Enhanced removal of iodide from aqueous solution by ozonation and subsequent adsorption on Ag-Ag2O modified on Carbon Spheres

被引：57

作者：

Yu, Fang ^{[1
]}

Chen, Yuantao ^{[1
]}

Wang, Yunsheng ^{[1
]}

Liu, Chen ^{[1
]}

Ma, Wenqing ^{[1
]}

机构：

[1] Qinghai Normal Univ, Sch Chem & Chem Engn, Xining 810008, Qinghai, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 427卷

基金：

中国国家自然科学基金;

关键词：

Ag-Ag2O-CSs; Iodide; Iodine; Adsorption; Ozonation; FUKUSHIMA NUCLEAR ACCIDENT; RADIOACTIVE IODINE; ACTIVATED CARBON; WATER-TREATMENT; OXIDATION; IONS; OZONE; NANOPARTICLES; COMPOSITES; NANOFIBERS;

D O I：

10.1016/j.apsusc.2017.08.089

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, Ag-Ag2O coated on carbon spheres (Ag-Ag2O-CSs) as an effective adsorbent was successfully synthesized, the morphologies and structure of the as-fabricated composites were characterized through SEM, XRD and XPS. Ozonation and subsequent adsorption on Ag-Ag2O-CSs was used to removal of iodide from aqueous solution. Furthermore, the ozonation and adsorption process is slightly influenced in the presence of large concentrations of competitive anions, and the Ag-Ag2O-CSs displayed better adsorption ability at optimum conditions of pH 2.1. The equilibrium isotherms data for iodine adsorption onto Ag-Ag2O-CSs was best fitted with Freundlich isotherm and the adsorption capability was 374. 91 mg/g. The adsorption kinetics followed the pseudo-second-order kinetics. The thermodynamic have revealed that the adsorption process is endothermic and favorable. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：753 / 762

页数：10

共 59 条

[1] Potential of using green adsorbent of heavy metal removal from aqueous solutions: Adsorption kinetics, isotherm, thermodynamic, mechanism and economic analysis [J].

Ali, Rehab M. ;

Hamad, Hesham A. ;

Hussein, Mohamed M. ;

Malash, Gihan F. .

ECOLOGICAL ENGINEERING, 2016, 91 :317-332

[2] Removal of direct blue-106 dye from aqueous solution using new activated carbons developed from pomegranate peel: Adsorption equilibrium and kinetics [J].

Amin, Nevine Kamal .

JOURNAL OF HAZARDOUS MATERIALS, 2009, 165 (1-3) :52-62

[3]

[Anonymous], BACKGROUND DOCUMENT

[4] Adsorption of fluoride onto crystalline titanium dioxide: Effect of pH, ionic strength, and co-existing ions [J].

Babaeivelni, Kamel ;

Khodadoust, Amid P. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2013, 394 :419-427

[5] An overview of the modification methods of activated carbon for its water treatment applications [J].

Bhatnagar, Amit ;

Hogland, William ;

Marques, Marcia ;

Sillanpaa, Mika .

CHEMICAL ENGINEERING JOURNAL, 2013, 219 :499-511

[6] Removal of radioactive iodine from water using Ag2O grafted titanate nanolamina as efficient adsorbent [J].

Bo, Arixin ;

Sarina, Sarina ;

Zheng, Zhanfeng ;

Yang, Dongjiang ;

Liu, Hongwei ;

Zhu, Huaiyong .

JOURNAL OF HAZARDOUS MATERIALS, 2013, 246 :199-205

[7] THE EXCHANGE ADSORPTION OF IONS FROM AQUEOUS SOLUTIONS BY ORGANIC ZEOLITES .2. [J].

BOYD, GE ;

ADAMSON, AW ;

MYERS, LS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1947, 69 (11) :2836-2848

[8] In situ anion-exchange synthesis and photocatalytic activity of AgBr/Ag2O heterostructure [J].

Cao, Yuhui ;

Li, Qiuye ;

Xing, Yangyang ;

Zong, Lanlan ;

Yang, Jianjun .

APPLIED SURFACE SCIENCE, 2015, 341 :190-195

[9] Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal [J].

Chandra, Vimlesh ;

Park, Jaesung ;

Chun, Young ;

Lee, Jung Woo ;

Hwang, In-Chul ;

Kim, Kwang S. .

ACS NANO, 2010, 4 (07) :3979-3986

[10] Effect of anion type on the synthesis of mesoporous nanostructured MgO, and its excellent adsorption capacity for the removal of toxic heavy metal ions from water [J].

Chowdhury, Ipsita Hazra ;

Chowdhury, Arpita Hazra ;

Bose, Pallab ;

Mandal, Sanjoy ;

Naskar, Milan Kanti .

RSC ADVANCES, 2016, 6 (08) :6038-6047

← 1 2 3 4 5 6 →