Elimination of Heavy Metals from Wastewater Using Agricultural Wastes as Adsorbents
نویسندگان
چکیده
The adsorption process is being widely used by various researchers for the removal of heavy metals from waste streams and activated carbon has been frequently used as an adsorbent. Despite its extensive use in the water and wastewater treatment industries, activated carbon remains an expensive material. In recent years, the need for safe and economical methods for the elimination of heavy metals from contaminated waters has necessitated research interest towards the production of low cost alternatives to commercially available activated carbon. Therefore there is an urgent need that all possible sources of agro-based inexpensive adsorbents should be explored and their feasibility for the removal of heavy metals should be studied in detail. The objective of this study is to contribute in the search for less expensive adsorbents and their utilization possibilities for various agricultural waste by-products such as sugarcane bagasse, rice husk, oil palm shell, coconut shell, coconut husk etc. for the elimination of heavy metals from wastewater. ABSTRAK Penjerapan adalah teknik yang digunakan secara meluas oleh para penyelidik untuk perawatan air sisa yang dicemari oleh logam berat dan karbon teraktif banyak digunakan sebagai penjerap. Walaupun karbon ini banyak kegunaannya dalam perawatan air dan air sisa industri, ianya masih suatu bahan yang mahal. Baru-baru ini keperluan untuk kaedah yang selamat dan ekonomi untuk perawatan logam berat telah menumpukan minat penyelidik-penyelidik ke arah bahan yang lebih murah dan kedapatan karbon teraktif yang komersial. Satu keperluan untuk mengkaji sisa pertanian sebagai bahan ganti karbon teraktif komersial telah wujud dan penyelidikan yang terperinci akan tindakan mereka terhadap logam berat mesti dilakukan. Objektif kajian ini adalah untuk menyumbang kepada kajian dalam mencari penjerap yang murah dan kebolehgunaan bahan ini seperti hampas tebu, hampas padi, tempurung kelapa sawit, tempurung kelapa, sabut kelapa dll. untuk merawat logam berat dalam air sisa. (adsorption, adsorbents, agricultural wastes, heavy metals, wastewater)
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