Removal of strontium from aqueous solutions and synthetic seawater using resorcinol formaldehyde polycondensate resin

Nur, Tanjina; Loganathan, P.; Kandasamy, Jaya; Vigneswaran, S.

doi:10.1016/j.desal.2017.08.003

Cited by 56 publications

(15 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, pseudo-first-order kinetic and pseudo-second-order kinetic model (S1.2) were used 39,40 , and the experiment data and the fitting curves are shown in Fig. 4d.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Porous Polymer Using Biomass Polyphenol Source for Highly Efficient Separation of Cs+ from Aqueous Solution

Chen

Guo

2020

Sci Rep

View full text Add to dashboard Cite

in this work, a series of polyphenol porous polymers were derived from biomass polyphenols via a facile azo-coupling method. the structure and morphologies of the polymer were characterized by Bet, teM, SeM, XRD, tGA and ft-iR techniques. Batch experiments demonstrated their potentialities for adsorptive separation of cs + from aqueous solution. Among them, porous polymers prepared with gallic acid as starting material (GApp) could adsorb cs + at wide pH value range effectively, and the optimal adsorption capacity was up to 163.6 mg/g, placing it at top material for Cs + adsorption. GApp exhibited significantly high adsorption performance toward Cs + compared to na + and K + , making it possible in selective removal of cs + from ground water in presence of co-existing competitive ions. Moreover, the cs-laden GApp could be facilely eluted and reused in consecutive adsorption-desorption processes. As a result, we hope this work could provide ideas about the potential utilization of biomass polyphenol in environmental remediation. Growing concern about the remediation of radioactive waste generated from nuclear power plants and unforeseen accidents have been given worldwide for the sake of human health and environmental issues 1-4. Among them, radio-isotope 137 Cs is considered as the most hazardous nuclide due to the serious gamma radiation, long half-life as well as high solubility being an alkaline element 5,6. The generation of hazardous 137 Cs by nuclear waste and unforeseen nuclear plant accidents has seriously threatened the global environment and human health. In addition, long-term exposure to 137 Cs-contanining wastewater would lead to horrible diseases such as cancer, leukemia and genetic disorder 7. For example, the accidents occurred at Chernobyl in 1986 and Fukushima in 2011 severely impacted the local environments, and the surrounding areas are still classified as dangerous regions due to the leakage and serious emission of 137 Cs and other radio-isotopes 8,9. Therefore, effective techniques for the decontamination of radioactive Cs + from wastewater are indispensable and highly desirable. So far, considerable efforts have been made to explore available methodologies for hazardous Cs + removal from radioactive wastewater, such as liquid-liquid solvent extraction, chemical precipitation, electrochemical techniques and adsorption process 10-12. Taking disposal cost and removal efficiency into consideration, adsorption is considered as one of the most effective and clean techniques, and has been widely used in Cs + removal. To date, Prussian blue (PB) analogues 12,13 , titanate nanomaterials 14 , metal oxides and sulfides 15 , natural zeolites 16 , ammonium molybdophosphate 17,18 and other adsorbents 19 were developed and used for the removal of Cs + from radioactive effluents. Unfortunately, they still suffered from several problems, such as considerable preparation cost, unsatisfactory adsorption performance and insufficient stability, thus majority of the adsorbents aforementioned were not environment...

show abstract

“…In this work, pseudo-first-order kinetic and pseudo-second-order kinetic model (S1.2) were used 39,40 , and the experiment data and the fitting curves are shown in Fig. 4d.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Porous Polymer Using Biomass Polyphenol Source for Highly Efficient Separation of Cs+ from Aqueous Solution

Chen

Guo

2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The existence of both multicollinearity and outliers within a dataset negatively influences the outcomes of the SMR model (Tabachnick and Fidell, 2001). The existence of multicollinearity, which indicates an unwanted relationship between two independent variables, can be established by calculating the tolerance (TO) value, where small TO values (˂ 0.1) indicate the existence of the multicollinearity ( 'Brien, 2007):…”

