Elimination of Heavy Metals from Wastewater Using Agricultural Wastes as Adsorbents

نویسندگان

  • Nasim Ahmad Khan
  • Shaliza Ibrahim
  • Piarapakaran Subramaniam
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)

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Low-cost Adsorbents Used in Heavy Metal Contaminated Waste Water Treatment

In this review, adsorbents used in wastewater treatment and their technical feasibilities are reviewed. Adsorbents are classified as natural adsorbents, and the adsorbents obtained from industrial and agricultural wastes. They all were compared with each other condensing the metal binding capacities, costs and metal removal performances in waste water treatments. Although commercial activated c...

متن کامل

Potentiality of agricultural adsorbent for the sequestering of metal ions from wastewater

The expensive nature of metal ions detoxification from wastewater have restricted the use of conventional treatment technologies. Cheap, alternative measures have been adopted to eliminate metal contamination, and adsorptions using agricultural adsorbents seem to be the way forward. The use of agricultural adsorbents for cadmium (II), copper (II) and lead (II) ion removal has gained more intere...

متن کامل

Assessment of Food Processing and Pharmaceutical Industrial Wastes as Potential Biosorbents: A Review

There is a growing need for the use of low-cost and ecofriendly adsorbents in water/wastewater treatment applications. Conventional adsorbents as well as biosorbents from different natural and agricultural sources have been extensively studied and reviewed. However, there is a lack of reviews on biosorption utilizing industrial wastes, particularly those of food processing and pharmaceuticals. ...

متن کامل

Applications on agricultural and forest waste adsorbents for the removal of lead (II) from contaminated waters

At present, there is growing interest in using low cost, commercially available materials for the adsorption of heavy metals. The major advantages of adsorption technologies are its effectiveness in reducing the concentration of heavy metal ions to very low levels and the use of inexpensive adsorbent materials. In this review, agricultural and forest waste adsorbents were used to remove Pb ions...

متن کامل

Agricultural and agro-processing wastes as low cost adsorbents for metal removal from wastewater: A review

This study reviews the use of agricultural and agro-processing industry wastes as metal adsorbents from wastewater. Modified materials displayed better adsorption capacity and capability of some was comparable with that of commercial activated carbons and synthetic resins. Agricultural wastes are low-cost adsorbents and can be viable alternatives to activated carbon for treatment of metal-conta...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004