Virus Removal by Biogenic Cerium
Virus Removal by Biogenic Cerium
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DOI：
10.1021/es100100p
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发表时间：
2010-08-15
影响因子：
11.4
通讯作者：
Verstraete, Willy
中科院分区：
文献类型：
--
作者：
De Gusseme, Bart;Du Laing, Gijs;Verstraete, Willy
已知稀土元素Ce在+III和+IV氧化态具有抗真菌和抗菌性能。本研究报道了一种通过在细菌载体基质上结合Ce(III)来去除饮用水中病毒的创新策略。在淡水氧化锰细菌(MOB)、盘状细长杆菌(Leptothrix Disophora)和恶臭假单胞菌MnB29的活性培养物中加入Ce(III)水溶液生成生物Ce(BIO-Ce)。X-射线吸收光谱结果表明，Ce在细菌表面以三价态存在。在以噬菌体为模型的消毒试验中，Ce(III)与细菌细胞壁磷酸基的Ce(III)离子一致。结果表明，Bio-Ce具有较好的抗病毒作用，与50 mg L-1 Bio-Ce作用2 h后，噬菌体的对数下降了44个对数。鉴于50 mg L-1作为CeNO_3的脱毒率较低，Bio-Ce中细菌载体基质的存在显著提高了病毒的脱毒效果。
The rare earth element cerium has been known to exert antifungal and antibacterial properties in the oxidation states +III and +IV This study reports on an innovative strategy for virus removal in drinking water by the combination of Ce(III) on a bacterial carrier matrix. The biogenic cerium (bio-Ce) was produced by addition of aqueous Ce(III) to actively growing cultures of either freshwater manganese-oxidizing bacteria (MOB) Leptothrix discophora or Pseudomonas putida MnB29 X-ray absorption spectroscopy results indicated that Ce remained in its trivalent state on the bacterial surface The spectra were consistent with Ce(III) ions associated with the phosphoryl groups of the bacterial cell wall In disinfection assays using a bacteriophage as model, it was demonstrated that bio-Ce exhibited antiviral properties A 44 log decrease of the phage was observed after 2 h of contact with 50 mg L-1 bio-Ce Given the fact that virus removal with 50 mg L-1 Ce(III) as CeNO3 was lower, the presence of the bacterial carrier matrix in bio-Ce significantly enhanced virus removal