钢渣对Ni2+与Cu2+的竞争吸附研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (5): 1750-1757.

钢渣对Ni²⁺与Cu²⁺的竞争吸附研究

冯珊珊¹, 汪凯举², 章蓝月¹, 顾子萱¹, 李灿华^1,3

1.安徽工业大学冶金工程学院,马鞍山 243000;
2.宣城市宣城经开区科技创业服务中心,宣城 242000;
3.宣城市安工大工业技术研究院有限公司,宣城 242000

收稿日期:2021-12-28 修回日期:2022-02-17 出版日期:2022-05-15 发布日期:2022-06-01
通讯作者: 李灿华,博士,教授。E-mail:licanhua1979@163. com
作者简介:冯珊珊(2000—),女。主要从事冶金固废的研究。E-mail:1919290381@qq.com

Study on Competitive Adsorption of Ni²⁺ and Cu²⁺ by Steel Slag

FENG Shanshan¹, WANG Kaiju², ZHANG Lanyue¹, GU Zixuan¹, LI Canhua^1,3

1. College of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243000, China;
2. Science and Technology Entrepreneurship Service Center, Xuancheng Economic Development Zone, Xuancheng 242000, China;
3. Xuancheng Industrial Technology Research Institute of Anhui University of Technology Co., Ltd., Xuancheng 242000, China

Received:2021-12-28 Revised:2022-02-17 Online:2022-05-15 Published:2022-06-01

摘要/Abstract

摘要： 将转炉钢渣磨碎筛分,从钢渣投加量、吸附时间、酸性条件等方面探究其对水溶液中Ni²⁺的吸附性能及吸附机理,并讨论Cu²⁺对钢渣吸附Ni²⁺的影响。研究结果表明,100 mL浓度为50 mg·L^-1的Ni²⁺溶液,用200目(0.074 mm)0.15 g的钢渣处理30 min,Ni²⁺的吸附率为99.88%。钢渣吸附Ni²⁺的过程符合准二级动力学模型和Freundlich等温模型。钢渣吸附Cu²⁺与吸附Ni²⁺属于竞争吸附,且钢渣对Cu²⁺的吸附能力优于对Ni²⁺的吸附能力。钢渣吸附Ni²⁺的过程以化学吸附为主,伴随着物理吸附,且随着钢渣表层吸附位点的减少,钢渣对Ni²⁺的物理吸附作用会逐渐减弱。该研究对处理工业含Ni²⁺与Cu²⁺的废水具有一定的指导意义。

关键词: 钢渣, 吸附, Ni²⁺, Cu²⁺, 竞争吸附, 废水处理

Abstract: The adsorption performance and mechanism of converter steel slag for Ni²⁺ in aqueous solution were discussed from the aspects of steel slag dosage, adsorption time and acid conditions, and the effect of Cu²⁺ on the adsorption of Ni²⁺by steel slag was also discussed. The results show that when 100 mL Ni²⁺ solution with a concentration of 50 mg·L^-1 is treated with 200 mesh (0.074 mm) 0.15 g steel slag at 25 ℃ for 30 min, the adsorption capacity of Ni²⁺ is 33.290 mg·g^-1 (adsorption rate is 99.88%). The adsorption process of Ni²⁺ by steel slag conforms to the pseudo-second-order kinetic equation and Freundlich isothermal model, and the correlation coefficient R² is 0.984 and 0.994, respectively. The adsorption of Ni²⁺ and Cu²⁺ by steel slag belongs to competitive adsorption, and the adsorption capacity of Cu²⁺ by steel slag is better than that of Ni²⁺. When the pH value is very low, the adsorption effect of steel slag on Ni²⁺ and Cu²⁺ is poor. The adsorption process of steel slag on Ni²⁺ is mainly chemical adsorption, accompanied by physical adsorption, and with the decrease of adsorption sites on the steel slag surface, the physical adsorption of steel slag on Ni²⁺ will gradually weaken. The research may provide some guidance to the treatment of industrial wastewater containing Ni²⁺ and Cu²⁺.

Key words: steel slag, adsorption, Ni²⁺, Cu²⁺, competitive adsorption, effluent treatment

中图分类号:

X705

冯珊珊, 汪凯举, 章蓝月, 顾子萱, 李灿华. 钢渣对Ni²⁺与Cu²⁺的竞争吸附研究[J]. 硅酸盐通报, 2022, 41(5): 1750-1757.

FENG Shanshan, WANG Kaiju, ZHANG Lanyue, GU Zixuan, LI Canhua. Study on Competitive Adsorption of Ni²⁺ and Cu²⁺ by Steel Slag[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1750-1757.

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钢渣对Ni²⁺与Cu²⁺的竞争吸附研究

Study on Competitive Adsorption of Ni²⁺ and Cu²⁺ by Steel Slag

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