[1]宿程远,李伟光,刘兴哲.酸-高温改性海泡石对单宁酸的吸附性能及其表面化学特性研究[J].西安建筑科技大学学报:自然科学版,2012,44(02):248-252.[doi:10.15986/j.1006-7930.2012.02.017]
　SU Cheng-yuan,LI Wei-guang,LIU Xing-zhe.Surface chemical characteristics of acid-thermal modified sepiolites and the adsorption performance of tannin[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2012,44(02):248-252.[doi:10.15986/j.1006-7930.2012.02.017]
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酸-高温改性海泡石对单宁酸的吸附性能及其表面化学特性研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
44
期数:
2012年02期
页码:
248-252
栏目:
出版日期:
2012-04-30

文章信息/Info

Title:
Surface chemical characteristics of acid-thermal modified sepiolites and the adsorption performance of tannin
文章编号:
1006-7930(2012)02-0248-05
作者:
宿程远1; 2; 李伟光1; 刘兴哲1
(1.哈尔滨工业大学市政环境学院,黑龙江 哈尔滨 150090;2.广西师范大学环境与资源学院,广西 桂林 541004)
Author(s):
SU Cheng-yuan1; 2;  LI Wei-guang1;  LIU Xing-zhe1
(1.School of Municiple and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.School of Environment and Resources, Guangxi Normal University, Guilin 541004,China)
关键词:
海泡石; 酸-高温改性; 单宁酸; 吸附
Keywords:
sepiolite;  acid-thermal modified;  tannin;  adsorption
分类号:
X 703.1
DOI:
10.15986/j.1006-7930.2012.02.017
文献标志码:
A
摘要:
以单宁酸为目标污染物,分析了溶液初始pH、吸附时间以及吸附剂投加量等因素对酸-高温改性海泡石吸附单宁酸的影响,并通过表面电荷、X射线衍射与红外光谱的测定分析,探讨了天然海泡石、酸-高温改性海泡石以及改性海泡石吸附单宁酸后的表面化学特性.结果表明,溶液初始pH=2增加到pH=10时,酸-高温改性海泡石对单宁酸的去除率由35.0%上升到74.8%,吸附量由7.0mg/g上升到15.0mg/g.随着吸附剂投加量的增加,单宁酸的去除率呈上升趋势.当吸附时间为6h时,去除率可达71.0%,吸附量为14.2mg/g,而后去除率与吸附量基本保持不变.海泡石与酸-高温改性海泡石电荷零点所对应的pHZPC分别为7.32±0.1和6.44±0.1,表明酸-高温改性增加了海泡石表面的酸度,形成了更多的表面吸附位;同时酸-高温改性提高了海泡石的纯度和吸附性能,改性海泡石吸附单宁酸后,其红外图谱显示在2 975、2 919和1 629cm-1处出现了吸收峰,表明改性海泡石对单宁酸有较好的吸附作用
Abstract:
With tannin as target pollutant, the effects of such factors as the initial concentration pH, adsorption time, and adsorbent dosage on the adsorption of acid-thermal modified sepiolite are analyzed. At the same time, the chemical properties of the natural sepiolite, acid-thermal modified sepiolite and adsorption of tannic sepiolite were investigated using surface charge, X-ray powder diffraction and infrared spectroscopy. The removal rate of tannin adsorbed increased from 35.0% to 74.8% for acid-thermal modified sepiolite as the pH increased from 2to 10.At the same time, the amount of tannin adsorbed increased from 7.0to 15.0mg/g. As the adsorbent dosage increased, so did the removal rate. When the adsorption time was 6h,the removal rate was 71.0%and the amount of tannin adsorbed was 14.2mg/g. Then the removal and adsorption capacity of tannin basically remained unchanged. The pHZPC of the natural sepiolite and acid-thermal sepiolite were 7.32±0.1 and 6.44±0.1,respectively.This suggested that acid and thermal treatment increased the surface acidity of sepiolite and the surface available sites for adsorption. The acid and thermal treatment improved the adsorption capacity and purity of sepiolite. After the acid-thermal modified sepiolite absorbed tannin, the changes in the IR absorption bands of the sample were noted at 2975, 2919, and 1629cm-1.This shows that the adsorption of tannin was well on acid-thermal modified sepiolite

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备注/Memo

备注/Memo:
收稿日期:2011-11-28 修改稿日期:2012-03-29
基金项目:国家科技支撑项目(2009BAC57B03);广西教育厅科研项目(201010LX069)
作者简介:宿程远(1981-),男,河北晋州人,讲师,博士研究生,研究方向为水及废水处理理论与技术
更新日期/Last Update: 2015-09-01