Occurrence and multiple-level ecological risk assessment of pharmaceuticals and personal care products (PPCPs) in two shallow lakes of China

Environmental Sciences Europe

Table 1 Prioritization of target compounds based on PI values (PI > 0)

Rank	Chemical	CAS	RQ_max	F (%)	PI
Tai Lake
1	Caffeine	58-08-2	10.3	100	10.3
2	Carbamazepine	298-46-4	1.9	70	1.3
3	Ibuprofen	15,687-27-1	1.5	20	0.3
Baiyangdian Lake
1	Sulfamethoxazole	723-46-6	1128.6	100	1128.6
2	Carbamazepine epoxide	36,507-30-9	25.6	100	25.6
3	Carbamazepine	298-46-4	20.5	100	20.5
4	Diethyltoluamide	134-62-3	10.5	100	10.5
5	Triclosan	3380-34-5	1.2	10	0.12

RQ_max reference risk quotient based on the maximum measured concentration, F reference frequency of PNEC exceedance, PI reference prioritization index