Removal of copper ions from wastewater via adsorption on modified hematite (α-Fe2O3) iron oxide coated sand

Khan, Junaid; Lin, Shan; Nizeyimana, Jean Claude; Wu, Yongbo; Wang, Qi; Liu, Xiangru

doi:10.1016/j.jclepro.2021.128687

Cited by 61 publications

(18 citation statements)

References 58 publications

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“…Similar results were reported by L. YOUCEF, S. ACHOUR in the study of copper removal by chemical precipitation and adsorption processes [25]. Junaid Khan et al also showed in the study of copper removal on modified hematite (α-Fe 2 O 3 ) iron oxide coated sand that the initial copper concentration, adsorbent dose and pH significantly influenced the copper removal efficiency [26].…”

Section: Discussionsupporting

confidence: 84%

Modelling and Optimisation of Copper Adsorption in Solution by the Response Surface Method

Ba¹,

Touré²,

Ndiaye³

et al. 2023

ACES

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Copper is considered a heavy metal that can be toxic at certain concentrations and its presence in water is a potential threat to public health. These heavy metals also contribute to a remarkable degradation of the environment, hence the need for effective treatment methods to remove them. In this study, a mixture of titaniferous sand and calcium silicate was used as adsorbent material to eliminate copper in solution. The calcium silicate was synthesised from fluosilicic acid, which is a by-product of phosphoric acid manufacture. The titaniferous sand is a residue from a mining industry. Both adsorbents were characterised by infrared spectroscopy and X-ray fluorescence to determine their compositions and physicochemical properties. The response surfaces, through the Box-Behnken model, were used to model and optimise various adsorption parameters, namely initial copper concentration (A: 60 -200 mg/L), adsorbent dose (B: 0.1 -0.6 g) and pH (C: 4 -10). The copper removal efficiency (98.92%), after statistical analysis, was obtained under the following optimal conditions: an adsorbent dose of 0.55 g, an initial copper concentration of 197.25 mg/L and a pH of 9.85. The study of the effects of the operating parameters showed that they had a positive effect on the copper removal efficiency.

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Section: Discussionsupporting

confidence: 84%

Modelling and Optimisation of Copper Adsorption in Solution by the Response Surface Method

Ba¹,

Touré²,

Ndiaye³

et al. 2023

ACES

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show abstract

“…If the concentration of Cu 2+ in daily drinking or surface water is too high, or the content of Cu 2+ in food is high after absorption and enrichment, which can cause various diseases, such as anemia, osteoporosis, and even liver cancer [ 24 ]. There are many methods to remove heavy metal Cu 2+ from water, including membrane separation [ 25 ], electrochemical methods [ 26 ], chemical precipitation [ 27 ], adsorbent adsorption [ 28 , 29 , 30 , 31 ], etc. Among them, the sorption method, with the advantages of high efficiency, fewer by-products and simple equipment, has been widely employed in water treatment [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Molybdenum Disulfide with Different Nanostructures and Its Adsorption Performance for Copper (Ⅱ) Ion in Water

Yao

Shi

2023

Nanomaterials

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The environmental problems in the world are attracting increasing amounts of attention, and heavy metal pollution in the water has become one of the focuses of the ecological environment. Molybdenum disulfide (MoS2) has excellent adsorption performance because of its extremely high specific surface area and unique active site structure, which has attracted an increasing amount of attention in the field of heavy metal disposal in various types of water. In this paper, two sorts of MoS2 nanoparticles, spherical and lamellar, were synthesized by different chemical methods. Their morphology and structure were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and a Raman spectrometer. The adsorption properties of two sorts of MoS2 nanoparticles for copper (Ⅱ) ions in water were investigated by changing the pH value, adsorption time, initial concentration of solution, adsorption temperature, etc. Finally, the adsorption mechanism was analyzed by kinetic, isothermal, and thermodynamic models. The results show that two microstructures of MoS2 nanoparticles can be used as efficient adsorption materials for removing heavy metal ions from water, although there are differences in adsorption capacity between them, which expands the theoretical basis of heavy metal adsorption in a water environment.

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“…Numerous technologies are currently used to remove Cu(II) from water, including chemical precipitation [8][9][10], membrane separation [11], electrochemical means [12,13] and adsorption [14][15][16]. Compared with chemical precipitation, the adsorption method has a wider range of applications, does not generate secondary pollution and the adsorbent after adsorption can also be recycled.…”

Section: Introduction A̧mentioning

confidence: 99%

A Mesoporous Faujasite Prepared by Space-Confined Method for Highly Effective Selectivity of Copper Ions

Chen

Wei

Dong

et al. 2022

Water

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The discharge of copper ion (Cu(II)) into natural waters can lead to serious environmental and health problems; however, an abundantly porous hierarchical adsorbent, such as faujasite (FAU), can rapidly remove unwanted Cu(II). In this research, a hierarchically structured, abundantly mesoporous faujasite (FAU) was fabricated from industrial-waste lithium-silicon powder (LSP), with the addition of biochar and graphene oxide (GO) via hydrothermal synthesis without high-temperature calcination. The results demonstrated that just a small amount of biochar or GO can significantly improve the mesopore volume (0.14 cm³/g) and the Cu(II) adsorption capacity (115.65 mg/g) of composite FAU. In particular, careful examination of the properties of the composite FAU showed that the biochar and GO had favorably affected the growth of the zeolite crystals, thus promoting the formation of the FAU skeleton structure, ion-exchange sites and Si-OH. The composite FAU exhibited superior adsorption capacities and highly effective Cu(II) selectivity. Thus, the findings of this study provide a novel and cost-effective avenue for the synthesis of composite FAU with high copper-selective removal capacity.

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Removal of copper ions from wastewater via adsorption on modified hematite (α-Fe2O3) iron oxide coated sand

Cited by 61 publications

References 58 publications

Modelling and Optimisation of Copper Adsorption in Solution by the Response Surface Method

Modelling and Optimisation of Copper Adsorption in Solution by the Response Surface Method

Preparation of Molybdenum Disulfide with Different Nanostructures and Its Adsorption Performance for Copper (Ⅱ) Ion in Water

A Mesoporous Faujasite Prepared by Space-Confined Method for Highly Effective Selectivity of Copper Ions

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