Paper Details

REVIEW ON THE USE OF RICE HUSK IN THE ADSORPTION OF HEAVY METALS FROM WASTEWATER

Vol. 2, Jan-Dec 2016 | Page: 1-10

Gambo S B
Dept of Environmental Engg, Cyprus International University, Nicosia, Turkish Republic of Northern Cyprus.

Mahdi S
Kano State College of Arts, Science and Remedial Studies, CAS, Kano, Nigeria

Sa’íd Z A
Department of Biochemistry, Northwest University, Kano, Nigeria

Idris M
Department of Microbiology, Bayero University Kano, Nigeria

Received: 20-02-2016, Accepted: 03-04-2016, Published Online: 15-04-2016


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Abstract

Rice husk has been used in the removal of heavy metals from wastewater in its modified or unmodified form. This paper reviews the work done by various researchers. Modified or treated rice husk was seen to have an affinity to heavy metals due to the presence of functional groups on its surface such as carboxylic and hydroxyl groups. Its affinity towards the following heavy metals was studied; Cd (II), Pb (II), Zn (II), Hg (II), Cu (II) and Fe (II). The removal of these metals was studied at varying pH, contact time, agitation rate, temperature, adsorbent dose and initial concentration of sorbate. Most of the heavy metals were seen to have a high sorption capacity with increase in sorbate dosage and at a pH of about 6-6.5. Also the types of techniques used were considered and a higher column depth was seen to have a higher sorption capacity.

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