Arsenate removal from water using Fe₃O₄-loaded activated carbon prepared from waste biomass

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• 作者：Zhengang Liu ; Fu-Shen Zhang ; Ryo Sasai
• 关键词：Waste biomass ; Arsenic ; Magnetization ; Adsorption isotherm
• 刊名：Chemical Engineering Journal
• 出版年：2010
• 出版时间：15 May 2010
• 年：2010
• 卷：160
• 期：1
• 页码：57-62
• 全文大小：564 K

文摘

A novel process for the preparation of Fe₃O₄-loaded activated carbon (MY) was developed using waste biomass. The key point of the synthetic strategy was that the carbonization, activation and Fe₃O₄ loading were accomplished simultaneously. The low-cost composite was characterized and used as an adsorbent for arsenate removal from water. The results showed that the Fe₃O₄ particles were uniformly deposited on the surface of the composite. The composite exhibited high surface area of 349 m²/g, pore volume of 0.20 cm³/g and iron of 39 wt. % for arsenate adsorption. As an adsorbent, higher temperature favored the adsorption capacity and the adsorption process was well fitted by pseudo-second-order model. The composite showed an excellent adsorption capability for arsenate with a maximum adsorption capacity of 204.2 mg/g at pH 8.0 and the adsorption process followed the Freundlich isotherm model well. In addition, the composite exhibited a saturation magnetization of 47.67 emu/g, which allowed it to be easily recovered by an external magnetic field after the adsorption process.