Selective removal of toxic anionic dyes using a novel nanocomposite derived from cationically modified guar gum and silica nanoparticles.
A novel nanocomposite derived from cationically modified guar gum and in-situ incorporated SiO2 NP (cat-GG/SiO2) has been developed. The cat-GG has been synthesised by grafting poly(2-(diethylamino)ethyl methacrylate) on GG backbone. Various analyses endorse the suitability of cat-GG as well-organized template for the development of homogeneous SiO2 NPs. Dye adsorption studies predict that cat-GG/SiO2 efficiently and selectively adsorb anionic dyes (reactive blue-RB and Congo red-CR) from mixture of dye solutions. This is because of high surface area, multifunctional chelating H-bonding interactions and electrostatic interactions of cationic adsorbent with anionic dyes. Dyes adsorbed on the composite surface are desorbed reversibly using pH 10 stripping solution. Besides, cat-GG/SiO2 has been recycled efficiently with no prominent loss of dye uptake capacity, even after 4 adsorption-desorption cycles.
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India; Tata Steel R&D, Jamshedpur 831 007, India.
Abhay Shankar
AS
Patra
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India; Tata Steel R&D, Jamshedpur 831 007, India.
Soumitra
S
Ghorai
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
Shankhamala
S
Ghosh
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
Barun
B
Mandal
Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India. Electronic address: sagarpal1@hotmail.com.
Sagar
S
Pal
D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D005685:Galactans / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009757:Nylons / Q000737:chemistry; D053149:Plant Gums / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
D004396:Coloring Agents; D005685:Galactans; D008351:Mannans; D008689:Methacrylates; D009757:Nylons; D053149:Plant Gums; C109846:poly(2-(diethylamino)ethyl methacrylate); D003224:Congo Red; D012822:Silicon Dioxide; C007894:guar gum
Guar gum; Nanocomposite; Selective adsorption