From laboratory to large-scale manufacture of anion exchange resin-supported nano-hydrated zirconium oxide for As(V) removal from water solutions

Deng, Zhiming; Fang, Zhuoyao; Liu, Airong; Xu, Nian; Zhang, Xiaolin

doi:10.1016/j.scitotenv.2021.146103

Cited by 16 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the 150-day field study, the structure evolutions of HZO@D201 are recorded in Figure . The TEM images in Figure a suggest that the size distribution of nano-HZO in fresh HZO@D201 was consistent with the previous studies (10–60 nm), and the morphology and distribution of nano-HZO remained unchanged after long-term field demonstration (Figure b), indicating the outstanding stability of the confined nano-HZO. The N 2 adsorption–desorption analysis was carried out to determine pore blockage of HZO@D201 after long-term utilization.…”

Section: Resultssupporting

confidence: 89%

“…HZO@D201 was manufactured according to our previous study . The entire process was carried out in a 300 L reactor equipped with mechanical agitation and the schematic illustration is displayed in Figure S3.…”

Section: Methodsmentioning

confidence: 99%

“…More importantly, the exhausted HZO@D201 could be fully refreshed for cyclic use after simple treatment with the NaOH−NaCl binary solution. 31,34 In addition to HZO@D201, lots of other nanocomposite adsorbents have also been developed for fluoride pollution control. 26,36 However, in spite of extensive laboratory studies, 8,15,16,25,26,34,36 the field demonstration of nanotechnology for groundwater defluoridation is very rare.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Deng

Cheng

et al. 2022

ACS EST Eng.

Self Cite

View full text Add to dashboard Cite

Fluoride contamination in groundwater is a global issue. Nanoscale oxides of Zr(IV), Al(III), and Ti(IV) can form the inner-sphere complex with fluoride through ligand exchange, offering a new chance for efficient groundwater purification. However, pilot-scale field demonstration of nanotechnology in groundwater defluoridation is very rare. Herein, we conducted a 150-day field defluoridation study using the nanocomposite HZO@D201, which was prepared by encapsulating nano-hydrated zirconium oxide (HZO) inside the strongly basic anion exchanger D201. The HZO@D201 beads were packed in five-stage series columns (40 L for each column), and the groundwater was pumped through the columns sequentially. The effective treatment amount for the single column ([F–] < 1.0 mg/L) exceeded ∼3000 bed volume (BV). The exhausted HZO@D201 was fully refreshed through ex situ treatment with NaOH–NaCl solution for repeated use without significant loss in defluoridation reactivity. Owing to the specific interaction with HZO, the fluoride concentration could be steadily reduced below 1.0 mg/L throughout the 150-day field demonstration, while the common anions coexisting in groundwater (K+, Na+, Ca2+, Mg2+, SO4 2–, Cl–, etc.) remained almost unchanged. The operational cost for deep defluoridation was estimated as 0.574 RMB per ton of groundwater, much less than that of the widely studied reverse osmosis. TEM, XPS, and Fourier transform infrared (FTIR) analysis indicated that negligible change occurred in the structure and chemical composition of HZO@D201 after the long-term field assay. This study may inspire more attempts at the pilot scale and engineering demonstration of nano-enabled water treatment techniques.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Deng

Cheng

et al. 2022

ACS EST Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…66 Several synthetic resins have been developed for the removal of As. 66,[101][102][103] The process is similar to adsorption, with a medium of synthetic resin having greater ion exchange capacity. The oxidation of As(III) to As(V) before the ionexchange process radically improves the efficiency of As removal.…”

Section: Adsorptionmentioning

confidence: 99%

A review of arsenic mitigation strategies in community water supplies with insights from South Asia: options, opportunities and constraints

Bhowmik

Sarkar

Bhattacharya

et al. 2022

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

show abstract

“…The removal of arsenic(V) from waters, wastewaters, or generally speaking, aqueous solutions, is a topic of the utmost importance for the scientific community though there are few technologies proposed for this task (Alka et al, 2021;Weerasundara and Bundschuh, 2021). Some recent investigations describe the use of micro-structured carbon-based (Islam et al, 2021) and modified incinerated sewage sludge ash (Gao et al, 2021) adsorbents; ion exchange using various resins (Dadakhanov et al, 2021), resin-supported nano-hydrated zirconium oxide (Deng et al, 2021), and an electrochemical-ion exchange hybrid method (Rathi et al, 2021); various membrane processes (Moreira et al, 2021;Sherugar et al, 2021;Rojas-Challa et al, 2021;Jarma et al, 2021;Lopez et al, 2021); and solvent extraction using a Triton X nonionic surfactant-choline chloride ionic liquid-water mixture (Silva et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The removal of toxic metals from liquid effluents by ion exchange resins. Part XVII: Arsenic(V)/H+/Dowex 1x8

Escudero

2022

revmetal

View full text Add to dashboard Cite

The performance of anionic exchange resin Dowex 1x8 in the removal of arsenic(V) from aqueous solutions was investigated. Batch experimentation was carried out under different variables, including, the stirring speed applied on the system, the pH of the aqueous solution, resin dosage and temperature. Due to the characteristic speciation of arsenic(V) in aqueous phases, the removal of this element from the solution is negligible at highly acidic or alkaline pH values, but it is possible at the aqueous pH range of 4-9, thus, both HAsO42- and H2AsO4- species are loaded onto the resin. At the above pH range, arsenic(V) uptake is exothermic. Different models are fitted to the experimental values in order to gain knowledge about this ion exchange system: rate law, kinetics and solute loading onto the resin. This loading is compared against the yielded using non-functionalized multiwalled carbon nanotubes. The elution step is investigated using acidic solutions (HCl medium) as eluent, from the eluted solutions, arsenic(V) can be efficiently stabilized as ferric or calcium arsenates.

show abstract

From laboratory to large-scale manufacture of anion exchange resin-supported nano-hydrated zirconium oxide for As(V) removal from water solutions

Cited by 16 publications

References 33 publications

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

A review of arsenic mitigation strategies in community water supplies with insights from South Asia: options, opportunities and constraints

The removal of toxic metals from liquid effluents by ion exchange resins. Part XVII: Arsenic(V)/H+/Dowex 1x8

Contact Info

Product

Resources

About