Enhanced fluoride removal by loading Al/Zr onto carboxymethyl starch sodium: synergistic interactions between Al and Zr

被引：21

作者：

Cai, Huimei ^{[1
]}

Chen, Guijie ^{[1
]}

Peng, Chuanyi ^{[1
]}

Xu, Lingyun ^{[1
]}

Zhang, Zhengzhu ^{[1
]}

Ke, Fei ^{[1
,2
]}

Wan, Xiaochun ^{[1
]}

机构：

[1] Anhui Agr Univ, State Key Lab Tea Plant Biol & Utilizat, Sch Tea & Food Sci & Technol, Hefei 230036, Anhui, Peoples R China

[2] Anhui Agr Univ, Sch Sci, Hefei 230036, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 123期

关键词：

HYDROUS ZIRCONIUM-OXIDE; DRINKING-WATER; AQUEOUS-SOLUTION; ADSORPTIVE REMOVAL; LOW-COST; ADSORBENT; DEFLUORIDATION; WASTE; SORPTION; IONS;

D O I：

10.1039/c5ra18167d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, a novel type of adsorbent was prepared by loading Al/Zr onto carboxymethyl starch sodium to generate CMS-Al, CMS-Zr or CMS-Al-Zr. The adsorbents were tested for removal of fluoride by batch adsorption experiments under various conditions. It was found that CMS-Al-Zr performed well over a considerably wide pH range of 4-10. The adsorption process could be described by a Langmuir isotherm model and Lagergren pseudo-second-order kinetic model. The maximum adsorption capacity for CMS-Al-Zr (60.61 mg g(-1)) was higher than CMS-Al (51.44 mg g(-1)) and CMS-Zr (40.23 mg g(-1)) due to synergistic interactions between Al and Zr. SEM, EDS, XRD, FTIR and XPS studies revealed the Al/Zr loading process and mechanism of fluoride adsorption. The results showed that the metal complex was coordinated to the -COO group of CMS through ion exchange of sodium during the loading process.

引用

页码：101819 / 101825

页数：7

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