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The removal of hazardous heavy metals from the environment is imperative in order to have quality of water. Robust and eco-friendly technologies are required for the treatment of domestic, agricultural and industrial effluents. The effective treatment of wastewaters can be done using chemically modified polysaccharides as adsorbents of these toxic heavy metals. A popular method used by researchers to chemically polysaccharide adsorbents is carboxymethylation. Carboxymethyl polysaccharides, generally, have higher adsorption capacities for heavy metals than t