Nickel removal from wastewater by electroflocculation-filtration hybridization

Sun, Lianpeng; Miznikov, E.; Wang, L.; Adin, Avner

doi:10.1016/j.desal.2009.01.040

Cited by 32 publications

(19 citation statements)

References 12 publications

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“…Their study demonstrated that the metal removal rate reached 99%. EF with iron electrodes hybrid with filter paper, micro-and ultra-filtration bench scale tests were performed to obtain high removal efficiency of nickel with and without the introduction of external oxygen (Sun et al, 2009). Research results indicated that with the hybridization of EF without aeration followed by microfiltration, and aeration-enhanced EF followed by settling and mechanical filtration, the residual nickel and iron could meet the discharge standard of metal finishing industry.…”

Section: Electrochemical Treatmentmentioning

confidence: 94%

Removal of heavy metal ions from wastewaters: A review

Wang

2011

Journal of Environmental Management

7,060

3,041

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Section: Electrochemical Treatmentmentioning

confidence: 94%

Removal of heavy metal ions from wastewaters: A review

Wang

2011

Journal of Environmental Management

7,060

3,041

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“…One of these techniques is the process of electrocoagulation which is a novel and efficient method for heavy metals removal (Akbal and Camc 2011;Arroyo et al 2009;Bhatti et al 2009;Schulz et al 2009;Sun et al 2009). Other methods for removing metal ions from wastewater are deposition, evaporation, solvent extraction, ion exchange, reverse osmosis, separation by membrane, etc.…”

Section: Introductionmentioning

confidence: 99%

Effective parameters for the adsorption of chromium(III) onto iron oxide magnetic nanoparticle

Shahriari

Bidhendi

Mehrdadi

et al. 2013

Int. J. Environ. Sci. Technol.

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Most of the industrial wastewaters comprise toxic, biologically non-biodegradable, and heavy metals which tend to accumulate in the biological organisms causing different diseases. There are some novel technologies and strategies to remove these pollutants. Using the magnetic nanoparticles which are cheap, recyclable, and reusable can be considered as an effective method for removing the pollutants as they do not require conservation or complicated equipments. Using this method, dangerous and rare heavy metals can be restored to the industry. In this study, magnetic nanoparticles with the size of 30 nm were prepared and used for the removal of chromium from synthetic wastewater polluted by chromium sulfate. For this purpose, removal of various concentrations of chromium(III) from wastewater was investigated. The best concentration was achieved in the removal efficiency of 99.1 %. The optimal values of pH, rotation speed of magnetic stirrer, time, temperature, and the amount of nanoparticles were determined according to the primary concentration (500 mg/L). The mechanism of chromium adsorption onto iron oxide (Fe 3 O 4 ) magnetic nanoadsorbent was also investigated. The results showed both Freundlich and Longmuir isotherms to be the best fit for the chromium adsorption, with Freundlich isotherm being more suitable.

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“…Conventional treatment technologies for heavy metals mainly include chemical precipitation [8], ionexchange [9], adsorption [10], membrane [11], flotation [12], coagulation-flocculation [13], and electrochemical methods [14]. Among these, adsorption process is featured by its easy setup, simple operation, low maintenance cost, and many types of readily accessible costeffective adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale iron oxides loaded granular activated carbon (GAC-NSIO) for cadmium removal

Zhang

Chen

et al. 2014

Desalination and Water Treatment

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A new hybrid material was prepared by loading the nanoscale iron oxide particles within the pores of granular activated carbon (GAC-NSIO) and used as adsorbent to remove Cd(II) in aqueous phase. The new material is characterized by the pH pzc , TEM, XRD, BET, and XPS analytical techniques to deduce the potential adsorptive mechanism, and further it along with GAC were assessed in the removal of Cd(II) from aqueous solution for various physico-chemical factors iron-loaded content, pH, humic acid, isotherm, kinetics, and thermodynamics, under the batch reactor studies and rapid small-scale column tests also appended dealing with the breakthrough volume. Characterization of adsorbent indicated that the amorphous nanoscale iron oxides were successfully immobilized on GAC. Adsorption mechanism mainly included surface complexation, Donnan membrane effect, and electrostatic attraction. The optimum iron-loaded content of GAC-NSIO was 17%. The adsorption process was more favorable at high pH, and iron oxide was almost no leaching (<0.25%) in the pH range of 3-6. Adsorption isotherm fitted well with Langmuir and Freundlich models. And adsorption kinetics fitted well with pseudo-second-order and intraparticle diffusion models. Results indicated that loaded nanoscale iron oxides significantly increased adsorption capacity of Cd(II) though the adsorption rate declined slightly and the adsorption process was endothermic. The maximum adsorptive capacity of GAC-NSIO (7.84 mg/g) increased by 700%, compared to that of GAC (0.98 mg/g). The presence of humic acid could greatly impact Cd(II) adsorption which promoted adsorption at low concentrations (1-10 mg/L) and inhibited adsorption at high concentrations (10-300 mg/L). Rapid small-scale column tests were conducted to obtain Cd(II) breakthrough profile. The results corresponded well with those from batch tests. Results demonstrate that the GAC-NSIO is a promising adsorbent for the removal of Cd(II) in contaminated water environment.

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Nickel removal from wastewater by electroflocculation-filtration hybridization

Cited by 32 publications

References 12 publications

Removal of heavy metal ions from wastewaters: A review

Removal of heavy metal ions from wastewaters: A review

Effective parameters for the adsorption of chromium(III) onto iron oxide magnetic nanoparticle

Nanoscale iron oxides loaded granular activated carbon (GAC-NSIO) for cadmium removal

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