Biosorbent For Removal Of Dyes Research Articles

Sustainable Biochar Carbon Microparticles Based on Mangosteen Peel as Biosorbent for Dye Removal: Theoretical Review, Modelling, and Adsorption Isotherm Characteristics

Environmental problems and global energy demand increase every day. The quality of water and sanitation is a very hot topic of discussion. The principles of sustainable development (SDGs) by utilizing renewable materials need to be applied to overcome this problem. One way is through the use of agricultural waste as a renewable carbon material. The study aims to analyze the adsorption characteristics of sustainable carbon microparticles based on mangosteen peel for dye removal. This study also evaluates adsorption isotherms based on its microparticle size effects. In short, carbon preparation was started by mangosteen peel carbonization at 250˚C for 5 hours and tested using sieves (i.e., 125, 250, 500, 1000, and 2000 μm) to obtain a certain size of carbon. Adsorption was evaluated based on a specific particle size using a batch adsorption reactor. Curcumin was used as a model organic dye. The findings showed that particle sizes influence physical adsorption with repulsive interactions between adsorbates. Adsorption in the large particles (i.e. 2000 and 1000 μm) occurs in the multilayer adsorption process with pore filling, while that in the small particles (i.e., 500 μm) occurs in the monolayer adsorption process with pore filling. Small-sized carbon does not provide enough active sites (such as the absence of a pore structure on the surface) for the adsorbate, leading to the creation of a monolayer during adsorption. Meanwhile, in large-sized carbon, the pore-filling mechanism in the adsorbent surface cause the formation of multilayer adsorption. This research is important to understand the application of adsorption using agricultural waste-based adsorbents by observing the phenomena occurring during the adsorption process.

Valorization of waste pine needle biomass into biosorbents for the removal of methylene blue dye from water: Kinetics, equilibrium and thermodynamics study

This work demonstrates sustainable valorization of pine needle biomass as a biosorbent for dye removal. Pine needle biomass was prepared by pyrolysis at 550 °C and functionalized by treating with a mixture of strong acids (sulphuric acid and nitric acid) and a mixture of weak acids (acetic acid and phosphoric acid) to obtain activated biochar. The influence of acid activation on biochar was studied by ultimate and proximate analyses, surface morphology, and textural properties. The adsorption potential of native and acid-activated biochar was studied for the removal of cationic dye methylene blue from an aqueous solution. Results indicate that acid activation increased the carbonyl functional groups on the biochar surface. Treatment with strong acids led to an increased surface area (217 m2g−1) in comparison to weak acid (173 m2g−1) and native biochar (164 m2g−1). The adsorption isotherm was best fitted with the Langmuir model (R2 > 99) and the adsorption kinetics followed the pseudo-second-order model. Thermodynamic parameters revealed that the process was endothermic and spontaneous. The maximum adsorption capacity was observed to be 106.38, 153.84, and 113.63 mg g−1 for native, strong, and weak acid-treated biochar respectively. Strong acid-treated biochar retained more than 60% dye removal rate after five cycles. The adsorption mechanism appeared to be governed by the co-existing phenomenon of hydrogen bonding (between nitrogen on dye and hydroxyl group on biochar surface), electrostatic interaction (between charged moieties of dye and reactive oxygen on biochar surface), and aromatic interactions between the benzene rings of dye and biochar surface.

Chicken Feathers as Biosorbent for Dye Removal: Kinetic and Isotherm Studies

Chicken Feathers as Biosorbent for Dye Removal: Kinetic and Isotherm Studies

Removal of acid black 1 by Acacia Concinna; adsorption kinetics, isotherm and thermodynamic study

In the present research, batch adsorption of anionic dye such as Acid Black 1 (AB1) in aqueous solution onto biosorbent Acacia concinna was investigated at room temperature. The effect of various physico-chemical parameters such as contact time, adsorbent dosage, initial dye concentration and temperature on the percentage removal of dye were investigated. Adsorption kinetics was investigated using linear and nonlinear form of pseudo first-order and pseudo-second-order kinetic models but experimental data for adsorption of AB1 dye in aqueous mixture onto biosorbent Acacia concinna was fitted well to pseudo-second order model with maximum value of regression coefficient (0.9995). Linear and nonlinear forms of Langmuir, Freundlich, Tempkin, and Dubinin– Radushkevich (D–R) were used to reveal experimental data but experimental data for adsorption of AB1 dye in aqueous mixture onto biosorbent Acacia concinna fitted well to the Langmuir isotherm model with adsorption capacity 3.21✕10-4 Adsorption thermodynamic study showed that adsorption of AB1 dye onto adsorbent Acacia concinna was endothermic and spontaneous process. This study revealed that biosorbent Acacia concinna was good biosorbent for removal of dyes from aqueous solution.

