Enhancement of cadmium uptake by Amaranthus caudatus, an ornamental plant, using tea saponin

WOS: 000376684900004PubMed: 27142816In this study, tea saponin (TS) was extracted from tea camellia seed by microwave-assisted extraction. The potential of TS was compared with ethylenediaminetetracetic acid (EDTA), which is used as a common chemical agent to enhance uptake of cadmium (Cd) by Amaranthus caudatus, an ornamental plant in the natural vegetation of Turkey under pot conditions. The enrichment coefficient (EC) and translocation factor (TF) values were calculated to evaluate the removal efficiency of the TS and EDTA. The results showed that an increase in both TS and EDTA concentration significantly increased Cd uptake by A. caudatus, accumulating Cd in different parts of the plant. Higher EC and TF values obtained from stems, leaves, and inflorescences of A. caudatus showed that this plant might be cultivated and used as a hyperaccumulator in the uptake of Cd from the Cd contaminated soils. Thus, the present technique can efficiently reduce the metal load in the food chain; hence, it could be applied in catchment areas of urban cities where Cd contamination has become an unavoidable factor

Synthesis and Characterization of 1-(2-Furoyl) Piperazine Calix[4]arene for the Preconcentration of Metal Ions

Sayin, Serkan/0000-0003-0518-3208WOS: 000416519900009A new 1-(2-furoyl) piperazine-appended calix[4]arene derivative 3 has been synthesized and characterized using H-1 nuclear magnetic resonance (H-1 NMR) and elemental analysis. Its metal ion extraction capabilities toward Pb2+, Cu2+, Ni2+, Co2+, Cd2+, and Zn2+ ions havebeen evaluated. The results show that 1-(2-furoyl) piperazineappended calix[4]arene derivative 3 exhibited 95% extraction recovery but also selectivity toward Cd2+ and other ions.Research Foundation of Giresun University [FEN-BAP-A-200515-69]The authors are grateful for the financial support provided by The Research Foundation of Giresun University (FEN-BAP-A-200515-69)

Synthesis, characterization, biological activity, and DFT-reactivity assessment of Mn(II), Co(II), and Cu(II) complexes of a new N2O tridentate Schiff base

Guder, Aytac/0000-0002-1190-8749;WOS: 000397491800050Three new homoleptic Schiff base: metal(II) complexes, bis{2-[(pyridin-2-yl) methylene-amino] naphthoxometal(II)} [M(npa)(2)], (M = Mn(II) (1), Co(II) (2), Cu(II) (3), npa is monoanion of 2-[(pyridin-2-yl)methyleneamino]naphthol), have been prepared and characterized by elemental analyses, FT-IR, H-1 and C-13 NMR, and HR-MS-TOF. Antimicrobial activity of the title compounds was tested against six standart bacteria and two standart fungi isolates by microdilution broth assay with Alamar Blue Dye. Biological activity of the complexes has been estimated by using Fukui reactivity indices and frontier molecular orbitals in the framework of conceptual density functional theory.Giresun UniversityGiresun University [FEN-BAP-A-250414-50]This study was supported by Giresun University (no.FEN-BAP-A-250414-50) Scientific Research Project

Investigation of Competitive and Noncompetitive Adsorption of Some Heavy Metals Ions on Leucodon sciuroides (Hedw.) Schwägr

Heavy metals are an important pollutant group. Adsorption is one of the methods used to remove heavy metals from the environment. Mosses were preferred as bio-indicators because they have the capacity to accumulate many elements by their high surface-to-volume ratio. Leucodon sciuroides (Hedw.) Schwägr. (LS) are mosses that play an important part of the ecosystem and are collected from the Ida Mountain (Kazdag) region of Çanakkale (Turkey). For the purpose of determining the adsorption capacity of heavy metal ion (Pb2+, Cd2+, Co2+, Ni2+, Zn2+, and Cu2+) analysis conditions, pH, contact time, and adsorbent amounts were determined and the maximum adsorption capacity was calculated with the help of the relevant isotherms. Heavy metal concentrations were determined by inductively coupled plasma-mass spectrometry. It was determined that the optimum adsorption for mosses was 30 min at pH = 6.0 (the pH at which maximum adsorption occurs). The adsorption event shows that some divalent cations fit the Freundlich isotherm and some fit the Langmuir isotherm model. A pseudo-second-order reaction best fits the kinetic data for metal ions. Among the six metal ions studied, the highest adsorption was observed in Pb2+ and Cu2+ cations. According to the competitive adsorption results, the moss has a great advantage in determining the Pb2+ and Cu2+ cations industrially as well as other metals and in removing other metal impurities from the environment. Also, LS is exploited as a biosorbent to remove metal ions from aqueous solutions and can be used as a biomarker