Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

Table 5

Activity concentrations of total uranium and their uncertainty, as well as 𝐾_𝑑 coefficient, in water (U_w) and in suspended matter (U_sm), at San Marcos River. Samples were collected in 2007.

Sample	Uw (mBq/L)	Usm (kBq/kg)	Kd (L/kg)	Comments
SW1	10±0.4	1.3±0.1	1.3×10^5	Before Victorino
SW2	239±18	0.32±0.003	1.3×10^3	After Victorino
SW3	220±23	0.21±0.02	9.6×10^2
SW4	15±0.5	0.66±0.06	4.4×10^4
SW5	189±15	0.20±0.02	1.1×10^3	Confluence
SW6	110±1	n.d.*	—
SW7	6±0.4	0.03±0.002	5.0×10^3
SW8	12±0.4	0.17±0.01	1.4×10^4
SW9	61±7	0.022±0.002	3.6×10^2	Before San Marcos I
SW10	74±14	n.d.	—	After San Marcos I

*n.d. means below detection limit.