Removal of acid black 1 by Acacia Concinna; adsorption kinetics, isotherm and thermodynamic study

In the present research, batch adsorption of anionic dye such as Acid Black 1 (AB1) in aqueous solution onto biosorbent Acacia concinna was investigated at room temperature. The effect of various physico-chemical parameters such as contact time, adsorbent dosage, initial dye concentration and temperature on the percentage removal of dye were investigated. Adsorption kinetics was investigated using linear and nonlinear form of pseudo first-order and pseudo-second-order kinetic models but experimental data for adsorption of AB1 dye in aqueous mixture onto biosorbent Acacia concinna was fitted well to pseudo-second order model with maximum value of regression coefficient (0.9995). Linear and nonlinear forms of Langmuir, Freundlich, Tempkin, and Dubinin– Radushkevich (D–R) were used to reveal experimental data but experimental data for adsorption of AB1 dye in aqueous mixture onto biosorbent Acacia concinna fitted well to the Langmuir isotherm model with adsorption capacity 3.21✕10-4 Adsorption thermodynamic study showed that adsorption of AB1 dye onto adsorbent Acacia concinna was endothermic and spontaneous process. This study revealed that biosorbent Acacia concinna was good biosorbent for removal of dyes from aqueous solution.

Saccharum ArundinaceumLeaves as a Versatile Biosorbent for Removal of Methylene Blue Dye from Wastewater

Powdered Saccharum arundinaceum leaves (PSAL) are an agricultural waste and are abundantly available for use as a versatile, low-cost biosorbent for removal of dyes from wastewater in manufacturing...

Chemically modified sugarcane bagasse as a biosorbent for dye removal from aqueous solution

The use of adsorbent prepared from sugarcane bagasse, an agro waste from sugar industries has been studied as an alternative substitute for activated carbon for the removal of dyes from aqueous solution. Adsorbents prepared from sugarcane bagasse modified with citric acid was used as a low-cost biosorbent for removal of dyes from the aqueous solution. Adsorption parameters such as initial pH values, dyes concentrations, adsorbent dosages and contact times were investigated by the batch experiments. The Freundlich and Langmuir adsorption isotherm models were used to evaluate the experimental data. The results showed that the adsorption process of dyes onto the modified sugarcane bagasse leaned towards Langmuir model for MSB and Freundlich for SB. Maximum adsorption capacity of MSB was found to be 8.40 mg/g at pH 9. The results showed that the modified sugarcane bagasse with citric acid could be a potential low-priced adsorbent for removal of the color from the aqueous solution.

Removal of rhodamine 6G from synthetic effluents using Clitoria fairchildiana pods as low-cost biosorbent.

Many organic dye pollutants have been identified in rivers and lakes around the world, and concern is growing with them as they cause serious changes in the ecological balance of aquatic environments. One of these dyes is rhodamine R6G, which is very water-soluble and has a high corrosive power. Therefore, Clitoria fairchildiana (CF) pods were used as a biosorbent to remove R6G from synthetic dye effluents. CF was characterized by infrared spectroscopy, thermogravimetric analysis, x-ray diffraction, elemental analysis, Boehm titration, and zero charge point measurements. The influence of various factors, such as solution pH, contact time, adsorbent mass, and concentration of R6G, was studied using batch equilibrium experiments. The optimum contact time to reach equilibrium was found to be 15min, while the optimum adsorbent dose was 8gL-1. The maximum adsorption capacity of CF (73.84mgg-1) was observed at pH6.4 and 298.15K. Adsorption kinetics followed a pseudo-second-order law, and the isotherm could be best fitted with a Liu model. The obtained thermodynamic parameters indicate that the adsorption of R6G is spontaneous and enthalpy-driven. We thus conclude that CF is an efficient, green, and readily available biosorbent for dye removal from wastewater.

