کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6972698 1453142 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimizing adsorption of crystal violet dye from water by magnetic nanocomposite using response surface modeling approach
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Optimizing adsorption of crystal violet dye from water by magnetic nanocomposite using response surface modeling approach
چکیده انگلیسی
A magnetic nanocomposite was developed and characterized. Adsorption of crystal violet (CV) dye from water was studied using the nanocomposite. A four-factor central composite design (CCD) combined with response surface modeling (RSM) was employed for maximizing CV removal from aqueous solution by the nanocomposite based on 30 different experimental data obtained in a batch study. Four independent variables, viz. temperature (10-50 °C), pH of solution (2-10), dye concentration (240-400 mg/l), and adsorbent dose (1-5 g/l) were transformed to coded values and a second-order quadratic model was built to predict the responses. The significance of independent variables and their interactions were tested by the analysis of variance (ANOVA) and t-test statistics. Adequacy of the model was tested by the correlation between experimental and predicted values of the response and enumeration of prediction errors. Optimization of the process variables for maximum adsorption of CV by nanocomposite was performed using the quadratic model. The Langmuir adsorption capacity of the adsorbent was determined as 81.70 mg/g. The model predicted maximum adsorption of 113.31 mg/g under the optimum conditions of variables (concentration 240 mg/l; temperature 50 °C; pH 8.50; dose 1 g/l), which was very close to the experimental value (111.80 mg/g) determined in batch experiment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 186, Issues 2–3, 28 February 2011, Pages 1462-1473
نویسندگان
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