Wastewater Treatment from Lead and Strontium by Potassium Polytitanates: Kinetic Analysis and Adsorption Mechanism; Processes; Vol. 8, iss. 2

Wastewater Treatment from Lead and Strontium by Potassium Polytitanates: Kinetic Analysis and Adsorption Mechanism; Processes; Vol. 8, iss. 2

Detalhes bibliográficos
Parent link:Processes
Vol. 8, iss. 2.— 2020.— [217, 13 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Outros Autores: Ermolenko A. V. Anna Valerjevna, Shevelev A. A. Aleksandr Afanasjevich, Vikulova M. A. Mariya Aleksandrovna, Blagova T. A. Tatjyana Aleksandrovna, Altukhov S. Sergey, Gorokhovsky A. V., Godymchuk (Godimchuk) A. Yu. Anna Yuryevna, Burmistrov I. N. Igor Nikolaevich, Offor P. O. Peter Ogbuna
Resumo:Title screen
The reduction of heavy and radioactive metal pollution of industrial wastewater remains a vital challenge. Due to layered structure and developed surface, potassium polytitanate had potential in becoming an effective sorbent for metal extraction from wastewater in the presented paper. On the basis of the different sorption models, this paper studied the mechanism of Pb2+ and Sr2+ cation extraction from aqueous solution by non-crystalline potassium polytitanate produced by molten salt synthesis. The ion exchange during metal extraction from model solutions was proven by kinetic analysis of ion concentration change, electronic microscopy, and X-ray fluorescence analysis of sorbent before and after sorption, as well as by theoretical modeling of potassium, lead, and strontium polytitanates. The sorption was limited by the inner diffusion in the potassium polytitanate (PPT) interlayer space, as was shown using the Boyd diffusion model. The sorption processes can be described by Ho and McKay’s pseudo-second-order model compared to the Lagergren pseudo-first-order model according to kinetic analysis. It was found that the ultimate sorption capacity of synthesized sorbent reached about 714.3 and 344.8 (ions mg/sorbent grams) for Pb2+ and Sr2+ ions, respectively, which was up to four times higher than sorption capacity of the well-known analogues. Therefore, the presented study showed that potassium polytitanate can be considered as a promising product for industry-scaled wastewater purification in practice.
Idioma:inglês
Publicado em: 2020
Assuntos:
электронный ресурс
труды учёных ТПУ
sorption
heavy metals
radioactive metals
potassium titanate
ion exchange
сорбция
тяжелые металлы
радиоактивные металлы
титанаты
Acesso em linha:http://earchive.tpu.ru/handle/11683/64948
https://doi.org/10.3390/pr8020217
Formato: Recurso Electrónico Capítulo de Livro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663252

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