Effects of heavy metals on the uptake of nitrate by Ulva prolifera.
WU Lao-wu1,2, HAN Xiu-rong1,2, WU Ting3, DU Jin1,2, SHI Xiao-yong1,2,3
1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;
2. Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;
3. National Marine Hazard Mitigation Service, Beijing 100194, China
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(Vmax) 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).
吴老五, 韩秀荣, 吴婷, 杜锦, 石晓勇. 重金属对浒苔吸收硝酸盐的动力学特性影响[J]. 中国环境科学, 2016, 36(4): 1173-1180.
WU Lao-wu, HAN Xiu-rong, WU Ting, DU Jin, SHI Xiao-yong. Effects of heavy metals on the uptake of nitrate by Ulva prolifera.. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 1173-1180.
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