Comparisons of Rice Husk and Activated Carbon in Removal of Cadmium from Aqueous Solution in Low Concentration
Subject Areas : Article frome a thesis
1 - دانشیار گروه مهندسی آب دانشگاه زابل
Keywords: Cadmium ion, Rice Husk, Activated Carbon, equilibrium time, adsorption efficiency,
Abstract :
In this study, rice husk (RH) and activated carbon (AC) adsorbents was used for removing of cadmium ion from aqueous solution at pH = 6. Equilibrium time was shortened with a decrease in initial concentration of Cd from 50 mg/l to 1 mg/l for both adsorbent. This time was 60 and 45 minutes for rice RH and AC, respectively. Furthermore, not only the equilibrium time decreased with increasing initial concentration from 50 mg/l to 500 mg/l, but it became identical for both absorbents. Adsorption efficiency increased with a decrease in initial concentration of solution for both adsorbents. Maximum adsorption efficiency was found for RH and AC at initial concentration of 1 mg/l. Obtained adsorption efficiency at this concentration were approximately 98.0 and 99.7 percent for RH and AC, respectively. Fitting the results to the Lagergren (1898) and Ho et al. (1996) models was also attempted; the latter model better described the outcome. Moreover, the Freundlich isotherm better described the data than the Langmuir isotherm.
صنعتی بهوسیلهی پوستهی شلتوک برنج، خاک اره و
خاک، پایان نامه کارشناسی ارشـد، دانشـگاه صـنعتی
اصفهان. رشته خاکشناسی- 157
های کربن فعال و کربن غربال مولکولی با اسـتفاده از
شبیه های مختلف جذب، پایان نامه کارشناسی ارشد،
دانشگاه علم و صنعت ایران. رشته شیمی تجزیه 134
ص.
و کربن فعال در حذف کادمیوم با غلظت کم از محیط آبی
آبیـاری بـا فاضـلاب تصفیه شده. مجموعـه مقـالات همـایش جنبـه هـای
زیست محیطی استفاده از پساب در آبیـاری. دانشـگاه
شهید چمران اهواز 28،26-1 .
سرب از محلول آبی بهوسـیلهی پوسـتهی شـلتوک و
کــربن فعـال، پایـان نامـه کارشناسـی ارشـد رشـته
مهندسی آب. دانشگاه زابل. 178 ص .
تغییرات جرم جاذب خاک اره بر جنبشی جـذب فلـز
کروم در محیط آبی. مجله محـیط شناسـی دانشـگاه
.68-61 : 56 ،تهران
بـازده جـذب کـادمیوم در محـیط آبـی بـهوسـیلهی
پوستهی شلتوک اصلاح شـده، مجلـه علـوم، دانشـگاه
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