蒋冬梅, 茄丽梅, 谢尚宾, 等. 糠醛交联板栗壳色素树脂对水中Cu(II)的吸附研究[J]. 西南林业大学学报(自然科学), 2020, 40(4): 144–150 . DOI: 10.11929/j.swfu.201905006
引用本文: 蒋冬梅, 茄丽梅, 谢尚宾, 等. 糠醛交联板栗壳色素树脂对水中Cu(II)的吸附研究[J]. 西南林业大学学报(自然科学), 2020, 40(4): 144–150 . DOI: 10.11929/j.swfu.201905006
Dongmei Jiang, Limei Qie, Shangbin Xie, Zengyu Yao. Cu(II) Adsorption from Water onto Resin of Chestnut Shell Pigment Cross-linked with Furfural[J]. Journal of Southwest Forestry University, 2020, 40(4): 144-150. DOI: 10.11929/j.swfu.201905006
Citation: Dongmei Jiang, Limei Qie, Shangbin Xie, Zengyu Yao. Cu(II) Adsorption from Water onto Resin of Chestnut Shell Pigment Cross-linked with Furfural[J]. Journal of Southwest Forestry University, 2020, 40(4): 144-150. DOI: 10.11929/j.swfu.201905006

糠醛交联板栗壳色素树脂对水中Cu(II)的吸附研究

Cu(II) Adsorption from Water onto Resin of Chestnut Shell Pigment Cross-linked with Furfural

  • 摘要: 采用反向悬浮法合成了糠醛交联板栗壳色素树脂,评估其对水中重金属的吸附性能。应用振荡平衡批处理法研究了初始pH、初始浓度和吸附时间对水中Cu(II)吸附的影响,应用准一级动力学、准二级动力学和粒内扩散模型拟合了吸附动力学数据,并使用Langmuir和Freundlich等温线对吸附平衡数据进行分析。结果表明:糠醛交联板栗壳色素树脂吸附Cu(II)的适宜pH值为6;吸附过程符合准二级动力学模型,以化学吸附为主导,粒内扩散并非唯一的限速步骤;等温吸附数据遵从Langmuir模型,饱和吸附量为68.03 mg/g;吸附过程为放热反应,可以自发进行,受热焓和熵共同驱动。糠醛交联板栗壳色素树脂对水中Cu(II)有很好的吸附性能,在重金属污水处理方面具有广阔的应用前景。

     

    Abstract: The resin of chestnut shell pigment cross-linked with furfural was fabricated by a reverse-suspension polymerization method, and its application for heavy-metal removal from water was assessed. The effects of initial pH, initial concentration and contact time on the adsorption were studied with batch equilibrium method. The kinetic data were fitted with the pseudo-first-order, the pseudo-second-order and the intra-particle diffusion model, and the equilibrium data were analyzed using the Langmuir and the Freundlich isotherms. It was found that the optimal pH value of Cu(II) solutions was 6 for the adsorption. The kinetic data were fitted better with the pseudo-second-order equation, suggesting the adsorption is a chemical process. The intra-particle diffusion was found to be one of the rate-limiting steps. The equilibrium data complied with the Langmuir isotherm, with a saturated adsorption capacity of 68.03 mg/g. The adsorption is a spontaneous exothermic process driven by both enthalpy and entropy. The good adsorption performance for Cu(II) from water shows a bright applying prospect of the resin in heavy-metal-loaded wastewater treatment.

     

/

返回文章
返回