Section: Examination Of the Assumptions Of The Smrmentioning

confidence: 99%

“…It has been well documented that EC technology is able to remove as much as 95-99% of various pollutants within a relatively short treatment time (Gao et al, 2010;Ricordel et al, 2014;Hashim et al, 2017b;Nariyan et al, 2018). It has been successfully used to purify water of pathogens (Ricordel et al, 2014), strontium (Nur et al, 2017), heavy metals (Hashim et al, 2017c;Martín-Domínguez et al, 2018), phosphate (Behbahani et al, 2011;Attour et al, 2014), and organic matter (Vepsäläinen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Electrocoagulation as a green technology for phosphate removal from river water

Hashim

Khaddar

Jasim

et al. 2019

Separation and Purification Technology

217

View full text Add to dashboard Cite

show abstract

“…23,24 However, Fe is present in high concentrations in Sr-bearing leachate and shows high affinity with resins, extraction agents, and membranes. 15,17 from the acidic leaching solution of a radioactive tank sludge, this approach results in Fe extraction and retention at a concentration of 12 mg/L in the extracting solution. 15 Such defects limit the applications of this method for high-purity Sr recovery.…”

Section: Introductionmentioning

confidence: 99%

“…Fe impurities in the sludge are dissolved by strong acids and decrease to residual concentrations of 5.7–44.7 g/L in the leachate . Second, Sr is separated from Sr-bearing leachate through the following approaches: cationic exchange, chemical precipitation, , solvent extraction, − and membrane filtration. , However, Fe is present in high concentrations in Sr-bearing leachate and shows high affinity with resins, extraction agents, and membranes. , For example, although the use of di- t -butylcyclohexano-18-crown-6 results in efficient Sr extraction from the acidic leaching solution of a radioactive tank sludge, this approach results in Fe extraction and retention at a concentration of 12 mg/L in the extracting solution . Such defects limit the applications of this method for high-purity Sr recovery.…”

Section: Introductionmentioning

confidence: 99%

Recycling of High-Purity Strontianite and Hematite from Strontium-Bearing Sludge

Bian

Chen

et al. 2020

ACS Omega

View full text Add to dashboard Cite

Sr-bearing sludge is a hazardous waste that is commonly generated by nuclear power plants and mineral refining operations. In this work, Sr-bearing sludge was simulated and then cleanly recycled into high-purity strontianite with hematite nanoparticles as a byproduct via a novel hematite precipitation route. The sludge contained 26.1% Fe, 3.5% Sr, and Si impurities. After dissolution in 1.2 M nitric acid, the sludge was treated hydrothermally with the addition of glycol to precipitate Fe effectively. Without the addition of glycol, only 52% Fe was hydrothermally precipitated in the form of hematite aggregates. With the addition of glycol at the optimal M glycol/M nitrate molar ratio of 0.4, nearly 100% Fe was removed in the form of hematite nanoparticles with an average diameter of 50 nm, whereas over 98% of Sr was retained in the leachate. The generated hematite was highly purified with an Fe2O3 content of 95.23%. Sr was present at a high concentration of 3.9 g/L in the treated leachate and further precipitated in the form of strontianite with a purity of 96.8% through Na2CO3 addition. Tertiary butanol (TeB) exhibited a similar Fe removal rate as glycol even though its optimal M TeB/M nitrate molar ratio was 0.1, which was approximately one-fourth the optimal M glycol/M nitrate molar ratio. Fe removal involved spontaneous Fe3+ hydrolysis under hydrothermal conditions and was promoted by increasing the pH of the redox reaction between nitrate and glycol and/or TeB. The method reported here successfully enabled the resource recycling of Sr-bearing sludge to generate high-purity strontianite and hematite products without producing any secondary waste.

show abstract

Removal of strontium from aqueous solutions and synthetic seawater using resorcinol formaldehyde polycondensate resin

Cited by 56 publications

References 41 publications

Facile Synthesis of Porous Polymer Using Biomass Polyphenol Source for Highly Efficient Separation of Cs+ from Aqueous Solution

Facile Synthesis of Porous Polymer Using Biomass Polyphenol Source for Highly Efficient Separation of Cs+ from Aqueous Solution

Electrocoagulation as a green technology for phosphate removal from river water

Recycling of High-Purity Strontianite and Hematite from Strontium-Bearing Sludge

Contact Info

Product

Resources

About