[1]邵云,高士祥,伏彩中,等.羟丙基环糊精促进2-硝基联苯在土壤中的解吸动力学[J].东南大学学报(自然科学版),2006,36(6):976-980.[doi:10.3969/j.issn.1001-0505.2006.06.021]
 Shao Yun,Gao Shixiang,Fu Caizhong,et al.Kinetic studies on desorption of 2-Nitrobiphenyl in soil stimulated by hydroxypropyl cyclodextrins[J].Journal of Southeast University (Natural Science Edition),2006,36(6):976-980.[doi:10.3969/j.issn.1001-0505.2006.06.021]
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羟丙基环糊精促进2-硝基联苯在土壤中的解吸动力学()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第6期
页码:
976-980
栏目:
环境科学与工程
出版日期:
2006-11-20

文章信息/Info

Title:
Kinetic studies on desorption of 2-Nitrobiphenyl in soil stimulated by hydroxypropyl cyclodextrins
作者:
邵云1 高士祥2 伏彩中2 王灿2 王连生2
1 东南大学能源与环境学院, 南京 210096; 2 南京大学环境学院, 南京 210093
Author(s):
Shao Yun1 Gao Shixiang2 Fu Caizhong2 Wang Can2 Wang Liansheng2
1 School of Energy and Environment, Southeast University, Nanjing 210096, China
2 School of Environment, Nanjing University, Nanjing 210093, China
关键词:
环糊精 解吸 土壤 2-硝基联苯
Keywords:
cyclodextrin desorption soil 2-Nitrobiphenyl
分类号:
X131
DOI:
10.3969/j.issn.1001-0505.2006.06.021
摘要:
研究了添加羟丙基-β-环糊精(HP-β-CD)和羟丙基-γ-环糊精(HP-γ-CD)对土壤中的2-硝基联苯在1 h内的解吸动力学的影响.随着环糊精添加质量浓度的增加,2-硝基联苯的最大质量浓度和解吸速率均比对照显著增加.2-硝基联苯的水相质量浓度C与时间t之间符合曲线方程:C=C’max(max1-e-kt),其中,C’maxmax是最大解吸质量浓度,解吸速率常数k=0.159 1 min-1.根据由溶解度曲线计算的环糊精对2-硝基联苯的包合平衡常数Ks以及2-硝基联苯在土壤中的吸附平衡方程,推导了2-硝基联苯的最大解吸浓度的估算式,当HP-β-CD与土壤中初始吸附的2-硝基联苯的摩尔比大于等于3.09时(对于HP-γ-CD,摩尔比须大于等于10.47),估算值与实测值很接近,此式可用来估算使2-硝基联苯达到最佳解吸率所需的环糊精的最小用量.
Abstract:
The influence of two hydroxypropyl cyclodextrins(HP-β-CD and HP-γ-CD)on the desorption kinetics of 2-Nitrobiphenyl in soil in an hour was studied. As the mass concentration of HP-β-CD or HP-γ-CD is raised, both the maximum mass concentration and the desorption rate of 2-nitrobiphenyl increase clearly in contrast to the control. The relationship between the aqueous mass concentration C of 2-Nitrobiphenyl and the time t accords with the equation C=C’maxmax(1-e-kt),in which C’maxmax is the maximum mass concentration of 2-Nitrobiphenyl dissolved in solution, and the constant k equals 0.1591 min-1. According to the equilibrium constant Ks of cyclodextrin incorporating 2-Nitrobiphenyl which is calculated from the solubility curves, and the equilibrium equation describing 2-Nitrobiphenyl adsorbed by soil, an equation is established to estimate the maximum concentration of 2-Nitrobiphenyl in solution. When the molar ratio between HP-β-CD and 2-Nitrobiphenyl originally adsorbed by soil is more than(or equal to)3.09, the estimated value about the maximum concentration of 2-Nitrobiphenyl is very close to the observed one. For HP-γ-CD, the molar ratio should be more than(or equal to)10.47. The least dosage of cyclodextrins could be calculated from this estimate equation for maximal desorption of 2-Nitrobiphenyl.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(20077013)、教育部博士点青年基金资助项目(2000028423).
作者简介: 邵云(1975—),女,博士,讲师,shaoyun@seu.edu.cn.
更新日期/Last Update: 2006-11-20