Fabrication of nano-graphene oxide assisted hydrotalcite/chitosan biocomposite: An efficient adsorbent for chromium removal from water.

Recently, nanomaterials based adsorbents play a prominent role in the removal of toxic ions from aqueous solution. Hence in the present study, nano-graphene oxide (n-GO) fabricated hydrotalcite (n-GO@HT) composite was prepared by hydrothermal method for chromium removal. To improve the mechanical strength and chromium removal capacity, GO@HT composite was reinforced with chitosan (CS) to form hybrid composite namely n-GO@HTCS biocomposite.

Fabrication of magnetic particles imprinted cellulose based biocomposites for chromium(VI) removal.

The present study was focused on Cr(VI) removal using eco-friendly materials like cellulose (Cel), hydrotalcite (HT), hydroxyapatite (HAp) and their composite forms. The cellulose/hydrotalcite (CelHT) and cellulose/hydroxyapatite (CelHAp) composites were synthesized by dispersing HT and HAp individually in cellulose polymeric matrix. To enhance the Cr(VI) sorption capacity (SC) and easy separation, cellulose supported magnetic composites namely iron-oxide coated cellulose/hydrotalcite (FeO@CelHT) and cellulose/hydroxyapatite (FeO@CelHAp) were synthesized by in situ fabrication method.

Remediation of fluoride from drinking water using magnetic iron oxide coated hydrotalcite/chitosan composite.

The present study was performed to examine the probability of magnetic iron oxide fabricated hydrotalcite/chitosan (FeO@HTCS) composite for the removal of excess fluoride content from drinking water. The developed FeO@HTCS composite not only demonstrate the good separation ability but also display an extreme enhanced defluoridation capacity (DC) when compared to other base components and composite. The DCs of FeO@HTCS composite, FeO@HT composite, FeO, HT and CS was found to be 5032, 3041, 1050, 1030 and 52mgF/kg respectively.

Synthesis of assorted metal ions anchored alginate bentonite biocomposites for Cr(VI) sorption.

Biocomposites were synthesized by dispersing bentonite (Bent) clay in a biopolymer namely alginate (Alg) and cross-linked with bi (Ca(2+)), tri (Ce(3+)) and tetravalent (Zr(4+)) metal ions viz., Ca@AlgBent, Ce@AlgBent and Zr@AlgBent composites respectively. The synthesized biocomposites were characterized by various instrumental techniques like FTIR, SEM and EDAX.