重金属对浒苔吸收硝酸盐的动力学特性影响

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Abstract

In order to investigate the response of the macroalgae to heavy metal contamination, the influence of three heavy metal ions(Cu(Ⅱ), Zn(Ⅱ) and Pb(Ⅱ)) on the uptake of nitrate by Ulva prolifera was investigated. Kinetic parameters related to nitrate uptake in different trials were determined by the batch culture experiment in the laboratory. The results showed that the uptake of nitrate by Ulva prolifera was promoted at low concentrations of Cu(Ⅱ)(<0.04mg/L) and Zn(Ⅱ)(<0.12mg/L) and inhibited at high concentrations(Cu(Ⅱ)>0.10mg/L and Zn(Ⅱ)>0.20mg/L). Pb(Ⅱ) played a negative role in the uptake of nitrate by Ulva prolifera at all tested concentrations. The inhibition rate of the maximum absorption rate of nitrate(V_max) were calculated to be 0.23mg/L, 0.66mg/L, and 0.63mg/L for Cu(Ⅱ), Zn(Ⅱ), and Pb(Ⅱ), respectively. The inhibition effects of the three heavy metals at concentrations >0.5mg/L on Ulva prolifera nitrate uptake were observed to be in the order of Cu(Ⅱ) >Pb(Ⅱ) >Zn(Ⅱ).

Key words： Ulva prolifera nitrate heavy metals

Received: 30 September 2015

PACS:

X171.5

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	Articles by authors
	WU Lao-wu
	HAN Xiu-rong
	WU Ting
	DU Jin
	SHI Xiao-yong

Cite this article:

WU Lao-wu,HAN Xiu-rong,WU Ting等. Effects of heavy metals on the uptake of nitrate by Ulva prolifera.[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 1173-1180.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I4/1173

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