low-cost Bio-Adsorbent based on Amorphous Carbon Thin Film/chitosan composite for removal of Methylene Blue Dye: Kinetic and Isotherm

Abstract

I N this article, we focused on using low-cost bio-adsorbents such as chitosan from shrimp & crabs shells waste, and amorphous carbon thin film ACTF from microcrystalline cellulose waste, to prepare a new composite (ACTF/C) for removal of methylene blue (MB) dye from aqueous solution. ACTF/C composite was prepared via a novel ultrasonic co-precipitation method instead of traditional chemical vapor deposition (CVD) method. The morphological and structural descriptions are performed using XRD, FTIR, TEM, TGA, SAED and SEM analysis. The analysis results showed that the ACTF/C composite was prepared successfully. The effects of several parameters such as adsorbent doses (0.05-0.2 g/100 ml), temperatures (25-45 o C), initial solution pH of solution (3-9) , dye concentrations (10,25, 50, and 100 ppm) and contact time (20-80 min) on the adsorption process were examined. The kinetics, thermodynamic analyses, and adsorption isotherm models were examined to estimates the empirical results. The empirical facts are properly equipped with the Langmuir isotherm (R 2 = 0.997), giving an absorption capacity of more than 85mg/g. From kinetic details, we found that adsorption of methylene blue day across ACTF/C composite is represented by the pseudo-secondorder model. In general, these outcomes suggest that the new ACTF/C composite provides great potential to get rid of methylene blue dye from contaminated water.

Modified Orange Peel Waste as a Sustainable Material for Adsorption of Contaminants

“…Adsorption is a simple, low cost, and eco-friendly physical remediation method. Different adsorbents, including synthetic, natural inorganic, and natural organic sorbents, have been applied in removing various contaminants from environmental media [ 1 , 2 ]. Synthetic adsorbents are the most extensively used sorbents; studies have shown they have high hydrophobic and oleophilic properties and can sorb up to 70 times their weight in water.…”

“…Furthermore, they can be used several times after recovery; however, they are expensive and are usually nondegradable [ 3 ]. Natural inorganic adsorbents have low sorption capacities 4–20 times the weight of the adsorbent with little buoyancy, thus they have less application in environmental clean-up [ 2 , 4 , 5 ]. Conversely, natural organic adsorbents are carbon-based biomass materials derived from plants or animals and are mostly found in the form of agricultural wastes.…”

Performance and Mechanism of Modified Orange Peel as a Highly Efficient Adsorbent for Lead(II) and Mercury(II) Removal from an Aqueous Solution

“…Moreover, they can be used several times after healing; however, they are expensive and generally not degradable [2] . Natural inorganic adsorbents have a low adsorption capacity of 4–20 times the weight of the adsorbent and have little buoyancy, so they have less application in environmental cleaning [3–5] . In contrast, natural organic adsorbents are carbon‐based biomass materials derived from plants or animals and are mostly found in the form of agricultural waste.…”

“…[2] Natural inorganic adsorbents have a low adsorption capacity of 4-20 times the weight of the adsorbent and have little buoyancy, so they have less application in environmental cleaning. [3][4][5] In contrast, natural organic adsorbents are carbon-based biomass materials derived from plants or animals and are mostly found in the form of agricultural waste. They are produced from renewable resources that are non-toxic, non-corrosive, fully active in recycling, and cost-effective.…”