Removal of Copper Ions and Methylene Blue from Aqueous Solution Using Chemically Modified Mixed Hardwoods Powder as a Biosorbent

Abstract

Citric acid modified mixed hardwoods powder (CMH) was prepared as a biosorbent to remove copper ions and methylene blue (MB) from aqueous solution by batch techniques. FT-IR and XRD were used to characterize the biosorbent. The effects of initial pH value, biosorption temperature, contact time, and initial adsorbate concentration on the biosorption capacities and adsorptivity of Cu 2+ and MB onto CMH were investigated. The results showed that CMH exhibited excellent biosorption characteristics for Cu 2+ and MB. The maximal biosorption capacity of Cu 2+ and MB onto CMH was 165.0 and 237.4 mg/g at 20 °C, respectively. The biosorption kinetics studies indicated that Cu 2+ and MB biosorption followed the pseudo-second-order model. The biosorption may be controlled by external intraparticle diffusion mass transfer during the whole biosorption process. Furthermore, the biosorption-equilibrium can be well described by Langmuir and Freundlich isotherm models.

Potential Biosorbent Derived from Calligonum polygonoides for Removal of Methylene Blue Dye from Aqueous Solution

“…The occurrence of peaks at about 793 shows the existence of Si–H [ 35 ]. The presence of adsorption band in region from 1300 to 900 cm −1 represents the carbonyl component (i.e., alcohols, esters, carboxylic acid, or ethers) [ 16 , 47 ]. The presence of absorbance peaks in region from 900 cm −1 shows O–H stretching vibrations which represented aromatic groups.…”

“…There are various physical and chemical methods used for removal of textile dyes from aqueous media. These include ion exchange, membrane filtration, electrochemical destruction, ozonation, flotation, chemical coagulation, biological and chemical oxidation, precipitation, and electrokinetic and adsorption methods [ 16 – 19 ]. However most of these methods have some major drawbacks, such as the applicability at relative high concentration of dye, insufficient dye removal, high cost and production of extra waste [ 20 ].…”

“…Presently cellulose and lignocellulosic biomass have got considerable attraction because of the abundance, effectiveness, low cost, and environmentally friendly nature of these biopolymers. Thus biosorption has been proved to be the most effective technique for the removal of MB from the aqueous solution [ 16 , 26 – 29 ].…”

Anisotropic polydopamine capsules with an ellipsoidal shape that can tolerate harsh conditions: efficient adsorbents for organic dyes and precursors for ellipsoidal hollow carbon particles

“…With the current ellipsoidal PDA capsules, an adsorption capacity of 200 mg g À1 was achieved during two hours, which is much higher than 90.7 mg g À1 of the pure PDA microspheres under the same conditions and is comparable with that of the chemically modied mixed hardwoods (237.4 mg g À1 ) (Table S1 in ESI †). 59 The mechanism of the excellent adsorption capability of PDA based materials for MB is attributed to the p-p stacking and electrostatic interactions. 44 Other physical parameter should play critical roles in such dramatic difference between hollow PDA capsules and solid microspheres.…”

Synthesis of Magnetic Lignin-Based Hollow Microspheres: A Highly Adsorptive and Reusable Adsorbent Derived from Renewable Resources

“…Organic dyes are widely applied by clothing manufacturer and dyeing industries. However, the presence of dyes in polluted water has a negative effect on photosynthetic rate of aquatic flora, and it could also cause a serious health threat to human beings and animals. , Therefore, the total or partial removal of organic dyes is vital for the treatment of effluent . Recently, various techniques for removal of dyes from wastewater have been reported, such as precipitation, adsorption, flocculation and biological processes.…”