Behavior of TiO2 and CeO2 Nanoparticles and Polystyrene Nanoplastics in Bottled Mineral, Drinking and Lake Geneva Waters. Impact of Water Hardness and Natural Organic Matter on Nanoparticle Surface Properties and Aggregation

被引:62
作者
Ramirez, Lina [1 ]
Gentile, Stephan Ramseier [2 ]
Zimmermann, Stephane [2 ]
Stoll, Serge [1 ]
机构
[1] Univ Geneva, Inst FA Forel, Physicochim Environm, Uni Carl Vogt, 66 Bd Carl Vogt, CH-1211 Geneva 4, Switzerland
[2] Ind Boards Geneva, SIG, 2 Ch Chateau Bloch, CH-1211 Geneva 23, Switzerland
来源
WATER | 2019年 / 11卷 / 04期
关键词
TiO2; nanoparticles; CeO2; polystyrene nanoplastics; water hardness; NOM concentration; nanoparticle stability and aggregation; TITANIUM-DIOXIDE NANOPARTICLES; METAL-OXIDE NANOPARTICLES; INORGANIC COLLOIDS; FULVIC-ACIDS; STABILITY; ADSORPTION; PARTICLES; REMOVAL; PH;
D O I
10.3390/w11040721
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Intensive use of engineered nanoparticles (NPs) in daily products ineluctably results in their release into aquatic systems and consequently into drinking water resources. Therefore, understanding NPs behavior in various waters from naturel to mineral waters is crucial for risk assessment evaluation and the efficient removal of NPs during the drinking water treatment process. In this study, the impact of relevant physicochemical parameters, such as pH, water hardness, and presence of natural organic matter (NOM) on the surface charge properties and aggregation abilities of both NPs and nanoplastic particles is investigated. TiO2, CeO2, and Polystyrene (PS) nanoplastics are selected, owing to their large number applications and contrasting characteristics at environmental pH. Experiments are performed in different water samples, including, ultrapure water, three bottled mineral waters, Lake Geneva, and drinking water produced from Lake Geneva. Our findings demonstrate that both water hardness and negatively charged natural organic matter concentrations, which were measured via dissolved organic carbon determination, are playing important roles. At environmental pH, when negatively charged nanoparticles are considered, specific cation adsorption is promoting aggregation so long as NOM concentration is limited. On the other hand, NOM adsorption is expected to be a key process in NPs destabilization when positively charged PS nanoplastics are considered.
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页数:14
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