Efficient adsorption capability of banana and cassava biochar for malachite green: Removal process and mechanism exploration

Abstract

In this study, banana biochar (BB) and cassava biochar (CB) were roasted in a tube furnace at 400℃ for 2 h, and their adsorption effects on malachite green (MG) were studied. The removal of MG with respect to the solution concentration and reaction time was also investigated. The results show that the optimal amount of biochar is 2 g/L. Studies of the adsorption kinetics and adsorption isotherms show that the pseudo-second-order kinetics can most accurately reflect the adsorption process. Freundlich model fits the experimental data well. The theoretical saturated adsorption capacities of BB and CB are 1,092.80 mg/g and 261.42 mg/g, respectively. SEM-EDS, TGA, BET, FTIR, XRD, element analysis and other characterization techniques were used to explore the adsorption mechanism. Based on the characterization results, it is speculated that the adsorption of BB and CB for MG mainly includes chemical adsorption and physical adsorption.

Effective removal of cationic dyes from aqueous solutions by using black cumin (Nigella sativa) seed pulp and biochar

“…The weight loss at between 200 and 450 C can be attributed to the degradation of cellulose, hemicellulose, and other volatile components. The weight loss above that temperature reflects the degradation of residual lignin (Choudhary et al 2020;Sismanoglu et al 2022;Deng et al 2022). When the thermal behavior graphs of the adsorption of dyestuffs with pure black cumin and pure black cumin in Figs.…”

A review on bio-crude production from algal biomass using catalytic hydrothermal liquefaction process

“…And it is also used for agricultural and irrigation propose [131,132]. The bio-char application is identified using the physicochemical characterization of hydrothermal liquefaction bio-char [133,134]. This bio-char contains high nitrogen and carbon content along with inorganic metals like Mg, Ca, P, and K allowing the bio-char to be utilized in the soil in agricultural practices [135].…”

Adsorption of Cationic Contaminants by Cyclodextrin Nanosponges Cross-Linked with 1,2,3,4-Butanetetracarboxylic Acid and Poly(vinyl alcohol)

“…Therefore, MG was reported in the literature by adsorption [42,43]. Various adsorbents were prepared for MG removal such as activated carbon [31,44], bentonite [45,46], bio-based material [47][48][49], carbon nanotubes [50], cellulose nanofiber [51,52], chitosan [53], clay [54], cyclodextrin [55,56], graphene oxide [57], kaolin [58,59], magnetic adsorbent [60,61], metal-organic framework [62], microorganisms [35][36][37], montmorillonite [63,64], and silica [65][66][67].…”