Removal of chromate ions from leachate-contaminated groundwater samples of Khan Chandpur, India, using chitin modified iron-enriched hydroxyapatite nanocomposite

Rajak, Jai Kishan; Khandelwal, Nitin; Behera, Mahima Prasad; Singh, Nisha; Ganie, Zahid Ahmad; Darbha, Gopala Krishna; Monikh, Fazel Abdolahpur; Schäfer, Thorsten

doi:10.1007/s11356-021-13549-7

Cited by 9 publications

(4 citation statements)

References 56 publications

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“…Furthermore, the efficacy of the hydrogel beads for the removal of other anionic contaminants such as arsenate and chromate is also tested in batch adsorption studies. The ingestion of these potentially toxic metal ions cause organ failure and can be fatal. , Therefore, the hydrogel beads are used as adsorbents for the removal of arsenate and chromate from 100 ± 0.2 mg L –1 solution of these ions. The residual concentration of As (V) and Cr (VI) ions present in the solution are estimated by microwave-assisted atomic emission spectroscopy.…”

Section: Results and Discussionmentioning

confidence: 99%

“…To the best of our knowledge, this is the first study on a fixed-bed column of metal–PVA hydrogel beads for effective fluoride adsorption from the groundwater sample. Moreover, due to good anion binding ability of the hydrogel beads, they are also tested for the removal of potentially toxic metal ions like arsenic (V) and chromium (VI), which predominantly exist as AsO 4 3– and CrO 4 2– , respectively, in aqueous solution. , Therefore, the hydrogel beads could be used for the effective removal of fluoride, arsenate, and chromate ions.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Fluoride Removal by a Fixed-Bed Column of Self-Assembled Zr(IV)-, Fe(III)-, Cu(II)-Complexed Polyvinyl Alcohol Hydrogel Beads

Mani

Bhandari

2022

ACS Omega

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Fixed-bed column adsorption studies are performed with metal-complexed polyvinyl alcohol (PVA) hydrogel beads to remove fluoride from groundwater. The fixed-bed column (bed height = 8 ± 0.2 cm) of copper–zirconium–PVA (PCZH), zirconium–PVA (PZH), and iron–zirconium–PVA (PFZH) hydrogel beads have equilibrium fluoride removal capacities of 17.26 ± 0.05, 31.67 ± 0.05, and 11.84 ± 0.05 mg g –1 from a 10 ± 0.20 mg L –1 fluoride solution of pH 6.5 maintained at a flow rate of 1 ± 0.01 mL min –1 . The breakthrough curves for fluoride adsorption are analyzed by non-linear empirical models of Thomas, Bohart–Adams, Yoon–Nelson, and semi-empirical bed depth service time models. The maximum fluoride adsorption capacities obtained from the Thomas model are 25.66 ± 0.05, 38.17 ± 0.05, and 13.75 ± 0.05 mg g –1 for PCZH, PZH, and PFZH. Moreover, the column of PZH (bed height = 4 ± 0.2 cm) removes about 1.67 ± 0.05 mg g –1 of fluoride from the alkaline groundwater sample with high total dissolved solids containing 2.84 ± 0.20 mg L –1 fluoride maintained at a flow rate of 0.5 ± 0.01 mL min –1 . The fluoride removal efficiency decreases marginally (<1 ± 0.02%) in the presence of interfering ions such as chlorides, sulfates, phosphates, bicarbonates, and nitrates. Furthermore, the fixed-bed column (bed height = 4 ± 0.2 cm) of PCZH, PZH, and PFZH remove 7.40 ± 0.05, 14.85 ± 0.05, and 6.53 ± 0.05 mg g –1 fluoride, respectively, even after the third regeneration cycle. Additionally, the hydrogel beads are effective in the removal of arsenate (≤90 ± 0.02%) and chromate ions (≤96 ± 0.02%) from 100 ± 0.20 mg L –1 solution in batch adsorption studies. Therefore, the hydrogel beads could be used as potent filters for the removal of fluoride, chromate, and arsenate ions from water.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Fluoride Removal by a Fixed-Bed Column of Self-Assembled Zr(IV)-, Fe(III)-, Cu(II)-Complexed Polyvinyl Alcohol Hydrogel Beads

Mani

Bhandari

2022

ACS Omega

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“…Chromate and dichromate in sewage form negatively charged ions, so the adsorbent surface with a positive charge can adsorb these negatively charged ions through electrostatic attraction [21][22][23][24]. In addition, the reductive groups (substances) on the adsorbent can reduce chromate and dichromate to Cr (III) positive ions, and these Cr (III) ions on the adsorbent surface achieve the adsorption of negative chromate and dichromate in sewage [25][26][27][28]. Therefore, the above methods for generating a positive charge on the adsorbent surface can achieve electrostatic attraction adsorption of chromate and dichromate.…”

Section: Features and Advantages Of The Principle Of Adsorptionmentioning

confidence: 99%

Research Progress of Treatment Technology and Adsorption Materials for Removing Chromate in the Environment

et al. 2023

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Cr is used extensively in industry, so the number of Cr (VI) hazards is increasing. The effective control and removal of Cr (VI) from the environment are becoming an increasing research priority. In order to provide a more comprehensive description of the research progress of chromate adsorption materials, this paper summarizes the articles describing chromate adsorption in the past five years. It summarizes the adsorption principles, adsorbent types, and adsorption effects to provide methods and ideas to solve the chromate pollution problem further. After research, it is found that many adsorbents reduce adsorption when there is too much charge in the water. Besides, to ensure adsorption efficiency, there are problems with the formability of some materials, which impact recycling.

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“…31 Hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 , with abundant hydroxyl groups and minor water solubility, is recognized as a worthy material in wastewater treatment. 32,33 However, metal-doped hydroxyapatite has been reported to have high efficiency in water purication because of its small crystallite size and bulky surface area. 34,35 The structural exibility of Hap allows for ion exchange in divergent crystallographic locations, but the core structure of HAP is le unchanged.…”

Section: Introductionmentioning

confidence: 99%

Engineering GO@Zn–Hap@CA porous heterostructure for ultra-fast and ultra-high adsorption efficacy: investigation towards the remediation of chromium and lead

Mahmud

Hossain

Mobarak

et al. 2022

Environ. Sci.: Adv.

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Removal of chromate ions from leachate-contaminated groundwater samples of Khan Chandpur, India, using chitin modified iron-enriched hydroxyapatite nanocomposite

Cited by 9 publications

References 56 publications

Efficient Fluoride Removal by a Fixed-Bed Column of Self-Assembled Zr(IV)-, Fe(III)-, Cu(II)-Complexed Polyvinyl Alcohol Hydrogel Beads

Efficient Fluoride Removal by a Fixed-Bed Column of Self-Assembled Zr(IV)-, Fe(III)-, Cu(II)-Complexed Polyvinyl Alcohol Hydrogel Beads

Research Progress of Treatment Technology and Adsorption Materials for Removing Chromate in the Environment

Engineering GO@Zn–Hap@CA porous heterostructure for ultra-fast and ultra-high adsorption efficacy: investigation towards the remediation of chromium and lead

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