Effect of pyrolysis temperature and hold time on the characteristic parameters of adsorbent derived from sewage sludge

Abstract： According to the Doehlert' s matrix method, the adsorbent derived from sewage sludge was prepared through chemical activation under controlling the pyrolysis temperature and hold time. The characteristic parameters including the total yield, adsorption of methylene blue, adsorption of iodine, BET surface area, micro-pore volume are 35%-49%, 16.5-38 mg/g, 285-362 mg/g, 185-359 m2/g, and 0.112-0.224 m3/g, respectively. According to the experimental data, the multi-linear regression method was adopted to fit the relations between the characteristic parameters and influential factors. At final, through optimization method, the optimal adsorbent is obtained when using 62 min as hold time and 1105K as pyrolysis temperature. Under the conditions, the adsorbent was produced and compared the characteristic parameters with model forecast value, the coherence is satisfied. 作 者： ZHAI Yun-bo    Wei Xian-xun    ZENG Guang-ming   作者单位： Department of Environmental Science and Engineering,Hunan University, Changsha 410082, China  期 刊： 环境科学学报(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(4)  分类号： X703 O647.3  Keywords： adsorbent    sewage sludge    pyrolysis temperature    hold time    Doehlert' s matrix   

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