The trend of sustainable use of available water resources encourages textile finishing enterprises to implement efficient wastewater treatment technologies that enable water recycling, and not just itćs discharging into the local wastewater treatment plants (WWTP). This paper presents the results obtained from the H2O2/UV treatment of wastewater from Slovene textile finishing company. Laboratory scale decolouration experiments were performed on the most representative wastewater samples, collected in three months period. In general 80 % decolouration and 86 % total organic carbon (TOC) reduction was achieved. On the other hand, the use of ultraviolet (UV) radiation to degrade and destroy organic pollutants in textile wastewater could lead to the formation of toxic dioxins and dioxin-like compounds, groups of persistent organic pollutants, especially due to the presence of halogenated compounds in textile finishing processes. For these reasons, textile wastewater samples were analysed for any content of dioxins before and after the treatment with H2O2/UV.
COBISS.SI-ID: 16353302
The UV/H2O2 process has often been proposed as an effective treatment technology for remediation of colored wastewaters. However, it has frequently been noted that it is not as economically efficient as other treatment technologies. To limit this drawback as much as possible, an effort to optimize the treatment technology from both the economical and operating points of view is needed. This paper presents a study on determination of cost optimal operating conditions for decoloration and mineralization of C. I.Reactive Blue 268 by the UV/H2O2 process. Dye concentration, hydrogen peroxide concentration, pH, treatment time, and temperature were considered tobe influential operating parameters. Cost of electricity, cost of hydrogen peroxide, and cost of water needed to adjust the dye concentration were considered to be relevant operating costs. The presented approach is based onresponse surface methodology in conjunction with mathematical programming. The results obtained clearly indicate that, in order to assure effective and economically efficient operation, the UV/H2O2 process should be simultaneouslyoptimized from the perspective of both operational and economic efficiency.
COBISS.SI-ID: 13047574
Cyclodextrins (CDs) can form inclusion complexes with a wide variety of molecules making them very attractive in different areas, such as pharmaceutics, biochemistry, food chemistry and textile. In this communicationwe will report on the physico-chemical characterization of cellulose modified with CDs by means of infra-red spectroscopy (FTIR), cross polarization magic angle spinning solid state nuclear magnetic resonance (CP-MAS NMR), polarized optical microscopy (POM) and thermal gravimetric analysis (TGA). Both CP-MAS NMR and FTIR indicate that CDs are chemically attached to cellulose backbone through the formation of ester bonds. Furthermore, the CD-grafted cellulose was dissolved in a "superphosphoric" acid solution but, despite the increase of hydrophilicity due to the modification, POM reveled that cellulose was less soluble when compared to the unmodified polymer. The formation of a complex CD-cellulose network is suggested.
COBISS.SI-ID: 16248598
The purpose of our research was to prepare nanoencapsulated PET textile materials, which would be used as odor carriers (underwear and bed sheets with aromatherapy activities) or would act as malodorous absorbers (absorption of cigarette smell). We grafted -cyclodextrin onto PET textile materials by using a polyfunctional reagent 1,2,3,4-butanetetracarboxylic acid. To reduce the curing temperature of the reaction, catalysts such as sodium hypophosphite and cyanamide were used. We prepared nanoencapsulated polyester textile materials with increased adsorption capacity and with delayed release of volatile or active compounds.
COBISS.SI-ID: 13229078