化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2645-2652.DOI: 10.16085/j.issn.1000-6613.2016-2062

• 资源与环境化工 • 上一篇    下一篇

挥发性有机物的膜回收特性及膜力学性能变化

花莉, 郭培, 王宇彤, 王天培, 马宏瑞, 石岩   

  1. 陕西科技大学环境科学与工程学院, 陕西 西安 710021
  • 收稿日期:2016-11-10 修回日期:2017-01-19 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: 花莉(1978-),副教授,博士。
  • 作者简介:花莉(1978-),副教授,博士。E-mail:tuliphua@126.com。
  • 基金资助:
    陕西省科技统筹创新项目(2013KTCL14)及陕西省自然科学基础研究计划项目(2015JM4127)。

Studies on extraction characteristics of volatile organic compounds and mechanical properties change with methyl silicone rubber membrane

HUA Li, GUO Pei, WANG Yutong, WANG Tianpei, MA Hongrui, SHI Yan   

  1. College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China
  • Received:2016-11-10 Revised:2017-01-19 Online:2017-07-05 Published:2017-07-05

摘要: 物质所表现出的宏观特性与其结构之间存在着一定的联系,本文主要结合有机物结构参数研究了甲基硅橡胶膜对三大类有机物(苯胺类、苯酚类、低分子有机酸类)的萃取回收特性,对有机物的回收结果进行拟合分析;同时研究了甲基硅橡胶膜萃取有机物过程中膜的力学性能变化,结合膜萃取技术应用的环境主要选取了酸度、盐度、温度3个因素进行膜力学性能变化研究。结果表明:在选取的结构参数中,影响膜回收挥发性有机物的结构参数主要包括有机物的辛醇/水分配系数和分子极化率;膜外溶液的酸度变化对甲基硅橡胶膜硬度的影响比较显著,其次是膜管内盐离子浓度,温度对硅橡胶硬度变化的影响最小;硅橡胶膜的弹性性质很稳定,几乎不变;溶液酸度对甲基硅橡胶膜的Na+通透性变化有显著影响,而在膜管内循环流动的无机盐溶液浓度和运行温度都对Na+通透性的大小无显著影响。总体来说,溶液酸度对甲基硅橡胶膜的影响高于温度和溶液盐度,甲基硅橡胶膜在老化40天后仍满足膜的力学性能要求,保持较高的Na+截留率,具有萃取膜高效分离、使用寿命长、更换频率低的优点。

关键词: 挥发性有机物, 膜, 萃取, 回收, 力学性能

Abstract: Macroscopic property of materials has connection with its microstructure.Three kinds of organic matters,which commonly found in high salinity wastewater,and ten kinds of structural parameters were selected to analyze the relationship between structural parameters and the extraction efficiency of these organic matters in the methyl silicone rubber membrane.Mechanical propertiy change of methyl silicone rubber membrane under the factors was researched as well as.Results showed that octanol-water partition coefficient and molecular polarizability of organic matter were the main factors in the methyl silicon rubber membrane.Research on mechanical properties change of methyl silicone rubber membrane suggested that the influence of acidity was greater than temperature and salinity.The mechanical behavior and retention extent of Na+ still could meet the requirements of membrane after 40 days.The methyl silicone rubber membrane has advantages of long life and low replacement frequency.

Key words: volatile organic compounds, membrane, extraction, recovery, mechanical properties

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