工业水处理 ›› 2019, Vol. 39 ›› Issue (10): 58-62. doi: 10.11894/iwt.2018-0786

• 试验研究 • 上一篇    下一篇

鲤鱼肉骨生物炭对水中Cd2+的吸附特性研究

乔洪涛1(),乔永生1,赵保卫2,*(),彭娟1,于雄胜1   

  1. 1. 忻州师范学院化学系, 山西忻州 034000
    2. 兰州交通大学环境与市政工程学院, 甘肃兰州 730070
  • 收稿日期:2019-09-04 出版日期:2019-10-20 发布日期:2019-10-29
  • 通讯作者: 赵保卫 E-mail:469494248@qq.com;zhbw2001@sina.com
  • 作者简介:乔洪涛(1989-),博士,讲师。E-mail:469494248@qq.com
  • 基金资助:
    国家自然科学基金资助项目(21167007);国家自然科学基金资助项目(21467013);“山西省1331工程”重点学科建设计划经费资助项目(晋教财[2017]122);忻州师范学院院级科研项目(2018KY10)

Adsorptive characteristics of cadmium onto biochar derived from meat and bone meal of carp in aqueous solution

Hongtao Qiao1(),Yongsheng Qiao1,Baowei Zhao2,*(),Juan Peng1,Xiongsheng Yu1   

  1. 1. Department of Chemistry, Xinzhou Teachers University, Xinzhou 034000, China
    2. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
  • Received:2019-09-04 Online:2019-10-20 Published:2019-10-29
  • Contact: Baowei Zhao E-mail:469494248@qq.com;zhbw2001@sina.com
  • Supported by:
    国家自然科学基金资助项目(21167007);国家自然科学基金资助项目(21467013);“山西省1331工程”重点学科建设计划经费资助项目(晋教财[2017]122);忻州师范学院院级科研项目(2018KY10)

摘要:

以病死鲤鱼为原料在600℃下热解制备了鲤鱼肉骨生物炭(CMBB),探讨了CMBB对水中Cd2+的吸附特性。结果表明,CMBB对Cd2+的吸附动力学过程符合准二级动力学模型,吸附速率受内扩散机制控制;等温吸附过程符合Langmuir、Temkin和Langmuir-Freundlich等温吸附模型;该吸附为一个自发的熵增吸热过程。CMBB在较宽的pH范围(4~8)内对Cd2+具有较好的去除率(>98%);离子强度对Cd2+的去除影响不大。

关键词: 肉骨生物炭, 吸附,

Abstract:

This study investigated adsorptive characteristics of CMBB for cadmium ions(Cd2+) from aqueous solution. Crap meat and bone meal biochar(CMBB) was prepared by using sick and dead carp as raw material under pyrolysis temperatures of 600℃. The results showed that the pseudo-second-order model provided the best fitting for the adsorption kinetics of Cd2+ onto CMBB. Adsorption rate was controlled by internal diffusim mechanis. The isotherm adsorption confirmed to the Langmuir, Temkin and Langmuir-Freundlich models well. Thermodynamics analysis suggested that Cd2+ adsorption onto CMBB was a spontaneous, entropy-increasing and endothermic process. CMBB had a significant effect on the removal rate(>98%) of Cd2+ in a wide pH range(4-8), whereas the ionic strength had little effect on the removal rate of Cd2+.

Key words: meat and bone meal biochar, adsorption, cadmium

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