Comparisons of low-cost adsorbents for treating wastewaters laden with heavy metals

Kurniawan, Tonni Agustiono; Chan, Yuk Sing Gilbert; Lo, Wai‐Hung; Babel, Sandhya

doi:10.1016/j.scitotenv.2005.10.001

Cited by 661 publications

(345 citation statements)

References 87 publications

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“…At lower pH than 8, the dominant forms of nickel was Ni 2+ ; while at pH more than 8, Ni(OH) 2 were present as precipitate [19]. Whereas Cu(OH) 2 will be the dominant species at pH more than pH 6 [20]. …”

Section: B Effect Of Phmentioning

confidence: 93%

Optimization of Nickel and Copper Ions Removal by Modified Mangrove Barks

Rozaini¹,

Jain²,

Oo³

et al. 2010

IJCEA

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Abstract-Mangrove barks Rhizophora apiculata which have been chemically modified in basic condition were used as adsorbent for the removal of nickel and copper ions from aqueous solution. The adsorbent was characterized by SEM images, FT-IR and BET analysis. Effecting parameters like initial pH, initial concentrations of metal ions and contact time were investigated. The adsorption data were well fitted by Freundlich isotherm model. Kinetic data were best described by pseudo-second-order model. Thermodynamic studies showed spontaneous and exothermic nature in the adsorption of Ni(II) and Cu(II) ions by the modified mangrove barks.

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Section: B Effect Of Phmentioning

confidence: 93%

Optimization of Nickel and Copper Ions Removal by Modified Mangrove Barks

Rozaini¹,

Jain²,

Oo³

et al. 2010

IJCEA

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“…Activated carbon (AC) is one of the most common industrial adsorbents used for mercury removal Kurniawan et al, 2006;), yet various studies have shown practical limitations. Even in a welloperated system regeneration of the carbon may result in a loss of ~15% of the original material; this coupled with the use of complexing agents to improve performance can result in substantial waste generation (Babel and Kurniawan, 2003;.…”

Section: Introductionmentioning

confidence: 99%

Thiol-functionalised mesoporous silica-coated magnetite nanoparticles for high efficiency removal and recovery of Hg from water

2012

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The preparation and testing of thiol-functionalised silica-coated magnetite nanoparticles (TF-SCMNPs) is described. The characteristics of these particles are assessed at different stages in the production process using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), and a magnetometer. The particles were found to be almost spherical with a uniform mesoporous structure with a pore size of ~2.1 nm. The particles were strongly responsive to an external magnetic field making separation from solution possible in less than 1 min. The adsorption characteristics of the particles were quantified in a series of isotherm experiments using Hg(II) solution concentrations between 40 and 1000 μg l -1 at adsorbent concentrations of 4 and 8 mg l -1 . The adsorption capacity was higher than for other commonly used adsorbents with 90% of Hg(II) removed during the first 5 min and equilibrium in less than 15 min. Both the Langmuir and Freundlich isotherm models were applied to the isotherm data and the maximum adsorption capacity was achieved when the ratio of adsorbent to adsorbate was low. temperature and pH had an effect on adsorption but when the TF-SCMNPs were used for removal of Hg(II) from tap water and bottled water, which contained other ions, there appeared to be no interference. Hg(II) could be successfully desorbed using thiourea in a 3M HCl solution; this did not result in the destruction of the nanoparticles and they could subsequently be reused without loss of their activity in repetitive adsorption tests.

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“…The ability of biomaterials to remove heavy metals through biosorption has proved to be highly efficient, easy to handle, environment-friendly, and economically feasible. This has attracted plenty of attentions in recent years [2][3][4] because biomaterials are: (i) available in abundance and cheap, (ii) easy to obtain and process, and (iii) available as waste type or nuisance [5].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Pb2+ removal from aqueous solution using a nonliving moss biomass

Olu-Owolabi

Diagboya

Ebaddan

2012

Chemical Engineering Journal

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. a b s t r a c tBiosorption of lead (II) ions onto raw biomass of the moss plant Barbula lambarenensis has been studied using the batch equilibrium adsorption method. Equilibrium isotherms, kinetics and thermodynamic parameters have been evaluated. The FT-IR analysis showed that likely functional groups responsible for the adsorption are carboxyl, carbonyl, amides and hydroxyl groups. The pH for optimum adsorption is 5.0. Equilibrium data fit well to the Langmuir isotherm. The estimated maximum adsorption capacity was found to be 62.50 mg/g at 298 K and 90.91 mg/g at 323 K. The kinetic data obeyed the pseudo-second-order model. The free energy changes (DG o ) are positive and the reaction is exothermic with decreased randomness at the sorbent/solution interface. Taking into account its good adsorption capacity, ease of sample treatment, as well as availability, the biomass of B. lambarenensis is a promising cost-effective biosorbent for Pb 2+ removal from aqueous environment.

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Comparisons of low-cost adsorbents for treating wastewaters laden with heavy metals

Cited by 661 publications

References 87 publications

Optimization of Nickel and Copper Ions Removal by Modified Mangrove Barks

Optimization of Nickel and Copper Ions Removal by Modified Mangrove Barks

Thiol-functionalised mesoporous silica-coated magnetite nanoparticles for high efficiency removal and recovery of Hg from water

Mechanism of Pb2+ removal from aqueous solution using a nonliving moss biomass

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