Synthesis of a copper(II) oxide–montmorillonite composite for lead removal

Egirani, Davidson; Poyi, Nanfe. R.; Wessey, Napoleon

doi:10.1007/s12613-019-1788-7

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…The main processing technologies for arsenic removal include electroless deposition, membrane filtration, adsorption processes, and ion exchange [100]. There are a number of works using nanoscale materials as adsorbents of toxic arsenic compounds, such as copper oxide NPs [33,[102][103][104], composites based on nickel ferrite and polyaniline [105], copper and carbon nanotubes [36], zinc sulfide NPs in the cysteine-ZnS:TiO 2 system [106], and Fe/Cu NPs [107]; moreover, a number of review papers are available [108][109][110][111]. Thus, research aimed at preventing arsenic contamination of groundwater and/or mitigating the consequences of such contamination is very remarkable and timely.…”

Section: Flow-through Removal Of As(iii)mentioning

confidence: 99%

“…Despite the aforementioned merits, the application of composite TeMs has rarely been studied for water treatment. There are a limited number of studies in the literature on the use of fixed (supported) copper/copper(II) oxide NSs for the removal of heavy metal ions from aqueous media [ 36 , 37 ]. In this study, we efficiently synthesized composite PET-based TeMs with embedded CuO MTs at temperatures below 150 °C through the thermal oxidation method.…”

Section: Introductionmentioning

confidence: 99%

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Cu/CuO Composite Track-Etched Membranes for Catalytic Decomposition of Nitrophenols and Removal of As(III)

et al. 2020

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One of the promising applications of nanomaterials is to use them as catalysts and sorbents to remove toxic pollutants such as nitroaromatic compounds and heavy metal ions for environmental protection. This work reports the synthesis of Cu/CuO-deposited composite track-etched membranes through low-temperature annealing and their application in catalysis and sorption. The synthesized Cu/CuO/poly(ethylene terephthalate) (PET) composites presented efficient catalytic activity with high conversion yield in the reduction of nitro aryl compounds to their corresponding amino derivatives. It has been found that increasing the time of annealing raises the ratio of the copper(II) oxide (CuO) tenorite phase in the structure, which leads to a significant increase in the catalytic activity of the composites. The samples presented maximum catalytic activity after 5 h of annealing, where the ratio of CuO phase and the degree of crystallinity were 64.3% and 62.7%, respectively. The catalytic activity of pristine and annealed composites was tested in the reduction of 4-nitroaniline and was shown to remain practically unchanged for five consecutive test cycles. Composites annealed at 140 °C were also tested for their capacity to absorb arsenic(III) ions in cross-flow mode. It was observed that the sorption capacity of composite membranes increased by 48.7% compared to the pristine sample and reached its maximum after 10 h of annealing, then gradually decreased by 24% with further annealing.

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Section: Flow-through Removal Of As(iii)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cu/CuO Composite Track-Etched Membranes for Catalytic Decomposition of Nitrophenols and Removal of As(III)

et al. 2020

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“…Iron is a recurring contaminant in delta groundwater. Hydrocarbon sources organic contaminants in groundwater in this region occur as total petroleum hydrocarbon and total hydrocarbon content [5,6].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Contaminants on Groundwater Quality in Rukpokwu, Delta Region of Nigeria

