IJE TRANSACTIONS B: Applications - Special Issue - Sustainable Technologies for Water and Environment; Guest Editor Prof. Dr. Ahmad Fauzi Ismail and Associate Guest Editor Dr. Lau Woei Jye, Universiti Teknologi Malaysia (UTM), Malaysia
Vol. 31, No. 8 (August 2018) 1341-1346    Article in Press

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S. Shahrin, W. J. Lau, P. S. Goh, J. Jaafar and A. F. Fauzi Ismail
( Received: December 19, 2017 – Accepted: March 21, 2018 )

Abstract    Chromium (Cr) and copper (Cu) are heavy metals known for their dangerous effect towards human health and could enter into human body mainly through ingestion. Over the years, different treatment methods have been used to eliminate heavy metal from raw water source and these include (co)precipitation, coagulation/flocculation, adsorption and ion- exchange. Nonetheless, adsorption is the most prominent method due to its high adsorption capacity and low cost. In this work, graphene oxide-manganese ferrite (GMF) nanomaterials were synthesized and used to remove Cr(VI) and Cu(II) ions from water solution based on adsorption mechanism. The synthesized nanomaterials were characterized using FTIR, BET and TEM prior to use in adsorption process. Batch adsorption studies were carried out to study the adsorption capacity and kinetic properties of the nanomaterials in eliminating two selective heavy metal ions. At optimum pH value, the maximum adsorption capacity for Cr(VI) and Cu(II) are 34.02 mg/g and 66.94 mg/g, respectively. The experimental data revealed that the adsorption isotherm best fitted Langmuir model and followed Pseudo second order.


Keywords    nanomaterial, heavy metals, adsorption, removal


چکیده    کروم و مس (Cu) فلزات سنگین هستند که به خاطر تاثیرات خطرناک آنها نسبت به سلامت انسان شناخته شده است و می توانند به طور عمده از طریق خوراک وارد بدن انسان شوند. در طول سالها، روش های مختلف درمان برای حذف فلز سنگین از منبع آب خام مورد استفاده قرار گرفته است و شامل بارش (co)، انعقاد / flocculation، جذب و تبادل یونی است. با این حال، جذب به عنوان یکی از مهم ترین روش ها به دلیل ظرفیت جذب بالا و هزینه کم است. در این کار، نانومواد فریت اکسید منگنز گرافین (GMF) گرافین سنتز شده و برای حذف یونهای Cr (VI) و Cu (II) از محلول آب بر اساس مکانیزم جذب استفاده می شود. نانو مواد سنتز شده با استفاده از FTIR، BET و TEM قبل از استفاده در فرایند جذب مشخص شد. مطالعات جذب دسته ای برای بررسی ظرفیت جذب و خواص جنبشی نانومواد در حذف دو یون فلز انتخابی سنگین انجام شده است. در pH مطلوب، حداکثر ظرفیت جذب (Cr (VI و Cu (II) به ترتیب 34.02 و 94.66 میلی گرم بر گرم است. داده های آزمایشی نشان داد که ایزوترم جذب به بهترین وجه مدل لانگمویر و به ترتیب پسیو دوم را دنبال می کند.

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