Xanthate-Modified Magnetic Fe3O4@SiO2-Based Polyvinyl Alcohol/Chitosan Composite Material for Efficient Removal of Heavy Metal Ions from Water

Wang, Shifan; Liu, Yuan; Yang, Aiwen; Zhu, Qi; Sun, Haoyu; Sun, Po; Yao, Bing; Zang, Yunxiao; Du, Xiaosheng; Dong, Liming

doi:10.3390/polym14061107

Cited by 33 publications

(15 citation statements)

References 73 publications

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“…A variety of methods [ 2 , 3 , 4 ], including physical (e.g., sedimentation, filtration, flotation), chemical (e.g., coagulants, flocculants, disinfectants), physico-chemical (i.e., the adsorption of contaminants by various materials [ 5 , 6 , 7 , 8 ]) and biological processes, are commonly used to treat wastewater. Among these, biological methods are considered to be environmentally friendly and have relatively low operating and implementation costs.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Wastewater Using Yeast Strains: An Assessment of Contaminant Removal Efficiency

Nicula

Lungulescu

Rimbu

et al. 2023

IJERPH

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The main goal of wastewater treatment is to significantly reduce organic compounds, micronutrients (nitrogen and phosphorus) and heavy metals and other contaminants (pathogens, pharmaceuticals and industrial chemicals). In this work, the efficiency of removing different contaminants (COD, NO3−, NO2−, NH4+, PO43−, SO42−, Pb2+, Cd2+) from synthetic wastewater was tested using five different yeast strains: Kluyveromyces marxianus CMGBP16 (P1), Saccharomyces cerevisiae S228C (P2), Saccharomyces cerevisiae CM6B70 (P3), Saccharomyces cerevisiae CMGB234 (P4) and Pichia anomala CMGB88 (P5). The results showed a removal efficiency of up to 70% of COD, 97% of nitrate, 80% of nitrite, 93% of phosphate and 70% of sulfate ions for synthetic wastewater contaminated with Pb2+ (43 mg/L) and Cd2+ ions (39 mg/L). In contrast, the results showed an increase in ammonium ions, especially in the presence of Pb2+ ions. The yeast strains showed a high capacity to reduce Pb2+ (up to 96%) and Cd2+ (up to 40%) ions compared to the initial concentrations. In presence of a crude biosurfactant, the removal efficiency increased up to 99% for Pb2+ and 56% for Cd2+ simultaneously with an increase in yeast biomass of up to 11 times. The results, which were obtained in the absence of aeration and in neutral pH conditions, proved a high potential for practical applications in the biotreatment of the wastewater and the recovery of Pb and Cd ions, with a high benefit–cost ratio.

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Section: Introductionmentioning

confidence: 99%

Bioremediation of Wastewater Using Yeast Strains: An Assessment of Contaminant Removal Efficiency

Nicula

Lungulescu

Rimbu

et al. 2023

IJERPH

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“…Verma et al [35] also found that sand-filter methods are effective for the elimination of heavy metals and organic pollutants from sewage wastewater, making the water fit for the irrigation of agricultural land. Chitosan-based absorbents were also used by different plant researchers for the removal of heavy metals [36][37][38].…”

Section: Discussionmentioning

confidence: 99%

Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Naz

Anjum

Sadiq

et al. 2022

Water

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Sewage wastewater is one of the richest sources of mineral nutrients contributing toward plant growth and yield. However, the accumulation of heavy metals in the edible parts of vegetables and fruits can be dangerous to life. The current research aimed to evaluate the performance of a sand column filter for the elimination of heavy metals from sewage wastewater applied to selected vegetables. The contents of heavy metals, i.e., Pb+2, Ni+2, Cu+2, and Fe+2, were estimated to be higher in untreated sewage wastewater than in treated water. The number of leaves, fresh and dry weights of leaves, roots, and total biomass of lettuce, carrot, and cauliflower were improved due to the irrigation of unfiltered sewage wastewater compared to sewage wastewater. The curd diameter, fresh and dry weights of curd, stem fresh weight of cauliflower, and the root length and diameter of carrot increased after irrigation with the unfiltered sewage wastewater in comparison to the treated sewage wastewater. The accumulation of heavy metals, i.e., Pb+2, Ni+2, Cu+2, and Fe+2, was higher in the roots, leaves, and edible parts of the selected vegetables. In the present study, the Cd+2 and Cr+2 concentrations were not affected by the filtration process through a sand column filter. Conclusively, filtration through a sand column filter is effective for the removal of heavy metals from sewage wastewater used to irrigate agricultural land.

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“…The drawbacks of chitosan are its low sorption capacity, sensitivity to the pH of the aqueous phase, limited reuse, poor mechanical properties, and low stability in acidic media [ 24 ]. To increase the sorption capacity, chitosan is modified with compounds containing donor nitrogen, oxygen, and sulfur atoms, which makes the process more expensive [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

Yudaev

Butorova

Степанов

et al. 2022

Gels

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In this work, a highly efficient and environmentally friendly method for extracting palladium from hydrochloric acid media was developed. The method uses a magnetic sorbent carrying an organophosphorus extractant, which is not washed from the sorbent into the aqueous phase. The extractant was characterized by 1H, 13C, and 31P NMR spectroscopy and MALDI TOF mass spectrometry, and the palladium complex based on it was characterized by IR spectroscopy. According to an in vitro microbiological study, the extractant was non-toxic to soil microflora. It was established that the water uptake and saturation magnetization of the magnetic sorbent were sufficient for use in sorption processes. The sorption efficiency of palladium(II) with the developed sorbent can reach 71% in one cycle. After treatment of the spent sorbent with 5 M hydrochloric acid, palladium was completely extracted from the sorbent. The new sorbent is proposed for the extraction of palladium from hydrochloric acid media obtained by the leaching of electronic waste.

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Xanthate-Modified Magnetic Fe3O4@SiO2-Based Polyvinyl Alcohol/Chitosan Composite Material for Efficient Removal of Heavy Metal Ions from Water

Cited by 33 publications

References 73 publications

Bioremediation of Wastewater Using Yeast Strains: An Assessment of Contaminant Removal Efficiency

Bioremediation of Wastewater Using Yeast Strains: An Assessment of Contaminant Removal Efficiency

Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

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