TY - JOUR
T1 - Effects of natural organic matter on separation of the hydroxylated fullerene nanoparticles by cross-flow ultrafiltration membranes from water
AU - Chae, So Ryong
AU - Noeiaghaei, Tahereh
AU - Jang, Hee Chan
AU - Sahebi, Soleyman
AU - Jassby, David
AU - Shon, Ho Kyong
AU - Park, Pyung Kyu
AU - Kim, Jong Oh
AU - Park, Jin Soo
PY - 2015/1/22
Y1 - 2015/1/22
N2 - Transport, reactivity, and microbial toxicity of engineered nanomaterials (ENMs) are significantly influenced by the size and surface charge of the nanoparticle aggregates in the environmental media in which they are contained. To remove or separate the colloidal aggregates of ENMs from the aquatic environment, it is important to understand fate and transport of ENMs, and their interaction with other environmental components. Here, we explore the effects of natural organic matter (NOM) and NaCl concentrations on the removal efficiency of hydroxylated fullerene (fullerol) nanoparticle aggregates, nC60(OH)24 by cross-flow ultrafiltration (UF) membranes. We demonstrate that the removal efficiency of nC60(OH)24 (185 nm) by the UF membrane (nominal pore size = 30 nm) was limited at approximately 30%. As NaCl concentration increased from 0 to 1.5 M NaCl, the size of nC 60(OH)24 increased from 185 nm to 1405 nm but the maximum removal efficiency remained below 60%. The presence of NOM increased the stability of nC60(OH)24 and deteriorated the retention of nC60(OH)24 by the UF membranes. The more hydrophilic NOM (i.e., fulvic acid) resulted in lower separation efficiency of nC60(OH)24 by the UF membrane than the less hydrophilic NOM (i.e., humic acid).
AB - Transport, reactivity, and microbial toxicity of engineered nanomaterials (ENMs) are significantly influenced by the size and surface charge of the nanoparticle aggregates in the environmental media in which they are contained. To remove or separate the colloidal aggregates of ENMs from the aquatic environment, it is important to understand fate and transport of ENMs, and their interaction with other environmental components. Here, we explore the effects of natural organic matter (NOM) and NaCl concentrations on the removal efficiency of hydroxylated fullerene (fullerol) nanoparticle aggregates, nC60(OH)24 by cross-flow ultrafiltration (UF) membranes. We demonstrate that the removal efficiency of nC60(OH)24 (185 nm) by the UF membrane (nominal pore size = 30 nm) was limited at approximately 30%. As NaCl concentration increased from 0 to 1.5 M NaCl, the size of nC 60(OH)24 increased from 185 nm to 1405 nm but the maximum removal efficiency remained below 60%. The presence of NOM increased the stability of nC60(OH)24 and deteriorated the retention of nC60(OH)24 by the UF membranes. The more hydrophilic NOM (i.e., fulvic acid) resulted in lower separation efficiency of nC60(OH)24 by the UF membrane than the less hydrophilic NOM (i.e., humic acid).
UR - http://www.scopus.com/inward/record.url?scp=84916629366&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916629366&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2014.11.011
DO - 10.1016/j.seppur.2014.11.011
M3 - Article
AN - SCOPUS:84916629366
VL - 140
SP - 61
EP - 68
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
ER -