Biosorption of lead(II) from aqueous solution on glutaraldehyde cross‐linked chitosan beads

Abstract

The ability of glutaraldehyde cross-linked chitosan beads (GCC beads) as synthetic adsorbent for adsorptive removal of Pb(II) ions from aqueous solutions is investigated in the present study. The biosorbent has been characterised by Brunner, Emmett, and Teller (BET) analysis, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques. Equilibrium and column flow adsorption characteristics of Pb(II) ions on the biosorbent were studied. The effects of experimental variable parameters such as pH, concentration of metal ion, amount of adsorbent, contact time, temperature and interfering ions on adsorption have been investigated. The equilibrium data are fitted to pseudo-first order, pseudosecond order, fractionary order, chemisorption, Weber-Morris and Boyd models. Based on R 2 and error function values, it is observed that the kinetic data are better fitted to pseudo-second-order kinetic model and chemisorption model. The experimental data are analysed using Langmuir, Freundlich, and Sips adsorption isotherm models. The monolayer adsorption capacity of GCC beads as obtained from Langmuir isotherm at 35 • C is found to be 204.0 mg/g. The thermodynamic constants of the adsorption process: H 0 , S 0 and G 0 are evaluated. The results show that biosorption of Pb(II) ions on GCC beads are endothermic and spontaneous.Cetteétude examine la capacité de perles chitosanes réticulées de glutaraldéhyde (perles GCC) comme adsorbant synthétique pour l'élimination adsorptive des ions As (

Modified leaf biomass for Pb(II) removal from aqueous solution: Application of response surface methodology

“…Research in the area of water treatment suggests that biosorption is an alternative for decontamination of effluents containing heavy metals. In recent years a number of cost effective and abundant biosorbents like modified chitosan Siva Kumar et al, 2010;Suguna et al, 2011), fungi , agricultural waste materials (Kadirvelu and Namasivayam, 2003;Suopajarvi et al, 2014;Naiya et al, 2009), plant leaves (Salim et al, 2008;Bhattacharyya et al, 2009;Qaiser et al, 2009) have been used for the removal of metals as well as organic matter from aqueous environment.…”

Synthesis of Pb(II) Imprinted Carboxymethyl Chitosan and the Application as Sorbent for Pb(II) Ion

“…(M1/M2) = DM1/DM2 (6) where distribution ratio D = Q/C e , Q is adsorption capacity (mmol/g), C e is the adsorbate concentration in the aqueous phase at equilibrium (mmol/L), and  is selectivity coefficient. [37].…”

“…Lead (Pb(II)) is attracting wide attention of environmentalist as one of the most toxic heavy metals. The major sources of Pb(II) are industries of the smelting of iron and steel, battery, the metal coating, paint, color/textile, and electrical wiring [4][5][6]. Current treatments to remove metal ions from contaminated water are mostly based on ion-exchange, reversed osmosis, liquid extraction, electrolysis, adsorption, complexation, and precipitation.…”

“…Chitosan has several disadvantages when used directly as an adsorbent such as its dissolve in acidic solution, prone to swelling, weak mechanical stability and small adsorption capacity for certain metal ions [4]. Chitosan can be modified by cross-linking [6], immobilizing into a matrix support [11] and blending [12] to make chitosan that stable in acid and has good mechanical properties. The cross-linking procedure may be performed by reaction of chitosan with different reagent such as epichlorhydrin (ECH) [13] glutaraldehyde (GLA) [14][15] and EGDE (16)(17)(18).…”

Preparation of Pb(II)-Carboxymethyl Chitosan Pec PEGDE Film as Selective Asorbent for Removal Pb(II) Ion

“…Chitosan as an heavy metal adsorbent is very high capability however its ability limited because of the weakness such as swelling, unsatisfying mechanical properties and solubility in acidic condition 7,8 . Chitosan modified by crosslinking 9 , immobilizing into a matrix support 10 and blending 11 to form it stable on acid media and has good mechanical properties. To solve these problems, chemically crosslinked chitosan has be required.…”