全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
环境化学  2015 

纳米零价铁去除垃圾渗滤液中铬(Ⅵ)的性能及机理研究

Keywords: 纳米零价铁,腐殖酸,柠檬酸,铬(Ⅵ),螯合物

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用柠檬酸处理后的纳米零价铁(NZVI)对铬(Cr(Ⅵ))的去除进行了研究.NZVI对Cr(Ⅵ)的去除率受Cr(Ⅵ)初始浓度、pH值、反应温度和NZVI的浓度等因素影响,在Cr(Ⅵ)初始浓度为20mg·l-1、pH=5.0、NZVI投加量为1.0g.l-1和20℃条件下,Cr(Ⅵ)去处率达到了100%.腐殖酸(HA)与Cr(Ⅵ)可以形成稳定的HA-Cr螯合物,这种螯合物减少了溶液中有效的Cr(Ⅵ)浓度;同时,HA与NZVI的反应减少了NZVI的有效活性位点,HA的存在对NZVI去除Cr(Ⅵ)有竞争抑制的作用.

References

[1]  Ponder Sherman M,Darab John G, Mallouk Thomas E, Remediation of Cr(Ⅵ) and Pb(Ⅱ)Aqueous Solutions Using Supported, Nanoscale Zero-Valent Iron [J]. Environ. Sci. Technol.,2000, 34:2564—2569
[2]  Lewis Roger D, Condoor Sridhar, Batek Joe et al., Removal of Lead Contaminated Dusts from Hard Surfaces [J]. Environ. Sci. Technol., 2006, 40:590—594
[3]  张道斌,吕玉娟,张晖,化学沉淀法去除垃圾渗滤液中氨氮的试验研究[J].环境化学,2007,26(1):62—65
[4]  Chai Xiaoli, Takayuki Shimaoka, Cao Xianyan et al., Characteristics and Mobility of Heavy Metals in an MSW Land fill:Implications in Risk Assessment and Reclamation [J]. J.Hazard. Mater., 2007, 144: 485—491
[5]  Genc-Fuhrman Hulya, Wu Peng, Zhou Yanshan et al., Removal of As, Cd, Cr, Cu, Ni and Zn from Polluted Water Using an Iron Based Sorbent[J]. Desalination, 2008, 226:357—370
[6]  Stevenson F J, Humus Chemistry: Genesis, Composition, Reactions[M]. 2nd ed.,New York: J. Wiley, 1994
[7]  Davis Allen P, Bhatnagar Vivek, Adsorption of Cadmium and Humic Acid onto Hematite [J]. Chemosphere,1995, 30:243—256
[8]  Kanel Sushil Raj, Greneche Jean-Mark, Choi Heechul, Arsenic(V) Removal from Groundwater Using Nano Scale Zero-Valent Iron as a Colloidal Reactive Barrier Material [J]. Environ. Sci. Technol., 2006, 40:2045—2050
[9]  刘卫华,季民,张昕等,催化臭氧氧化去除垃圾渗滤液中难降解有机物的研究[J].环境化学,2007,26(1):58—61
[10]  Rosa G de la, Peralta-Videa J R, Garden-Torresdey J L, Utilization of ICP/OES for the Determination of Trace Metal Binding to Different Humic Fractions [J]. J.Hazard.Mater., 2003, [WTHZ]B97[WTBZ], 207—218
[11]  Zhang Weixian, Nanoscale Iron Particles for Environmental Remediation: an Overview [J]. Journal of Nanoparticle Research, 2003, 5:323—332
[12]  Keenan Christina R, Sedlak David L, Factors Affecting the Yield of Oxidants from the Reaction of Nanoparticulate Zero-Valent Iron and Oxygen[J].Environ. Sci. Technol., 2008, 42:1262—1267
[13]  Gu Baohua, Schmitt Juergem, Chen Zhihong et al., Adsorption and Desorption of Natural Organic Matter on Iron Oxide: Mechanisms and Models [J]. Environ. Sci. Technol., 1994, 28:38—46

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133