Arsenic Transfer from As-Rich Sediments to River Water in the Presence of Biofilms

Table 1

Characteristics of the Anllóns river water and sediment.

River water
pH (25°C)	EC (25°C) (µS cm^−1)	Alkalinity (mg L^−1)	TC (mg L^−1)	IC (mg L^−1)	DOC (mg L^−1)	N (mg L^−1)	-N (mg L^−1)
7.45	145	27	7.76	5.71	2.05	2.28	1.87
-N (mg L^−1)	P (µg L^−1)	(mg L^−1)	(mg L^−1)	F^− (mg L^−1)	Cl^− (mg L^−1)	Br^− (mg L^−1)	Na (mg L^−1)
0.02	22.82	<0.04	8.63	<0.05	17.20	0.07	13.60
K (mg L^−1)	Ca (mg L^−1)	Mg (mg L^−1)	Al (µg L^−1)	Fe (µg L^−1)	Mn (µg L^−1)	As (µg L^−1)
1.12	6.90	4.20	14.70	7.16	0.04	0.98
Sediment
C (%)	N (%)	C/N	S (%)	Mg (%)	Ca (%)	K (%)	Fe (%)
1.57	0.13	12	0.03	0.70	1.20	2.10	3.90
Ti (%)	Mn (ppm)	Cr (ppm)	As (ppm)	Zn (ppm)	Ni (ppm)	Cu (ppm)
1.00	892	138	106	69	40	27