Treatment of Dye Containing Real Industrial Effluents using NaOH-Activated Ficus racemosa and Prunus dulcis based Novel Adsorbents

The present study aims at evaluating the potential of synthesized biosorbents using NaOH-activated dead leaves of Ficus racemosa (NTFR) and Prunus dulcis (NTPD) for the treatment of real industrial effluents containing dyes. Kinetic and isotherm studies have been performed to establish the important design-related information for the treatment of industrial effluent using synthesized biosorbents. The extent of dye removal obtained as 99.19% for the studies involving pure dye solution of Acid Blue 25 dye with 50 mg L−1 as initial concentration using NTFR biosorbent was found to decrease marginally to 96.72% in the case of real effluent with similar dye loading and under similar operating conditions. Biosorption capacity for the case of pure Acid Blue 25 dye solution obtained as 83.33 mg g−1 also marginally decreased to 80.65 mg g−1 for the industrial effluent. Similarly, for the case of Acid Green 25 dye, extent of dye removal obtained as 92.09% was found to decrease to 84.51% in the case of mixed industrial effluent. In this case, reduction in chemical oxygen demand (COD) was also measured and compared with that of pure Acid Green 25 dye solution. COD reduction was obtained as 53.97% at the optimized dose of 18 g/L of NTPD for mixed industrial effluent which was lower than 92.05% obtained at the optimized biosorbent dose for pure Acid Green 25 dye solution. Langmuir and pseudo-second-order model fitted well to the obtained data in the present study. The obtained results confirmed potential of synthesized biosorbents for removal of dyes from industrial effluent and also established the influence of other compounds present in the industrial effluent on removal rate of individual dyes.

Dextran-graft-poly(hydroxyethyl methacrylate) biosorbents for removal of dyes and metal cations

Dextran-graft-poly(hydroxyethyl methacrylate) gels were prepared and used as a biosorbent for removal of dyes and heavy metal cations. For this propose, the effects of three main parameters during the preparation of gels including concentrations of monomer (hydroxyethyl methacrylate), the crosslinking agent (N,N’-methylenebisacrylamide (MBA)) and initiator (ammonium persulfate) on their swelling and absorbability of dyes and heavy metal cations were investigated. Methylene blue (MB) and rose bengal (RB) as model dyes and Fe(III) and Cu (II) as model metal cations were selected. Increasing the poly(hydroxyethyl methacrylate) content within the gels resulted in higher Equilibrium water absorption (EWA) values and consequently better dye and cation adsorption. Higher concentration of MBA led to lower dye adsorption values. Increasing the ammonium persulfate (APS) concentration did not change significantly the dyes and metal cations adsorption. The results indicated that this biosorbents system could be potentially used in the removal of heavy metal and dye from wastewater.

Study of Biosorbents for Removal of Dyes and Metals

Study of Biosorbents for Removal of Dyes and Metals

Fish (Labeo rohita) scales as a new biosorbent for removal of textile dyes from aqueous solutions

The feasibility of utilizing fish scales as a new biosorbent for removal of textile dyes, namely crystal violet (CV) and methylene blue (MB), from their aqueous solutions was investigated in a batch system. Experiments were conducted as a function of initial solution pH (2–10), contact time (0–180 min), biosorbent dose (0.5–5 g) and temperature (293–313 K). The Langmuir isotherm model showed excellent fit to the equilibrium biosorption data of both CV and MB. The maximum dye biosorption capacity of fish scale was calculated as 74.39 and 58.67 mg g−1 for CV and MB, respectively, at 313 K. Biosorption phenomena of CV and MB by fish scales followed pseudo-second-order kinetics. Activation energy calculated by using the Arrhenius equation suggested the chemisorption nature of the biosorption processes. A thermodynamic assessment indicated the spontaneous and endothermic nature of biosorption of the textile dyes. It could be concluded that fish scales may be used as an inexpensive and effective biosorbent for removal of dyes from aqueous solutions.

A novel biosorbent for dye removal: Extracellular polymeric substance (EPS) of Proteus mirabilis TJ-1

This paper deals with the extracellular polymeric substance (EPS) of Proteus mirabilis TJ-1 used as a novel biosorbent to remove dye from aqueous solution in batch systems. As a widely used and hazardous dye, basic blue 54 (BB54) was chosen as the model dye to examine the adsorption performance of the EPS. The effects of pH, initial dye concentration, contact time and temperature on the sorption of BB54 to the EPS were examined. At various initial dye concentrations (50–400 mg/L), the batch sorption equilibrium can be obtained in only 5 min. Kinetic studies suggested that the sorption followed the internal transport mechanism. According to the Langmuir model, the maximum BB54 uptake of 2.005 g/g was obtained. Chemical analysis of the EPS indicated the presence of protein (30.9%, w/w) and acid polysaccharide (63.1%, w/w). Scanning electron microscopy (SEM) images showed that the EPS with a crystal-linear structure was whole enwrapped by adsorbed dye molecules. FTIR spectrum result revealed the presence of adsorbing groups such as carboxyl, hydroxyl and amino groups in the EPS. High-molecular weight of the EPS with more binding-sites and stronger van der Waals forces together with its specific construct leads to the excellent performance of dye adsorption. The EPS shows potential board application as a biosorbent for both environmental protection and dye recovery.