عنوان مقاله
ظرفیت جذب و کارایی حذف یون های فلزات سنگین توسط کربنهای فعال خیزران Ma و Moso
فهرست مطالب
چکیده
مقدمه
مواد و روش ها
نتایج و بحث
نتیجه گیری
بخشی از مقاله
ظرفیت جذب و کارایی حذف یون های سنگین فلزی
محلول های استاندارد نیترات سرب ([Pb(NO3)2])، نیترات مس ([Cu(NO3)2])، نرترات کرومیوم ([Cr(NO3)3]) و نیترات کادمیوم ([Cd(NO3)2]) در آب مقطر در غلظت های 10 پی پی ام بر اساس وزن مولکول های فلزی تهیه شد. مقدار اسیدیته محلول های استاندارد نیترات سرب ([Pb(NO3)2])، نیترات مس ([Cu(NO3)2])، نرترات کرومیوم ([Cr(NO3)3]) و نیترات کادمیوم ([Cd(NO3)2]) به ترتیب 2.10 ،2.08 ،2.09 و 2.13 بود.
کلمات کلیدی:
Adsorption capacity and removal efficiency of heavy metal ions by Moso and Ma bamboo activated carbons Sheng-Fong Lo a, Song-Yung Wangb, Ming-Jer Tsai b,∗, Lang-Dong Linc,d,∗ a Department of Forestry and Natural Resources, National Ilan University, I-Lan, Taiwan, ROC b School of Forestry and Resource Conservation, College of Bio-Resource and Agriculture, National Taiwan University, No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC c Department of Cultural Heritage Conservation, National Yunlin University of Science and Technology, Yunlin, Taiwan, ROC d Department of Forest Products Science, National Chiayi University, Chiayi, Taiwan, ROC a b s t r a c t In order to understand the adsorption capacity and removal efficiency of heavy metal ions by Moso and Ma bamboo activated carbons, the carbon yield, specific surface area, micropore area, zeta potential, and the effects of pH value, soaking time and dosage of bamboo activated carbon were investigated in this study. In comparison with onceactivated bamboo carbons, lower carbon yields, larger specific surface area and micropore volume were found for the twice-activated bamboo carbons. The optimum pH values for adsorption capacity and removal efficiency of heavy metal ions were 5.81–7.86 and 7.10–9.82 by Moso and Ma bamboo activated carbons, respectively. The optimum soaking time was 2–4h for Pb2+, 4–8h for Cu2+ and Cd2+, and 4h for Cr3+ by Moso bamboo activated carbons, and 1h for the tested heavy metal ions by Ma bamboo activated carbons. The adsorption capacity and removal efficiency of heavy metal ions of the various bamboo activated carbons decreased in the order: twice-activated Ma bamboo carbons > once-activated Ma bamboo carbons > twice-activated Moso bamboo carbons > once-activated Moso bamboo carbons. The Ma bamboo activated carbons had a lower zeta potential and effectively attracted positively charged metal ions. The removal efficiency of heavy metal ions by the various bamboo activated carbons decreased in the order: Pb2+ >Cu2+ >Cr3+ >Cd2+
