HOT OFF THE PRESS

Ecometrix welcomes
Dr. Langping Wu to the team

Dr. Langping Wu has extensive research experience in investigating the fate and transport of legacy and emerging organic contaminants in the environment, including bioretention cells, water bodies, plants and higher organisms. Specifically, her research focused on characterizing the transformation mechanisms of organic contaminants using multi-element compound-specific isotope analysis (CSIA).

Dr. Langping Wu Dr. Langping Wu

In one of her most recent publications (Wu et al., 2021, Water Res.) the phototransformation mechanisms of 1H-benzotriazole were characterized using CSIA. 1H-benzotriazole is part of a larger family of benzotriazoles, which are a group of nitrogen containing compounds commonly used as lubricants, polymer stabilizers, corrosion inhibitors, and anti-icing fluid components. It is frequently detected in urban runoff, wastewater, and receiving aquatic environments.

Although CSIA has been widely applied to evaluate the origin, fate and in situ transformation pathways for common halogenated contaminants in the environmental, Dr. Wu’s research has explored other innovative uses for the methodology. Her research revealed that the direct and indirect photolysis of 1H-benzotriazole involved two alternative pathways. In direct photolysis of 1H-benzotriazole, significant nitrogen and carbon isotope enrichment factors indicated that an initial N-N bond cleavage was followed by a C-N bond cleavage that resulted in nitrogen elimination. In comparison, indirect photolysis was dominated by aromatic hydroxylation associated with small carbon, moderate hydrogen, and negligible nitrogen isotope enrichment factors.

The results of this study highlighted the potential for multi-element CSIA application to track 1H-benzotriazole degradation in aquatic environments and supported the increasing importance of CSIA as an emerging tool for assessing environmental impacts.

Explore additional relevant studies from Dr. Wu on her Google Scholar page.