Adsorption of methyl violet from aqueous solutions by the biochars derived from crop residues

Synthesis, characterization and adsorption studies of an acrylic acid-grafted sodium alginate-based TiO2 hydrogel nanocomposite

“…The adsorption capacities of different adsorbents for MV are listed in Table 2. It can be found that SA-g-PAA/TiO 2 absorbent is more efficient compared to those reported in previous literature (Bhattacharyya and Ray, 2014; 2013; Ghorai et al, 2014;Liu et al, 2011;Maity and Ray, 2014;Mandal and Ray, 2014;Mittal et al, 2015;Tian et al, 2010;Xu et al, 2011). This result indicates that SA-g-PAA/ TiO 2 hydrogel nanocomposite can be regarded as promising material for the MV removal from aqueous solution.…”

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

“…Most of the chars derived from many sources have been found to exhibit good performance for basic dyes (Table 1). However, the bamboo biochar in this study exhibited a high adsorption capacity for acid dye and was found to be comparable to those of many corresponding chars from rice straw, sewage sludge and crop residues (Hameed and El-Khaiary 2008;Jindarom et al 2007;Xu et al 2011). …”

“…Biochar is produced by the combustion of biomass under limited oxygen conditions. Biochar is a fine-grained and porous substance and has been applied recently to remove dyes from aqueous solutions (Mahmoud et al 2012;Qiu et al 2009;Xu et al 2011). The effects of manufacturing the parameters of biochar on dye removal were discussed in detail in the literatures, such as heating rate, carbonization temperature and carbonization time and so on (Demirbas 2009;Mui et al 2010a, b;Wang and Yan 2011).…”

Adsorption of anionic and cationic dyes on biochars, produced by hydrothermal carbonization of waste biomass: effect of surface functionalization and ionic strength

“…The adsorption of ionic dyes from aqueous solution is dependent on various factors such as structure and functional behavior of the biochars, mass transport, and electrostatic interactions. 40,41 Furthermore, it has been reported that the adsorption mechanism depends on the π -π * interactions between aromatic regions of the dye molecules and graphene-like sheets of carbon-based adsorbents. 42,43 To prove the existence of π -π * interactions in the biochars, XPS analysis is 91 Ç AGLAR et al/Turk J Chem performed ( Figure S2 in Supplementary Information).…”