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1.1998-2001: Graduated from Northwest University of China with a master's degree; 2.2004-2010: Graduated from Xi 'an University of Architecture and Technology with Doctor's degree. Work Experience: 1.1991-1998: Former Tenth Research Institute of the Ministry of Posts and Telecommunications; 2.2011-2012: Visiting Scholar, Ohio State University, USA; 3. 2001-present: Served as a chemistry teacher of Xi 'an University of Architecture and Technology.
何盈盈
Associate Professor
Paper Publications
活性炭吸附腐殖酸的分段等温吸附模拟及热力学研究
Release time:2024-08-09 Hits:
Affiliation of Author(s):
化学与化工学院
Journal:
水处理技术
Key Words:
中文关键字:腐殖酸;活性炭;等温吸附;分段模拟;热力学分析,英文关键字:Humic Acid;Powder activated carbon;Isothermal adso
Abstract:
以一种商品腐殖酸为研究对象,以粉末活性炭(PAC)为吸附剂,测定了不同温度下腐殖酸在PAC上的吸附平衡,对不同浓度范围的腐殖酸进行了分段Langmuir和Freundlich吸附等温拟合,提出了不同负载条件下PAC表面的两类吸附点位分布特性。结果表明,在初始腐殖酸浓度为10~65 mol L-1的范围内,实验结果较好的符合Langmuir模型,属于均质吸附。对不同初始腐殖酸浓度的吸附实验进行分段模拟,结果显示在10~40 mol L-1的低负载条件下,吸附质首先占据少量存在的非均质高活性点位,吸附平衡更好的符合Freundlich模型;在腐殖酸浓度为30~65mol L-1的较高负载条件下,高活性点位被占据,另一类大量存在于PAC表面的均质低活性点位则被利用,吸附平衡表现为均质吸附,模拟结果更符合Langmuir模型。热力学分析结果表明,PAC对腐殖酸的吸附是自发的放热熵减过程,吸附后液相体系中的混乱度变小。
Note:
何盈盈
Co-author:
余晨,杨立
First Author:
heyingying
Indexed by:
Journal paper
Volume:
卷:40
Issue:
期:1
Page Number:
页:29
Translation or Not:
no
Date of Publication:
2014-01-01

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