阿特拉津及其代谢物在砂质壤土中的吸附

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Abstract The sorption ability of atrazine and its metabolites deethylatrazine and deisopropylatrazine onto a sandy loam soil were studied, and its influencing factors, such as the ionic strength of aqueous solution, and temperature, were also investigated. The results showed the sorption process was controlled by instantaneous equilibrium followed by a time-dependent phase until 24h, and the equilibrium sorption capacity decreased in the order of AT > DIA > DEA. The equilibrium sorption capacity and initial sorption rate constant were well described by the second order equation, and the predicted values agreed well with the experimental ones. Intraparticle diffusion model indicated that the rate of sorption was not only controlled by intraparticle diffusion for the entire sorption period. The percentage of instantaneous sorption of AT, DEA and DIA achieved from Elovich equation was 53%, 85% and 80%, respectively. The sorption isotherms of the AT, DEA and DIA were well described by the Freundlich equation and the K_f values were 1.2574, 0.7992 and 1.3201 for AT, DEA and DIA, respectively. The solution ionic strength and temperature have a significant effect on the sorption of AT, DEA and DIA for test soil. The K_f values were all decreased with the temperature and have positive correlation of ionic strength.

Key words： atrazine deethylatrazine deisopropylatrazine sorption soil

Received: 14 June 2017

PACS:	X53
	S152

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	Articles by authors
	HUO Li-juan
	REN Li
	MAO Meng
	YIN She-fang

Cite this article:

HUO Li-juan,REN Li,MAO Meng等. Sorption of atrazine and its metabolites on a sandy loam soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(1): 254-262.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2018/V38/I1/254

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