کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
576014 | 1453066 | 2015 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Two novel multi-functional magnetic adsorbents for effective removal of hydrophilic and hydrophobic nitroaromatic compounds
ترجمه فارسی عنوان
دو جاذبه جدید مغناطیسی چند منظوره برای حذف موثر ترکیبات هیدروفیلی و هیدروفوب نیتروارآمد
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کلمات کلیدی
رزین مغناطیسی چند منظوره، ترکیبات نیترات آمونیوم، جذب، مبادله ایون،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
Two novel multi-functional magnetic resins named GMA30-1 and GMA30-2 were fabricated and investigated for the removal of 4-nitrotoluene-2-sulfonic acid (NTS) and 2-nitrotoluene (o-MNT). Strong base resin (GMA30-1) and weak base resin (GMA30-2) possess large surface area of 718Â m2/g and 559Â m2/g, and anion exchange capacity of 1.49Â mmol/g and 1.81Â mmol/g, respectively. The adsorption isotherms of o-MNT onto two resins were both well described by Langmuir equation. While the adsorption isotherms of NTS could be separated into two segments at a certain initial concentration and each segment followed different trends. At lower concentrations, the adsorption of NTS was driven by Van der Waal's force, exhibiting an exothermic process. With the increase of concentrations, the electrostatic force dominated and the enthalpy change (ÎH) turned to positive, indicating an endothermic process. In binary systems, the decrease in the uptake of NTS was slighter than that of o-MNT because of the additional anion exchange interaction. The adsorption capacity of NTS decreased as pH increased while the adsorption of o-MNT was not significantly affected by pH. Chloride ions reduced the adsorption of NTS by competitive effect. The desorption efficiency of NTS and o-MNT was close to 100% for 10 cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 294, 30 August 2015, Pages 158-167
Journal: Journal of Hazardous Materials - Volume 294, 30 August 2015, Pages 158-167
نویسندگان
Wei Wang, Yan Ma, Aimin Li, Qing Zhou, Weiwei Zhou, Jing Jin,