from samples that were taken after filtration. DOC was measured
using TOC analyzer (Shimadzu) after filtering the samples through
0.45 lm pore size membrane.
Apparent color was analyzed with DR 2800 photometer (Hach),
and turbidity with Model 2100P ISO turbidimeter (Hach). Conductivity
was determined using a CON6 Conductivity Meter (Ecoscan),
and pH with Multiline P3 (WTW). Absorbance of the samples at
254 nm wavelength was measured with a Lambda 45 UV/VIS spectrophotometer
(Perkin-Elmer), while the zeta potential was determined
using a Zetasizer Nano ZS (Malvern).