Fast adsorptive removal of methylene blue dye from aqueous solution onto a wild carrot flower activated carbon: Isotherms and kinetics studies

Abstract

a b s t r a c tIn the present study, adsorption of methylene blue (MB) dye from aqueous solution on to a wild carrot flower activated carbon (WCFAC) as a potential adsorbent was investigated. No attempt has been made in the past on WCFAC and it also finds application in reducing the population of this poisonous weed. WCFAC was prepared using simple chemical activation method and MB dye adsorption was studied by batch adsorption experiments. The effects of various parameters like dosage effect, effect of pH, initial concentration of the dye and contact time on the adsorption capacity of MB dye on WCFAC are reported. It was found that, maximum adsorption (~88%) was observed at pH 6 with a good sorption capacity (~21 mg/g) of dye. The adsorption isotherms are analyzed by Langmuir and Freundlich models. The sorption data were better fitted by the Freundlich isotherm model as evident from the R 2 value 0.940. Adsorption kinetics was performed and obeys pseudo-second-order kinetic model (R 2 at 0.9325). The zero point charge for the WCFAC was found to be 4.9 pH. pH optimization studies show that the favorable adsorption range ~4-6 pH. Experimental and kinetic results reveal that WCFAC is a potential adsorbent for the adsorption of MB dye from aqueous solution.

Adsorptive removal of methylene blue by chemically treated cellulosic waste banana (Musa sapientum) peels

“…In this regard, MB was chosen a typical cationic dye to figure out the adsorptive properties of the ATBP. Sulphuric acid (H 2 SO 4 ) is frequently used as a low cost activation agents for the preparation of carbonaceous adsorbents from ligno-cellulosic materials such as coconut leaf [32], mango peel [36], euphorbia rigida [42], bagasse [43], almond husk [44], parthenium hysterophorus [45], sunflower oil cake [46], pine-fruit shell [47], Delonix regia pods [28], wild carrot [48], Ficus carica [49] potato peel and neem bark [50].…”

Preparation, Characterization of Polyvinyl Alcohol/Activated Carbon (PVA/AC) Composite and the Removal of 4-Nitrophenol (4-NP)

“…Linear representation of Langmuir isotherm may be described by Eqn. (8). The Qmaxand b values were computed from the slopes and intercept of the linear plot of Ce/qe versus Ce in Fig.…”

“…The point of zero charge was determined by a reported procedure [8,9]. The procedure can be described as follows: to a series of 50 mL conical flasks, 30 mL of 0.1M NaCl solution was added.…”

“…The surface property can be determined as a multilayer or monolayer by using of adsorption isotherms. The Langmuir (8) and Freundlich (9) isotherm models are usually used to detect the adsorption isotherm.…”

Removal of nickel and methylene blue from aqueous solutions by steel slag as a low cost adsorbent

“…One of the high consuming materials in the dye industry is MB, which is the most commonly used substance for dying cotton, wool, and silk [4]. The MB can cause eye burns, nausea, vomiting, diarrhea, dyspnea, tachycardia, cyanosis, methemoglobinemia, and convulsions if inhaled [5,6]. Therefore, the treatment of effluent, containing heavy metal ions, and dyes such as nickel and MB, is necessary due to their harmful effects on humans.…”