Phosphate functionalised titania for heavy metal removal from acidic sulfate solutions

Hallam, Laura; Papasergio, Antonia E.; Lessio, Martina; Veliscek-Carolan, Jessica

doi:10.1016/j.jcis.2021.05.047

Cited by 17 publications

(5 citation statements)

References 54 publications

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“…Porous titanium dioxide (TiO 2 ) is considered an ideal skeleton material for removing heavy metals because of its excellent chemical stability, low cost, versatility, non-toxicity (Correa et al, 2015;Hallam et al, 2021), and poor hydrolysis stability (Gewert et al, 2015). Functionalization of the surface titania via various anchoring groups for improving adsorption performance of heavy metals, such as silane, carboxylate, amino has been previously demonstrated (Pujari et al, 2014).…”

Section: Pamams/titanium Dioxide Compositesmentioning

confidence: 99%

A Review: Adsorption and Removal of Heavy Metals Based on Polyamide-amines Composites

et al. 2022

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In recent years, the problem of heavy metal pollution has become increasingly prominent, so it is urgent to develop new heavy metal adsorption materials. Compared with many adsorbents, the polyamide-amine dendrimers (PAMAMs) have attracted extensive attention of researchers due to its advantages of macro-molecular cavity, abundant surface functional groups, non-toxicity, high efficiency and easy modification. But in fact, it is not very suitable as an adsorbent because of its solubility and difficulty in separation, which also limits its application in environmental remediation. Therefore, in order to make up for the shortcomings of this material to a certain extent, the synthesis and development of polymer composite materials based on PAMAMs are increasingly prominent in the direction of solving heavy metal pollution. In this paper, the application of composites based on PAMAMs and inorganic or organic components in the adsorption of heavy metal ions is reviewed. Finally, the prospects and challenges of PAMAMs composites for removal of heavy metal ions in water environment are discussed.

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Section: Pamams/titanium Dioxide Compositesmentioning

confidence: 99%

A Review: Adsorption and Removal of Heavy Metals Based on Polyamide-amines Composites

et al. 2022

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“…The aim of this paper is to highlight the use of wastes as an alternative raw material in building materials. The practical experimentation analysis approach can be used to solve this problem [10,11]. Therefore, we are interested in studying the environmental impacts of phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Characterization of phosphate wastes of Djebel Onk mining complex for a sustainable environmental management

Salhi,

Nettour,

Chettibi

et al. 2023

TAPR

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The objects of the research are phosphate ore rejections – industrial waste resulting from the treatment of phosphate ore by different processes (particle size separation, calcination, physicochemical process, electrostatically process, etc.). These discharges are generally stored in specially constructed sedimentation ponds. However, its storage for a long period leads to serious environmental problems because they contain heavy and radioactive metals that affect nearby communities. They contaminate groundwater and surface water through the infiltration of caustic solution laden with rare metals. To remedy these environmental disasters and manage these concerns, it is necessary to upgrade the discharges from the Djebel Onk complex and give an added value to the national economy. The start-up of the Djebel El Onk phosphate complex, in the province of Tebessa was in 1965, since that date, all the waste resulting from the beneficiation process has been dumped in the valley adjacent to the complex without any treatment or recycling, it should be noted that the Djebel Onk phosphate complex generates huge quantities of phosphate sludge (more than 4000 tons per day). This waste is relatively rich in useful substance. The results of chemical analyzes reveal that these sludge’s contain around 20.2 % of phosphate (P2O5) with the presence of different heavy metals such as Uranium, Cadmium, Zinc, Copper, and Arsenic etc. Those metals threaten life of local residents and affects vegetation, livestock in nearby populated areas. However, this work systematically reviews the mineralogical and chemical characterization of the phosphate sludge rejected by the Djebel Onk treatment complex to develop a suitable method for their revaluation. In our work, in this viable environmental perspective, we try to highlight the use of wastes as an alternative raw material in building materials. The impact of heavy metals on the environment and health is determined by the chemical species, concentration, bioavailability and transport through food chains, unless they are released into nature due to the consequences harm they create. Certain elements, such as mercury, lead, cadmium, zinc, copper, etc., have no function in maintaining body balance and are immediately dangerous.

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“…One of the most effective methods is to doping elements on the surface of inorganic nanoparticles to form a modification layer. In this way, the stability of nanoparticles is enhanced, the agglomeration between nanoparticles is significantly reduced, and their ability to absorb organic compounds and metal ions is improved. − …”

Section: Introductionmentioning

confidence: 99%

“…In this way, the stability of nanoparticles is enhanced, the agglomeration between nanoparticles is significantly reduced, and their ability to absorb organic compounds and metal ions is improved. 12 − 17 …”

Section: Introductionmentioning

confidence: 99%

Template-Free Synthesis of Phosphorus/Nitrogen-Doped Mesoporous Titania Materials with Excellent Adsorption for Lysozymes

Wang,

Zhang,

Liu

et al. 2023

ACS Omega

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Element-doped mesoporous titanium oxide has significant advantages in substance separation and adsorption due to its larger specific surface area and stronger hydrophobicity. However, its current synthesis methods have limitations such as complicated preparation process, high production cost, or not being environmentally friendly, and the synthesis of elementally doped titanium oxide materials by simple, low-cost, and green means is the research goal of this study. In this study, phosphorus-doped mesoporous titanium oxides (TiP) materials have been synthesized through a facile template-free method in an ethanol system, which were further modified by nitrogen doping with the use of urea as the nitrogen source. Both the synthesized TiP and P–N codoped sample (N-TiP) are amorphous with mesopores. It was revealed by FTIR and XPS spectra that the formation of Ti–O–P and −O–Ti–N bonds in the synthesized samples was due to the partial substitution of phosphorus for titanium in Ti–O–Ti bonds in mesoporous titanium oxide, while nitrogen replaced some oxygen in the −O–Ti–O bonds in the form of anions. The TiP sample was estimated by the BET method to have a relatively large surface area, up to 317 m 2 /g. The adsorption of TiP and N-TiP materials to lysozyme protein in a buffer solution at different pH values showed that the adsorption of TiP to lysozyme protein was larger, which was 32.68 μmol/g. It shows that TiP has potential as a multifunctional adsorbent.

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Phosphate functionalised titania for heavy metal removal from acidic sulfate solutions

Cited by 17 publications

References 54 publications

A Review: Adsorption and Removal of Heavy Metals Based on Polyamide-amines Composites

A Review: Adsorption and Removal of Heavy Metals Based on Polyamide-amines Composites

Characterization of phosphate wastes of Djebel Onk mining complex for a sustainable environmental management

Template-Free Synthesis of Phosphorus/Nitrogen-Doped Mesoporous Titania Materials with Excellent Adsorption for Lysozymes

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