TY - JOUR
T1 - A straightforward method for measuring the range of apparent density of microplastics
AU - Li, Lingyun
AU - Li, Mengmeng
AU - Deng, Hua
AU - Cai, Li
AU - Cai, Huiwen
AU - Yan, Beizhan
AU - Hu, Jun
AU - Shi, Huahong
N1 - Publisher Copyright:
© 2018
PY - 2018/10/15
Y1 - 2018/10/15
N2 - Density of microplastics has been regarded as the primary property that affect the distribution and bioavailability of microplastics in the water column. For measuring the density of microplastis, we developed a simple and rapid method based on density gradient solutions. In this study, we tested four solvents to make the density gradient solutions, i.e., ethanol (0.8 g/cm3), ultrapure water (1.0 g/cm3), saturated NaI (1.8 g/cm3) and ZnCl2 (1.8 g/cm3). Density of microplastics was measured via observing the float or sink status in the density gradient solutions. We found that density gradient solutions made from ZnCl2 had a larger uncertainty in measuring density than that from NaI, most likely due to a higher surface tension of ZnCl2 solution. Solutions made from ethanol, ultrapure water, and NaI showed consistent density results with listed densities of commercial products, indicating that these density gradient solutions were suitable for measuring microplastics with a density range of 0.8–1.8 g/cm3.
AB - Density of microplastics has been regarded as the primary property that affect the distribution and bioavailability of microplastics in the water column. For measuring the density of microplastis, we developed a simple and rapid method based on density gradient solutions. In this study, we tested four solvents to make the density gradient solutions, i.e., ethanol (0.8 g/cm3), ultrapure water (1.0 g/cm3), saturated NaI (1.8 g/cm3) and ZnCl2 (1.8 g/cm3). Density of microplastics was measured via observing the float or sink status in the density gradient solutions. We found that density gradient solutions made from ZnCl2 had a larger uncertainty in measuring density than that from NaI, most likely due to a higher surface tension of ZnCl2 solution. Solutions made from ethanol, ultrapure water, and NaI showed consistent density results with listed densities of commercial products, indicating that these density gradient solutions were suitable for measuring microplastics with a density range of 0.8–1.8 g/cm3.
KW - Apparent density
KW - Density gradient solutions
KW - Microplastics
UR - https://www.scopus.com/pages/publications/85047060572
U2 - 10.1016/j.scitotenv.2018.05.166
DO - 10.1016/j.scitotenv.2018.05.166
M3 - 文章
C2 - 29791889
AN - SCOPUS:85047060572
SN - 0048-9697
VL - 639
SP - 367
EP - 373
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -