title: Removal of the metal ions from aqueous solutions by nanoscaled low molecular pectin isolated from seagrass Phyllospadix iwatensis.
abstract: Pectins from sea grasses are considered as promising substances with pronounced metal-binding activity. Due to the high molecular weight and heterogeneous structure, the use of pectins for removal of metal ions is difficult. Technology of directed pectin degradation was developed and homogenous degraded nanoscaled pectin polymers were synthesized. Experimental samples of degraded pectin isolated from Phyllospadix iwatensis were tested for their metal binding activity in comparison with native pectin from this seagrass and commercial citrus pectin. The metal uptake of all pectin compounds was highest within the pH range from 4.0 to 6.0. The Langmuir, Freundlich and BET sorption models were applied to describe the isotherms and constants. Results showed that depolymerized pectin exerts highest lead and cadmium binding activity with pronounced affinity. All pectin compounds were suggested to be favorable sorbents. Therefore, it can be concluded that degraded pectin is a prospective material for creation of metal-removing water treatment systems.
authors: Far Eastern Federal University, School of Biomedicine, 8, Sukhanova str., Vladivostok 690091, Russia; A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia.
authors: Elena
authors: E
authors: Khozhaenko
authors: A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia.
authors: Valeri
authors: V
authors: Kovalev
authors: A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia.
authors: Elena
authors: E
authors: Podkorytova
authors: Far Eastern Federal University, School of Biomedicine, 8, Sukhanova str., Vladivostok 690091, Russia; A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia. Electronic address: maxkhot@yandex.ru.
authors: Maksim
authors: M
authors: Khotimchenko
mesh_terms: D001673:Biodegradation, Environmental; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000378:metabolism; D008670:Metals / Q000378:metabolism*; D010368:Pectins / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D035962:Zosteraceae / Q000378:metabolism*
chemical_list: D007477:Ions; D008670:Metals; D010940:Plant Proteins; D014874:Water Pollutants, Chemical; D010368:Pectins
keywords: Equilibrium study; Metal; Molecular weight; Pectin; Wastewater