The effect of pyrite on Escherichia coli in water: proof-of-concept for the elimination of waterborne bacteria by reactive minerals.
The effect of pyrite on Escherichia coli in water: proof-of-concept for the elimination of waterborne bacteria by reactive minerals.
复制标题
DOI：
10.2166/wh.2014.013
复制
发表时间：
2015-03
影响因子：
2.3
通讯作者：
Wali Karzai A
中科院分区：
文献类型：
--
作者：
Friedlander LR;Puri N;Schoonen MA;Wali Karzai A
我们介绍了通过活性矿物消除水中细菌的概念验证结果。我们在室温和环境光下将悬浮在水中的E.ColiMG1655暴露在活性矿物黄铁矿(FeS2)中。这种浆液在不到4小时内就能清除99.9%的细菌。我们还将大肠杆菌暴露在黄铁矿渗滤液(24小时后泥浆的上清液)中，在相同的时间尺度上消除了99.99%的细菌。与太阳能水消毒(SODIS)不同，我们的结果不依赖于紫外线(UV)的存在。我们通过测试建议的SODIS添加剂和已知的光催化剂锐钛矿(二氧化钛)的抗菌性能来证实这一点，并发现，与黄铁矿相反，在我们的实验条件下，它不能消除大肠杆菌。以前对天然抗生素矿物的研究主要集中在抗生素粘土的医疗应用上，因此没有在类似于水净化中的实验条件下进行过。在我们对相关文献的研究中，我们没有发现以前报道的在水消毒中使用活性矿物质的证据。这一概念验证实验的结果可能会对未来家庭净水研究的方向产生重要影响。
We present proof-of-concept results for the elimination of waterborne bacteria by reactive minerals. We exposed E.coli MG1655 suspended in water to the reactive mineral pyrite (FeS2) at room temperature and ambient light. This slurry eliminates 99.9% of bacteria in fewer than 4 hours. We also exposed E. coli to pyrite leachate (supernatant liquid from slurry after 24-hours), which eliminates 99.99% of bacteria over the same time-scale. Unlike SOlar water DISinfection (SODIS) our results do not depend on the presence of ultraviolet (UV) light. We confirmed this by testing proposed SODIS additive and known photo-catalyst anatase (TiO2) for antibacterial properties and found that, in contrast to pyrite, it does not eliminate E. coli under our experimental conditions. Previous investigations of naturally antibiotic minerals have focused on the medical applications of antibiotic clays, and thus have not been conducted under experimental conditions resembling those found in water purification. In our examination of the relevant literature, we have not found previously reported evidence for the use of reactive minerals in water sanitization. The results from this proof-of-concept experiment may have important implications for future directions in household water purification research.
登录
查看更多内容
影响因子：
168.9
作者：
Bhutta, Zulfiqar A.;Das, Jai K.;Black, Robert E.
通讯作者：
Black, Robert E.
影响因子：
2.3
作者：
Cohn CA;Mueller S;Wimmer E;Leifer N;Greenbaum S;Strongin DR;Schoonen MA
通讯作者：
Schoonen MA
影响因子：
11.4
作者：
Cohn, CA;Laffers, R;Schoonen, MAA
通讯作者：
Schoonen, MAA
影响因子：
2.3
作者：
Cohn, Corey A.;Pedigo, Christopher E.;Schoonen, Martin A. A.
通讯作者：
Schoonen, Martin A. A.
影响因子：
4.2
作者：
Borda, Michael J.;Elsetinow, Alicia R.;Strongin, Daniel R.
通讯作者：
Strongin, Daniel R.