CIESC Journal ›› 2013, Vol. 64 ›› Issue (10): 3782-3789.DOI: 10.3969/j.issn.0438-1157.2013.10.040

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Effect of co-existing cations on phosphorous removal in ferrous iron oxidation of electroplating wastewater

LI Ting, DONG Wenyi, WANG Hongjie, LIN Jinnan, ZHANG Qian, OUYANG Feng   

  1. Environmental Science & Engineering Research Center, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Shenzhen 518055, Guangdong, China
  • Received:2013-02-27 Revised:2013-05-21 Online:2013-10-05 Published:2013-10-05
  • Supported by:

    supported by the Typical Industry Drainage Characteristics Pollutants Removal Complete Technology Research and Demonstration(2012ZX07206-002-02)and the Ministry of Housing and Urban-Rural Development Item:new process for phosphate and nitrogen removal on the basis of BAF process(2012-k7-18).

电镀废水中共存阳离子对Fe(Ⅱ)/O2去除无机磷的影响

李婷, 董文艺, 王宏杰, 林进南, 张岍, 欧阳峰   

  1. 哈尔滨工业大学深圳研究生院, 深圳市水资源利用与环境污染控制重点实验室, 广东 深圳 518055
  • 通讯作者: 董文艺
  • 作者简介:李婷(1986-),女,博士研究生。
  • 基金资助:

    典型行业排水特征污染物脱除成套技术研究与示范项目(2012ZX07206-002-02);住房和城乡建设部研究开发项目:基于曝气生物滤池的城市污水高效脱氮除磷新工艺开发(2012-k7-18)

Abstract: The interaction of ferrous ions and phosphorous was studied under aerobic conditions in order to assess effectiveness and feasibility of phosphorous removal.Using Fe(Ⅱ)/O2 and conventional technologies the removal effectiveness of phosphorous in a real electronic waste water and relative economic indicators was compared.For Fe(Ⅱ)/O2 system the effect of co-existing cations in simulating natural liquid on efficiency of phosphorous removal was examined using variables analysis.The results show that there was no effect of NH4+-N on phosphorous removal by Fe(Ⅱ)/O2 oxidation.Precipitation could occur between Zn(Ⅱ) and phosphorous in the system,which could promote removal of phosphorous and decrease of ferrous iron consumption.Mn(Ⅱ)as well as OH- could form complexes with Fe(Ⅲ)generated newly,the complexes are capable of hastening ferrous iron oxidation and also of improving the coagulation of Fe-P sedimentation.As the inventory of Mn(Ⅱ)increased from 0 to 1 mg·L-1,the removal rate of phosphorous raised 11% after 60 min reaction.Cu(Ⅱ)could remarkably increase the efficiency of phosphorous removal by its catalytic effect.As Cu(Ⅱ)concentration increased from 0 to 0.05 mg·L-1,the reaction time required 45% phosphotous removal could be reduced from 60 min to 5 min.For a real electronic wastewater the phosphorous removal was better for Fe(Ⅱ)/O2 system in the presence of the above mentioned cations than for lime alone,while sludge production and economic cost was lower for the former than for the latter.

Key words: co-existing cations, ferrous iron, phosphate removal, catalyzed oxidation, coagulating sedimentation

摘要: 通过序批试验,考察了有氧条件下,共存阳离子对亚铁除磷效率的影响并以实际电子废水为考察对象,对比研究Fe(Ⅱ)/O2与传统石灰工艺的除磷效果及相关技术经济指标。结果表明:NH4+-N对同步氧化Fe(Ⅱ)除磷效率几乎没有影响;Zn(Ⅱ)可通过与磷酸根反应产生沉淀提高磷的去除率。Mn(Ⅱ)可与新生三价铁形成稳定络合物,促进亚铁氧化并改善铁磷沉淀物混凝沉淀性能,当Mn(Ⅱ)投加量为1.0 mg·L-1时,反应60 min后,磷的去除率提高11%。Cu(Ⅱ)能高效催化亚铁氧化,从而使亚铁除磷效率显著提高,在Cu(Ⅱ)浓度为0.05 mg·L-1时,除去45%水中磷所需时间由空白的60 min缩短为5 min,Cu(Ⅱ)是所选共存阳离子中最为高效的亚铁除磷催化剂。以实际电镀废水为研究对象,在共存离子的促进作用下,Fe(Ⅱ)/O2对废水中磷的去除效果优于传统石灰法,且药剂成本及产泥量均低于直接投加石灰的除磷工艺。

关键词: 阳离子, 亚铁, 磷去除, 催化氧化, 混凝沉淀

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