当前位置: X-MOL 学术Adsorption › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Low-cost novel silica@polyacrylamide composites: fabrication, characterization, and adsorption behavior for cadmium ion in aqueous solution
Adsorption ( IF 3.3 ) Pub Date : 2020-03-19 , DOI: 10.1007/s10450-020-00225-4
Xiayi (Eric) Hu , Xuanping Luo , Gongkui Xiao , Qian Yu , Yuanyuan Cui , Gang Zhang , Rui Zhang , Yang Liu , Yefeng Zhou , Zhaogang Zeng

Pollution during rapid industrialization process is a serious environmental problem that seriously affects people's lives and livelihoods. Among them, the pollution of excessive heavy metals in wastewater has attracted wide attention. The current study proposes a novel effective and low-cost silica@polyacrylamide composites (SP-C) to capture cadmium ion (Cd2+) from wastewater contaminated by heavy metal. The chemical and physical properties of the surface and interior of silica@polyacrylamide composites were studied by different characterization methods. The adsorption capacity and kinetics of cadmium ions in aqueous solutions using silica@polyacrylamide composites were also studied, and some discussions about the mechanism of adsorption process were made. Silica@polyacrylamide composites showed enhanced cadmium ions adsorption with the maximum adsorption capacity of 211.86 mg/g (pH 6.5, T = 318.15 K), which was fitted by Langmuir model. The adsorption experimental kinetic data of silica@polyacrylamide composites could be excellently verified by pseudo-second-order model. Moreover, a comparison of the cost between the proposed silica@polyacrylamide composites and other reported adsorbents is provided. And the results indicate that the silica@polyacrylamide composites adsorption cost is 0.16 $/g cadmium ion, which means a promising cost-effective adsorbent for cadmium ion removing.



中文翻译:

低成本新型二氧化硅@聚丙烯酰胺复合材料:水溶液中镉离子的制备,表征和吸附行为

快速工业化过程中的污染是一个严重的环境问题,严重影响人们的生活和生计。其中,废水中过量重金属的污染引起了广泛关注。当前的研究提出了一种新型有效且低成本的二氧化硅@聚丙烯酰胺复合材料(SP-C),用于捕获镉离子(Cd 2+)中被重金属污染的废水。通过不同的表征方法研究了二氧化硅@聚丙烯酰胺复合材料的表面和内部的化学和物理性质。还研究了二氧化硅@聚丙烯酰胺复合材料在水溶液中对镉离子的吸附能力和动力学,并对吸附过程的机理进行了一些讨论。硅胶@聚丙烯酰胺复合材料显示出增强的镉离子吸附能力,最大吸附容量为211.86 mg / g(pH 6.5,T = 318.15 K),这符合Langmuir模型。拟二阶模型可以很好地验证二氧化硅@聚丙烯酰胺复合材料的吸附实验动力学数据。此外,提供了所提出的二氧化硅@聚丙烯酰胺复合材料与其他报道的吸附剂之间的成本比较。

更新日期:2020-03-19
down
wechat
bug