Egirani

Dagogo-Jack

2023

res

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This study investigated the characterization of borehole sediment and the impact of contaminants on groundwater quality in the Rukpokwu Community in the delta of Nigeria. The investigation supported by spatial data supported by GIS techniques provides a data baseline for the monitoring of organo-contaminants in groundwater quality in Rukpokwu. This low pH of the groundwater and irritation of the throat and mouth became a concern to the residents. This study is necessary because of the limited data on the level of organic contamination in groundwater in this section of the delta of Niger in Nigeria. So, there was a need to track the source of contamination in this part of the delta of Niger in Nigeria. These previous studies have suggested a highly permeable open aquifer in similar deltaic terrain. Ten (10) samples of borehole sediment and water collected at 30 m depth were being analyzed for textural and physicochemical characteristics. The parameters analyzed include Iron (Fe), Total Petroleum Hydrocarbon &Total Hydrocarbon Content (i.e., TPH and THC respectively) of borehole sediment in association with groundwater quality. Ten (10) sediment samples collected at a depth of 30m and were being analyzed for mean, sorting, skewness and kurtosis, using standard laboratory procedures. Coarse silt, poorly sorted and negatively skewed were the characteristics of the borehole silt. The Kurtosis suggested the leptokurtic and platykurtic nature of the sediment. The TPH and THC range from 0.58 to 0.85 mg/L and 1.26 to 2.84 mg/L respectively. The Fe and pH range in the sediment were 0.85 to 2.46 mg/L and 4.43 to 6.02 respectively. However, Fe in the groundwater ranges from 0.12 to 0.21 mg/L. The results were above the World Health Organization's acceptable contaminant level. Based on the piece of evidence provided by spatial data mapping and textural parameters, the characteristics of the borehole sediment significantly controlled the ingress of contaminants into the groundwater. The source of groundwater contamination is the abnormal concentrations of organic contaminants. These results significantly impact human health in the food chain. This study provides information to the environmental agency for a clean-up process.

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“…Due to its inherent chemical stability, significant specific surface area, and affordable price, montmorillonite (MMT), a type of clay mineral with three-lamellar structures made up of a Si-O tetrahedron and an Al-O octahedron, plays a significant role in the field of adsorption [ 13 , 14 , 15 ]. However, in practice, natural MMT exhibits some drawbacks, including poor selectivity, a slow mass transfer rate, and a small amount of adsorption capacity [ 16 , 17 , 18 ], which are attributed to the absence of functional groups, narrow interlayer spaces, and a dearth of efficient adsorption sites. It has been shown that intercalation can effectively increase the distance between the layers and introduce some functional groups to boost adsorption or reaction sites for subsequent modification, which might potentially address some of the abovementioned drawbacks [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Salvianolic Acid A Adsorption by Phenylboronic-Acid-Functionalized Montmorillonites with Different Intercalators

Qian

Zeng

et al. 2023

Molecules

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Due to its success in treating cardio-cerebrovascular illnesses, salvianolic acid A (SAA) from Salvia miltiorrhiza is of major importance for effective acquisition. For the adsorption of salvianolic acid, cationic polyelectrolytes, and amino-terminated silane intercalated with phenylboronic-acid-functionalized montmorillonites, known as phenylboronic-acid-functionalized montmorillonites with PEI (PMP) and phenylboronic-acid-functionalized montmorillonites with KH550 (PMK), respectively, were produced. In this paper, detailed comparisons of the SAA adsorption performance and morphology of two adsorbents were performed. PMP showed a higher adsorption efficiency (>88%) over a wide pH range. PMK showed less pH-dependent SAA adsorption with a faster adsorption kinetic fitting in a pseudo-second-order model. For both PMP and PMK, the SAA adsorption processes were endothermic. Additionally, it was clearer how temperature affected PMP adsorption. PMK has a higher adsorption selectivity. This study demonstrates how the type of intercalator can be seen to have an impact on adsorption behavior through various structural variations and offers an alternative suggestion for establishing a dependable method for the synthesis of functional montmorillonite from the intercalator’s perspective.

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Synthesis of a copper(II) oxide–montmorillonite composite for lead removal

Cited by 9 publications

References 26 publications

Cu/CuO Composite Track-Etched Membranes for Catalytic Decomposition of Nitrophenols and Removal of As(III)

Cu/CuO Composite Track-Etched Membranes for Catalytic Decomposition of Nitrophenols and Removal of As(III)

Impacts of Contaminants on Groundwater Quality in Rukpokwu, Delta Region of Nigeria

Comparison of Salvianolic Acid A Adsorption by Phenylboronic-Acid-Functionalized Montmorillonites with Different Intercalators

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