化工学报

• 能源和环境工程 • 上一篇    下一篇

沼渣制备生物炭吸附沼液中氨氮

郑杨清1, 郁强强1, 王海涛1, 王远鹏1, 何宁1, 沈亮1, 李清彪1,2   

  1. 1 厦门大学化学化工学院化学工程与生物工程系, 福建 厦门 361005;
    2 泉州师范学院化学与生命科学学院, 福建 泉州 362000
  • 收稿日期:2013-12-31 修回日期:2014-01-19 出版日期:2014-05-05 发布日期:2014-05-05
  • 通讯作者: 李清彪
  • 基金资助:

    国家重点基础研究发展计划项目(2013CB733505)。

Preparation of biochars from biogas residue and adsorption of ammonia-nitrogen in biogas slurry

ZHENG Yangqing1, YU Qiangqiang1, WANG Haitao1, WANG Yuanpeng1, HE Ning1, SHEN Liang1, LI Qingbiao1,2   

  1. 1 Department of Chemical and Biochemical Engineering, School of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
    2 School of Chemistry and Life Science, Quanzhou Normal University, Quanzhou 362000, Fujian, China
  • Received:2013-12-31 Revised:2014-01-19 Online:2014-05-05 Published:2014-05-05
  • Supported by:

    supported by the National Basic Research Program of China(2013CB733505).

摘要: 以生物产甲烷的副产物沼渣为原料,用5种不同的方法通过化学活化法制备生物炭,实验结果表明5种生物炭对沼液中的氨氮都有吸附效果,而氢氧化钾活化制备的生物炭(KOH-CC)对氨氮的吸附效果相对较好,吸附剂对氨氮的吸附符合准二级吸附动力学,吸附等温线表现为Langmuir型,通过拟合计算最大吸附容量能达到120 mg·g-1。对生物炭进行BET、扫描电镜及红外等表征,分析了KOH-CC生物炭吸附氨氮过程的作用机理。

关键词: 甲烷, 沼渣, 生物炭, 吸附, 氨氮, 吸附剂

Abstract: Five types of biochars were prepared through chemical activation utilizing fermentation residue from biogas plants. NaOH, KOH, H2SO4, H3PO4 and ZnCl2 were used as chemical activating agents. Biochars could absorb ammonia-nitrogen in biogas slurry. Biochar derived from KOH treatment (KOH-CC) showed better adsorption efficiency than the others. The adsorption process followed pseudo-second-order kinetics, and the adsorption isotherm could be fitted to Langmuir equation. Simulation test indicated that the maximum adsorption capacity could reach 120 mg·g-1. The properties of KOH-CC were characterized by BET, SEM, XRD and FTIR. The machanism of ammonia-nitrogen adsorption was discussed.

Key words: methane, biogas residue, biochar, adsorption, ammonia-nitrogen, sorbent

中图分类号: