Different stabilities of multiwalled carbon nanotubes in fresh surface water samples

作者：Lin, Daohui; Liu, Ni; Yang, Kun^*; Xing, Baoshan; Wu, Fengchang

来源：Environmental Pollution, 2010, 158(5): 1270-1274.

DOI：10.1016/j.envpol.2010.01.020

• Nanomaterial
• Surfactant
• Environmental behavior
• Dissolved organic matter

The stability of multiwalled carbon nanotubes (MWNTs) in particulate aggregates and surfactant-facilitated suspensions after being mixed into eight types of fresh surface water samples was investigated. MWNTs in particulate aggregates could not be stabilized in any of the water samples except for the one having relatively high content of dissolved organic matter with the aid of sonication. Sodium dodecyl benzenesulfonate (SDBS), polyethylene glycol octylphenyl ether (TX100) and cetyltrimethyl ammonium bromide (CTAB) were used to prepare MWNT suspensions. SDBS- and TX100-stabilized MWNTs could partly remain suspending after being mixed into the water samples, whereas CTAB-stabilized MWNTs readily sedimentated due to the surface charge neutralization by the surface water contained negatively-charged anions and colloids. This is a first systematic study examining the stability of carbon nanotubes in natural surf

• 出版日期2010-5
• 单位中国环境科学研究院; 浙江大学