Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species

Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species

We developed the effect of titanium dioxide nanoparticles (nano-TiO2) on the bioaccumulation and biotransformation of arsenic (As), which remain largely unknown. We thus exposed two freshwater algae (Microcystis aeruginosa and Scenedesmus obliquus) to inorganic As with the aim of increasing our unde...

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Main Authors: Zhuanxi Luo, Zhenhong Wang, Yameng Yan, Jinli Li, Changzhou Yan, Baoshan Xing
Format: Article
Language:English
Published: Elsevier 2018-01-01
Series:MethodsX
Online Access:http://www.sciencedirect.com/science/article/pii/S2215016118300906
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spelling doaj-1ba63a9440ce440cb8da46fbc950332b2020-11-25T01:17:51ZengElsevierMethodsX2215-01612018-01-015620625Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae speciesZhuanxi Luo0Zhenhong Wang1Yameng Yan2Jinli Li3Changzhou Yan4Baoshan Xing5Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA; Corresponding author at: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA; College of Chemistry and Environment, Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, ChinaKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaStockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USAWe developed the effect of titanium dioxide nanoparticles (nano-TiO2) on the bioaccumulation and biotransformation of arsenic (As), which remain largely unknown. We thus exposed two freshwater algae (Microcystis aeruginosa and Scenedesmus obliquus) to inorganic As with the aim of increasing our understanding on As bioaccumulation and methylation in the presence of nano-TiO2. Direct evidence of TEM and EDX image showed that nano-TiO2 (anatase) entered the exposed algae. Thus, nano-TiO2 as carriers boosted arsenic accumulation and methylation in these two algae species, which varied with both inorganic As speciation and algae species. Specifically, nano-TiO2 could enhance markedly arsenate accumulation in M. aerugginosa and arsenite accumulation in S. obliquus. Similarly, we found higher content of As methylation in M. aeruginosa of arsenite with 2 mg L−1 of nano-TiO2 treatment and in S. obliquus of arsenate treatment. Additionally, S. obliquus exhibited higher As methylation compared to M. aeruginosa, being more sensitive to As associated with nano-TiO2 than M. aeruginosa. Due to changes in pH levels inside these exposed algae, the As dissociation from nano-TiO2 inside algal cell enhanced As methylation. Accordingly, the potential influence of nanoparticles on the bioaccumulation and biotransformation of their co-contaminants deserves more attention. • Nano-TiO2 entry is assumed to promote As accumulation into exposed algae. • Nano-TiO2 had different carrying capacities for different forms of As and algae. • As dissociation from nano-TiO2 is assumed to enhance As methylation in algae. Method name: Association of inorganic As and nano-TiO2 in algae, Keywords: Bioaccumulation, Engineered Nanomaterials, Dissociation, Algae, Trojan horsehttp://www.sciencedirect.com/science/article/pii/S2215016118300906
collection DOAJ
language English
format Article
sources DOAJ
author Zhuanxi Luo
Zhenhong Wang
Yameng Yan
Jinli Li
Changzhou Yan
Baoshan Xing
spellingShingle Zhuanxi Luo
Zhenhong Wang
Yameng Yan
Jinli Li
Changzhou Yan
Baoshan Xing
Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
MethodsX
author_facet Zhuanxi Luo
Zhenhong Wang
Yameng Yan
Jinli Li
Changzhou Yan
Baoshan Xing
author_sort Zhuanxi Luo
title Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
title_short Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
title_full Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
title_fullStr Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
title_full_unstemmed Methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
title_sort methods of determining titanium dioxide nanoparticles enhance inorganic arsenic bioavailability and methylation in two freshwater algae species
publisher Elsevier
series MethodsX
issn 2215-0161
publishDate 2018-01-01
description We developed the effect of titanium dioxide nanoparticles (nano-TiO2) on the bioaccumulation and biotransformation of arsenic (As), which remain largely unknown. We thus exposed two freshwater algae (Microcystis aeruginosa and Scenedesmus obliquus) to inorganic As with the aim of increasing our understanding on As bioaccumulation and methylation in the presence of nano-TiO2. Direct evidence of TEM and EDX image showed that nano-TiO2 (anatase) entered the exposed algae. Thus, nano-TiO2 as carriers boosted arsenic accumulation and methylation in these two algae species, which varied with both inorganic As speciation and algae species. Specifically, nano-TiO2 could enhance markedly arsenate accumulation in M. aerugginosa and arsenite accumulation in S. obliquus. Similarly, we found higher content of As methylation in M. aeruginosa of arsenite with 2 mg L−1 of nano-TiO2 treatment and in S. obliquus of arsenate treatment. Additionally, S. obliquus exhibited higher As methylation compared to M. aeruginosa, being more sensitive to As associated with nano-TiO2 than M. aeruginosa. Due to changes in pH levels inside these exposed algae, the As dissociation from nano-TiO2 inside algal cell enhanced As methylation. Accordingly, the potential influence of nanoparticles on the bioaccumulation and biotransformation of their co-contaminants deserves more attention. • Nano-TiO2 entry is assumed to promote As accumulation into exposed algae. • Nano-TiO2 had different carrying capacities for different forms of As and algae. • As dissociation from nano-TiO2 is assumed to enhance As methylation in algae. Method name: Association of inorganic As and nano-TiO2 in algae, Keywords: Bioaccumulation, Engineered Nanomaterials, Dissociation, Algae, Trojan horse
url http://www.sciencedirect.com/science/article/pii/S2215016118300906
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