胺基改性沸石同步净化水中的硝酸盐和总磷

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Abstract In this paper, modified zeolite (ZOC) was obtained by loading natural zeolite (Z) with amine group. The properties of ZOC were analyzed by static adsorption, desorption experiment, and SEM, FTIR analysis. The results showed that when the adsorption temperature was 25℃, pH was 4~9, ZOC dosage was 4g/L (ZOC dosage was 0.6g/L for single phosphate removal), and the initial concentrations of nitrate (N) and total phosphorus (TP) were 50 and 2 mg/L respectively, the removal rates of N and TP were above 83% and 96%, respectively. With 0.5 mol/L NaCl as the desorption agent, the desorption rates of N and TP were above 99% and 97%, respectively, and the removal rates of N and TP could still reach 85.7% and 98.96% after 5 times of adsorption-desorption cycles. The adsorption behavior of N and TP by ZOC conformed to Langmuir isotherm model, and the adsorption process were conformed to the pseudo-second-order kinetic model. ZOC synchronous (alone) purification of N and TP mechanism involved electrostatic attraction and ion exchange.

Key words： amine group synchronous purification nitrate and TP purification mechanism

Received: 03 April 2023

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X703

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	Articles by authors
	CUI He
	CHEN Yun-nen
	LIU Chen
	PENG Zhi-ye

Cite this article:

CUI He,CHEN Yun-nen,LIU Chen等. Amine-modified zeolite synchronously cleans nitrate and total phosphorus from water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5765-5776.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5765

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