A Critical Insight into Biomass Derived Biosorbent for Bioremediation of Dyes

Abstract

Organic pollutants, such as dyes released during industrial operations are one of the major reasons for the degradation of water quality. However, treatment technologies to remediate these high volumes of wastewaters are often not sufficient. Hence, the excess dye wastewater generated is usually discharged without prior treatment. The use of adsorbents such as activated carbon is widely employed to separate dye molecules from wastewater. Biochar is a popular recent alternative for the treatment of dye‐bearing effluents to selectively isolate dye molecules. Biochar is normally manufactured in the oxygen free environment by thermal degradation of organic materials. On the other hand, dyes are extensively employed in many textile industries because of their desirable properties including attractive colour, water‐fast and easy application methods. Nevertheless, during the dyeing process of cellulose fibres around half of the applied dyes may enter the wash water, and these let outs are highly resistant to traditional wastewater treatment methods. Henceforth, new techniques need to be applied for successful remediation of dye wastewaters. In this perspective, an endeavor has been made in this work to explore the possibility and practicability of biochar as sorbent material for dyes.

A new type of calcium-rich biochars derived from spent mushroom substrates and their efficient adsorption properties for cationic dyes

“…Up to now, many researchers have endeavored to remove dyes from wastewater ( Ravindiran et al, 2019 ). The main methods utilized for dye wastewater treatment are chemical coagulation, membrane separation, solvent extraction, photocatalytic oxidation, electrolysis, microbial degradation and adsorption ( Sajjadi et al, 2021 ; Yar and Parlayici, 2022 ; Zhao et al, 2022 ).…”

Oxidation State and Structure of Fe in Nontronite: From Oxidizing to Reducing Conditions

“…Samples of native NAu-2, washed low-red, and high-red NAu-2 were collected for XRD measurements (Figure 2). The XRD pattern of sample NAu-2 is characteristic for nontronite, with the main reflection being 00l reflections and asymmetrical hk reflections due to turbostratic stacking, for example, the (11,02) and (20,13) reflections at ∼1.41 Å −1 and ∼2.47 Å −1 . With increasing reduction degree, additional reflections (black arrows) emerge, for example at 2.23 Å −1 , 3.15 Å −1 , and 3.86 Å −1 , and are attributed to a phase structurally similar to KFeO 2 (ICDD Card #83−-2153).…”

Effect of Temperature and MgCl2 Concentration on the Catalytic Pyrolysis of Malt Waste Using Response Surface Methodology

“…Regarding possible biochar applications, some works in the literature recommend its use as an adsorbent for the decolorization of reactive dyes, [80–82] supercapacitor, [83] soil conditioner [84] and CO 2 adsorption material [85] . The high HHV of biochar from non‐catalytic pyrolysis of MW can allow its use as a renewable energy source, while the catalytic biochar can be used as soil amendment and a Mg source for the soil [86] …”