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Metal ion bonding methionine1/2/2023 ![]() Because of its biocompatibility, abundance, environment friendly and relatively low cost compared to other biopolymers, it has been widely used for removal of metal ions from waste water (Alboofetileh et al., 2014). The polysaccharide, Sodium alginate, a water-soluble salt of alginic acid, is a natural binary heteropolymer containing varying proportions of 1, 4-linked α- l-glutamic acid and β- d-mannuronic acid units in a pyranose form, arranged in linear blocks (Kim et al., 2013). l-methionine is an interesting non-toxic biomolecule in the heavy metal trapping field because of its amino, carboxylic and thiol ligand side chain (Faghihian and Nejati-Yazdinejad, 2009, Ozturk et al., 2008). Bentonite was modified by the biologically-based ligand, l-methionine, through a simple sorption technique. But due to high efficiency, ease of handling, availability of raw materials, cost effectiveness and low energy consumption adsorption is generally preferred for the removal of low concentrations of heavy metal ions (Yu et al., 2013).īentonite, have several advantages used as a support, including its lack of toxicity, chemical reactivity and hydrophilicity. Various techniques/methods potentially used for the treatment of heavy metal ions includes precipitation, floatation, oxidation, evaporation, electro-chemical removal, reduction, ion-exchange, filtration, reverse osmosis and adsorption (Badruddoza et al., 2013). The maximum permissible limit for Cd(II) concentration in drinking water in India is 0.01 mg L −1 (Kulkarni and Kaware, 2013).Ī great deal of effort has been devoted for the effective remediation of environmental contaminants and now it is a great challenge for the modern world. Acute exposure of Cd(II) can cause lung inflammation, and chronic exposure can cause lung cancer, osteomalacia, proteinuria (Kulkarni and Kaware, 2013). The permissible limit for Pb(II) in drinking water as set by the EU, USEPA and WHO is 0.010, 0.015 and 0.010 mg L −1, respectively (Ahmad and Haseeb, 2013). Acute exposure to lead can cause brain dysfunction, nausea, vomiting, and chronic exposure can cause anemia, encephalopathy, nephropathy, palsy etc. As per the present scenario, the resources become increasingly limited with the exponentially increasing population therefore, the need for controlling heavy metal contamination has become wide area of investigation (Unuabonah et al., 2008). Water contamination due to toxic heavy metals such as Pb(II), Cd(II), Hg(II), Cu(II) and Ni(II) is hazardous due to its selective toxicity even at low concentration. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.Due to human non-adherence to environmental laws in their quest for rapid industrialization, veneration of our pristine environment is geometrically diminishing (Auta and Hameed, 2013). Inventor Irantzu SADABA ZUBIRI Esben Taarning Despina TZOULAKI Original Assignee Haldor Topsøe A/S Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents WO2016174231A1 - A process for the preparation of methionine alpha-hydroxy analogues from sugars and derivatives thereof WO2016174231A1 - A process for the preparation of methionine alpha-hydroxy analogues from sugars and derivatives thereof ![]()
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