Enhancement in selective adsorption and removal efficiency of natural clay by intercalation of Zr-pillars into its layered nanostructure

Chauhan, Manisha; Saini, Vipin K.; Suthar, Surindra

doi:10.1016/j.jclepro.2020.120686

Cited by 49 publications

(8 citation statements)

References 35 publications

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“…The suspensions of sorbent with drug solutions were mixed on a rotary tumbler for 24 h. The samples were subjected to centrifugation and filtration. The amount of the drugs adsorbed onto organobeidellite at equilibrium was calculated using the following mass balance equation [35]:…”

Section: Methods and Equipmentmentioning

confidence: 99%

Organobeidellites for Removal of Anti-Inflammatory Drugs from Aqueous Solutions

et al. 2021

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Diclofenac (DC) and ibuprofen (IBU) are widely prescribed non-steroidal anti-inflammatory drugs, the consumption of which has rapidly increased in recent years. The biodegradability of pharmaceuticals is negligible and their removal efficiency by wastewater treatment is very low. Therefore, the beidelitte (BEI) as unique nanomaterial was modified by the following different surfactants: cetylpyridinium (CP), benzalkonium (BA) and tetradecyltrimethylammonium (TD) bromides. Organobeidellites were tested as potential nanosorbents for analgesics. The organobeidellites were characterized using X-ray powder diffraction (XRD), Infrared spectroscopy (IR), Thermogravimetry and differential thermal analysis (TG/DTA) and scanning microscopy (SEM). The equilibrium concentrations of analgesics in solution were determined using UV-VIS spectroscopy. The intercalation of surfactants into BEI structure was confirmed both using XRD analysis due to an increase in basal spacing from 1.53 to 2.01 nm for BEI_BA and IR by decreasing in the intensities of bands related to the adsorbed water. SEM proved successful in the uploading of surfactants by a rougher and eroded organobeidellite surface. TG/DTA evaluated the decrease in dehydration/dehydroxylation temperatures due to higher hydrophobicity. The Sorption experiments demonstrated a sufficient sorption ability for IBU (55–86%) and an excellent ability for DC (over 90%). The maximum adsorption capacity was found for BEI_BA-DC (49.02 mg·g−1). The adsorption according to surfactant type follows the order BEI_BA > BEI_TD > BEI_CP.

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Section: Methods and Equipmentmentioning

confidence: 99%

Organobeidellites for Removal of Anti-Inflammatory Drugs from Aqueous Solutions

et al. 2021

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“…However, although efficient, these processes present limitations with their cost, making their large-scale application unfeasible. Therefore, it emerges as an economically viable alternative, clay minerals use as adsorbents [14,[22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Among clay minerals, montmorillonite is highlighted because it consists of the most abundant mineral present in bentonite rocks. Due to its high surface area, mesoporosity and negative surface charge, [31] it has been studied as a drug adsorbent, [13,[32][33][34] mainly in the removal of antibiotics such as amoxicillin [14,22,23,27].…”

Section: Introductionmentioning

confidence: 99%

Amoxicillin Trihydrate Characterization and investigative adsorption using a Brazilian montmorillonite

et al. 2022

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The objective of this work was to investigate the adsorptive potential of a previously benefited and characterized brazilian montmorillonite sample, regarding amoxicillin trihydrate removal, a zwitterionic species, present in aqueous solutions. 500 mg capsule of antibiotic was properly characterized by XRD, FTIR, SEM/ EDS and surface charge measurement through Zeta potential. Amoxicillin aqueous solution and supernatants from adsorption essays were characterized by Molecular Absorption Spectrophotometry in Ultraviolet-Visible Region (UV/VIS), from 200 to 400 nm. Three investigative essays were performed, varying montmorillonite mass (0.050, 0.525 and 1.000 g) and contact time between substances (10, 95 and 180 min). Amoxicillin sample is crystalline, morphologically prismatic, essentially composed of carbon, nitrogen, sulfur, hydrogen and oxygen. Its zwitterionic character was confirmed by Zeta potential, presenting positive (pH 2 to 4), relatively neutral (pH 4 to 6), and negative (above pH 6) surface charges. Test results indicated that the highest removals (21.4 and 41.8 %) were for the largest clay mineral masses (0.525 and 1.000 g, respectively), with pHs close to amoxicillin pka 1 (2.68). Larger clay mineral masses have more adsorbent sites, which, associated with components opposite charges in desired pH range, promote a greater interaction. Thus, brazilian montmorillonite can promote amoxicillin removal from aqueous solutions.

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“…Therefore, the treatment of industrial and municipal wastewater, landfill leachate, and agricultural runoff before discharging into freshwater systems is necessary to reduce the pollution load to the receiving water bodies. Electrocoagulation (D. Kumar & Sharma, 2019), coagulation (Kumar et al, 2019), sorption (Chauhan et al, 2019, 2020), microbial fuel cells (Kumar et al, 2019), reverse osmosis (Zhao et al, 2020), etc. are some commonly used methods for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic understanding of the pollutant removal and transformation processes in the constructed wetland system

Malyan

Yadav

Sonkar

et al. 2021

Water Environment Research

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Constructed wetland systems (CWs) are biologically and physically engineered systems to mimic the natural wetlands which can potentially treat the wastewater from the various point and nonpoint sources of pollution. The present study aims to review the various mechanisms involved in the different types of CWs for wastewater treatment and to elucidate their role in the effective functioning of the CWs. Several physical, chemical, and biological processes substantially influence the pollutant removal efficiency of CWs. Plants species Phragmites australis, Typha latifolia, and Typha angustifolia are most widely used in CWs. The rate of nitrogen (N) removal is significantly affected by emergent vegetation cover and type of CWs. Hybrid CWs (HCWS) removal efficiency for nutrients, metals, pesticides, and other pollutants is higher than a single constructed wetland. The contaminant removal efficiency of the vertical subsurface flow constructed wetlands (VSSFCW) commonly used for the treatment of domestic and municipal wastewater ranges between 31% and 99%. Biochar/zeolite addition as substrate material further enhances the wastewater treatment of CWs. Innovative components (substrate materials, plant species) and factors (design parameters, climatic conditions) sustaining the long‐term sink of the pollutants, such as nutrients and heavy metals in the CWs should be further investigated in the future. Practitioner points Constructed wetland systems (CWs) are efficient natural treatment system for on‐site contaminants removal from wastewater. Denitrification, nitrification, microbial and plant uptake, sedimentation and adsorption are crucial pollutant removal mechanisms. Phragmites australis, Typha latifolia, and Typha angustifolia are widely used emergent plants in constructed wetlands. Hydraulic retention time (HRT), water flow regimes, substrate, plant, and microbial biomass substantially affect CWs treatment performance.

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Enhancement in selective adsorption and removal efficiency of natural clay by intercalation of Zr-pillars into its layered nanostructure

Cited by 49 publications

References 35 publications

Organobeidellites for Removal of Anti-Inflammatory Drugs from Aqueous Solutions

Organobeidellites for Removal of Anti-Inflammatory Drugs from Aqueous Solutions

Amoxicillin Trihydrate Characterization and investigative adsorption using a Brazilian montmorillonite

Mechanistic understanding of the pollutant removal and transformation processes in the constructed wetland system

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