首页> 美国卫生研究院文献>Scientific Reports >Effects of Lead and Mercury on Sulfate-Reducing Bacterial Activity in a Biological Process for Flue Gas Desulfurization Wastewater Treatment
【2h】

Effects of Lead and Mercury on Sulfate-Reducing Bacterial Activity in a Biological Process for Flue Gas Desulfurization Wastewater Treatment

机译:铅和汞对烟道气脱硫废水生物处理过程中硫酸盐还原细菌活性的影响

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Biological sulfate-reducing bacteria (SRB) may be effective in removing toxic lead and mercury ions (Pb(II) and Hg(II)) from wet flue gas desulfurization (FGD) wastewater through anaerobic sulfite reduction. To confirm this hypothesis, a sulfite-reducing up-flow anaerobic sludge blanket reactor was set up to treat FGD wastewater at metal loading rates of 9.2 g/m3-d Pb(II) and 2.6 g/m3-d Hg(II) for 50 days. The reactor removed 72.5 ± 7% of sulfite and greater than 99.5% of both Hg(II) and Pb(II). Most of the removed lead and mercury were deposited in the sludge as HgS and PbS. The contribution of cell adsorption and organic binding to Pb(II) and Hg(II) removal was 20.0 ± 0.1% and 1.8 ± 1.0%, respectively. The different bioavailable concentration levels of lead and mercury resulted in different levels of lethal toxicity. Cell viability analysis revealed that Hg(II) was less toxic than Pb(II) to the sludge microorganisms. In the batch tests, increasing the Hg(II) feeding concentration increased sulfite reduction rates. In conclusion, a sulfite-reducing reactor can efficiently remove sulfite, Pb(II) and Hg(II) from FGD wastewater.
机译:生物还原硫酸盐细菌(SRB)可以有效地通过厌氧亚硫酸盐还原从湿烟气脱硫(FGD)废水中去除有毒的铅和汞离子(Pb(II)和Hg(II))。为了证实这一假设,建立了亚硫酸盐还原流厌氧污泥毯式反应器,以处理金属负荷率为9.2 g / m 3 -d Pb(II)和2.6 g / m2的烟气脱硫废水。 m 3 -d Hg(II)50天。该反应器除去了72.5%±7%的亚硫酸盐和大于99.5%的Hg(II)和Pb(II)。除去的大部分铅和汞以HgS和PbS的形式沉积在污泥中。细胞吸附和有机结合对Pb(II)和Hg(II)去除的贡献分别为20.0±0.1%和1.8±1.0%。铅和汞的不同生物利用浓度水平导致不同程度的致死毒性。细胞活力分析表明,Hg(II)对污泥微生物的毒性小于Pb(II)。在分批测试中,增加Hg(II)进料浓度可提高亚硫酸盐还原速率。总之,亚硫酸还原反应器可以有效地去除烟气脱硫废水中的亚硫酸盐,Pb(II)和Hg(II)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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