<em>Sakaguchia cladiensis</em>对磺胺甲嘧啶/铜复合污染中抗生素的降解

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Abstract

To understand the characteristics of sulfamethazine (SMZ) biodegradation in the polluted environment where SMZ and Cu²⁺ co-existed, this study focused on the bio-treatment of SMZ-Cu²⁺ in different conditions by Sakaguchia cladiensis (named A5), a strain resistant to sulfamethazine, which was screened and isolated from the soil of a livestock and poultry farm (Guangzhou, China). The results showed that, with the presence of single SMZ or SMZ-Cu²⁺ combined pollution in the culture medium, strain A5 still maintained a good growth trend. Sakaguchia cladiensis was an effective strain to remove SMZ from pollution system. The presence of Cu²⁺ was beneficial for A5 to decompose SMZ. The degradation rates of SMZ reached 37.3% in 3d. Under the condition of 1g/L of inoculum, 1mg/L initial concentration of SMZ, and neutral pH, the removal effect of strain A5 on SMZ was the best. The transmission electron microscope (TEM) analysis showed that the cells of strain A5 were severely damaged when SMZ and Cu²⁺ co-existed in solution, leading to the outflow of cytoplasm.

Key words： sulfamethazine copper ions combined pollution Sakaguchia cladiensis biodegradation

Received: 10 May 2019

PACS:

X172

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	Articles by authors
	ZENG Jie-yi
	ZENG Su-hang
	JI Meng-tian
	TAN Xiao
	HAN Wei-jiang
	CHEN Shuo-na

Cite this article:

ZENG Jie-yi,ZENG Su-hang,JI Meng-tian等. Biodegradation of Sulfamethazine in Sulfamethazine/Copper combined pollution by Sakaguchia cladiensis[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(12): 5293-5300.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I12/5293

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