Polyamidoamine-Functionalized Graphene Oxide–SBA-15 Mesoporous Composite: Adsorbent for Aqueous Arsenite, Cadmium, Ciprofloxacin, Ivermectin, and Tetracycline

Industrial & Engineering Chemistry Research, Journal Year: 2021, Volume and Issue: 60(10), P. 3957 - 3968

Published: Jan. 20, 2021

Polyamidoamine functionalized graphene oxide–SBA-15 mesoporous composite (PGOSBA) was synthesized, characterized, and examined for aqueous adsorption of metals (As(III) Cd(II)) emerging pollutants (ciprofloxacin, ivermectin, tetracycline). The data were explained with kinetics isotherm models. PGOSBA is mesoporous, but has lower Brunauer–Emmett–Teller (BET) surface area pore dimensions in comparison to the amine-functionalized SBA-15 (SBA-15-NH2). Infrared spectra peaks peculiar individual constituents observed PGOSBA, which exhibited thermal stability in-between those its SBA-15-NH2 oxide (GO) constituents. basic structural lattices unaffected morphology, covered by GO sheet-like structures. Cd(II), As(III), ciprofloxacin, ivermectin attained equilibrium at 240, 20, 180, 720 min, respectively. rate Cd(II) fitted pseudo-second-order model, while fractal model better. one optimum pH (pH 5), two points recorded (a peak 3 a higher 9). processes spontaneous endothermic; an increase temperature up ≈30 °C slightly enhanced (≤5%), as well (≥15%), extent; (≈40 °C) may result (≤2%) than °C. Multiple sorption phenomena including electrostatic interactions, multilayer due π–π filling involved removal processes. capacities tetracycline, ciprofloxacin are 92.4, 22.3, 29.2, 24.6 mg/g, respectively, it 291.8 μg/g ivermectin. adsorbent could low-concentration solutions (<80 μg/L) less 8.5 μg/L. reusability over three consecutive cycles adsorption, desorption, reuse ≥95%. These results imply that would be economically viable potential use water treatment

Language: Английский

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Partitioning, bioavailability and effects of oestrogens and xeno-oestrogens in the aquatic environment

Journal of the Marine Biological Association of the United Kingdom, Journal Year: 2005, Volume and Issue: 85(1), P. 1 - 31

Published: Feb. 1, 2005

This review provides insights into the distribution and impact of oestrogens xeno-oestrogens in aquatic environment highlights some significant knowledge gaps our understanding endocrine disrupting chemicals. Key areas uncertainty assessment risk include role estuarine sediments mediating fate bioavailability environmental (xeno)oestrogens (notably their transfer to benthic organisms food chains), together with evidence for disruption invertebrate populations. Emphasis is placed on using published information interpret behaviour effects a small number ‘model compounds’ thought contribute oestrogenic nature; namely, natural steroid 17β-oestradiol (E2) synthetic hormone 17α-ethinyloestradiol (EE2), alkylphenols octyl- nonyl-phenol (OP, NP) as oestrogen mimics. Individual sections are devoted sources concentrations waterways, sediment partitioning persistence, bioaccumulation rates routes, assays biomarkers oestrogenicity, and, finally, synopsis reproductive ecological species.

Language: Английский

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Development of molecularly imprinted electrochemical sensor with titanium oxide and gold nanomaterials enhanced technique for determination of 4-nonylphenol

Sensors and Actuators B Chemical, Journal Year: 2010, Volume and Issue: 152(2), P. 292 - 298

Published: Dec. 23, 2010

Language: Английский

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Studies of Endocrine Disruptors: Nonylphenol and Isomers in Biological Models

Environmental Toxicology and Chemistry, Journal Year: 2023, Volume and Issue: 42(7), P. 1439 - 1450

Published: April 14, 2023

Certain emerging pollutants are among the most widely used chemicals globally, causing widespread concern in relation to their use products devoted cleaniness and asepsis. Nonylphenol ethoxylate (NPEOn) is one such contaminant, along with its degradation product, nonylphenol, an active ingredient presents nonionic surfactants as herbicides, cosmetics, paints, plastics, disinfectants, detergents. These metabolites commonly found environmental matrices. NPEOn, used, particularly concerning, given role endocrine disruptors chemical possible neurotoxic effects recorded several biological models, primarily aquatic organisms. Limiting detecting these compounds remain of paramount importance. The objective present review was evaluate toxic nonylphenol NPEOn different models. Environ Toxicol Chem 2023;42:1439-1450. © 2023 SETAC.

Language: Английский

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Behavior of alkylphenol polyethoxylate metabolites during soil aquifer treatment

Water Research, Journal Year: 2003, Volume and Issue: 37(15), P. 3672 - 3681

Published: June 30, 2003

Language: Английский

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