Strontium removal from aquatic solution using electric arc furnace slag: kinetic, equilibrium and thermodynamic approach

被引:1
|
作者
Tadic, Milena [1 ]
Nikolic, Irena [1 ]
Cupara, Nevana [2 ]
Djurovic, Dijana [2 ]
Milasevic, Ivana [2 ]
机构
[1] Univ Montenegro, Fac Met & Technol, Dzordza Vasingtona bb, Podgorica 81000, Montenegro
[2] Inst Publ Hlth Montenegro, Dzona Dzeksona bb, Podgorica 81000, Montenegro
关键词
Electric arc furnace slag; Strontium; Adsorption; Kinetics; Equilibrium; Thermodynamics; AQUEOUS-SOLUTIONS; ADSORPTION BEHAVIOR; HEXAVALENT CHROMIUM; RADIOACTIVE-WASTE; SORPTIVE REMOVAL; EFFICIENT; IONS; CESIUM; ADSORBENTS; MANAGEMENT;
D O I
10.5004/dwt.2023.29559
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This study investigated strontium removal from aqueous solution using electric arc furnace (EAF) slag. Influence of sorbent dosage (0.5-3 g/L), pH (2.5-9.5), initial concentration of Sr2+ (50-300 ppm) and temperature (20 & DEG;C-45 & DEG;C) was evaluated. Optimal sorbent dosage and initial Sr2+ concentration were found to be 1.5 g/L and 150 ppm, respectively. Kinetics, equilibrium and thermodynamic mod-els were used to analyse the data. Kinetics of Sr2+ adsorption onto EAF slag was evaluated using pseudo-first-order and pseudo-second-order models and results have shown that experimental data had a better fit with the pseudo-second-order model. Langmuir and Freundlich isotherm models were used for evaluating the adsorption equilibrium and it has been shown that Langmuir model better described isotherm data. Maximal adsorption capacities of 111.11, 129.87 and 156.25 mg/g were obtained at 20 & DEG;C, 30 & DEG;C and 45 & DEG;C, respectively. Thermodynamic investigation indicated that adsorption of Sr2+ onto EAF slag is endothermic in nature, spontaneous and more favorable at higher temperatures.
引用
收藏
页码:139 / 148
页数:10
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