Influence of environmental factors on arsenic accumulation and biotransformation using the aquatic plant species Hydrilla verticillata

作     者：Yuan Zhao Zhuo Zhen Zhenhong Wang Liqing Zeng Changzhou Yan Yuan Zhao;Zhuo Zhen;Zhenhong Wang;Liqing Zeng;Changzhou Yan

作者机构：Key Laboratory of Urban Environment and HealthFujian Key Laboratory of Watershed EcologyInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of SciencesBeijing 100049China School of Chemistry and EnvironmentFujian Province Key Laboratory of Modern Analytical Science and Separation TechnologyMinnan Normal UniversityZhangzhou 363000China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第4期

页      面：244-252页

核心收录：

学科分类：07[理学] 08[工学] 09[农学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：supported by National Natural Science Foundation of China(No.21577138) 

主　　题：Phytoremediation Orthogonal design pH Phosphorus Nitrogen 

摘      要：Hydrilla verticillata(waterthyme)has been successfully used for phytoremediation in arsenic(As)contaminated *** evaluate the effects of environmental factors on phytoremediation,this study conducted a series of orthogonal design experiments to determine optimal conditions,including phosphorus(P),nitrogen(N),and arsenate(As(Ⅴ))concentrations and initial pH levels,for As accumulation and biotransformation using this aquatic plant species,while also analyzing As species transformation in culture media after 96-hr *** of variance and the signal-to-noise ratio were used to identify both the effects of these environmental factors and their optimal conditions for this *** indicated that both N and P significantly impacted accumulation,and N was essential in As species *** N and intermediate P levels were critical to As accumulation and biotransformation by ***,while high N and low P levels were beneficial to As species transformation in culture *** highest total arsenic accumulation was(197.2±17.4)μg/g dry weight when As(V)was at level 3(375μg/L),N at level 2(4 mg/L),P at level 1(0.02 mg/L),and pH at level 2(7).Although *** is highly efficient in removing As(Ⅴ)from aquatic environments,its use could be potentially harmful to both humans and the natural environment due to its release of highly toxic *** cost-effective and ecofriendly phytoremediation of As-contaminated water,both N and P are helpful in regulating As accumulation and transformation in plants.