Chemical activation of hickory and peanut hull hydrochars for removal of lead and methylene blue from aqueous solutions

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2017-01-01 DOI:10.1080/09542299.2017.1403294

J. Fang, B. Gao, A. Mosa, Lu Zhan

引用次数: 48

Abstract

Abstract Hickory and peanut hydrochars were chemically activated with KOH and H3PO4 and tested for their ability to remove methylene blue and lead from aqueous solutions. The physicochemical characteristics of the activated hydrochars determined were surface area, pore volume, and elemental composition. Kinetics and isotherm studies were then conducted on methylene blue adsorption. Compared to their nonactivated counterparts, the chemically activated hydrochars had higher surface areas and more functional groups. Activated hydrochars also had greater methylene blue and lead adsorption rates, which can be attributed to the improved physicochemical characteristics. H3PO4 activated hydrochars removed more contaminants than the corresponding KOH ones.

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山胡桃木和花生壳水炭的化学活化去除水溶液中的铅和亚甲基蓝

摘要用KOH和H3PO4对山核桃和花生水炭进行化学活化，并测试其从水溶液中去除亚甲基蓝和铅的能力。测定的活化水炭的物理化学特性包括表面积、孔隙体积和元素组成。然后对亚甲基蓝的吸附进行了动力学和等温线研究。与未活化的对应物相比，化学活化的水炭具有更高的表面积和更多的官能团。活化水炭对亚甲基蓝和铅的吸附率也较高，这可归因于理化特性的改善。H3PO4活化的水炭比相应的KOH水炭去除了更多的污染物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

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