Microwave Assisted Urea Modified Bengal Gram Husk for the Batch Wise Removal of Methylene Blue from Aqueous Medium

IF 0.4 Q4 CHEMISTRY, ANALYTICAL Pakistan Journal of Analytical & Environmental Chemistry Pub Date : 2018-12-28 DOI:10.21743/PJAEC/2018.12.17

A. Dar, Iram Riaz, J. Anwar

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Abstract

Effluents from industries directly pollute water bodies as a result the drinking water sources are contaminated. In present study, removal of methylene blue from aqueous medium by using raw bengal gram husk (RBGH) and microwave assisted urea modified Bengal gram husk (UMBGH) was done. Effect of different parameters such as contact time, shaking speed, adsorbent dose, temperature, pH were studied. Mechanism of adsorption was revealed using Langmuir, Freundlich and Temkin adsorption model. Experimental data followed the Langmuir adsorption isotherm that is revealed from the R 2 values and adsorption capacity (q max ) 7.915 mg g -1 and 111.178 mg g -1 for both RBGH and UMBGH, respectively. The value of “n” was 1.001 and 0.979 for RBGH and UMBGH which indicated that adsorption was favorable. B T value of RBGH and UMBGH was 5.784 and 4.093, respectively which revealed that adsorption was physical in nature. Present study proved that microwave assisted urea modification of Bengal gram husk greatly increased the removal efficiency of the adsorbent.

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微波辅助尿素修饰孟加拉革壳批量脱除水中亚甲基蓝的研究

由于饮用水源受到污染，工业废水直接污染水体。本研究采用生孟加拉稻壳（RBGH）和微波辅助尿素改性孟加拉稻壳（UMBGH）从水介质中去除亚甲基蓝。研究了接触时间、振荡速度、吸附剂用量、温度、pH等不同参数对吸附效果的影响。采用Langmuir、Freundlich和Temkin吸附模型揭示了吸附机理。实验数据遵循Langmuir吸附等温线，由RBGH和UMBGH的R2值和吸附容量（qmax）分别为7.915 mg g-1和111.178mg g-1。RBGH和UMBGH的“n”值分别为1.001和0.979，表明吸附是有利的。RBGH和UMBGH的BT值分别为5.784和4.093，表明吸附具有物理性质。研究表明，微波辅助尿素对孟加拉果壳的改性大大提高了吸附剂的去除效率。

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