One-pot synthesis of β-cyclodextrin amended mesoporous cerium(IV) incorporated ferric oxide surface towards the evaluation of fluoride removal efficiency from contaminated water for point of use

Mukhopadhyay, Kankan; Naskar, Animesh; Ghosh, Uday Chand; Sasikumar, Palani

doi:10.1016/j.jhazmat.2019.121235

Cited by 26 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 exhibits adsorption/desorption isotherm type IV which is similar to reported by Al-Khateeb et al [36] with an H3 type hysteresis loop that confirms there were aggregates (loose assemblages) of platelet like particles forming slit-shaped mesopores [40]. The intermediate flat region in the isotherm corresponds to monolayer formation at the lower pressure region of the graph then followed by multilayer [41].…”

Section: Characterization Of Graphene Nanoplateletssupporting

confidence: 78%

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

et al. 2021

View full text Add to dashboard Cite

Recently, pharmaceutical pollutants in water have emerged as a global concern as they give threat to human health and the environment. In this study, graphene nanoplatelets (GNPs) were used to efficiently remove antibiotics sulfamethoxazole (SMX) and analgesic acetaminophen (ACM) as pharmaceutical pollutants from water by an adsorption process. GNPs; C750, C300, M15 and M5 were characterized by high-resolution transmission electron microscopy, Raman spectroscopy, X-ray diffraction and Brunauer–Emmett–Teller. The effects of several parameters viz. solution pH, adsorbent amount, initial concentration and contact time were studied. The parameters were optimized by a batch adsorption process and the maximum removal efficiency for both pharmaceuticals was 99%. The adsorption kinetics and isotherms models were employed, and the experimental data were best analysed with pseudo-second kinetic and Langmuir isotherm with maximum adsorption capacity (Q m ) of 210.08 mg g −1 for SMX and 56.21 mg g −1 for ACM. A regeneration study was applied using different eluents; 5% ethanol-deionized water 0.005 M NaOH and HCl. GNP C300 was able to remove most of both pollutants from environmental water samples. Molecular docking was used to simulate the adsorption mechanism of GNP C300 towards SMX and ACM with a free binding energy of −7.54 kcal mol −1 and −5.29 kcal mol −1 , respectively, which revealed adsorption occurred spontaneously.

show abstract

Section: Characterization Of Graphene Nanoplateletssupporting

confidence: 78%

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the lower pressure region, the graph followed a Type II adsorption pattern, suggesting the formation of a monolayer followed by multilayers. Additionally, the presence of a hysteresis loop in the desorption curve con rmed the occurrence of a type-IV isotherm (Mukhopadhyay et al, 2020). The mesoporous structures (12.90 nm) within Al@zeolite are responsible for the formation of this loop, indicating a higher uoride adsorption capacity in Al@zeolite compared to natural zeolite (Mukhopadhyay et al, 2017).…”

Section: Speci C Surface Area and Pore Size Distributionmentioning

confidence: 79%

“…4. The absorption bands recorded in the spectra at wave number 3449 cm − 1 and 1635 cm − 1 , those are the standard stretching and bending modes of -OH bond vibration, respectively (Mukhopadhyay et al, 2020). Natural zeolite belonged to the silicate class and exhibited a prominent absorption band at 1012 cm − 1 , corresponding to asymmetric Si-O stretching vibrations.…”

Section: Groupsmentioning

confidence: 99%

Adsorption of fluorine from lepidolite hydrometallurgy wastewater by aluminum modified zeolite

Gong,

Zhou,

et al. 2024

Preprint

View full text Add to dashboard Cite

Fluoride contamination is a serious environmental problem in lepidolite hydrometallurgy wastewater. The treatment of the fluoride-bearing wastewater is facing a great challenge due to the presence of co-existed ions including lithium (Li+), rubidium (Rb+), silicate (SiO32−), sulfate radical (SO42−) and so on. However, aluminum-modified zeolite (Al@zeolite) of sufficient hydroxyl group and high adaptability have exhibited unique advantages for fluoride elimination from lepidolite hydrometallurgy wastewater. Al@zeolite was prepared on natural zeolite by an atmospheric process, and it was then used for the adsorption of fluorine from fluoride bearing wastewater produced by lepidolite hydrometallurgy process. The results of material characterization confirmed the successful immobilization of aluminum within the zeolite pores, and indicating the formation of zeolite-Al-OH. The zeolite host significantly enhanced the chemical stability of Al@zeolite against pH changes with a wide pH of 2.0–10.0. The adsorbent possessed a surface area of 33.46 m2/g and demonstrated excellent capacity and selectivity for fluoride adsorption. It is pertinent to mention that maximum adsorption of 98.6% has been observed with a pH value of 6.0 with 20 min time duration with fluoride dosage of 20 mg/L, and the equilibrium concentration dwindled to 0.4 mg/L. The results of fluorine adsorption showed that fluoride uptake onto Al@zeolite agreed well with the pseudo-first-order kinetic model and the Langmuir isotherm model. The reusability of the substance was evaluated for up to eight cycles following consecutive regeneration with 0.2 mol/L AlCl3. The exhausted Al@zeolite was effectively regenerated through a simple alkaline treatment for recycling. The above results verified that Al@zeolite is a new kind of efficient defluoridation adsorbent for lepidolite hydrometallurgy wastewater with practical application prospect.

show abstract

Defluoridation by Sustainable Utilization of Iron Oxide Nanoparticles-Enriched Waste Tea Residue

Lama,

Halder,

Roychowdhury

2024

Springer Proceedings in Earth and Environmental Sciences

View full text Add to dashboard Cite

One-pot synthesis of β-cyclodextrin amended mesoporous cerium(IV) incorporated ferric oxide surface towards the evaluation of fluoride removal efficiency from contaminated water for point of use

Cited by 26 publications

References 40 publications

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

Adsorption of fluorine from lepidolite hydrometallurgy wastewater by aluminum modified zeolite

Defluoridation by Sustainable Utilization of Iron Oxide Nanoparticles-Enriched Waste Tea Residue

Contact Info

Product

Resources

About