Nanotoxicity of 2D Molybdenum Disulfide, MoS2, Nanosheets on Beneficial Soil Bacteria, Bacillus cereus and Pseudomonas aeruginosa

被引:15
作者
Bae, Michael [1 ]
Oh, Jun Kyun [2 ]
Liu, Shuhao [1 ]
Nagabandi, Nirup [1 ]
Yegin, Yagmur [1 ]
DeFlorio, William [1 ]
Cisneros-Zevallos, Luis [3 ,4 ]
Scholar, Ethan M. A. [1 ,5 ]
机构
[1] Texas A&M Univ, Artie McFerrin Dept Chem Engn, College Stn, TX 77843 USA
[2] Dankook Univ, Dept Polymer Sci & Engn, 152 Jukjeon Ro, Yongin 16890, Gyeonggi Do, South Korea
[3] Texas A&M Univ, Dept Nutr & Food Sci, College Stn, TX 77843 USA
[4] Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843 USA
[5] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
基金
美国国家科学基金会; 美国食品与农业研究所;
关键词
MoS2; nanomaterials; 2D nanosheets; nanotoxicity; soil bacteria; WALL TEICHOIC-ACID; SINGLE-LAYER; ZNO NANOPARTICLES; GRAPHENE OXIDE; WATER; EVOLUTION; ADHESION; DEGRADATION; SPECIATION; INHIBITION;
D O I
10.3390/nano11061453
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Concerns arising from accidental and occasional releases of novel industrial nanomaterials to the environment and waterbodies are rapidly increasing as the production and utilization levels of nanomaterials increase every day. In particular, two-dimensional nanosheets are one of the most significant emerging classes of nanomaterials used or considered for use in numerous applications and devices. This study deals with the interactions between 2D molybdenum disulfide (MoS2) nanosheets and beneficial soil bacteria. It was found that the log-reduction in the survival of Gram-positive Bacillus cereus was 2.8 (99.83%) and 4.9 (99.9988%) upon exposure to 16.0 mg/mL bulk MoS2 (macroscale) and 2D MoS2 nanosheets (nanoscale), respectively. For the case of Gram-negative Pseudomonas aeruginosa, the log-reduction values in bacterial survival were 1.9 (98.60%) and 5.4 (99.9996%) for the same concentration of bulk MoS2 and MoS2 nanosheets, respectively. Based on these findings, it is important to consider the potential toxicity of MoS2 nanosheets on beneficial soil bacteria responsible for nitrate reduction and nitrogen fixation, soil formation, decomposition of dead and decayed natural materials, and transformation of toxic compounds into nontoxic compounds to adequately assess the environmental impact of 2D nanosheets and nanomaterials.
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页数:14
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