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酸碱改性对生物炭吸附Cr(Ⅵ)性能的影响

赵洁 贺宇宏 张晓明 李琦 杨卫春

赵洁, 贺宇宏, 张晓明, 李琦, 杨卫春. 酸碱改性对生物炭吸附Cr(Ⅵ)性能的影响[J]. 环境工程, 2020, 38(6): 28-34. doi: 10.13205/j.hjgc.202006005
引用本文: 赵洁, 贺宇宏, 张晓明, 李琦, 杨卫春. 酸碱改性对生物炭吸附Cr(Ⅵ)性能的影响[J]. 环境工程, 2020, 38(6): 28-34. doi: 10.13205/j.hjgc.202006005
ZHAO Jie, HE Yu-hong, ZHANG Xiao-ming, LI Qi, YANG Wei-chun. EFFECT ON Cr(Ⅵ) ADSORPTION PERFORMANCE OF ACID-BASE MODIFIED BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 28-34. doi: 10.13205/j.hjgc.202006005
Citation: ZHAO Jie, HE Yu-hong, ZHANG Xiao-ming, LI Qi, YANG Wei-chun. EFFECT ON Cr(Ⅵ) ADSORPTION PERFORMANCE OF ACID-BASE MODIFIED BIOCHAR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 28-34. doi: 10.13205/j.hjgc.202006005

酸碱改性对生物炭吸附Cr(Ⅵ)性能的影响

doi: 10.13205/j.hjgc.202006005
基金项目: 

国家重点研发计划项目(2018YFC1802204)。

详细信息
    作者简介:

    赵洁(1994-),女,硕士,主要从事重金属废水及土壤的修复治理研究工作。1403831045@qq.com

    通讯作者:

    杨卫春(1982-),女,博士,教授,主要从事环境功能材料制备及水污染控制研究。yang220@csu.edu.cn

EFFECT ON Cr(Ⅵ) ADSORPTION PERFORMANCE OF ACID-BASE MODIFIED BIOCHAR

  • 摘要: 生物炭因具有原料来源广泛、表面活性官能团含量丰富、性质稳定等特点,近年来,在环保领域作为重金属处理吸附剂受到越来越多的重视。使用松木屑在碳化温度为400 ℃条件下制备生物炭(简称AB400),并使用HNO3、H3PO4、NH3·H2O、Ca(OH)2对生物炭进行改性。借助SEM、FTIR、BET、Boehm滴定法和Zeta电位测定等方法对改性前后AB400表征,并进行Cr(Ⅵ)吸附实验。改性后生物炭结构呈半穿透至穿透状圆形塌陷,存在微孔。酸性改性条件下,HNO3改性生物炭(简称AB400HNO3)、H3PO4改性生物炭(简称AB400H3PO4)中酸性官能团含量均有所升高,且生物炭pH均减小,其对应pHpzc增大,而碱改性的生物炭则反之。对于Cr(Ⅵ)的吸附,酸性改性生物炭在整体上的吸附效果优于碱性改性生物炭,其中AB400H3PO4吸附效果最佳,吸附容量从58.48 mg/g提高至101.82 mg/g。这是因为碱性改性生物炭表面为负电荷,与Cr(Ⅵ)的含氧阴离子相斥;而AB400HNO3微孔容积较小,圆形塌陷数量甚微,表面虽正电荷,但吸附性能不及AB400H3PO4
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  • 收稿日期:  2020-03-24

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