Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

Abstract

This article discusses the potential applications of natural polysaccharide-based graphene oxide nanomaterials in the field of wastewater remediation through the removal of organic and synthetic dyes. Being highly toxic, carcinogenic, and nonbiodegradable, dyes disposed from textile, paper, and printing industries etc. pose a serious threat to various life forms on earth. Recently, there has been an increased interest in the amalgamation of biopolymers, such as polysaccharides, with the high adsorption efficiency of graphene oxide. Polysaccharides, apart from being nontoxic, low cost, and eco-friendly, possess a variety of functional groups enabling them to be easily tuned for the desired applications. When grafted with GO nanosheets, they give rise to unique nanomaterials possessing diverse applications, especially in the eradication of harmful contaminants from wastewater. This review is an attempt to give consolidated and detailed information on different aspects of the adsorption behavior of various potentially low-cost polysaccharide-based GO nanoadsorbents toward lethal dyes. The characterization techniques used, adsorption isotherms, kinetics, thermodynamic behavior, recyclability, and swelling properties as well as the adsorption mechanism have been outlined in this article. The whole anthology of literature reports excellent dye removal efficiency with significant regeneration performance making these nanoadsorbents promising candidates for practical applications. In view of all aspects, this review recommends the use of such sustainable adsorbents with a further search toward obtaining the polysaccharides from natural wastes.

Investigation of Hybrid Methods for Elimination of Brilliant Blue Dye from Water Phase Using Various Nanomaterials Combined with Activated Sludge and Duckweed

“…We have documented that GO additive may significantly change biological activity of activated sludge microorganisms [ 6 ]. Graphene oxide seems to be a promising material to develop new hybrid nanocomposites involving natural polysaccharides for removal of dyes from wastewater [ 36 ]. In our experiment, both direct interaction of BB with GO and effects of GO on activated sludge microorganisms can be present.…”

Graphene-Based Nanomaterials Modulate Internal Biofilm Interactions and Microbial Diversity

“…Indeed, the GBMs were shown to be able to interact with natural organic matter including polysaccharydes ( Chowdhury et al, 2014 ). As these interactions depend on the nature of oxygen-containg functional groups ( Saya et al, 2021 ), the interaction dynamics between EPS and GO or rGO could be different, influencing the contact with bacterial cells embeded in EPS. In addition to the increase in EPS excretion, the composition and the quality of the EPS produced by the diatoms could be modified by the presence of GBMs.…”

Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash

“…These dyes adversely affect the environment and ecosystems by increasing the chemical and biochemical oxygen demand (COD and BOD, respectively), hampering the photosynthesis process and leading to bioaccumulation. 15 Therefore, their removal from industrial wastewater is of major environmental concern. Several techniques to remove organic dyes from wastewater are available, including membrane separation, photocatalytic degradation, enzymatic degradation, biodegradation, Fenton treatment, and adsorption.…”