高炉渣对La3+的吸附性能研究

doi:10.11962/1006-4990.2018-0525

Abstract

Abstract:

Blast furnace slag is the main waste slag produced in blast furnace iron-making process.With the vigorous development of iron and steel industry in China,the discharge of blast furnace slag is increasing day by day.The accumulation of blast furnace slag not only increases the environmental burden,but also is a waste of resources.To improve the added value of blast furnace slag,the adsorption properties of blast furnace slag for La³⁺were investigated.The physicochemical properties of blast furnace slag were characterized by scanning electron microscope,X-ray fluorescence diffraction and nitrogen adsorption desorption apparatus.In order to further study the adsorption behavior and mechanism of blast furnace slag,the adsorption mechanism of La³⁺ on blast furnace slag was discussed in terms of kinetics and thermodynamics.The experimental results showed that: the blast furnace slag was well-defined with micro-crack structure,and were amorphous glass bodies.In the experiment of adsorption behavior,the experimental data met the quasi-first order kinetics and Langmuir isothermal adsorption model,respectively.

Key words: blast furnace slag, La³⁺, isothermal adsorption model, kinetic adsorption model

CLC Number:

TQ133.3

Ju Dianchun,Zhou Xiazhi,Zhang Lirui,Zhou Lei,Chen Chunyu,Yang Zhibin. Study on adsorption properties of blast furnace slag for La³⁺[J]. Inorganic Chemicals Industry, 2019, 51(8): 44-47.

Figures/Tables 11

References 15

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w （CaO）	w （SiO₂）	w （TiO₂）	w （Al₂O₃）	w （MgO）	w （SO₃）	w （Fe₂O₃）	w （K₂O）
39.31	26.31	10.80	10.13	8.7	1.13	1.13	0.79
w （Na₂O）	w （MnO）	w （SrO）	w （Cr₂O₃）	w （P₂O₅）	w （CeO₂）	w （ZrO₂）
0.70	0.53	0.13	0.12	0.08	0.08	0.04

吸附物质	Q_e,e / （mg·g^-1）	准一级动力学方程			准二级动力学方程
吸附物质	Q_e,e / （mg·g^-1）	Q_e,c / （mg·g^-1）	k₁/ min^-1	R²	Q_e,c / （mg·g^-1）	k₂/ min^-1	R²
La³⁺	13.56	13.495 9	6.16×10^-2	0.990 5	14.930 2	5.86×10^-3	0.970 1

T/K	Langmuir方程			Freundlich方程
T/K	R²	Q_m,L/ （mg·g^-1）	k_L （L·mg^-1）	R²	K_F/ （mg·g^-1）	1/n
293	0.983 4	190.104 8	1.61×10^-3	0.991 1	0.569 0	0.830 0
303	0.981 2	146.398 8	2.56×10^-3	0.991 6	0.845 4	0.769 1
313	0.981 8	179.715 3	1.65×10^-3	0.990 8	0.562 4	0.824 7

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on adsorption properties of blast furnace slag for La³⁺

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Study on adsorption properties of blast furnace slag for La3+