Renewable P-type zeolite for superior absorption of heavy metals: Isotherms, kinetics, and mechanism | Научно-инновационный портал СФУ

Renewable P-type zeolite for superior absorption of heavy metals: Isotherms, kinetics, and mechanism

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.scitotenv.2020.138535

Ключевые слова: Drinkable level, High efficiency, Regeneration, Uptake capacity

Аннотация: Zeolite is a characteristic material for removing heavy metals exhibiting by low tolerance quantities. It is particularly desirable although challenging to cultivate an unmodified and reusable zeolite for eradicating heavy metals with great capacity. Herein, we sought out and firstly synthesized the uniform octahedral zeolite Na6Al6Si10O32·12H2O for heavy metal ions trap, proven extraordinarily effective decontamination of M2+ (Pb2+, Cd2+, Cu2+, and Zn2+). The maximum capacities of Pb2+, Cd2+, Cu2+, and Zn2+ were 649, 210, 90 and 88 mg/g, and the distribution coefficients (Kd) was ~108 mL/g for Pb2+ which emphasized the superior effectiveness of Na6Al6Si10O32·12H2O contrasted with other zeolites. Rapid adsorption was observed that Pb2+ concentration (7.5 ppm) was reduced to 0.6 ppb in 2 min. The removal mechanism was ascribed to the ion exchange and hydroxyl groups thereby affording high adsorption capacity. We also investigated the heavy metal removal of zeolite 13X and 4A for comparison and concluded the determining factor affecting absorption capacity. The removal rate of Pb remained at 97% even after five regeneration recycles. The zeolite was therefore promising for practical water purification and industrialization. © 2020

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Издание

Журнал: Science of the Total Environment

Выпуск журнала: Vol. 726

Номера страниц: 138535

ISSN журнала: 00489697

Издатель: Elsevier B.V.

Авторы

  • Chen M. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China)
  • Nong S. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China)
  • Zhao Y. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China)
  • Riaz M.S. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China)
  • Xiao Y. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China)
  • Molokeev M.S. (Siberian Federal University,Krasnoyarsk,660041,Russian Federation)
  • Huang F. (Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China,; CAS Key Laboratory of Materials for Energy Conversion and State Key Laboratory of High-Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,200050,China)

Вхождение в базы данных

  • Scopus (цитирований 1)

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