Using Chemical Benchmarking to Determine the Persistence of Chemicals in a Swedish Lake

Zou, HongyanStockholms universitet,Institutionen för miljövetenskap och analytisk kemi (author)

AuthorCount:5;
It is challenging to measure the persistence of chemicals under field conditions. In this work, two approaches for measuring persistence in the field were compared: the chemical mass balance approach, and a novel chemical benchmarking approach. Ten pharmaceuticals, an X-ray contrast agent, and an artificial sweetener were studied in a Swedish lake. Acesulfame K was selected as a benchmark to quantify persistence using the chemical benchmarking approach. The 95% confidence intervals of the half-life for transformation in the lake system ranged from 780-5700 days for carbamazepine to <1-2 days for ketoprofen. The persistence estimates obtained using the benchmarking approach agreed well with those from the mass balance approach (1-21% difference), indicating that chemical benchmarking can be a valid and useful method to measure the persistence of chemicals under field conditions. Compared to the mass balance approach, the benchmarking approach partially or completely eliminates the need to quantify mass flow of chemicals, so it is particularly advantageous when the quantification of mass flow of chemicals is difficult. Furthermore, the benchmarking approach allows for ready comparison and ranking of the persistence of different chemicals.

Radke, MichaelStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)mirad (author)
Kierkegaard, AmelieStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)kierk (author)
MacLeod, MatthewStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)mmacl (author)
McLachlan, Michael S.Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)mmcla (author)
Stockholms universitetInstitutionen för miljövetenskap och analytisk kemi (creator_code:org_t)

In:Environmental Science and Technology: American Chemical Society (ACS)49:3, s. 1646-16530013-936X1520-5851

By the author/editor: Zou, Hongyan; Radke, Michael; Kierkegaard, Ame ...; MacLeod, Matthew; McLachlan, Micha ...

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