Limestone: A Natural, Low-Priced Adsorbent for U(VI)

被引：0

作者：

Diwan, V. ^{[1
]}

Sar, S. K. ^{[2
]}

机构：

[1] Shri Shankaracharya Profess Univ, Dept Chem, Bhilai 491001, India

[2] Bhilai Inst Technol, Dept Appl Chem, Durg 491001, India

来源：

RADIOCHEMISTRY | 2023年 / 65卷 / 03期

关键词：

limestone; uranium(VI); adsorbent; batch test; Chhattisgarh; removal efficiency; AQUEOUS-SOLUTION; URANIUM; REMOVAL;

D O I：

10.1134/S1066362223030128

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Limestone obtained from Kirari, Akaltara, Chhattisgarh was applied to adsorb uranium(VI) from an aqueous solution of uranyl nitrate. Batch tests were performed with varying pH (2-9), U(VI) concentration (10-100 mg/L), stirring time (10-80 min), and limestone dosage (0.1-0.6 g/50 mL). At ambient temperature, 60.5% removal efficiency was recorded at pH 6, U(VI) concentration of 25 mg/L, stirring time of 40 min, and limestone dosage of 0.4 g/50 mL. The adsorption kinetics, thermodynamics, and isotherm were studied. The U(VI) adsorption onto limestone was endothermic and obeyed the Langmuir model with pseudo-first-order kinetics. The U(VI) adsorption onto limestone is due to electrostatic affinity.

引用

页码：354 / 362

页数：9