Surface complexation modeling of the removal of arsenic from ion-exchange waste brines with ferric chloride

Pakzadeh, Behrang; Batista, Jacimaria R.

doi:10.1016/j.jhazmat.2011.01.117

Cited by 41 publications

(18 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Durinfg the removal process, Macroporous strong-based anion exchange resin D296 has 2 maximum poifnts: at pH 5 with arsenic removal rate up to 63.4%, and at pH 8 with arsenic removal rate up to 52.1%; for Zr-D401 enzymatic hydrolyzate, the arsenic removal rate is up to 67.7% at pH 8, and at this pH the arsenic removal rate of Zr-D401 is higher than any other pH condition. Similar results have been reported: optimum pH range was found between 4−6 by An et al (2011) and between 4.5−6.5 by Pakzadeh and Batista (2011) by using the method of ion-exchange. Biswas et al (2008) reported that arsenate was strongly adsorbed in the pH range from 2 to 6, while arsenite was strongly adsorbed between pH 9 and 10 by Zr (IV)-loaded orange waste gel through the removal of As (V) and As (III).…”

Section: Effect Of Ph On the Removal Of Arsenic By D296supporting

confidence: 90%

Arsenic removal from Pinctada martensii enzymatic hydrolysate by using Zr(IV)-loaded chelating resin

Yang

Dai

Sun

et al. 2013

J. Ocean Univ. China

View full text Add to dashboard Cite

The present study investigated the removal of inorganic arsenic from Pinctada martensii enzymatic hydrolysate through unmodified resin (D296) and Zr(Ⅳ)-loaded chelating resin (Zr-D401). By loading Zr to macroporous chelating resin D401, the as exchange adsorption active sites are generated. This transforms D401 from a material that does not have the arsenic adsorption capacity into a material that has excellent arsenic exchange adsorption capacity. The static adsorption experiments were conducted to investigate the optimal removal condition for D296 and Zr-D401. The experimental results show that: the optimum condition for D296 is that T= 25℃, pH = 5, resin additive amount = 1 g (50 mL) -1 , and contact time = 10 h, the corresponding arsenic removal rate being 65.7%, and protein loss being 2.33%; the optimum condition for Zr-D401 is that T=25℃, pH = 8, resin additive amount = 1 g (50 mL) -1 , and contact time=10 h, the corresponding arsenic removal rate being 70.3%, and protein loss being 4.65%. These results show that both of the two resins are effective in arsenic removal for preserving useful substance. Our research provides scientific evidence and advances in the processing technology for heavy metal removal in shellfish.

show abstract

Section: Effect Of Ph On the Removal Of Arsenic By D296supporting

confidence: 90%

Arsenic removal from Pinctada martensii enzymatic hydrolysate by using Zr(IV)-loaded chelating resin

Yang

Dai

Sun

et al. 2013

J. Ocean Univ. China

View full text Add to dashboard Cite

show abstract

“…Surface complexation modeling (SCM) techniques such as the charge distribution multi-site complexation (CD-MUSIC) [76,95,[98][99][100][101][102][103][104][105][106], the extended triple-layer model [107], isotherm modeling [108,109], and the ligand and charge distribution model (LCD) [110,111] have been used to model As species in solution and adsorbed to mineral surfaces. In general, SCM models use experimental data or quantum mechanics results such as equilibrium constants, bond lengths, and surface charges to calculate the adsorption isotherms of As on Fe mineral surfaces.…”

Section: Studying As Adsorption With Mathematical Modelsmentioning

confidence: 99%

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

2014

View full text Add to dashboard Cite

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.

show abstract

“…Siegel and Clifford () demonstrated that sodium sulfite, ferrous sulfate, and hydrazine are all capable of removing Cr(VI) from SBA exchange brines, but found that only ferrous sulfate can do so effectively without pH adjustment (Siegel & Clifford ). Pakzadeh and Batista (, ) studied the effects of pH, initial Cr(VI) concentration, reductant dosage, and several other factors on RCF treatment with calcium polysulfide (Pakzadeh & Batista ). They found that pH, oxidation–reduction potential, and calcium polysulfide dose had a large effect on the process.…”

Section: Previous Studies Of Reduction–coagulation–filtration In Stromentioning

confidence: 99%

Evaluating Ferrous Chloride for Removal of Chromium From Ion‐Exchange Waste Brines

2018

View full text Add to dashboard Cite

Ferrous chloride (FeCl 2 ) added to chromium-laden brines produced by strong base anion (SBA) exchange systems reduces hexavalent chromium (Cr(VI)) to trivalent chromium (Cr(III)) and precipitates the Cr(III) in a mixed chromium-iron hydroxide solid solution. A series of jar tests were conducted in which FeCl 2 was added to synthetic SBA exchange brines. The variables investigated were the initial Cr(VI) concentration, initial pH, and ferrous iron stoichiometric dose. This reduction-coagulation-flocculation (RCF) process was also tested on field brines with various compositions. The RCF process achieved >77% chromium removal efficiency at all tested conditions, except in brines with a bicarbonate matrix. Significant vanadium (V) and arsenic (As) removal (>78 and >49% removal, respectively) was observed in field brines with a chloride or sulfate matrix. Diffuse double-layer modeling suggests that adsorption to the precipitated solids was the predominant removal mechanism of V and As.

show abstract

Surface complexation modeling of the removal of arsenic from ion-exchange waste brines with ferric chloride

Cited by 41 publications

References 41 publications

Arsenic removal from Pinctada martensii enzymatic hydrolysate by using Zr(IV)-loaded chelating resin

Arsenic removal from Pinctada martensii enzymatic hydrolysate by using Zr(IV)-loaded chelating resin

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

Evaluating Ferrous Chloride for Removal of Chromium From Ion‐Exchange Waste Brines

Contact Info

Product

Resources

About