...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment
【24h】

Addressing harmful algal blooms (HABs) impacts with ferrate(VI): Simultaneous removal of algal cells and toxins for drinking water treatment

机译：用高铁酸盐（VI）处理有害藻华（HABs）的影响：同时去除藻类细胞和毒素以进行饮用水处理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Although ferrate(VI) has long been recognized as a multi-purpose treatment agent, previous investigations regarding ferrate(VI) for addressing harmful algal blooms (HABs) impacts in drinking water treatment only focused on a single HAB pollutant (e.g. algal cells or algal toxins). Moreover, the performance of ferrate(Vl)-driven coagulation was poorly investigated in comparison with ferrate(VI) oxidation, though it has been widely acknowledged as a major ferrate(VI) treatment mechanism. We herein reported ferrate(VI) as an emerging agent for simultaneous and effective removal of algal cells and toxins in a simulated HAB-impacted water. Ferrate(VI)-driven oxidation enabled algal cell inactivation and toxin decomposition. Subsequently, Fe(III) from ferrate(VI) reduction initiated an in-situ coagulation for cell aggregation. Cell viability (initial 4.26 x 10(4) cells/mL at pH 5.5 and 5.16 x 10(4) cells/mL at pH 7.5) decreased to 0.0% at >= 7 mg/L Fe(VI) at pH 5.5 and 7.5, respectively. Cell density and turbidity were dramatically decreased at pH 5.5 once ferrate(VI) doses were beyond their respective threshold levels, which are defined as minimum effective iron doses (MEIDs). However, the particulate removal at pH 7.5 was poor, likely because the coagulation was principally driven by charge neutralization and a higher pH could not sufficiently lower the particle surface charge. Meanwhile, algal toxins (i.e., microcystins) of 3.98 mu g/L could be substantially decomposed at either pH. And the greater degradation achieved at pH 5.5 was due to the higher reactivity of ferrate(VI) at the lower pH. This study represents the first step toward the ferrate(VI) application as a promising approach for addressing multiple HABs impacts for water treatment. (C) 2017 Elsevier Ltd. All rights reserved.
机译：尽管高铁酸盐（VI）长期以来一直被认为是一种多功能处理剂，但以前针对高铁酸盐（VI）解决饮用水处理中有害藻华（HABs）影响的研究仅集中于单一HAB污染物（例如藻类细胞或藻类）毒素）。此外，与高铁酸盐（VI）氧化相比，高铁酸盐（VI）驱动的混凝性能研究得很差，尽管它已被公认为主要的高铁酸盐（VI）处理机理。我们在本文中报道了高铁酸盐（VI）作为新兴物质，可同时有效去除模拟的HAB影响的水中的藻类细胞和毒素。高铁酸盐（VI）驱动的氧化使藻类细胞失活和毒素分解。随后，高铁酸盐（VI）还原过程中的铁（III）启动了原位凝集以促进细胞聚集。细胞活力（pH 5.5时初始为4.26 x 10（4）个细胞/ mL，pH 7.5中为5.16 x 10（4）个细胞/ mL）> = 7 mg / L Fe（VI）在pH 5.5和7.5下降低至0.0％ ， 分别。一旦高铁酸盐（VI）剂量超过其各自的阈值水平（定义为最小有效铁剂量（MEID）），细胞密度和浊度在pH 5.5时会急剧下降。但是，在pH 7.5时颗粒去除效果不佳，可能是因为凝结作用主要是由电荷中和驱动的，而较高的pH值不足以降低颗粒表面的电荷。同时，在任何一个pH下，3.98μg/ L的藻毒素（即微囊藻毒素）都可以被分解。在pH 5.5下实现的更大降解是由于较低pH下高铁酸盐（VI）的反应性更高。这项研究代表了高铁酸盐（VI）应用的第一步，它是解决水处理中多种HAB影响的有前途的方法。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Chemosphere》 |2017年第11期|757-761|共5页
  • 作者

    Deng Yang; Wu Meiyin; Zhang Huiqin; Zheng Lei; Acosta Yaritza; Hsu Tsung-Ta D.;

  • 作者单位

    Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA;

    Montclair State Univ, Passa River Inst, Montclair, NJ 07043 USA|Montclair State Univ, Dept Biol, Montclair, NJ 07043 USA;

    Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA|Hubei Univ Technol, Sch Civil Engn Architecture & Environm, Wuhan 430068, Hubei, Peoples R China;

    Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA;

    Montclair State Univ, Passa River Inst, Montclair, NJ 07043 USA|Montclair State Univ, Dept Biol, Montclair, NJ 07043 USA;

    Montclair State Univ, Passa River Inst, Montclair, NJ 07043 USA|Montclair State Univ, Dept Biol, Montclair, NJ 07043 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ferrate(VI); Algal cells; Algal toxins; Chemical oxidation; Coagulation; Drinking water treatment;

    机译：高铁酸盐（VI）;藻类细胞;藻类毒素;化学氧化;混凝;饮用水处理;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号