Adsorption of Ag, Cu and Hg from aqueous solutions using expanded perlite

Ghassabzadeh, Hamid; Mohadespour, Ahmad; Torab‐Mostaedi, Meisam; Zaheri, Parisa; Maragheh, Mohammad Ghannadi; Taheri, Hossein

doi:10.1016/j.jhazmat.2010.01.010

Cited by 162 publications

(75 citation statements)

References 26 publications

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“…However, other research has indicated that the metals might be removed by adsorption to the perlite [11]. In addition, it is very likely that the copper and zinc complex with the ligands in both the dolomite (carbonate species) and the gypsum (hydroxy and sulfate) [17].…”

Section: Discussionmentioning

confidence: 99%

“…At room temperature, the silicon and alumina atoms at the surface tend to keep their coordination with oxygen by attachment to monovalent hydroxyl groups (OH − ), creating adsorbent negative ions that bond with the metal ions [11]. Dolomite and gypsum adsorb metals from runoff by exchanging calcium and magnesium cations with metals including zinc and copper [3].…”

Section: +mentioning

confidence: 99%

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Long-Term Metal Retention Performance of Media Filter Drains for Stormwater Management

et al. 2015

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Stormwater runoff, a substantial source of nonpoint pollution, can be treated using Best Management Practices (BMPs), such as the Media Filter Drain (MFD). An MFD is a trench filled with an engineered media mix, usually with a grass overlay, that receives runoff from the paved roadway next to it. The MFD was shown to remove dissolved metals (zinc and copper), typical pollutants from vehicles and urban areas, which might negatively impact aquatic species in receiving waters, but its long-term effectiveness was not known. Existing media filter mixes of different ages were collected from two different sites in the Pacific Northwest of the United States. Columns made with these media mixes received concentrated copper and zinc loading to simulate accelerated aging for estimated total lifespans from 14 to 22 years of copper and zinc loading, with little or no decrease in sorption. Throughout the aging process, some columns were subjected to performance testing with higher levels of typical runoff concentrations and average concentration decreases from influent to effluent were found to be greater than 90% for both copper and zinc. Based on this study, the MFD's lifespan for zinc and copper treatment is significantly greater than the initial ten-year estimate.

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Section: Discussionmentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Long-Term Metal Retention Performance of Media Filter Drains for Stormwater Management

et al. 2015

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“…This result indicated that the sorption process was complex and involved more than one mechanism. Table 3 showed that the maximum adsorption capacities reported of different adsorbents for Ag + removal from aqueous solutions 3,17,21,24,36 . It was found that the CTS-MMT composite bead has a higher adsorption capacity than some other adsorbents.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Due to its excellent properties, for instance, malleability, ductility, electrical and thermal conductivity, corrosion and oxidation resistance, antimicrobial and luster, Silver has been extensively investigated for various uses in industrial activities including the production of mirrors, photographic films, electroplating, catalyst, antimicrobial material, batteries and electronic devices, and jewelry 3,4 . Therefore, all these industrial activities have been given the silver ion pollution in wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

Jintakosol

Nitayaphat

2016

Mat. Res.

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Chitosan/montmorillonite (CTS-MMT) composite beads were used as adsorbents for the removal of silver ion (Ag + ) from aqueous solution. Equilibrium adsorption was achieved within 150 min at 3% MMT of chitosan solution. The optimum pH value for Ag + removal was found to be 6-7. The maximum adsorbent dosage for Ag + removal was 5 g/L. Under above maximum conditions the Ag + removal was 95.7%. The maximum adsorption capacities of CTS and CTS-MMT composite beads as obtained from Langmuir isotherm were found to be 38.46 and 43.48 mg/g, respectively. The adsorption kinetic agrees well with the pseudo second order model. The Ag + desorption of CTS-MMT composite bead was 17.39% at pH=4. SEM/EDX images confirm that after adsorption the Ag + were dispersed onto the composite bead surface. The adsorption and desorption experiment demonstrated that the CTS-MMT composite beads can be used as an effective adsorbents for removal of Ag + from aqueous solution.

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“…It is apparent from Figure 4 that by increasing the resin amount, the adsorption efficiency increases but adsorption density, the amount adsorbed per unit mass, decreases. It is readily understood that the number of available adsorption sites increases by increasing the adsorbent amount but the drop in adsorption capacity is basically due to the sites remaining unsaturated during the adsorption process (Olgun and Atar, 2011, Ghassabzadeh et al, 2010, Ngah and Fatinathan, 2010, Hanafiah et al, 2009). …”

Section: Effect Of Adsorbent Dosage On Adsorption Of Ni(ii) Ionsmentioning

confidence: 99%

Physicochemical studies

Guthrie¹

1969

Carbohydrate Chemistry

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A modified suspension polymerization was used for the preparation of the mesoporous magnetic-poly(divinylbenzene-co-vinylimidazole) (m-poly(DVB-VIM)) microbeads in size 53-212 μm of average diameter. The specific surface area and the DVB/VIM mol ratio of the microspheres were determined as 29.47 m 2 /g and 1:4 mol/mol with Fe 3 O 4 , respectively. The physicochemical studies of adsorption of Ni(II) ions from aqueous solutions such as pH, initial concentration, amount of mesoporous m-poly(DVB-VIM) microbeads, contact time, and temperature onto the m-poly(DVB-VIM) microspheres were carried out. The maximum adsorption capacities of the m-poly(DVB-VIM) microspheres towards Ni(II) ions were determined as 13.51, 20.14, 21.00 and 23.62 mg/g at 277 K, 298 K, 318 K, and 338 K, respectively. The dynamic and equilibrium adsorption behaviours of the system were adequately described by the pseudo-second-order kinetic and the Langmuir isotherm models, respectively. Various thermodynamic parameters, such as the Gibbs' free energy change (ΔG o ), the standard enthalpy change (ΔH o ) and the standard entropy change (ΔS o ) were also determined. Morever, after use in the adsorption, the m-poly(DVB-VIM) microbeads with paramagnetic property was separated from the via the applied magnetic force. These results indicate that the material studied could be used as a purifier for the removal of Ni(II) ions from water and wastewater under magnetic field.Keywords: Magnetic polymers; Adsorption isotherm; Adsorption kinetic; Adsorption thermodynamic; Ni(II) ions. R L the dimensionless separation factor k 1 the rate constant of pseudo first-order adsorption (min -1 ) k 2 the rate constant of pseudo second-order adsorption ((g/mg) min -1 ) k R the rate constant for the modified Ritchie's-second-order model (min -1 ) k i the intraparticle diffusion rate constant (mg/g min 0.5 ) R 2 linear regression coefficient t time (min)T temperature (K)

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Adsorption of Ag, Cu and Hg from aqueous solutions using expanded perlite

Cited by 162 publications

References 26 publications

Long-Term Metal Retention Performance of Media Filter Drains for Stormwater Management

Long-Term Metal Retention Performance of Media Filter Drains for Stormwater Management

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

Physicochemical studies

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