Anionically functionalized guar gum embedded with silica nanoparticles: An efficient nanocomposite adsorbent for rapid adsorptive removal of toxic cationic dyes and metal ions

作者：Patra Abhay Shankar; Ghorai Soumitra; Sarkar Debabrata; Das Raghunath; Sarkar Supriya; Pal Sagar^*

来源：Bioresource Technology, 2017, 225: 367-376.

DOI：10.1016/j.biortech.2016.11.093

• Adsorption
• Guar gum
• Nanocomposite
• Sol-gel

In the present work, a novel biodegradable nanocomposite has been developed (h-GG/SiO2) based on anionically modified guar gum and in-situ deposited SiO2 NPs through sol-gel technique. Here the anionically modified guar gum stimulates the silica polymerization process and hence acts as a unique template for the development of spherical SiO2 NPs. Batch adsorption studies indicate that h-GG/SiO2 nanocomposite shows remarkable adsorption capacity for cationic dyes/metal ions (Q(max): 781.25 mg g(-1) for malachite green (MG), 281.69 mg g(-1) for safranin (SF); 645.16 mg g(-1) for Pb2+, 709.21 mg g(-1) for Cd2+) as well as it efficiently and selectively removes cationic MG from mixture of dye solutions. Finally the worthy regenerative efficacy of h-GG/SiO2 facilitates the adsorbent to be economically promising for practical application in the field of wastewater management.

• 出版日期2017-2