Removal of methylene blue and other pollutants from tannery wastewater using chemically modified tannery solid waste

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI:10.3329/jbas.v46i1.59693

Mohammad Nazmul Hossain, Md. Didarul Islam, Ashiqur Rahaman, M. Hasan, Meem Muhtasim Mahdi, Md. Arafat Hossain, N. Khatun, M. Matin

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Abstract

The adsorption of methylene blue (MB) was investigated using the prepared activated carbon (AC); obtained by the chemical activation of chrome shaving dust (CSD). Results represented that the increase of particle size and impregnation ratio of AC possessed a proportional effect on the adsorption of MB. AC produced by H3PO3, impregnation ratio of 1:6, and mesh size of 40 showed the highest adsorption performance. The removal of other organic and inorganic pollutants from different tannery effluent was found satisfactory like pH, conductivity, turbidity, BOD5, COD, and Cl- values are reduced to 5.5- 8.48, 73-93%, 76-92%, 80-96%, 71-87% and 84-94%, respectively which are nearly closed to the WHO’s standards for industrial effluent to the environment. The microscopic analysis confirmed the smooth and porous surface characteristics of the adsorbent. Hence, CSDAC can be expected to become an effective, low-cost, and suitable adsorbent for both dye and pollutants removal from industrial wastewater. J. Bangladesh Acad. Sci. 46(1); 75-83: June 2022

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利用化学改性制革厂固体废物去除制革厂废水中的亚甲基蓝和其他污染物

研究了活性炭对亚甲基蓝(MB)的吸附性能;通过化学活化铬剃须粉(CSD)得到。结果表明，活性炭的粒径和浸渍比的增加对吸附MB的影响成正比，以H3PO3为原料，浸渍比为1:6，目径为40的活性炭吸附性能最好。不同制革出水的pH、电导率、浊度、BOD5、COD、Cl-等有机、无机污染物去除率均较好，分别降至5.5 ~ 8.48、73 ~ 93%、76 ~ 92%、80 ~ 96%、71 ~ 87%、84 ~ 94%，基本接近世界卫生组织工业出水环境标准。显微分析证实了吸附剂表面光滑多孔的特性。因此，CSDAC有望成为一种有效、低成本、适合工业废水中染料和污染物去除的吸附剂。科学通报46(1);75-83: 2022年6月

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Journal of Bangladesh Academy of Sciences

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