Metal-free high-adsorption-capacity adsorbent derived from spent coffee grounds for methylene blue

Abstract

Spent coffee grounds derived carbon was prepared for the adsorption of methylene blue in aqueous solutions.

Removal and Potential Recovery of Dissolved Metals from Acid Sulfate Soil Drainage by Spent Coffee-Grounds and Dissolved Organic Carbon

“…Multiple mechanisms could explain the decreasing adsorption of soluble Fe with higher SCGs addition. The adsorption times used in this study are higher than in previous SCGs adsorption studies (Lavecchia et al 2016;Nam et al 2017;Sukhbaatar et al 2021), which could cause desorption. However, Kyzas et al (2012) reports the adsorption of soluble metals onto SCGs under experimental adsorption times up to 24 h, which do not indicate desorption of soluble metals from the SCGs.…”

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

“…It was observed that the adsorption capacity increased with pH such that maximum absorbance quotient was obtained at pH 10 due to enhanced electrostatic interactions between MB molecules and oxygencontaining functional groups on the adsorbent surface introduced by KOH-NaOH activation. 260 Biomass/waste-derived porous carbons have also been explored for mixed dyes removal from wastewater. Wu et al reported high adsorption capacity of two kinds of organic dyes, congo red (404.4 mg g À1 ) (CR) and MG (2468 mg g À1 ) on activated porous carbon derived from HTC processed litchi peel.…”

“…It was observed that the adsorption capacity increased with pH such that maximum absorbance quotient was obtained at pH 10 due to enhanced electrostatic interactions between MB molecules and oxygen-containing functional groups on the adsorbent surface introduced by KOH–NaOH activation. 260…”

Fabrication of Biochar Materials from Biowaste Coffee Grounds and Assessment of Its Adsorbent Efficiency for Remediation of Water-Soluble Pharmaceuticals

“…Many researchers have explored the adsorption capacity of biowaste coffee grounds for potential applications in wastewater remediation [13][14][15][16]. Lots of food waste that find its way into municipal sewage can pose major environmental risks to public health.…”