Equilibrium studies for the sorption of lead from effluents using chitosan

Ng, Jack; Cheung, Waiman; McKay, Gordon

doi:10.1016/s0045-6535(03)00223-6

Cited by 226 publications

(124 citation statements)

References 27 publications

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“…where C e is the equilibrium concentration of metal ions (mg/L), Q is the amount of metal ions adsorbed (mg/g), Q m is the maximum adsorption capacity of metal ions (mg/g), and b is the Langmuir adsorption equilibrium constant (L/mg) [55,56]. Figure 5 shows the dependence of the equilibrium concentration on the adsorbed amount of Cu 2?…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Kuras

Więckowska

2015

Polym. Bull.

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In this study, a new copper(II) ion-imprinted polymer (Cu(II)-IIP) was synthesized by the precipitation method. Itaconic acid, ethylene glycol dimethacrylate and 2,2 0 -azobisisobutyronitrile were used as functional, cross-linking monomer and a free-radical initiator, respectively. This polymer has been characterized on the basis of Fourier transform infrared spectroscopy and surface area measurements. The imprinted Cu(II) ions were completely removed from the polymer by leaching with the mixture of 0.1 M EDTA and 1 M HCl. The optimum pH for the adsorption of Cu(II) on to the polymer was 6. The selective performance of the polymer was compared to non-imprinted polymer (NIP) for the binary mixture Cu 2? /Ni 2? and Cu 2? /Zn 2? . The relative selectivity of Cu(II)-IIP was 12.8 and 32.4 times greater than that of NIP as compared with the Zn 2? and Ni 2? ions, respectively. At optimal pH value, the maximum static adsorption capacity of Cu(II)-IIP and NIP was found to be 14.8 and 4.08 mg/g, respectively.

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Section: Adsorption Kineticsmentioning

confidence: 99%

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Kuras

Więckowska

2015

Polym. Bull.

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“…The Freundlich adsorption isotherm is a nonlinear empirical formula (Chang et al 2003). Assuming that adsorption is happening on a non-homogeneous surface, with the increase in adsorption capacity, adsorption energy will logarithmically reduce to adsorption equilibrium (Ng et al 2003;Seader and Henly 2006). For the two aquatic plants, the adsorption isotherm equations of Cu, Cd, Pb and Zn are a better fit to the Freundlich model, which indicates the process of adsorption is not a simple mono-layer adsorption.…”

Section: Adsorption Isotherms and Adsorption Kineticsmentioning

confidence: 99%

“…Adsorption is the most common and widely used method. Activated carbon is a common adsorbent; however, the cost is enormous, and therefore cheaper, more accessible, environmentally friendly, and more efficient adsorbent materials are being studied (Ng et al 2003). Seaweed (Gupta and Rastogi 2008), mushroom harvest residues (Saeed et al 2005), pine bark, pine needles and leaves (Vazque et al 2007), modified chitosan, cassava, and loofah sponge (Saeed et al 2005), and saw dust (Yu et al 2001;Vinodhini and Das 2010) have been used as potential adsorbents in research studies.…”

Section: Introductionmentioning

confidence: 99%

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Deng

Liu

Zeng

et al. 2013

Int. J. Environ. Sci. Technol.

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Ruppia maritima and Echinodorus amazonicus were prepared in a dehydrated powder form. The characteristics and mechanisms of adsorption of heavy metals were studied under various pH values, reaction times, and heavy metal ion concentrations. The results showed that under different pH and reaction time conditions, heavy metal adsorption was leadThe adsorption of lead increased linearly with the lead concentration. For cadmium, zinc and copper, the adsorption was saturated when metal ion concentration exceeded 200 mg/L. When a Freundlich model was applied, R 2 values for the heavy metal adsorption by the aquatic plants mostly exceeded 0.9. The adsorption of heavy metal ions by these two aquatic plant powders was better explained by the Lagergren second-order equation than the first-order equation. From the Fourier Transform Infrared spectra, there was an adsorption peak at 2,115 cm -1 for R. maritima. The peak shape did not change with metal affiliation except there was a shift of peak wavelength before adsorption. The results indicate that the mechanism of heavy metal adsorption by the two species is not simply on the mono-molecular layer level, and that intra-particulate dispersal is the dominant process. Heavy metal pollution does not affect the basic chemical components, and major substances involved in heavy metal adsorption including carbohydrates, cell wall pectin, and protein functional groups.

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“…R ECENTLY, numerous approaches have been studied for developing more effective technologies, not only to reduce the amount of heavy metal wastewater but also to improve the quality of the treated effluent [1,2]. Among these approaches, adsorption is the most versatile and the most widely used method by far, in which activated carbon is the most commonly used adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Heavy Metals by Adsorbents from Food Waste Residue

FAN¹,

ZHANG²

2015

JRST

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Food waste residue is an intractable problem worldwide. The current study discussed the potential of adsorbents prepared from food waste residue (AFWR) for heavy metal removal from wastewater. The microstructure of AFWR was characterized, and kinetic studies on the simultaneous adsorption of Pb 2+ , Cu 2+ , Zn 2+ and Cd 2+ ions from aqueous solutions by AFWR were carried out. It was found that the adsorption of all heavy metals followed a pseudo-second-order kinetics, so that there was a competitive adsorption for Pb 2+ , Cu 2+ , Zn 2+ and Cd 2+ . According to the experimental results, the adsorption in competition beads with the heavy metals presented an order of Cu 2+ > Pb 2+ > Zn 2+ > Cd 2+ .

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Equilibrium studies for the sorption of lead from effluents using chitosan

Cited by 226 publications

References 27 publications

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Sorption of heavy metals from aqueous solution by dehydrated powders of aquatic plants

Adsorption of Heavy Metals by Adsorbents from Food Waste Residue

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