A review on adsorption of heavy metals from wastewater using carbon nanotube and graphene-based nanomaterials

Chandran, Drisya G.; Muruganandam, Loganathan; Biswas, Rima

doi:10.1007/s11356-023-30192-6

Cited by 6 publications

(2 citation statements)

References 301 publications

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“…The amount of pollutants eliminated is directly proportional to the dosage of adsorbent used in the adsorption process. The increase in dosage results in a greater number of active sites that can bind to heavy metals, hence improving the ability to absorb these metals (T Ahmed et al, 2023;Baby et al, 2022;Chandran et al, 2023;. Nevertheless, even though there is a beneficial impact, the effectiveness of active sites declines when the surface area becomes smaller, worsened by the clumping together of nanoparticles, finally limiting the ability to adsorb.…”

Section: Adsorbent Dosage Impactmentioning

confidence: 99%

“…A clean water source is essential for the long-term survival of life. However, water pollution has become a global issue, threatening the entire ecosystem and life on Earth (Chandran et al, 2023;Rangappa et al, 2024;Rybarczyk et al, 2024). A variety of industrial improvements (Figure 1), including energy plants, mining industries, and environmental disasters caused by climate change, have had a significant impact on the spread of harmful toxins in aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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Engineered nanomaterials have emerged as a promising technology for water treatment, particularly for removing heavy metals. Their unique physicochemical properties enable them to adsorb large quantities of metals even at low concentrations. This review explores the efficacy of various nanomaterials, including zeolites, polymers, chitosan, metal oxides, and metals, in removing heavy metals from water under different conditions. Functionalization of nanomaterials is a strategy to enhance their separation, stability, and adsorption capacity. Experimental parameters such as pH, adsorbent dosage, temperature, contact time, and ionic strength significantly influence the adsorption process. In comparison, engineered nanomaterials show promise for heavy metal remediation, but several challenges exist, including aggregation, stability, mechanical strength, long-term performance, and scalability. Furthermore, the potential environmental and health impacts of nanomaterials require careful consideration. Future research should focus on addressing these challenges and developing sustainable nanomaterial-based remediation strategies. This will involve interdisciplinary collaboration, adherence to green chemistry principles, and comprehensive risk assessments to ensure the safe and effective deployment of nanomaterials in heavy metal remediation at both lab and large-scale levels.

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Section: Adsorbent Dosage Impactmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%