Cross-linked chitosan-glyoxal/kaolin clay composite: Parametric optimization for color removal and COD reduction of remazol brilliant blue R dye

Abstract

Kaolin clay (KN) was employed as an inorganic filler to modify a cross-linked chitosan-glyoxal as Schiff’s-based chitosan composite derivative (CTS-GLY). The resulting (CTS-GLY/KN) was found to be a promising composite synthetic biopolymer that can be potentially utilized for color removal as well as COD reduction of an industrial anionic dye (remazol brilliant blue R, RBBR). The surface porosity, crystallinity, morphology, functionality, charge, and amine content of the CTS-GLY/KN were studied using BET, XRD, SEM, FTIR, pHpzc and pH-potentiometric titration analyses, respectively. Response surface methodology-Box-Behnken design (RSM-BBD) was used to optimize the impact of the main input factors on the color removal and COD reduction of RBBR. The adsorptive performance CTS-GLY/KN towards RBBR was well-defined by both Langmuir and Freundlich isotherm models with highest adsorption capacity of 447.1 mg/g at 30 ˚C. This finding reveals that CTS-GLY/KN can be utilized as a promising, feasible, and environmentally friendly composite-biosorbent for color removal and COD reduction of textile dyes from aqueous medium.

FORMULASI NANOEKAPSULASI EKSTRAK DAUN KELOR (Moringa oleifera) /KITOSAN-NATRIUM TRIPOLIPOSFAT (NaTPP)

“…Kitosan yang diikat silang secara ionik menunjukkan derajat swelling yang rendah [21]. Kitosan terikat silang ini juga mudah diatur sesuai dengan fungsi yang diinginkan, seperti hidrofilisitas [22], kerapatan [23] dan kristalinitas [24]. Metode gelasi ionik dengan sonikasi juga digunakan untuk sintesis nanopartikel kitosan-TPP dan menghasilkan nanopartikel [25].…”

Synthesis, characterization, and applicability of an acrylic acid-grafted sodium alginate- based Zinc oxide hydrogel nanocomposite for crystal violet dye removal

“…Jawad and co-workers synthesized a cross-linked chitosanepichlorohydrin/TiO2 bioadsorbent nanocomposite and used it to remove the reactive red 120 dye from an aqueous solution with an adsorption capacity of 210 mg/g at 30 °C [13]. They also synthesized a new composite by the modification of a cross-linked chitosan-glyoxal with kaolin clay as an inorganic filler [14]. The prepared composite was applied in the color removal and COD reduction of the dye remazol brilliant blue R with the highest adsorption capacity of 447.1 mg/g at 30 °C.…”