磁性吸附材料CuFe2O4吸附砷的性能

被引：27

作者：

武荣成

曲久辉

吴成强

机构：

[1] 中国科学院生态环境研究中心环境水质学国家重点实验室,中国科学院生态环境研究中心环境水质学国家重点实验室,中国科学院生态环境研究中心环境水质学国家重点实验室北京,北京,北京

来源：

环境科学 | 2003年 / 05期

关键词：

砷; CuFe2O4; 磁性吸附剂; 磁分离;

D O I：

10.13227/j.hjkx.2003.05.011

中图分类号：

TU991.2 [净水工程（给水处理）];

学科分类号：

0815 ;

摘要：

根据Cu(Ⅱ )和Fe(Ⅲ )都对砷有较强的亲和性 ,制备了同时含有Cu(Ⅱ )和Fe(Ⅲ )的、可用磁分离方法进行分离回收的磁性吸附材料CuFe2 O4 ,并对其进行了表征及吸附砷的性能研究 .结果表明 ,该吸附剂对砷的吸附能力与溶液 pH有关 ,在弱酸性及中性条件下 ,吸附砷的能力最强 ,而对As(V)的吸附能力比对As(Ⅲ )更强些 ,在平衡浓度为 1 0 μg/L时 ,其吸附容量可达 1 0mg/ g左右 ,可以很容易地将水中浓度为 1～ 2 0mg/L的As(V)降到1 0 μg/L以下 .实验考察了几种无机阴离子对吸附砷的影响 ,表明较高浓度 (砷浓度的 2 0倍 )的硫酸盐对As(Ⅲ )和As(Ⅴ )的吸附均有一定影响 ,盐酸盐及磷酸盐则影响不明显 ;负载的As(V)可较容易地用 0 1mol/LNaOH洗脱下来 ,使吸附剂再生 ,而As(Ⅲ )则难以洗脱 ,这与 2种价态砷的吸附机理不同有关 .

引用

页码：60 / 64

页数：5

共 11 条

[1]

As(V)removalfromaqueoussolutionsbyflyash. DiamadopoulosE,IoannidisS,SakellaropoulosGP. Water Resources Research . 1993

[2]

Competitive adsorption of phosphate and arsenate on goethite. Zhao H S,Robert S. Environmental Science and Technology . 2001

[3]

Enhancedcoagulationforarsenicremoval. ChengRC,WangCC,BeuhlerMD. Journal of the American Water Works Association . 1994

[4]

Effectiveness of phosphate and hydroxide for desorption of arsenic and selenium species from Iron oxides. Jackson B P,Miller W P. Soil Science Society of America Journal . 2000

[5]

Arsenite and Arsenate adsorption on ferrihydrite: surface charge reduction and net OH-release stoichiometry. Jain A,Raven K P,Loeppert R H. Environmental Science and Technology . 1999

[6]

An investigation of arsenate and arsenite bonding structures on goethite by FTIR. Sun X,Doner H E. Soil Science . 1996

[7]

The sorption of arsenic onto activated carbon impregnated with metallic silver and copper. Rajakoviv L V. Separation Science and Technology . 1992

[8]

Arsenic adsorption by Fe(Ⅲ)-loaded open-celled cellulose sponge.Thermodynamic and selectivity aspects. Jose A M,Anna G,Manuel V. Environmental Science and Technology . 2002

[9]

Removing arsenic from groundwater for the developing world———a review. Jiang J Q. Water Science and Technology . 2001

[10]

Arsenate and arsenite removal by zerovalent iron: effects of phosphate, silicate, carbonate, borate, sulfate, chromate, molybdate, and nitrate, relative to chloride. Su C M,Puls R W. Environmental Science and Technology . 2001

← 1 2 →