异化Mn(IV)还原菌激活及其对有机药物去除

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Abstract

In this study, sediment from JiaLing River was cultivated as inoculum of dissimilatory Mn(IV)-reducing bacteria. By using qPCR technique, this study investigated the effects of different carbon sources (glucose and Na-acetate) and different forms of manganese oxides (δ-MnO₂ and manganese ore powders) on activating dissimilatory Mn(IV)-reducing bacteria. Moreover, the most active dissimilatory Mn(IV) reducing bacteria was further tested the performance of removing 5 typical pharmaceuticals, namely carbamazepine, ibuprofen, naproxen, estradiol and diclofenac. Results demonstrated that glucose was the most suitable carbon sources while the δ-MnO₂ was the most suitable electron acceptor for the activation of dissimilatory Mn(IV)-reducing bacteria. The accumulated concentration of Mn²⁺ reached 416.03mg/L after 10d cultivation, while the total consumption of TOC was 88.24%. After 5d cultivation, removal of carbamazepine and ibuprofen by the activated dissimilatory Mn(IV)-reducing bacteria was insufficient with or without additional carbon sources. Only 11.88% of naproxen was removed by the bacteria in the presence of additional carbon sources. However, the activated dissimilatory Mn(IV)-reducing bacteria could use estradiol and diclofenac as the sole carbon source, with removal efficiency of 75.70% and 58.25%, respectively.

Key words： dissimilatory Mn(IV) reduction pharmaceuticals biological removal qPCR

Received: 05 June 2018

PACS:

X172

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	Articles by authors
	ZHAI Jun
	WANG Rong
	HUANG Ze-jin
	WANG Quan-feng
	LIU Wen-bo
	CHEN Yi-xuan

Cite this article:

ZHAI Jun,WANG Rong,HUANG Ze-jin等. Activation of dissimilatory Mn(IV) reducing bacteria and their removal of typical pharmaceuticals[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(1): 298-305.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I1/298

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