کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
584182 | 877885 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
p-Nitrophenol, phenol and aniline sorption by organo-clays
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: p-Nitrophenol, phenol and aniline sorption by organo-clays p-Nitrophenol, phenol and aniline sorption by organo-clays](/preview/png/584182.png)
چکیده انگلیسی
The aims of this study were to make use of organo-clays (i.e., Cloisite-10A, Cloisite-15A, Cloisite-30B and Cloisite-93A), to remove p-nitrophenol, phenol and aniline of organic pollutants. The organo-clays were characterized by X-ray diffraction (XRD). Sorption isotherm, kinetic and pH effect of p-nitrophenol, phenol and aniline sorbed by four organo-clays were evaluated. The d-spacings (0Â 0Â 1) of the XRD peak of Cloisite-10A, Cloisite-15A, Cloisite-30B and Cloisite-93A are 1.98, 2.76, 1.93 and 2.64Â nm, respectively. The d(0Â 0Â 1)-spacings of XRD indicated that these p-nitropheno, phenol and aniline could penetrate into the interlayer of clays and expand the d(0Â 0Â 1)-spacings. The linear sorption isotherm of constant partition was employed to describe the sorption isotherms of phenols sorbed by organo-clays through hydrophobic-hydrophobic chemical reactions. The parabolic diffusion and power-function of kinetic models were employed to describe properly the kinetic experiments. The rate limiting step of the p-nitrophenol sorption reactions on organo-clays were diffusion-controlled processes (i.e., 15A, 30B, 93A) and chemical-controlled process for 10A organo-clays. The pre-exponential factor of the p-nitrophenol sorbed by four organo-clays showed the trend as follows: 10AÂ >Â 30BÂ >Â 93AÂ >Â 15A. The efficiency of these organo-clays in removing phenol compounds in water treatments merit further study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 149, Issue 2, 22 October 2007, Pages 275-282
Journal: Journal of Hazardous Materials - Volume 149, Issue 2, 22 October 2007, Pages 275-282
نویسندگان
Chun Han Ko, Chihhao Fan, Po Neng Chiang, Ming Kuang Wang, Kuo Chuan Lin,