Treated Coal Bottom Ash for Palm Oil Mill Effluent (POME) Decolourisation

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Journal of Physical Science Pub Date : 2019-11-25 DOI:10.21315/jps2019.30.3.7

S. Saleh, Ghani Wan Azlina Wan Ab Karim, K. L. Soh

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引用次数: 5

Abstract

: The coal bottom ash (CBA) sourced from thermal power plant was chemically treated using hydrochloric acid (HCl), namely CBA-HCl, and used as an adsorbent for palm oil mill effluent (POME) decolourisation. The treated CBA-HCl was characterised for surface property via Brunauer-Emmett-Teller (BET), surface chemistry via Fourier transform infrared (FTIR) and surface morphology via scanning electron microscopy (SEM). Its effectiveness for adsorption of POME colour was investigated via batch experiments as a function of pH, initial POME concentration, adsorbent dosage and contact time. The adsorption increased with increasing contact time until an equilibrium state was achieved within 18 h to 24 h. The maximum POME colour removal, 81.15% was achieved at pH 6 utilising 14% (w/v) adsorbent dosage for 24 h. The colour adsorption isotherm and kinetics of the CBA-HCl was well-fitted with Freundlich and pseudo-second order models with correlation coefficient, R 2 = 0.9991 and R 2 = 0.9996, respectively. Based on the results, CBA can be a potential adsorbent in removing POME colour before being discharged into a watercourse.

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棕榈油厂废水(POME)脱色处理的煤底灰

:采用盐酸(HCl)即CBA-HCl对火力发电厂的煤底灰(CBA)进行化学处理，并将其用作棕榈油厂废水(POME)脱色的吸附剂。处理后的CBA-HCl通过bruauer - emmet - teller (BET)、傅里叶变换红外(FTIR)和扫描电子显微镜(SEM)对其表面形貌进行表征。通过批量实验考察了其对POME颜色的吸附效果与pH、初始POME浓度、吸附剂用量和接触时间的关系。吸附量随接触时间的增加而增加，直到在18 ~ 24 h内达到平衡状态。在pH为6、吸附剂用量为14% (w/v)的条件下，24 h POME的最大去色率为81.15%。CBA-HCl的颜色吸附等温线和动力学符合Freundlich和准二阶模型，相关系数分别为r2 = 0.9991和r2 = 0.9996。基于这些结果，CBA可以成为一种潜在的吸附剂，在排放到水道之前去除POME的颜色。

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

Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.