石墨烯-活性炭复合材料吸附废水中三价砷的合成及性能研究

A. Ghozatloo, A. Zarei, M. Arjomandi
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引用次数: 2

摘要

废水中的高砷含量是人类关注的主要问题,从废水中去除砷既困难又昂贵。除砷最常用的技术有膜分离、离子交换、氧化和混凝。活性炭是废水处理过程中最常用的砷吸附剂,本研究将其作为主要吸附剂,并尝试用石墨烯纳米片改善其表面性能。因此,通过在碳结构中加入石墨烯(4.5%w),其孔隙度增加,离子交换行为和表面负载得到纠正。在不同的pH值下,考察了时间过程、砷浓度和吸附剂的影响。对砷的最大吸附量为91.8%;此外,当使用石墨烯时,砷的吸收率提高了约5.2%,工艺时间缩短。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and performance of graphene and activated carbon composite for absorption of three-valance arsenic from wastewater
    High levels of arsenic in the effluent are a major concern of human, and the removal of it from the wastewater is hard and costly. The most common techniques for removal of arsenic are membrane separation, ion exchange, oxidation, and coagulation. The active carbon is used as the most common arsenic adsorbent in wastewater treatment processes, this study has been considered as the main adsorbent and attempted to improve its surface properties by graphene nanosheets. Thus, by adding graphene (4.5%w) to the carbon structure, its porosity increases, and the ion exchange behavior and surface load are corrected. In this research, the effects of time process, concentration of arsenic, and adsorbent are evaluated in different pH values. It has been observed that the maximum adsorption of arsenic is 91.8%; in addition, when graphene is used, the rate of absorption of Arsenic has increased about 5.2%, and the process time is shortened.
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