parameters that affect the carboxyl group content and adsorption capacity of Ni2+ ions, such as the pretreatment solution concentration, pretreatment time, catalysts/bamboo weight ratio, CA/bamboo amount ratio, reaction temperature, and reaction time were examined. The experimental results showed that the optimum modified conditions were 5% pretreating solution concentration, 180 min pretreatment time, 20 mmol·g-1 CA/bamboo amount ratio, 40% sodium hypophosphite, 90 min reaction time, and 120℃ reaction temperature. The products in the above-mentioned modified conditions showed significantly increased adsorption capacity, with the carboxyl group content and the maximum adsorption capacity being 3.373 mmol·g-1 and 9.486 mg·g-1, respectively.
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  • 收稿日期:  2015-09-13
  • 刊出日期:  2016-10-20

柠檬酸改性竹纤维吸附剂的制备

  • 1.  重庆大学三峡库区生态环境教育部重点实验室, 重庆 400045
  • 2.  重庆大学低碳绿色建筑国际联合研究中心, 重庆 400045
  • 收稿日期:  2015-09-13
基金项目:

高等学校学科创新引智计划资助（B13041）

摘要: 采用预处理和柠檬酸酯化反应2个阶段的处理方法对竹纤维进行修饰改性，考察了预处理溶液浓度、预处理时间、柠檬酸用量比、催化剂用量比、热反应时间，热反应温度对改性效果的影响，并测定了改性后竹纤维材料对重金属Ni2+的吸附性能。实验结果表明，当预处理溶液浓度取5%，预处理时间控制在180 min，柠檬酸用量比取20 mmol·g-1，催化剂次磷酸钠用量比取0.4，热反应时间控制在90 min，热反应温度为120℃时，改性效果达到最佳，得到的最高羧基团含量为3.373 mmol·g-1。改性后的竹纤维材料对Ni2+的吸附容量高达9.486 mg·g-1，相比未改性的竹纤维，吸附性能上有显著提升。

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