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Title: Removal of heavy metals from waste water by using Rice husk
Authors: Arshdeep K
Bedi P.S.
Keywords: Heavy metals
Rice husk
Issue Date: 2021
Publisher: Research Journal of Chemistry and Environment
Abstract: Rice is staple food of India and it is grown in abundance. Rice husk (RH) acts as sorbent materials which help in removal of environmental pollution. This property of rice hull is utilized for adsorption of various pollutants from waste water like dyes, toxic heavy metals, organic/Inorganic compounds etc. This study presents a broad overview of the potential of rice husk as adsorbent for expulsion of heavy metal from waste water. The rice husk has great efficiency for the removal of toxic heavy metals like Lead (Pb), Mercury (Hg), Cadmium (Cd), Arsenic (As), Chromium (Cr), Copper (Cu), Zinc (Zn), Selenium (Se) and Nickel (Ni) from waste water. In this review paper, methods for preparation of activated sorbents such as Acid treated rice husk (ARH), Sodium hydroxide treated rice husk (NRH),Sodium carbonate treated rice husk (NCRH), Epichlorohydrin treated rice husk (ERH), Tartaric acid modified rice husk (TARH) prepared from rice husk are also discussed. The various factors responsible for adsorption of heavy metals by using rice husk ash are taken into account like pH, temperature, contact time, chelators and particles size.
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