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In order to effectively solve the serious problem of 2,4-dichlorophenol's pollution to water resources, the salicylaldehyde-modified chitosan's synthesis and its property of adsorption to 2,4-dichlorophenol are studied. A comparison of the adsorption ability between the modified chitosan and the un-modified chitosan is made. The synthesis method of salicylaldehyde-modified chitosan is discussed. The structure of the modified chitosan is characterized by FT-IR. The adsorption of 2,4-dichlorophenol by the modified chitosan is investigated by the UV spectrum method. The effects of pH value, time and concentration of phenol on adsorption property are analyzed. It is shown that the modified chitosan has better adsorption property than the un-modified chitosan. The adsorption ability is improved from 26.8mg/g of the un-modified chitosan to 38.7mg/g of the modified chitosan. The modified chitosan has the best adsorption effect when the adsorption time is above 2h and pH value of the solution is 5. With the increase of the concentration of phenol, the adsorption capacity is increased near linearly. After 50 minutes, the adsorption capacity of the modified chitosan approaches almost saturation. When the mass of the modified chitosan is above 0.5g, the adsorption capacity reaches the maximum. The adsorption property fits well with the Langmuir isotherm adsorption equation. 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科技导报
| 研究论文 2010, 28(14): 101-104
水杨醛改性壳聚糖对氯酚的吸附性能
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李海虹;张文君
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Salicylaldehyde-modified Chitosan's Property of Adsorption to Chlorophenols Compounds
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出版时间: 2010-07-28
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为了更有效解决有机污染物2,4-二氯酚对水资源污染的严重问题,对水杨醛改性壳聚糖的合成和改性壳聚糖吸附2,4-二氯酚的性能进行了研究,并对比了改性壳聚糖与未改性壳聚糖的吸附能力。介绍了改性壳聚糖的合成方法,对改性壳聚糖(CTS)产物的结构用红外光谱法进行表征,并利用紫外光谱法研究其对2,4-二氯苯酚的吸附性能。考察了pH值、时间、酚浓度等因素对吸附性能的影响。结果表明,经水杨醛改性后的壳聚糖对2,4-二氯苯酚具有更良好的吸附性能;改性壳聚糖在吸附时间2h以上,溶液pH值为5时的吸附效果最好;吸附符合Langmuir吸附等温方程;吸附动力学符合Lagergren二级吸附速率方程。
Waste water with phenol is very harmful to the health of human beings. In order to effectively solve the serious problem of 2,4-dichlorophenol's pollution to water resources, the salicylaldehyde-modified chitosan's synthesis and its property of adsorption to 2,4-dichlorophenol are studied. A comparison of the adsorption ability between the modified chitosan and the un-modified chitosan is made. The synthesis method of salicylaldehyde-modified chitosan is discussed. The structure of the modified chitosan is characterized by FT-IR. The adsorption of 2,4-dichlorophenol by the modified chitosan is investigated by the UV spectrum method. The effects of pH value, time and concentration of phenol on adsorption property are analyzed. It is shown that the modified chitosan has better adsorption property than the un-modified chitosan. The adsorption ability is improved from 26.8mg/g of the un-modified chitosan to 38.7mg/g of the modified chitosan. The modified chitosan has the best adsorption effect when the adsorption time is above 2h and pH value of the solution is 5. With the increase of the concentration of phenol, the adsorption capacity is increased near linearly. After 50 minutes, the adsorption capacity of the modified chitosan approaches almost saturation. When the mass of the modified chitosan is above 0.5g, the adsorption capacity reaches the maximum. The adsorption property fits well with the Langmuir isotherm adsorption equation. The adsorption kinetics fits well with the second-order dynamic model.
modified chitosan
/
salicylaldehyde
/
adsorption
/
kinetics
李海虹;张文君.
水杨醛改性壳聚糖对氯酚的吸附性能.
科技导报,
2010
, 28
(14)
: 101
-104
.
.
Salicylaldehyde-modified Chitosan's Property of Adsorption to Chlorophenols Compounds[J].
Science & Technology Review ,
2010
, 28
(14)
: 101
-104
.
2010年第28卷第14期
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接收时间:2010-03-12
首发时间:2010-07-28
出版时间:2010-07-28
收稿日期:2010-03-12
修回日期:2010-07-02
https://castjournals.cast.org.cn/joweb/kjdb/CN/1242120340575420772
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2种不同金属材料的力学参数
科 Family 属数 Number of genus 种数 Number of species 占总种数比例 Percentage of total species (%) 属 Genus 种数 Number of species 占总种数比例 Percentage of total species (%) 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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