. 2016 Feb 8;6:20377. doi: 10.1038/srep20377

Table 1. Summary of physicochemical properties of natural dissolved organic carbon (DOC) samples isolated by reverse osmosis from different freshwater systems.

DOC source	Coordinates	Type	SAC (cm² mg⁻¹)^b	Abs_254/365^c	FI^d	Binding ligand capacities (L_T, μmol mg⁻¹)^e
DOC source	Coordinates	Type	SAC (cm² mg⁻¹)^b	Abs_254/365^c	FI^d	Acid	Intermediate	Basic	PBI
Dechlorinated Hamilton tap water (DC)^a	—	Tap water isolate	3.72	15.72	1.75	2.56	0.36	2.86	0.13
Lake Ontario (LO) ^a	43°29’N 79°79’W	Autochthonous	4.85	9.75	2.54	1.32	0.50	3.75	0.20
Bannister Lake (BL) ^a	43°30’N 80°83’W	Autochthonous	14.16	6.31	1.51	4.26	0.89	1.79	0.30
Preston Effluent (PE) ^a	43°39’N 80°35’W	Sewage-derived	14.77	5.40	1.94	2.67	0.38	4.08	0.11
Nordic Reservoir (NR) ^a	—	Terrigenous	28.76	4.50	1.21	1.58	0.31	0.79	0.26
Luther Marsh (LM) ^a	43°37’N 80°26’W	Terrigenous	39.30	3.72	1.19	1.74	0.70	1.45	0.44
Aldrich humic acid (AHA) ^a	—	Coal-derived	79.98	2.53	0.83	1.89	0.49	1.17	0.32
Novo Airão (NA)	2°37’S 60°56’W	Terrigenous	59.00	2.90	1.42	1.01	0.73	2.89	0.38
São Gabriel da Cachoeira (SGC)	0°07’S 67°05’W	Terrigenous	73.00	2.91	1.31	1.21	0.80	1.54	0.58

^aData from Al-Reasi et al. (2013)⁸.

^bSAC₃₄₀ is the specific absorbance coefficient at 340 nm normalized to DOC.

^cAbs_254/365 is the ratio of absorbance at 254 nm to that at 365 nm.

^dFI is the fluorescence index.

^eLT is the binding site densities of DOC molecules. See text for description of each quality parameter.