Utilisation of barium-modified analcime in sulphate removal: Isotherms, kinetics and thermodynamics studies

被引：26

作者：

Runtti, Hanna ^{[1
]}

Tynjala, Pekka ^{[2
]}

Tuomikoski, Sari ^{[1
]}

Kangas, Teija ^{[1
]}

Hu, Tao ^{[1
]}

Ramo, Jaakko ^{[1
]}

Lassi, Ulla ^{[1
,2
]}

机构：

[1] Univ Oulu, Res Unit Sustainable Chem, POB 3000, FI-90014 Oulu, Finland

[2] Univ Jyvaskyla, Kokkola Univ Consortium Chydenius, Unit Appl Chem, Talonpojankatu 2B, FI-67100 Kokkola, Finland

来源：

JOURNAL OF WATER PROCESS ENGINEERING | 2017年 / 16卷

关键词：

Adsorption; Sulphate; Analcime; Zeolite; Chemical modification; SURFACTANT-MODIFIED ZEOLITES; CARBON-PASTE ELECTRODE; BLAST-FURNACE-SLAG; HEAVY-METAL IONS; AQUEOUS-SOLUTION; ACTIVATED CARBON; AMMONIUM REMOVAL; DYE REMOVAL; ADSORPTION; CLINOPTILOLITE;

D O I：

10.1016/j.jwpe.2016.11.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Analcime and commercial zeolite were employed as a precursor for preparing sorbent material for SO42- removal over barium modification. Three sorbents were prepared: barium-modified analcime (ANA-Na-Ba), barium-modified acid-washed analcime (ANA-Ac-Na-Ba) and barium-modified zeolite (ZSM5-Na-Ba). Of the prepared materials, ANA-Ac-Na-Ba was the most efficient sorbent material for SO42- removal, with a maximum sorption uptake of 13.7 mg g(-1) at room temperature. Batch sorption experiments were performed to evaluate the effect of initial pH, initial SO42- concentration, sorbent dosage, temperature and contact time of sorption. Several isotherms were applied to describe the experimental results and Bi-Langmuir was found to provide the best correlation for adsorption of SO42- on ANA-Ac-Na-Ba. Kinetic studies were applied for the most effective sorbent material, ANA-Ac-Na-Ba, and the results showed that the sorption process follows pseudo-second-order kinetics. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：319 / 328

页数：10

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