镁改性污泥基生物炭去除水中磷和抗生素

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Abstract A series of Mg modified biochar (Mg_xBC) were prepared from calcination of municipal waste sludge after being impregnated with MgCl₂ to serve as the adsorbent for P recovery and as the catalyst for peroxymonosulfate (PMS) activation and antibiotic degradation. Results showed that calcination atmosphere (i.e., air-deficient, N₂, vacuum) and MgCl₂ concentration exhibited significant influence on P adsorption. The Mg₁BC prepared in N₂ atmosphere after being treated with 1mol/L MgCl₂ could become the best adsorbent. According to the Langmuir equation, the maximum adsorption capacity of Mg₁BC for P was 63.2mg/g, about three times the unmodified BC. Under the studied conditions, Mg₁BC could remove 99% of P above pH₀ 4, and all of the common water co-existing constituents showed no substantial influence on P adsorption, indicating that Mg₁BC is applicable for practical wastewater treatment. Besides, Mg₁BC could also activate PMS and enhance the degradation of the co-existing antibiotics like TC and SMT.

Key words： Mg modification biochar phosphate antibiotics adsorption catalytic degradation

Received: 16 January 2022

PACS:

X703.1

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	Articles by authors
	YANG Yu-hong
	KOU Li-dong
	FAN Qing-feng
	WANG Jing

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YANG Yu-hong,KOU Li-dong,FAN Qing-feng等. Removal of phosphate and antibiotics by magnesium modified sludge - derived biochar[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4137-4144.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I9/4137

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