Detection of pesticides and pharmaceuticals in the River Avon (Hampshire) using the Chemcatcher passive sampler

Project Details

Description

Deployment of the Chemcatcher passive sampler at 6 sites on the Rivers Avon and wylye. Subsequent analysis using LC-QToF to identify pesticides and pharmaceuticals in the river water

Layperson's description

Project was to identify what chemicals are in the water downstream of a umber of waste water treatment works.

Key findings

Spring and Winter exhibited a similar number of compounds, with 51 in Spring and 50 in Winter. A total of 60 compounds were identified overall.
Over both seasons, EA4 exhibited the largest number of compounds at 49, whilst EA5 exhibited the lowest number of compounds at 7.

Adenine, clopidogrel, diclofenac, fluxapyroxad, griseofulvin, harman, nicotinamide, propiconazole, pyrethrin II and telmisartan were only identified during Spring.

Amantadine, bezfibrate, hydrocodone, hydroxycotinine, naproxen, norcodeine, quinidine, sulfamethoxazole and thiabendazole were only identified during Winter.

Adenine, adenosine, atrazine, atrazine-desethyl, carbamazepine, fexofenadine, flecainide, irbesartan, lamotrigine, norcitalopram, oxycodone and sulfapyridine were the most frequently occurring compounds (10 occurrences in total across winter and spring)

Adenosine, atrazine, atrazine-desethyl, carbamazepine, fexofenadine, flecainide, irbesartan, lamotrigine, norcitalopram, oxycodone and sulfapyridine were the most frequently occurring compounds in Spring (5 occurrences in total)

Atrazine, atrazine-desethyl, carbamazepine, cetirizine, citalopram, fexofenadine, flecainide, imidacloprid, irbesartan, ketamine, lamotrigine, norcitalopram, oxycodone and sulfamethoxazole were the most frequently occurring compounds in Winter (5 occurrences in total)

The majority of maximum peak area concentrations occurred at EA2 or EA6 during Spring and EA4 during Winter. All of these are downstream of WW1-3.
The lowest peak area concentrations were more variable, with the majority at EA1 and EA3 during Spring and Winter. EA1 is upstream of WW1; EA3 is upstream of WW2.
Short titleChemcatcher River Avon
StatusFinished
Effective start/end date12/10/2230/09/23