A novel colloid composited with polyacrylate and nano ferrous sulfide and its efficiency and mechanism of removal of Cr(VI) from Water

Yao, Youru; Mi, Na; He, Cheng; Zhang, Yong; Yin, Li; Li, Jing; Wang, Wei; Yang, Shaogui; He, Huan; Li, Shiyin; Ni, Lixiao

doi:10.1016/j.jhazmat.2020.123082

Cited by 61 publications

(12 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under acidic conditions, PF-ZnONPs removed Cr (VI) with higher efficiency than under neutral conditions, reflecting the pH variation [ 41 ]. In a pH range of 3.0–6.0, Cr ions exist as HCrO 4− , H 2 Cr 4 , and Cr 2 O 7 2− [ 44 ]. Among Cr ions, CrO4 2− is the most readily reducible form at pH values of 6.0 to 12.0 [ 41 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

Wenjie

Ahmed

et al. 2022

Bioinorganic Chemistry and Applications

View full text Add to dashboard Cite

Aqueous solutions containing toxic elements (TEs) (such as hexavalent chromium (Cr (VI)) can be toxic to humans even at trace levels. Thus, removing TEs from the aqueous environment is essential for the protection of biodiversity, hydrosphere ecosystems, and humans. For plant fabrication of zinc oxide nanoparticles (PF-ZnONPs), Azolla pinnata plants were used, and X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), SEM, and FTIR techniques were used for the identification of PF-ZnONPs and ZnONPs, which were used to remove Cr (VI) from aqueous solution. A number of adsorption parameters were studied, including pH, dose, concentration of metal ions, and contact time. The removal efficiency of PF-ZnONPs for Cr (VI) has been found to be 96% at a time (60 min), 69.02% at pH 4, and 70.43% at a dose (10 mg·L−1). It was found that the pseudo-second-order model best described the adsorption of Cr (VI) onto PF-ZnONPs, indicating a fast initial adsorption via diffusion. The experimental data were also highly consistent with the Langmuir isotherm model calculations.

show abstract

Section: Resultsmentioning

confidence: 99%

“…2− [44]. Among Cr ions, CrO4 2− is the most readily reducible form at pH values of 6.0 to 12.0 [41,45].…”

Section: Ph Effectsmentioning

confidence: 98%

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

Wenjie

Ahmed

et al. 2022

Bioinorganic Chemistry and Applications

View full text Add to dashboard Cite

show abstract

“…This stable dispersion had 50% higher dye sorption capacity compared with bare magnetite nanoparticles. Also, Yao and co-workers [129] obtained stable core-shell colloids (~65-90 nm) based on FeS and PAA with increased sorption properties for Cr 6+ sorption compared with unmodified FeS. Using direct deposition, by pH inversion precipitation of carboxymethylchitosan onto unmodified and modified silica particles, Aden and collaborators [83] obtained core-shell composites with excellent sorption properties for Ni 2+ (Figure 7).…”

Section: Core-shell Compositesmentioning

confidence: 95%

“…The core-shell architecture could be achieved by direct deposition of different types of natural/synthetic polyelectrolytes (CS, PEI, humic acid, PAH, PVAm, PAA, PSS etc.) on 2D-cores, such as GO [21][22][23]25,115,116] and Ti 3 C 2 -MXenes [117], or 3D-cores, including Fe 3 O 4 [57,108,122,123,126,127], SiO 2 [24,28,83,90,100,101,103,109], SiO 2 /Fe 3 O 4 [88,128], PS [91], FeS [129], clays [99,111,112], CaCO 3 [102], mesoporous diatomite [89], natural fibers [107] and sand [123]. The direct deposition of the organic or organic/inorganic "shell" onto inorganic or organic "core" could be carried out in (i) one-step, by physisorption [21,89,108,111,112], grafting [23,83,88,100,115,117], ionic or solvent gelation/precipitation [25,27,…”

Section: Core-shell Compositesmentioning

confidence: 99%

An Overview on Composite Sorbents Based on Polyelectrolytes Used in Advanced Wastewater Treatment

et al. 2021

View full text Add to dashboard Cite

Advanced wastewater treatment processes are required to implement wastewater reuse in agriculture or industry, the efficient removal of targeted priority and emerging organic & inorganic pollutants being compulsory (due to their eco-toxicological and human health effects, bio-accumulative, and degradation characteristics). Various processes such as membrane separations, adsorption, advanced oxidation, filtration, disinfection may be used in combination with one or more conventional treatment stages, but technical and environmental criteria are important to assess their application. Natural and synthetic polyelectrolytes combined with some inorganic materials or other organic or inorganic polymers create new materials (composites) that are currently used in sorption of toxic pollutants. The recent developments on the synthesis and characterization of composites based on polyelectrolytes, divided according to their macroscopic shape—beads, core-shell, gels, nanofibers, membranes—are discussed, and a correlation of their actual structure and properties with the adsorption mechanisms and removal efficiencies of various pollutants in aqueous media (priority and emerging pollutants or other model pollutants) are presented.

show abstract

“…Due to the high surface energy and susceptibility to oxidative agglomeration of nano-FeS, there is a need to provide a carrier material that enhances its stability. 10 Yao et al 11 used a novel colloid of polyacrylate compounded with nano-FeS to remove Cr(VI) from water, which improved the dispersion and stability of nano-FeS by increasing the spatial site resistance and electrostatic repulsion between nano-FeS particles. Park et al 12 used experiments to compare the adsorption capacity of quartz sand for Cr(VI) before and after loading FeS, and the results showed that the adsorption of Cr(VI) by quartz sand after loading FeS was 25.2 times higher than that of quartz sand.…”

Section: Introductionmentioning

confidence: 99%

Study on the Preparation of Nano-FeS Loaded on Fly Ash and Its Cr Removal Performance

Guo

Gao

et al. 2022

ACS Omega

View full text Add to dashboard Cite

Chromium has been considered as one of the most hazardous heavy metals because of its strong and persistent toxicity to the ecosystem and human beings. In this study, fly ash-loaded nano-FeS (nFeS-F) composites were constructed with fly ash as the carrier, and the performance and mechanism of the composites for the removal of Cr(VI) and total chromium from water were investigated. The composite was characterized by X-ray diffraction and transmission electron microscopy. The effects of fly ash size, molarity of FeSO 4 , and flow rate of FeSO 4 solution on the removal of Cr(VI) and total chromium were investigated by a single factor experiment. The interaction of various factors was studied by the Box-Behnken response surface methodology. The optimum conditions of removal of Cr(VI)and total chromium by nFeS-F were determined. The results show that ① the optimal preparation conditions for nFeS-F were an FeSO 4 concentration of 0.45 mol/L, a fly ash particle size of 120–150 mesh, and a flow rate of 0.43 mL/s.② The response surface model provides reliable predictions for the removal efficiencies of Cr(VI) and total chromium.③ The removal efficiencies of Cr(VI) and total chromium were 92.87 and 83.53%, respectively, under the optimal preparation conditions by the experimental test. This study provides an effective method for the removal of Cr(VI) and total chromium.

show abstract

A novel colloid composited with polyacrylate and nano ferrous sulfide and its efficiency and mechanism of removal of Cr(VI) from Water

Cited by 61 publications

References 46 publications

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

An Overview on Composite Sorbents Based on Polyelectrolytes Used in Advanced Wastewater Treatment

Study on the Preparation of Nano-FeS Loaded on Fly Ash and Its Cr Removal Performance

Contact Info

Product

Resources

About