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Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite.
Environmental Microbiology ( IF 4.3 ) Pub Date : 2020-03-07 , DOI: 10.1111/1462-2920.14949
Bongkotrat Suyamud 1, 2 , John Ferrier 2 , Laszlo Csetenyi 3 , Duangrat Inthorn 4, 5 , Geoffrey Michael Gadd 2, 6
Affiliation  

Struvite (magnesium ammonium phosphate - MgNH4 PO4 ·6H2 O), which can extensively crystallize in wastewater treatments, is a potential source of N and P as fertilizer, as well as a means of P conservation. However, little is known of microbial interactions with struvite which would result in element release. In this work, the geoactive fungus Aspergillus niger was investigated for struvite transformation on solid and in liquid media. A. niger was capable of solubilizing natural (fragments and powder) and synthetic struvite when incorporated into solid medium, with accompanying acidification of the media, and extensive precipitation of magnesium oxalate dihydrate (glushinskite, Mg(C2 O4 ).2H2 O) occurring under growing colonies. In liquid media, A. niger was able to solubilize natural and synthetic struvite releasing mobile phosphate (PO4 3- ) and magnesium (Mg2+ ), the latter reacting with excreted oxalate resulting in precipitation of magnesium oxalate dihydrate which also accumulated within the mycelial pellets. Struvite was also found to influence the morphology of A. niger mycelial pellets. These findings contribute further understanding of struvite solubilization, element release and secondary oxalate formation, relevant to the biogeochemical cycling of phosphate minerals, and further directions utilizing these mechanisms in environmental biotechnologies such as element biorecovery and biofertilizer applications. This article is protected by copyright. All rights reserved.

中文翻译:

黑曲霉对鸟粪石的生物转化:磷酸盐释放和镁生物矿化为辉石。

鸟粪石(磷酸镁铵-MgNH4 PO4·6H2 O)在废水处理中会大量结晶,是氮和磷的潜在肥料,也是养分磷的一种手段。然而,鲜有微生物与鸟粪石的相互作用会导致元素释放。在这项工作中,研究了土壤活性真菌黑曲霉在固体和液体介质中鸟粪石的转化。当将黑曲霉掺入固体培养基中时,它能够溶解天然(碎片和粉末)和合成鸟粪石,同时伴随着介质的酸化作用,草酸镁二水合物(粉锌矿,Mg(C2 O4).2H2 O)的大量沉淀不断增长的殖民地。在液体介质中,A。尼日尔能够溶解天然和合成鸟粪石,从而释放出可移动的磷酸盐(PO4 3-)和镁(Mg2 +),后者与排出的草酸盐反应,导致草酸盐二水合镁沉淀,其也积聚在菌丝体团块中。鸟粪石也被发现会影响黑曲霉菌丝体颗粒的形态。这些发现有助于人们进一步理解鸟粪石的溶解,元素释放和草酸二次生成,这与磷酸盐矿物的生物地球化学循环有关,并为在环境生物技术(例如元素生物回收和生物肥料应用)中利用这些机制提供了进一步的指导。本文受版权保护。版权所有。后者与排出的草酸盐反应,导致草酸镁二水合物沉淀,其也积聚在菌丝体沉淀物中。鸟粪石也被发现会影响黑曲霉菌丝体颗粒的形态。这些发现有助于人们进一步理解鸟粪石的溶解,元素释放和草酸二次生成,这与磷酸盐矿物的生物地球化学循环有关,并为在环境生物技术(例如元素生物回收和生物肥料应用)中利用这些机制提供了进一步的指导。本文受版权保护。版权所有。后者与排出的草酸盐反应,导致草酸镁二水合物沉淀,其也积聚在菌丝体沉淀物中。鸟粪石也被发现会影响黑曲霉菌丝体颗粒的形态。这些发现有助于人们进一步理解鸟粪石的溶解,元素释放和草酸二次生成,这与磷酸盐矿物的生物地球化学循环有关,并为在环境生物技术(例如元素生物回收和生物肥料应用)中利用这些机制提供了进一步的指导。本文受版权保护。版权所有。元素释放和草酸的二次生成,与磷酸盐矿物的生物地球化学循环有关,以及在环境生物技术(例如元素生物回收和生物肥料应用)中利用这些机制的进一步指导。本文受版权保护。版权所有。元素释放和草酸的二次生成,与磷酸盐矿物的生物地球化学循环有关,以及在环境生物技术(例如元素生物回收和生物肥料应用)中利用这些机制的进一步指导。本文受版权保护。版权所有。
更新日期:2020-04-01
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