自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 9    September 2018

[PDF Download]    [Flash Online]

    

Reduction of Cr(VI) with a relative high concentration using different kinds of zero-valent iron powders: Focusing on effect of carbon content and structure on reducibility
LV Jin-fang(吕晋芳)1, 2, TONG Xiong(童雄)1, 2, ZHENG Yong-xing(郑永兴)2, XIE Xian(谢贤)1, 2, HUANG Ling-yun(黄凌云)1, 2

1. Faculty of Land Resource Engineering, Kunming University of Science and Technology,Kunming 650093, China;
2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
(Kunming University of Science and Technology), Kunming 650093, China

Abstract:Reduction of Cr(VI) using zero-valent iron (ZVI) could not only decrease the amounts of chemicals used for reduction, but also decrease the discharge of sludge. In order to find a desirable ZVI material, reduction of Cr(VI) with a relative high concentration using different kinds of ZVI powders (mainly carbon differences) including reduced Fe, grey cast iron, pig iron, nodular pig iron was carried out. Parameters such as ZVI dosage, type and size affecting on Cr(VI) reduction were firstly examined and grey cast iron was selected as a preferable reducing material, followed by pig iron. Additionally, it was found that the parameters had significant influences on experimental kinetics. Then, morphology and composition of the sample before and after reaction were characterized by SEM, EPMA and XPS analyses to disclose carbon effect on the reducibility. In order to further interpret reaction mechanism, different reaction models were constructed. It was revealed that not only the carbon content could affect the Cr(VI) reduction, but also the carbon structure had an important effect on its reduction.

 

Key words: relative high concentration Cr(VI); reduction; ZVI powder; carbon content; carbon structure

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号