Separation of low concentration of cesium ion from wastewater by electrochemically switched ion exchange method: Experimental adsorption kinetics analysis

Sun, Bin; Hao, Xiaogang; Wang, Zhong-De; Guan, Guoqing; Zhang, Zhonglin; Li, Yibin; Liu, Shibin

doi:10.1016/j.jhazmat.2012.07.010

Cited by 104 publications

(31 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A wide range of materials, natural or synthetic, having different chemical and physical properties, are available for adsorption. Several kinds of adsorbents were investigated, both inorganic and conjugate adsorbent, including carboxymethylate cellulose (CMC) (Wang et al, 2009), magnetically 99 modified yeast cells (Ji et al, 2010), ferrite (Sheha and Metwally, 2007), NiHCF/PTCE (nickel hexacyanoferrate/porous three-dimensional carbon felt; Sun et al, 2012), ammonium molybdophosphate (Park et al, 2010), and so on (Awual et al, 2014). These adsorbents have been widely used owing to their chemical and temperature stabilities and radiation resistance.…”

Section: Srmentioning

confidence: 99%

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Chu

Wang

Chen

2014

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

-containing radioactive wastewater is one of the most important problems that the world has been facing with. A by-product, activated porous calcium silicate, is generated at high levels by the pre-desiliconizing and soda-lime-sintering processes for producing Al 2 O 3 from high-alumina fly ash. In order to examine if this by-product could be used as an absorbent for removal of Sr2+ from radioactive wastewater, various parameters, such as pH, adsorbent dose, contact time, and initial concentration, were discussed. Results indicated that the equilibrium reached in about 2 hr. Activated porous calcium silicate was highly pH sensitive and able to remove Cs + /Sr 2+ in a near-neutral environment. The adsorption equilibrium was best described by Freundlich isotherm equations, and the adsorption of Cs + /Sr 2+ was a physical process. The adsorption kinetic data could be better fitted by the pseudo-second-order model, and the adsorption was controlled by multidiffusion. Current study showed that activated porous calcium silicate has a good adsorption of Cs + /Sr 2+ for their removal. However, other characteristics, such as selectivity because of coexisting cations, elution and regeneration, thermal stability, and acid resistance, should be discussed carefully before using it in an actual field. Implications:Removing 137 Cs + / 90 Sr 2+ from radioactive wastewater is one of the tough issues that has been attracting more and more attention world widely, which is the same as fly ash. For recycling high-alumina fly ash, in which Al is extracted to produce Al 2 O 3 , a huge amount of activated porous calcium silicate is generated year by year. In this paper, this by-product was successfully used as an absorbent to remove 137 Cs + / 90 Sr 2+ from radioactive wastewater for the first time. Factors that affect the absorbability and the mechanisms were discussed in details, providing a possible choice for disposal of 137 Cs + / 90 Sr 2+ -containing radioactive wastewater.

show abstract

Section: Srmentioning

confidence: 99%

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Chu

Wang

Chen

2014

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

show abstract

“…137 Cs is also a heat generator element and hampers the final vitrification of HLW [26]. As a b-emitter, 137 Cs can be applied in several industries [27,28]. Efforts are on to separate cesium from HLW, but the effective separation is problematic.…”

Section: Introductionmentioning

confidence: 99%

Extraction equilibrium and thermodynamics of cesium with a new derivative of calix[4]biscrown

Dai

Zhang

2014

J Radioanal Nucl Chem

View full text Add to dashboard Cite

A new supermolecular recognition agent named tetra-tert-butyl-calix[4]-bis[(4-methly-1,2-phenylene-crown-6] (TertButylCalixC) was synthesized. Batchwise experiments of extraction of Na(I), K(I), Rb(I), Cs(I), Sr(II), Ba(II), Ru(III) and Fe(III) from aqueous solution with TertButylCalixC/o-nitroanisole were carried out. Effects of HNO 3 concentration, contact time and temperature on the extraction behavior were examined. The equilibrium established within 30 min implied a fast extraction kinetics. The optimal operation temperature was 298 K. Stoichiometry of TertButylCalixC and Cs(I) by electrospray ionization mass spectrometry characterization revealed 1:1 molar ratio. It was observed that the extraction system of TertButylCalixC/o-nitroanisole was effective for selective removal of Cs(I), showing remarkable separation performance.

show abstract

“…This is because the adsorption sites distribute discretely on the surface of amorphous ␣-ZrP/PANI hybrid film. In contrast, the ions adsorption kinetics of layered ␣-ZrP/PANI is in according with the pseudo-first-order reaction equation [20] since the diffusion of ions into the layered material is needed [17,53]. Consequently, the adsorption rate of amorphous ␣-ZrP/PANI hybrid is much faster than that of the layered ␣-ZrP/PANI.…”

Section: Electrochemical Behavior Of Amorphous˛-zrp/pani Hybrid Filmmentioning

confidence: 99%

“…In our previous work [16][17][18][19][20][21], an environmentally benign electrochemically switched ion exchange (ESIX) method for the selective separation of ions from mixed solution, has been widely studied. Such an ESIX method can not only reduce secondary pollution but also improve the ion exchange capacity via a potential triggered reversible switching process.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of electroactive amorphous α-ZrP/PANI hybrid film for potential-triggered adsorption of Pb 2+ ions

Zhang

et al. 2015

Journal of Hazardous Materials

View full text Add to dashboard Cite

Separation of low concentration of cesium ion from wastewater by electrochemically switched ion exchange method: Experimental adsorption kinetics analysis

Cited by 104 publications

References 36 publications

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Extraction equilibrium and thermodynamics of cesium with a new derivative of calix[4]biscrown

Facile preparation of electroactive amorphous α-ZrP/PANI hybrid film for potential-triggered adsorption of Pb 2+ ions

Contact Info

Product

Resources

About

Separation of low concentration of cesium ion from wastewater by electrochemically switched ion exchange method: Experimental adsorption kinetics analysis

Cited by 104 publications

References 36 publications

Preliminary study on removing Cs+/Sr2+ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Preliminary study on removing Cs+/Sr2+ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Extraction equilibrium and thermodynamics of cesium with a new derivative of calix[4]biscrown

Facile preparation of electroactive amorphous α-ZrP/PANI hybrid film for potential-triggered adsorption of Pb 2+ ions

Contact Info

Product

Resources

About

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

Preliminary study on removing Cs⁺/Sr²⁺ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry