Abstract：Various methods were used to analyze the waste water of reverse osmosis (RO) concentrates which was from printing and dyeing wastewater treatment plant in Jiangsu province, China. With IC and ICP-MS, qualitative and quantitative analysis were carried out in inorganic ions, and qualitative and quantitative analysis of semi-volatile organic compounds by GC-MS. The results show that Na+, Cl- and SO42- in RO concentrated water were major ions, and DEHP was the major component of semi-volatile organic compounds which concentration was 1.452mg/L. In order to analyze the DOM characteristics, RO concentrate was fractionated with different MW by means of ultrafiltration and with different hydrophilic and hydrophobic properties by XAD-8 and XAD-4 resin. The fractions were characterized by dissolved organic carbon (DOC), UV254, specific ultraviolet absorption (SUVA) and three dimensional excitation emission matrix fluorescence spectroscopy (3DEEM). The results showed that the fraction of molecular weight less than 1k had the largest proportion of 56.98%, while the fraction of molecular weight of 5~10k had high degree of aromatic structures although it only occupied 2.9%. The DOC in HPI*, HPO* and TPI* of RO concentrated water was almost similar. 3 DEEM displayed that HPO* had the highest degree of aromatic structure and contained more tryptophan aromatic protein, while HPI* contains more soluble microbial products.
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