Application of iron-coated zeolites (ICZ) for mine drainage treatment

Jeon, Choong; Park, Sung Woo; Baek, Kitae; Yang, Jung‐Seok; Park, Joon-Gyu

doi:10.1007/s11814-012-0013-4

Cited by 16 publications

(8 citation statements)

References 24 publications

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“…Laboratory and field experiments with household zero-valent Fe filters showed similarly effective results in Bangladesh [40]. Field tests with Fe-coated zeolites showed 99% removal of As [41]. Mn-Fe oxide-coated diatomites were able to reduce iAs from >40 μg/L to <10 μg/L in a pilot field-scale study [42].…”

Section: Arsenic Chemistry Geochemistry Prevalence and Toxicitymentioning

confidence: 77%

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

2014

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A review of the literature about calculating the adsorption properties of arsenic onto mineral models using density functional theory (DFT) is presented. Furthermore, this work presents DFT results that show the effect of model charge, hydration, oxidation state, and DFT method on the structures and adsorption energies for As (oxyhydr)oxide cluster models were calculated using planewave and cluster-model DFT methods.

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Section: Arsenic Chemistry Geochemistry Prevalence and Toxicitymentioning

confidence: 77%

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

2014

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“…For example, a zeolite from Greece had Langmuir adsorption capacities (mg/g) of 3.5, 4.1, 4.6, and 5.9 for Zn, Cr, Cd, and Cu, respectively [22]. Another study done in South Korea revealed that a zeolite had Langmuir adsorption capacities (mg/g) of 6.5, 7.1, and 8.9 for Cu, Cd, and Pb, respectively [10]. The adsorption capacities of ICZ (Table 2) and 2.5 mg/g, respectively [24].…”

Section: Batch Equilibrium Adsorption Modellingmentioning

confidence: 99%

“…Some studies have shown that modification of zeolite surface by coating with iron (ICZ) can enhance the adsorption capacity of the zeolite for heavy metals [7][8][9][10][11]. In batch experiments, Han et al [8] found that an iron oxide-coated zeolite had greater adsorption capacity than zeolite for Cu.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous adsorption of Cd, Cr, Cu, Pb, and Zn by an iron-coated Australian zeolite in batch and fixed-bed column studies

Chung

Loganathan

Nguyễn

et al. 2015

Chemical Engineering Journal

234

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Excessive levels of heavy metals in water are an environmental hazard. An Australian zeolite with (ICZ) and without (Z) iron-coating, was used to remove five heavy metals from aqueous solutions using adsorption in batch and column experiments. The batch study showed that the Langmuir adsorption capacities of heavy metals on Z and ICZ at pH 6.5 and ionic strength 10-3 M NaNO 3 were in the order Pb > Cu > Cd > Cr, Zn for single metal (5.0-11.2 mg/g) and for mixed metals solution (3.7-7.6 mg/g). The data for the kinetics of adsorption satisfactory fitted to both the pseudo-first and second order models with fits slightly better for the latter model. Data fitted to a diffusion model revealed that adsorption took place in two or more than two different stages: a fast external surface adsorption, and a gradual adsorption controlled by both film diffusion and intra-particle diffusion. The column adsorption data were fairly well described by Thomas model, with the order of Thomas adsorption capacity following a similar trend as in the batch study. In both batch and column experiments, the adsorption capacities were higher for ICZ than for Z and were generally lower in mixed metals system than in single metals system. Leaching of used ICZ columns with 0.1 M HCl, resulted in 64-93% of adsorbed metals being desorbed, and 10% of Fe being dissolved from the ICZ.

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“…They also stated that the average adsorption capacity calculated from the breakthrough curves followed the order of Pb > Cu > Cd. Similarly, Jeon et al [30] reported that the time taken for the effluent concentration of metals to reach the influent concentrations (Ce/Co =1) was longer for Cu than Cd when the metal solutions at pH 3 were passed through zeolite and iron oxide coated zeolite columns. During the entire experiment, no Pb was detected in the effluent of any of the columns.…”

Section: Mixed Metalsmentioning

confidence: 92%

Column studies on the removal of dissolved organic carbon, turbidity and heavy metals from stormwater using granular activated carbon

Sounthararajah¹,

Loganathan²,

Kandasamy³

et al. 2015

Desalination and Water Treatment

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Stormwater pollutants have the capacity to damage aquatic environments if they are discharged untreated. Suspended solids (turbidity) dissolved organic carbon (DOC) and heavy metals removals from stormwater were investigated in batch and fixed-bed column experiments. Field studies revealed that turbidity and DOC in stormwater were effectively removed at filtration velocities of 5, 10 and 11.5 m/h using a 100 cm height granular activated carbon (GAC) filter column. At the higher filtration velocities of 10 and 11.5 m/h, adding a pre-treatment 100 cm height anthracite filter column further improved DOC and turbidity removal. Batch and column laboratory adsorption experiments at pH 6.5-7.2 using GAC showed that the order of removal efficiency for solutions containing single and mixed metals was Pb, Cu > Zn > Ni, Cd. This order was related to the solubility product and first hydrolysis constants of these metals' hydroxides. This study confirmed that GAC filter is effective in removing turbidity, DOC and heavy metals from stormwater.

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Application of iron-coated zeolites (ICZ) for mine drainage treatment

Cited by 16 publications

References 24 publications

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

Simultaneous adsorption of Cd, Cr, Cu, Pb, and Zn by an iron-coated Australian zeolite in batch and fixed-bed column studies

Column studies on the removal of dissolved organic carbon, turbidity and heavy metals from stormwater using granular activated carbon

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