Acid-factionalized biomass material for methylene blue dye removal: a comprehensive adsorption and mechanism study

Abstract

Coconut (Cocos nucifera) shell was chemically treated with sulfuric acid (H2SO4) to produce acid-factionalized biosorbent for methylene blue (MB) dye removal from aqueous environment. Various analytical techniques were utilized to investigate the surface area, surface morphology, crystallinity, elemental composition, and functional group of the sulfuric acid-treated coconut shell (SATCS). The adsorption parameters such as adsorbent dosage (0.02-0.20 g), solution pH (3-10), contact time (0-360 min), and initial MB dye concentration (25-200 mg/L) were studied. The adsorption results were illustrated by pseudo-second order kinetic and Freundlich isotherm models. It was found that SATCS has a maximum adsorption capacity (q max) of 50.6 mg/g at 303 K. The adsorption mechanism of MB dye on the SATCS surface can be assigned to the various types of interactions such as electrostatic attractions, H-bonding interaction, and π-π interaction. This work shows SATCS as promising acid-factionalized biosorbent for removal MB dye.

Methylene Blue Removal Using Coconut Shell Biochar Synthesized Through Microwave-Assisted Pyrolysis

“…It denotes that the pores were locked by the methylene blue molecule, indicating the effectiveness of the adsorption process of methylene blue on the biochar surface. This phenomena agrees with the work of Jawad et al [34].…”

“…This phenomenon occurred due to the adsorbentadsorbate interaction [32,33]. The hydroxyl (OH) and carbonyl (C = O) found on the biochars surface possibly involved in the methylene blue adsorption mechanism [34].The reduction of peak intensity can also be associated to the degradation of hemicelluloses structure [35].…”

Biossorção de Azul de Metileno empregando serragem do gênero Apuleia Leiocarpa

“…Vários materiais adsorventes estão sendo utilizados para a remoção de vários tipos contaminantes, incluindo os efluentes têxteis (Guimarães et al, 2020). São exemplos de biosorventes: casca de coco (Jawad et al, 2020), casca de frutas cítricas (Aichour et al, 2019); bagaço de cana de açúcar (Jorge et al, 2015;Buthiyappan et al, 2019), resíduo de algodão (Charola et al, 2018), casca de arroz (Salem et al, 2018) e palha de milho (Ismail eta al., 2019), pó de serragem (Müller, 2016;Agarwal et al, 2016), casca de banana (Almeida & Santos, 2020) entre diversos outros trabalhos de pesquisa.…”

Tillandsia Aeranthos flower‐like magnetic nanostructures confined into polyvinyl alcohol beads

“…Living organisms health could be damaged in many different ways, 8–18 even altering complete ecosystems 19 . In particular, the cationic dye methylene blue (MB) is found to be causing asthma, heart rate increasing, nausea, vomiting, skin irritation, and diverse eyes damages including permanent blindness 20–23 . On the other hand, among the most commonly found anionic dyes is the azo derivative compound methyl orange (MO) and its most outstanding permanent potential damages include their capability to act as both mutagenic and carcinogenic agent 24,25 …”

“…19 In particular, the cationic dye methylene blue (MB) is found to be causing asthma, heart rate increasing, nausea, vomiting, skin irritation, and diverse eyes damages including permanent blindness. [20][21][22][23] On the other hand, among the most commonly found anionic dyes is the azo derivative compound methyl orange (MO) and its most outstanding permanent potential damages include their capability to act as both mutagenic and carcinogenic agent. 24,25 Dye pollutants sources are usually related to wastewaters from the dying, printing and textile industries.…”