文献知网节
  • 记笔记

BORON REMOVAL FROM INDUSTRIAL WASTE WATERS BY USING ALUMINUM NITRATE COAGULANT WITH CHEMICAL COAGULATION METHOD

Zeynep Karcioglu KarakasM.Tolga YilmazRecep Boncukuoglu

Ataturk University Engineering Faculty Environmental Engineering Department 25240,Yakutiye, Erzurum

摘要:In this study, removal of boron from the industrial waste waters by chemical coagulation methods and effecting parameters of the process has been investigated by using aluminum nitrate(Al(NO3)3) as coagulant. The effects of initial pH of solution, initial boron concentration, stirring speed, dosage of the coagulant substance were investigated for boron removal. It is observed that stirring speed isn’t affected in the boron removal efficiency. The rapid stirring speed of 120 rpm and the low stirring speed of 30 rpm were used in experiments as stirring speed. It is observed that pH is the most important parameters for boron removal by chemical coagulation process. It is observed that the boron removal efficiency is the highest when the different coagulant dosage was applied and the last pH’ s of solution were values between 7-9. The reason of this, the pH of Al(OH)3 formation is high in values between 6.0-9.0. Increasing in the initial boron concentration increased the boron removal efficiency. A large amount of aluminum in the media is in the form of Al(OH)3 at this pH range and the type of this form does tend to make flocks. According to the accomplished results, it has been believed that increasing the treatment efficiency was depended on the sufficient coagulant and the pH at which dissolving of aluminum is the lowest. The solid Al(OH)3(s) dissolves at lower and upper values of this pH region and stays as dissolvable aluminum forms. Instead of aluminum ions were presented in the medium, they did not intent to make flocks at out of these pH regions. When distribution of different borate ions which were generated depending on the pH in aqueous boron solutions borate is examined, boron ions were found as polyborates at lower pH and monoborates at higher pH. When the pH of the medium is higher than 8 then generally the boron ions were found in the form of B(OH)4-.When experimental results were examined the flocks of Al(OH)3(s) which were formed at the above mentioned pH region could remove the boron in the medium, efficiency of the removal stays at low rates due to deficient flock generation at lower and upper variations of pH. It has been observed in all completed experiments that the maximum removal rate was found 35%.
会议名称:

Sixteenth International Water Technology Conference

会议时间:

2012-05-07

会议地点:

Istanbul,Turkey

  • 专辑:

    工程科技Ⅰ辑

  • 专题:

    环境科学与资源利用

  • 分类号:

    X703

  • 手机阅读
    即刻使用手机阅读
    第一步

    扫描二维码下载

    "移动知网-全球学术快报"客户端

    第二步

    打开“全球学术快报”

    点击首页左上角的扫描图标

    第三步

    扫描二维码

    手机同步阅读本篇文献

  • CAJ下载
  • PDF下载

下载手机APP用APP扫此码同步阅读该篇文章

下载:9 页码:1194-1204 页数:11 大小:247k

引文网络
  • 参考文献
  • 引证文献
  • 共引文献
  • 同被引文献
  • 二级参考文献
  • 二级引证文献
  • 批量下载
相关推荐
  • 相似文献
  • 读者推荐
  • 相关基金文献
  • 相关法规
  • 关联作者
  • 相关视频