Effect of impregnation ratio and activation temperature on the yield and adsorption performance of mangrove based activated carbon for methylene blue removal
“…This result is consistent with the literature. Most adsorption studies of crystal violet and methyl blue dyes have been reported to fit well with the Langmuir isotherm model [10,20,21].…”
Section: Discussionmentioning
confidence: 89%
“…Therefore, the Langmuir isotherm model was the best fit for the adsorption mechanism based on its highest R 2 value of 0.98. Therefore, the adsorption process was homogeneous monolayer adsorption [7,10]. The equilibrium adsorption capacity was 13.53 mg/g, and the Langmuir constant was negative with a value of -1.40 l/mg.…”
Section: Resultsmentioning
confidence: 99%
“…Activated carbon is porous, a carbonaceous material having significant surface area activities for the adsorption of sorbate molecules. Internal pore structure and active sites dominated surfaces of oxygenated functional groups [8][9][10]. Activated carbon is applied in most industrial water treatment processes such as water treatment plants and municipal waterworks stations.…”
The need to develop effective technology for the treatment of liquid effluent of dye-intensive industries such as textile, rubber, paint, and printing is synonymous with the need to save the life-threatening risks posed by these carcinogenic and mutagenic pollutants on human and aquatic lives. Isotherms of adsorption of crystal violet (CV) on activated carbon (AC) synthesized from rice husk are presented herewith to elucidate the mechanism of the adsorption process of crystal violet dye contaminated water on rice husk activated carbon. AC was synthesized from rice husk via a phosphoric acid activating agent at low temperatures. Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D-R) isotherm studies were employed. The mean square values for Langmuir, Freundlich, Temkin and D-R models were 0.98, 0.91, 0.94, and 0.63, respectively. Analysis of the isotherms of the adsorption of crystal violet sorbate on the synthesized rice husk sorbent suggested that the adsorption process proceeded via a homogeneous monolayer mechanism. Langmuir isotherm gave the best fit of the adsorption process. Langmuir isotherm constant was –1.40 l/mg, and the equilibrium adsorption capacity was 13.53 mg/g.
“…This result is consistent with the literature. Most adsorption studies of crystal violet and methyl blue dyes have been reported to fit well with the Langmuir isotherm model [10,20,21].…”
Section: Discussionmentioning
confidence: 89%
“…Therefore, the Langmuir isotherm model was the best fit for the adsorption mechanism based on its highest R 2 value of 0.98. Therefore, the adsorption process was homogeneous monolayer adsorption [7,10]. The equilibrium adsorption capacity was 13.53 mg/g, and the Langmuir constant was negative with a value of -1.40 l/mg.…”
Section: Resultsmentioning
confidence: 99%
“…Activated carbon is porous, a carbonaceous material having significant surface area activities for the adsorption of sorbate molecules. Internal pore structure and active sites dominated surfaces of oxygenated functional groups [8][9][10]. Activated carbon is applied in most industrial water treatment processes such as water treatment plants and municipal waterworks stations.…”
The need to develop effective technology for the treatment of liquid effluent of dye-intensive industries such as textile, rubber, paint, and printing is synonymous with the need to save the life-threatening risks posed by these carcinogenic and mutagenic pollutants on human and aquatic lives. Isotherms of adsorption of crystal violet (CV) on activated carbon (AC) synthesized from rice husk are presented herewith to elucidate the mechanism of the adsorption process of crystal violet dye contaminated water on rice husk activated carbon. AC was synthesized from rice husk via a phosphoric acid activating agent at low temperatures. Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D-R) isotherm studies were employed. The mean square values for Langmuir, Freundlich, Temkin and D-R models were 0.98, 0.91, 0.94, and 0.63, respectively. Analysis of the isotherms of the adsorption of crystal violet sorbate on the synthesized rice husk sorbent suggested that the adsorption process proceeded via a homogeneous monolayer mechanism. Langmuir isotherm gave the best fit of the adsorption process. Langmuir isotherm constant was –1.40 l/mg, and the equilibrium adsorption capacity was 13.53 mg/g.
“…The extra addition of water to concentrated phosphoric acid causes hydrolysis of cellulose to occur through an esterification reaction [ 92 ]. And according to the previous studies [ 93 ], the mechanism of the raw material activation utilizing phosphoric acid can occur in three steps indicated in Figure 3 . Figure 3 Mechanism of the biomass activation steps utilizing phosphoric acid.…”
Section: Methods Of Biomass Activation For the Synthesis Of Acmentioning
“…33 In the present study carbon yield of 46.36% was obtained after zinc activation. The H 3 PO 4 -activated mangrove pile and paulownia wood carbon showed a carbon yield of 44.7% 34 and 42%, 35 respectively. This suggests that the yield of carbon in the present study was comparable to the results reported in the literature.…”
BACKGROUND: Pharmaceuticals and personal care products (PPCPs) are growing families of chemicals that are regarded as emerging contaminants and are becoming a serious threat to the environment. Adsorptive removal of micropollutants has been extensively studied using activated carbons derived from agro-poultry waste biomass and byproducts. The non-sustainable resources and steep supply chain costs further accelerate the search for finding new renewable materials for adsorbent preparation. In the present study, the carbon prepared from Pleurotus floridanus biomass obtained as a value-added product from laccase production was used as an adsorbent for the removal of a nonsteroidal anti-inflammatory drug, namely piroxicam (PRX). RESULTS: The prepared carbon was activated using zinc chloride (ZAC) and showed an excellent Brunauer-Emmett-Teller surface area of about 285.1 m 2 g −1 . ZAC displayed a rapid adsorption capacity for PRX of about 6.08 mg g −1 with an adsorption equilibrium time of 90 min. Both Langmuir and Freundlich isotherm equations were best fitted to the experimental data. The results of kinetic studies were fitted best with pseudo-first-order kinetic models.Conclusions: Fungal biomass obtained as a value-added product of fermentation media can be converted into carbon, which is effective in adsorbing PPCPs such as PRX.
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