Preparation of novel biochar containing graphene from waste bamboo with high methylene blue adsorption capacity

Ophiorrhiza mungos-Mediated Silver Nanoparticles as Effective and Reusable Adsorbents for the Removal of Methylene Blue from Water

“…The R 2 value is sufficiently close (>0.98) to 1, and the low value of RMSE from the Freundlich model also indicates that physisorption might have also taken place at the surface . In addition, the value of adsorption intensity ( n ), typically from 1 to 10, is indicated as the favorable condition for adsorption, and the high value of n in our case ( n = 3.726) is indicated as the favorable adsorptive condition and Om -AgNPs as a better adsorbent. , Even though the Temkin model (Figure c) is not best suited in our case, the high and positive value of the Temkin constant (A and b) represents a good binding affinity between Om -AgNPs and MB and the endothermic adsorption process . Interestingly, the Temkin constant related to the heat of sorption (B) value (9.007 J/mol) concluded that adsorption is governed by both physisorption and chemisorption .…”

“…In addition, the value of adsorption intensity ( n ), typically from 1 to 10, is indicated as the favorable condition for adsorption, and the high value of n in our case ( n = 3.726) is indicated as the favorable adsorptive condition and Om -AgNPs as a better adsorbent. , Even though the Temkin model (Figure c) is not best suited in our case, the high and positive value of the Temkin constant (A and b) represents a good binding affinity between Om -AgNPs and MB and the endothermic adsorption process . Interestingly, the Temkin constant related to the heat of sorption (B) value (9.007 J/mol) concluded that adsorption is governed by both physisorption and chemisorption . The R 2 value of the D–R model (Figure d) is far behind 1 (0.7860); nevertheless, the important adsorption energy ( E ) parameter value is very high (4004.564 kJ/mol), which is possibly due to chemisorption. , Therefore, considering the above findings, it can be anticipated that chemisorption and physisorption originated and played the key role, indicating cooperative multilayer adsorption.…”

“…In the literature, there are abundant reports explaining the adsorption nature of physisorption or chemisorption based on the different isotherm models; however, cooperative multilayer adsorption was rarely reported. 55,58 The present findings should be cautiously handled to commercialize our adsorbent as the isotherm model has few limitations even though it is used by many researchers. 29,32,39,40,44,50 On one hand, after observing much literature, only a few reports have been found based on the green-synthesized AgNPs-mediated adsorptive removal of MB dye, presumably suggesting poor understanding on this subject.…”

Polyaniline‐Coated Magnesium Ferrite Nanocomposite: Synthesis, Characterization, Fabrication Cost Analysis and Dye Sorption Behavior with Scale‐Up Design

“…A dye is a coloured material that is distinguished by its affinity of the surface, because it absorbs light at a specific wavelength in the visible spectrum [1] . According to chemical structure, dyes are classified as, azo, carbonyl, anthraquinone, styryl, cyanine, nitro, and sulfur dyes [2] . Due to rapid development of modern industries, dyes are considered as significant water pollutant [3] .…”

“…[1] According to chemical structure, dyes are classified as, azo, carbonyl, anthraquinone, styryl, cyanine, nitro, and sulfur dyes. [2] Due to rapid development of modern industries, dyes are considered as significant water pollutant. [3] Dye loaded effluents are mostly introduced into the environment through various industries such as paper, pharmaceutical, food, textile, paint, leather, and plastic industries [4] and their direct discharge into waterbodies cause various pollution into the environment because the majority of dyes are noxious and hazardous for animals and human health.…”