Adsorptive removal of heavy metals from aqueous solutions: Progress of adsorbents development and their effectiveness

Ismail, Usman M.; Vohra, Muhammad S.; Onaizi, Sagheer A.

doi:10.1016/j.envres.2024.118562

Cited by 31 publications

(2 citation statements)

References 380 publications

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“…The ecological safety issues arising from the extensive discharge of heavy metal wastewater constitute a significant global challenge [ 1 , 2 , 3 ]. Moreover, the complexity of this issue is heightened by the fact that heavy metal pollution generally results from the coexistence of multiple heavy metals, rather than a single contaminant.…”

Section: Introductionmentioning

confidence: 99%

Conversion of Phosphogypsum into Porous Calcium Silicate Hydrate for the Removal and Recycling of Pb(II) and Cd(II) from Wastewater

Wang,

Chen,

et al. 2024

Molecules

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The discharge of lead and cadmium wastewater, along with the pollution caused by phosphogypsum, represents a particularly urgent environmental issue. This study employed a straightforward hydrothermal method to convert phosphogypsum into porous calcium silicate hydrate (P-CSH), which was then used to remove and recover Pb(II) and Cd(II) from wastewater. The adsorption capacities of P-CSH for Pb(II) and Cd(II) were notably high at 989.3 mg/g and 290.3 mg/g, respectively. The adsorption processes adhered to the pseudo-second-order kinetics model and the Langmuir isotherm model. Due to identical adsorption sites on P-CSH for both Pb(II) and Cd(II), competitive interaction occurred when both ions were present simultaneously. Additionally, the adsorption efficacy was minimally impacted by the presence of common coexisting cations in wastewater. The dominant mechanisms for removing Pb(II) and Cd(II) via P-CSH were chemical precipitation and surface complexation. Moreover, the adsorbed heavy metals were efficiently separated and reclaimed from the wastewater through a stepwise desorption process. The primary components of the residue from stepwise desorption were quartz and amorphous SiO2. Following dissolution via pressurized alkaline leaching, this residue could be recycled for synthesizing P-CSH. This research offered a new strategy for the resourceful use of phosphogypsum and heavy metal wastewater.

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Section: Introductionmentioning

confidence: 99%

Conversion of Phosphogypsum into Porous Calcium Silicate Hydrate for the Removal and Recycling of Pb(II) and Cd(II) from Wastewater

Wang,

Chen,

et al. 2024

Molecules

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“…However, these treatment methods have disadvantages, because they can produce secondary contaminants and require a high operating cost [10,11]. Unlike other technologies for treating contaminated water, adsorption stands out as an efficient process, as it is easy to operate, economical, abundant in raw materials, and easy to recover [8,12], with activated carbon and zeolite being the materials most used in the removal of contaminants by adsorption due to their superior adsorbent characteristics compared to other materials, but it is essential to keep in mind that they also have a higher economic value [13][14][15]. Studies have been performed to develop more economical and sustainable adsorbent materials to overcome these challenges, made from biological agents such as algae, fungi, bacteria and multiple agro-industrial wastes [16].…”

Section: Introductionmentioning

confidence: 99%

Biocomposite Based on Polyhydroxybutyrate and Cellulose Acetate for the Adsorption of Methylene Blue

Villabona-Ortíz,

Ortega-Toro,

Pedroza-Hernández

2024

J. Compos. Sci.

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Industrialization and globalization have caused severe environmental problems, such as contaminating water bodies by toxic agents from various industries, generating a significant loss of biodiversity and health risks. Globally, approximately 80% of wastewater is discharged without treatment, worsening the situation. However, in Colombia, initiatives have been taken to improve wastewater management, with ambitious investments and targets to improve treatment infrastructure. Recently, advanced technologies have been developed to treat wastewater, including more efficient and sustainable biological methods, such as using coconut-derived adsorbent biomaterials, rich in useful properties for the adsorption of pollutants in solutions. This research focuses on developing a composite biomaterial using cellulose acetate (CA) extracted from coconut mesocarp and polyhydroxy butyrate (PHB), by the casting method, to treat wastewater. Adsorption tests with the tracer methylene blue (MB) were carried out in the Energy and Environment laboratory of the University of Cartagena. For this, MB solutions were prepared with 5 to 50 ppm concentrations. The analyses showed that the composite biomaterial is thermally stable and has good homogeneity and porosity. At a concentration of 40 ppm and a dosage of 10 mg of adsorbent, the adsorption efficiency was 89%, with an adsorption capacity of 35.98 mg/g. The above indicates that the composite biomaterial is presented as a sustainable, improved, and efficient solution to remove contaminants from wastewater, benefiting the environment and human health.

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Oxygen vacancies engineering of ternary Co3O4/rGO/PANI composite for environmental and biomedical applications

Shahid,

Kayani,

Akram

et al. 2024

Clean Techn Environ Policy

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Adsorptive removal of heavy metals from aqueous solutions: Progress of adsorbents development and their effectiveness

Cited by 31 publications

References 380 publications

Conversion of Phosphogypsum into Porous Calcium Silicate Hydrate for the Removal and Recycling of Pb(II) and Cd(II) from Wastewater

Conversion of Phosphogypsum into Porous Calcium Silicate Hydrate for the Removal and Recycling of Pb(II) and Cd(II) from Wastewater

Biocomposite Based on Polyhydroxybutyrate and Cellulose Acetate for the Adsorption of Methylene Blue

Oxygen vacancies engineering of ternary Co3O4/rGO/PANI composite for environmental and biomedical applications

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