Characterization of activated carbon, wood sawdust and their application for boron adsorption from water

IF 1.3 Q2 MATERIALS SCIENCE, PAPER & WOOD

International Wood Products Journal Pub Date : 2020-06-29 DOI:10.1080/20426445.2020.1785605

Mouna Jaouadi

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引用次数: 15

Abstract

ABSTRACT Pinewood sawdust is a good precursor for activated carbon production. Activated carbon was prepared from sawdust by chemical activation using H3PO4 at 300°C. The properties of sawdust and activated carbon were characterized by X-ray diffraction, Infrared Attenuated Total Reflectance and Raman spectroscopies, elemental analysis, ‘Boehm’ titration, measurements of pHPZC, nitrogen adsorption isotherms, scanning electron microscopy and differential scanning calorimetry. Sawdust and activated carbon were investigated as bio-adsorbents for boron removal from freshwater. Sawdust showed the highest boron adsorption uptake (1.58 mg g−1) compared to activated carbon (0.97 mg g−1). This higher capacity was caused by the presence of hydroxylic, carboxylic, and polyphenolic groups. FTIR analysis before and after adsorption of boron suggested that the mechanism involved in the boron removal might be complexation. Langmuir model has the best fitness quality with experimental data, as it gave the maximum R 2 value (0.99).

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活性炭、木屑的表征及其在水中硼吸附中的应用

摘要：松木木屑是生产活性炭的良好原料。活性炭是由木屑在300°C下使用H3PO4通过化学活化制备的。通过X射线衍射、红外衰减全反射光谱和拉曼光谱、元素分析、Boehm滴定、pHPZC测量、氮吸附等温线、扫描电子显微镜和差示扫描量热法对木屑和活性炭的性能进行了表征。研究了木屑和活性炭作为生物吸附剂去除淡水中硼的效果。木屑对硼的吸附量最高（1.58 毫克 g−1）与活性炭（0.97 毫克 g−1）。这种较高的容量是由羟基、羧基和多酚基团的存在引起的。红外光谱分析表明，硼吸附前后的脱硼机理可能是络合作用。Langmuir模型与实验数据的拟合质量最好，其R2值最大（0.99）。

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来源期刊

International Wood Products Journal MATERIALS SCIENCE, PAPER & WOOD-

CiteScore

2.40

自引率

0.00%

发文量