Comparison of surface-engineered superparamagnetic nanosorbents with low-cost adsorbents of cellulose, zeolites and biochar for the removal of organic and inorganic pollutants: a review

Vishnu, Dhanya; Dhandapani, Balaji; Panchamoorthy, Gopinath Kannappan; Vo, Dai‐Viet N.; Ramakrishnan, Shankar

doi:10.1007/s10311-021-01201-2

Cited by 32 publications

(7 citation statements)

References 148 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The composition of biomass and the carbonization method are two aspects that influence the manufacture of the surface of biochar. Pyrolysis and gasification are two common pro-cesses for converting biomass to biochar [16]. Many extensively utilized biochar modification procedures, such as alkalinity and/or acid, metal salts, oxidizing agent, and steam and gas purge modification, have improved its sorption capacity for target pollutants [17].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Effective Biochar Biosorbent Derived from Agricultural Waste to Remove Cationic Dyes from Wastewater

et al. 2022

View full text Add to dashboard Cite

The main aim of this work is to treat sugarcane bagasse agricultural waste and prepare an efficient, promising, and eco-friendly adsorbent material. Biochar is an example of such a material, and it is an extremely versatile and eco-friendly biosorbent to treat wastewater. Crystal violet (CV)-dye and methylene blue (MB)-dye species are examples of serious organic pollutants. Herein, biochar was prepared firstly from sugarcane bagasse (SCB), and then a biochar biosorbent was synthesized through pyrolysis and surface activation with NaOH. SEM, TEM, FTIR, Raman, surface area, XRD, and EDX were used to characterize the investigated materials. The reuse of such waste materials is considered eco-friendly in nature. After that, the adsorption of MB and CV-species from synthetically prepared wastewater using treated biochar was investigated under various conditions. To demonstrate the study’s effectiveness, it was attempted to achieve optimum effectiveness at an optimum level by working with time, adsorbent dose, dye concentration, NaCl, pH, and temperature. The number of adsorbed dyes reduced as the dye concentrations increased and marginally decreased with NaCl but increased with the adsorbent dosage, pH, and temperature of the solution increased. Furthermore, it climbed for around 15 min before reaching equilibrium, indicating that all pores were almost full. Under the optimum condition, the removal perecentages of both MB and CV-dyes were ≥ 98%. The obtained equilibrium data was represented by Langmuir and Freundlich isotherm models. Additionally, the thermodynamic parameters were examined at various temperatures. The results illustrated that the Langmuir isotherm was utilized to explain the experimental adsorption processes with maximum adsorption capacities of MB and CV-dyes were 114.42 and 99.50 mgg−1, respectively. The kinetic data were estimated by pseudo-first and pseudo-second-order equations. The best correlation coefficients of the investigated adsorption processes were described by the pseudo-second-order kinetic model. Finally, the data obtained were compared with some works published during the last four years.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Effective Biochar Biosorbent Derived from Agricultural Waste to Remove Cationic Dyes from Wastewater

et al. 2022

View full text Add to dashboard Cite

show abstract

“…(Mo et al, 2022;Umejuru et al, 2023;B Zhao et al, 2024). Various studies have distinguished natural and synthetic zeolites, highlighting synthetic versions' superior effectiveness in metal ion removal (Vishnu et al, 2021;Jarosz et al, 2022). Yurekli (2016) demonstrated that incorporating zeolite nanoparticles (NaX) into polysulfone membranes effectively removes lead and nickel from water-based solutions, enhancing metal impurity elimination and reducing membrane pressure.…”

Section: Nanomaterialsmentioning

confidence: 99%

“…These hybrid materials offer tailored properties that mitigate challenges related to heavy metal contamination, such as pH sensitivity, competition from other ions, and environmental stability. Recent investigations (Raza et al, 2023;Vinoth and Wang, 2023) suggest that metallic and metal oxide nanoparticles hold promise in removing heavy metals from water. However, due to their inherent instability and difficulties in separation, pure metal nanoparticles are not ideal for use as adsorbents.…”

Section: Metal-based Nanomaterials For Efficient Heavy Metal Remediationmentioning

confidence: 99%

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

Karnwal,

Malik

2024

Front. Environ. Sci.

View full text Add to dashboard Cite

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.

show abstract

“…A lot of review articles are given for materials and methods which have been cast-off for the degradation and adsorption of those organic contaminants (Crini 2021 ; Kumar et al 2021 ; Ponnuchamy et al 2021 ; Vishnu et al 2021 ). During the last few decades, heterogenous photocatalysis has been expanded rapidly for environmental remediation due to its simple design, stability, low set-up cost, and whole mineralization of pollutants into safe by-products (Luo et al 2019 ; Madima et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Conducting polymers/zinc oxide-based photocatalysts for environmental remediation: a review

et al. 2022

View full text Add to dashboard Cite

The accessibility to clean water is essential for humans, yet nearly 250 million people die yearly due to contamination by cholera, dysentery, arsenicosis, hepatitis A, polio, typhoid fever, schistosomiasis, malaria, and lead poisoning, according to the World Health Organization. Therefore, advanced materials and techniques are needed to remove contaminants. Here, we review nanohybrids combining conducting polymers and zinc oxide for the photocatalytic purification of waters, with focus on in situ polymerization, template synthesis, sol–gel method, and mixing of semiconductors. Advantages include less corrosion of zinc oxide, less charge recombination and more visible light absorption, up to 53%.

show abstract

Comparison of surface-engineered superparamagnetic nanosorbents with low-cost adsorbents of cellulose, zeolites and biochar for the removal of organic and inorganic pollutants: a review

Cited by 32 publications

References 148 publications

Fabrication and Characterization of Effective Biochar Biosorbent Derived from Agricultural Waste to Remove Cationic Dyes from Wastewater

Fabrication and Characterization of Effective Biochar Biosorbent Derived from Agricultural Waste to Remove Cationic Dyes from Wastewater

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

Conducting polymers/zinc oxide-based photocatalysts for environmental remediation: a review

Contact Info

Product

Resources

About