石莼对海水中Zn^(2+)的生物指示作用研究  

Study on Ulva Lactuca as Biological Indicator to Zn^(2+) in Seawater

作　　者：常雯 郭小路 刘菁 刘志国 于贞贞 高渭 张芹 陈聪 CHANG Wen;GUO Xiaolu;LIU Jing;LIU Zhiguo;YU Zhenzhen;GAO Wei;ZHANG Qin;CHEN Cong(Dongying Ocean Development Research Institute;Fengdu Environmental Monitoring Station,Chongqing 408299,China;Chongqing Ecological Environment Monitoring Center,Chongqing 401102,China)

机构地区：[1]东营市海洋发展研究院,山东东营257000 [2]丰都县生态环境监测站,重庆丰都408299 [3]重庆市生态环境监测中心,重庆401102

出　　处：《环境影响评价》2022年第1期68-76,共9页Environmental Impact Assessment

基　　金：山东省财政农业生产发展资金(SF1805301301)。

摘　　要：石莼是近海常见的大型藻类,其新陈代谢过程受Zn干扰,有成为海水Zn生物指示剂的潜力。本研究通过模拟石莼(Ulva lactuca)对Zn^(2+)的生物利用过程,分析Zn^(2+)在石莼藻体表面吸附(外化)和藻体利用(内化)的分配特征,衡量石莼作为近海Zn污染生物指示因子的可能性。结果表明,培养初期(0~72 h),石莼对Zn^(2+)的富集主要为外化作用;随着培养时间延长,石莼对Zn^(2+)的富集逐渐转为内化作用;该体系石莼对Zn^(2+)的最终内化量为10.35μg·g^(-1),外化量为9.14μg·g^(-1),石莼对Zn有明显的富集行为。同时,吸附过程的线性拟合关系明显优于吸收过程,培养后期拟合程度要优于培养初期。体系中吸附吸收量与溶液中的Zn浓度和TOC浓度存在明显现象关系,且线性关系随培养时间延长逐渐增加。综上,石莼可作为自然条件下监控近海Zn的重要生物指示因子。This study simulates the bio utilization process of Ulva lactuca for the Zn^(2+),analyzes the distribution characteristics of Zn^(2+)on Ulva algae surface(externalization)and algae inner(internalization),and measure the possibility of Ulva lactuca as a biological indicator of offshore Zn pollution.The results showed that at the initial stage of culture(0~72 h),the enrichment of Ulva lactuca for Zn^(2+)was mainly externalization;as the culture time prolonged,the enrichment of Zn^(2+)by Ulva lactuca gradually turned to internalization.The final internalization amount of Zn^(2+)is 10.35μg·g^(-1) and the externalization amount is 9.14μg·g^(-1).Ulva lactuca has obvious enrichment behavior for Zn.At the same time,the linear fitting relationship of the adsorption process is obviously better than that of the uptake process,and the fitting degree in the later stage of the culture is better than that of the initial stage of the culture.The adsorption capacity in the system has an obvious relationship with the concentration of Zn and TOC in the solution,and the linear relationship gradually increases with the extension of the culture time.In summary,Ulva lactuca has become an important biological indicator for monitoring offshore Zn under natural conditions.

关 键 词：石莼 ZN 海水 生物指示因子 

分 类 号：X173[环境科学与工程—环境科学]