Preparation of sewage sludge based activated carbon by using Fenton¡¯s reagent and their use in 2-Naphthol adsorption

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• 作者：Lin Gu ; Yachen Wang ; Nanwen Zhu ; Daofang Zhang ; Shouqiang Huang ; Haiping Yuan ; Ziyang Lou ; Miaolin Wang
• 关键词：Fenton ; Hydrogen peroxide ; Sewage sludge ; Char
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：146
• 期：Complete
• 页码：779-784
• 全文大小：836 K

文摘

In this study, Fenton¡¯s reagents (H₂O₂/Fe²⁺) are used to activate raw sewage sludge for the preparation of the sludge based activated carbon. The effect of the amount of hydrogen peroxide addition on carbon¡¯s chemical composition, texture properties, surface chemistry and morphology are investigated. Choosing an appropriate H₂O₂ dosage (5 v % ) (equivalent to 70.7 mM/(g VS)), it is possible to obtain a comparatively highly porous materials with S_BET and the total pore volume being 321 m²/g and 0.414 cm³/g, respectively. Continuously increasing the oxidant ratio resulted in a decreased S_BET value. Further adsorption experiments by using 2-naphthol as model pollutant revealed that the adoption followed a pseudo-second-order kinetics better than pseudo-first-order. The calculated adsorption capacity is 111.9 mg/g on the carbon with 5 % H₂O₂ pretreatment while this value is just 51.5 mg/g on carbons without any pretreatment.