Personal Care Products

Ying, Guang‐Guo

doi:10.1002/9781118346747.ch18

Cited by 1 publication

(1 citation statement)

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“…Triclosan (TCS) and galaxolide (HHCB) are two ingredients widely used in personal care products and are ubiquitous in a variety of aquatic environments. 6 For example, our chemical monitoring results show that TCS and HHCB were the most frequently detected hydrophobic chemicals used in personal care products in subtropical urban rivers, with concentrations of ≤1 μg/g od dry weight (dw). 7 Because of their hydrophobic nature, these two chemicals may sorb to settling particles and bioaccumulate in deposit-feeding macroinvertebrates.…”

Section: ■ Introductionmentioning

confidence: 96%

Bioaccumulation and Biotransformation of Triclosan and Galaxolide in the Freshwater Oligochaete Limnodrilus hoffmeisteri in a Water/Sediment Microcosm

Feng

Ying

Pan

et al. 2018

Environ. Sci. Technol.

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Personal care products are widely used in our daily life in considerable quantities and discharged via the down-the-drain route to aquatic environments, resulting in potential risks to aquatic organisms. We investigated bioaccumulation and biotransformation of two widely used personal care products, triclosan (TCS) and galaxolide (HHCB) spiked to sediment, in the oligochaete worm Limnodrilus hoffmeisteri in water/sediment microcosms. After 7 days of sediment exposure to 3.1 μg of TCS or HHCB/g of dry weight sediment, the accumulation of TCS and HHCB in L. hoffmeisteri reached equilibrium, at which point the biota-sediment accumulation factors (BSAFs) were 2.07 and 2.50 for TCS and HHCB, respectively. The presence of L. hoffmeisteri significantly accelerated the dissipation of the levels of TCS and HHCB in the microcosms, with approximately 9.03 and 2.90% of TCS and HHCB, respectively, eliminated from the water/sediment systems after exposure for 14 days in the presence of worms. Two biotransformation products, methyl triclosan and triclosan O-sulfate, were identified for TCS in worm tissue, whereas only methyl triclosan was identified in the sediment. Unlike TCS, no evidence of biotransformation products was found for HHCB in either worm tissue or sediment. These experiments demonstrate that L. hoffmeisteri biotransformed TCS through methylation and sulfation, whereas HHCB biotransformation was undetectable.

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Section: ■ Introductionmentioning

confidence: 96%