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TiO2 nanoparticles in irrigation water mitigate impacts of aged Ag nanoparticles on soil microorganisms, Arabidopsis thaliana plants, and Eisenia fetida earthworms.
Environ Res. 2019 05; 172:202-215.ER

Abstract

Treated wastewater is reclaimed to irrigate crops in a growing number of arid and semi-arid areas. In order to study the impacts of metallic nanoparticles (NPs) present in treated wastewater on soil ecosystems, a soil micro-ecosystem containing Arabidopsis thaliana plants, soil microorganisms, and Eisenia fetida earthworms was developed. The soil was irrigated with deionized water containing environmentally relevant concentrations of 70 µg/L of TiO2 NPs; or 20 µg/L of an Ag mixture, which included 90% (w/w) Ag2S NPs, 7.5% (w/w) Ag0 NPs, and 2.5% (w/w) Ag+ to represent speciation of aged Ag NPs in treated wastewater; or a combination of the TiO2 NPs and the Ag mixture to reflect the frequent presence of both types of materials in treated wastewater. It was found that TiO2 NPs alone were not toxic to the soil micro-ecosystem. Irrigation water containing 20 µg/L of the Ag mixture significantly reduced the soil microbial biomass, and inhibited the growth of plants and earthworms; however, a combination of 70 µg/L of TiO2 and 20 µg/L of Ag did not show toxic impact on organism growth compared to the Control of deionized water irrigation. Taken together, these results indicate the importance of investigating the effects of different nanomaterials in combination as they are introduced to the environment-with environmentally relevant concentrations and speciation-instead of only selecting a single NP type or residual ion. Moreover, the results of this study support the safe application of reclaimed water from wastewater treatment plants for use in agricultural lands in regard to limited concentrations of aged NPs (i.e., TiO2 and Ag) if present in combination.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, Southern Illinois University, 1230 Lincoln Dr., Carbondale, IL 62901, USA; Materials Technology Center, Southern Illinois University, 1245 Lincoln Dr., Carbondale, IL 62901, USA. Electronic address: jialiu@siu.edu.Department of Civil and Environmental Engineering, Southern Illinois University, 1230 Lincoln Dr., Carbondale, IL 62901, USA.Department of Chemistry and Biochemistry, Southern Illinois University, 1245 Lincoln Dr., Carbondale, IL 62901, USA; Materials Technology Center, Southern Illinois University, 1245 Lincoln Dr., Carbondale, IL 62901, USA.Department of Plant Biology, Southern Illinois University, 1125 Lincoln Dr., Carbondale, IL 62901, USA.Department of Civil and Environmental Engineering, Southern Illinois University, 1230 Lincoln Dr., Carbondale, IL 62901, USA.Department of Chemistry and Biochemistry, Southern Illinois University, 1245 Lincoln Dr., Carbondale, IL 62901, USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30818230

Citation

Liu, Jia, et al. "TiO2 Nanoparticles in Irrigation Water Mitigate Impacts of Aged Ag Nanoparticles On Soil Microorganisms, Arabidopsis Thaliana Plants, and Eisenia Fetida Earthworms." Environmental Research, vol. 172, 2019, pp. 202-215.
Liu J, Williams PC, Goodson BM, et al. TiO2 nanoparticles in irrigation water mitigate impacts of aged Ag nanoparticles on soil microorganisms, Arabidopsis thaliana plants, and Eisenia fetida earthworms. Environ Res. 2019;172:202-215.
Liu, J., Williams, P. C., Goodson, B. M., Geisler-Lee, J., Fakharifar, M., & Gemeinhardt, M. E. (2019). TiO2 nanoparticles in irrigation water mitigate impacts of aged Ag nanoparticles on soil microorganisms, Arabidopsis thaliana plants, and Eisenia fetida earthworms. Environmental Research, 172, 202-215. https://doi.org/10.1016/j.envres.2019.02.010
Liu J, et al. TiO2 Nanoparticles in Irrigation Water Mitigate Impacts of Aged Ag Nanoparticles On Soil Microorganisms, Arabidopsis Thaliana Plants, and Eisenia Fetida Earthworms. Environ Res. 2019;172:202-215. PubMed PMID: 30818230.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - TiO2 nanoparticles in irrigation water mitigate impacts of aged Ag nanoparticles on soil microorganisms, Arabidopsis thaliana plants, and Eisenia fetida earthworms. AU - Liu,Jia, AU - Williams,Philip C, AU - Goodson,Boyd M, AU - Geisler-Lee,Jane, AU - Fakharifar,Masoud, AU - Gemeinhardt,Max E, Y1 - 2019/02/08/ PY - 2018/08/30/received PY - 2019/01/11/revised PY - 2019/02/07/accepted PY - 2019/3/1/pubmed PY - 2020/1/3/medline PY - 2019/3/1/entrez KW - Arabidopsis KW - Earthworm KW - Irrigation KW - Microorganism KW - Nanoparticle KW - Wastewater SP - 202 EP - 215 JF - Environmental research JO - Environ Res VL - 172 N2 - Treated wastewater is reclaimed to irrigate crops in a growing number of arid and semi-arid areas. In order to study the impacts of metallic nanoparticles (NPs) present in treated wastewater on soil ecosystems, a soil micro-ecosystem containing Arabidopsis thaliana plants, soil microorganisms, and Eisenia fetida earthworms was developed. The soil was irrigated with deionized water containing environmentally relevant concentrations of 70 µg/L of TiO2 NPs; or 20 µg/L of an Ag mixture, which included 90% (w/w) Ag2S NPs, 7.5% (w/w) Ag0 NPs, and 2.5% (w/w) Ag+ to represent speciation of aged Ag NPs in treated wastewater; or a combination of the TiO2 NPs and the Ag mixture to reflect the frequent presence of both types of materials in treated wastewater. It was found that TiO2 NPs alone were not toxic to the soil micro-ecosystem. Irrigation water containing 20 µg/L of the Ag mixture significantly reduced the soil microbial biomass, and inhibited the growth of plants and earthworms; however, a combination of 70 µg/L of TiO2 and 20 µg/L of Ag did not show toxic impact on organism growth compared to the Control of deionized water irrigation. Taken together, these results indicate the importance of investigating the effects of different nanomaterials in combination as they are introduced to the environment-with environmentally relevant concentrations and speciation-instead of only selecting a single NP type or residual ion. Moreover, the results of this study support the safe application of reclaimed water from wastewater treatment plants for use in agricultural lands in regard to limited concentrations of aged NPs (i.e., TiO2 and Ag) if present in combination. SN - 1096-0953 UR - https://www.unboundmedicine.com/medline/citation/30818230/TiO2_nanoparticles_in_irrigation_water_mitigate_impacts_of_aged_Ag_nanoparticles_on_soil_microorganisms_Arabidopsis_thaliana_plants_and_Eisenia_fetida_earthworms_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0013-9351(19)30083-0 DB - PRIME DP - Unbound Medicine ER -