Sustainable high-efficiency removal of cationic and anionic dyes using new super adsorbent biochar: performance, isotherm, kinetic and thermodynamic evaluation

Abstract

A green, environment-friendly, inexpensive non-modified biochar was employed for removal of unparalleled pH sensitive cationic and anionic dyes from wastewater.

Efficient dye adsorption of mesoporous activated carbon from bamboo parenchyma cells by phosphoric acid activation

“…At simultaneously, the deprotonation of the hydroxyl and carboxyl functional groups released more adsorption sites, and electrostatic attraction between the negative charges on the activated carbon-surface and the dye cations was generated, facilitating the adsorption of MB. 33,34…”

“…At simultaneously, the deprotonation of the hydroxyl and carboxyl functional groups released more adsorption sites, and electrostatic attraction between the negative charges on the activated carbon-surface and the dye cations was generated, facilitating the adsorption of MB. 33,34 To examine the association between the adsorption of MB by PPAC-30C and the dosage of activated carbon, the adsorption behaviour, and the removal rate of MB at different dosages of PPAC-30C were investigated. As illustrated in Fig.…”

Multifunctional MgAl LDH/Zn-MOF S-scheme heterojunction: efficient hydrogen production, methyl red removal, and CO2 adsorption

“…Essentially, the pHpzc value of an adsorbent indicates the pH at which the adsorbent surface has no net charge. 41 When the number of positive and negative charges are equal, an adsorbent's surface reaches a zero point of charge (PZC), meaning it has no preference for attracting either positively or negatively charged substances. To determine the PZC, pH initial vs pH final plot is done and the point of intersection is identified, which is 7.1 in Fig.…”

Functionalization of Shorea faguetiana biochar using Fe2O3 nanoparticles and MXene for rapid removal of methyl blue and lead from both single and binary systems

“…It is widely used in a number of different applications, especially the adsorption of pollutants from aqueous solutions. 79 The Elovich model exhibited practical suitability in tting the kinetic experimental data for Pb 2+ and MB (R 2 = 0.996 and 0.991, respectively) (Fig. S3(a) †).…”