in the present study, advanced oxidation treatment, uv/ was applied to decolourisation of acid orange 8 (ao8). the uv radiation was carried out with a 15 w low-pressure mercury lamp. kinetic model for the decolourisation of the dye was developed based on experimental results and known chemical and photochemical reactions. the observed kinetic reaction constant was determined and correlated as a...

This study is focused on removing toxic aniline from aqueous solutions using advanced oxidation process by UV/ peroxy disulfate. In this study, the effect of various parameters including pH (3-9), the level of radiation (ultraviolet 30 watt lamp, number 2-5), peroxy disulfate dose (0.02 – 0.08 mol/l) and the initial concentration (20 – 100 mg/l) at different contact times (10 – 60 min) on the e...

Background: Mature landfill leachate is a complicated mixture which is resistant to biological treatment processes. The treatment of mature landfill leachate by struvite precipitation and Fenton oxidation was the main objective of the current research. Methods: Struvite with the phosphate/ammonia/magnesium molar ratio of 1/1/1.05 was considered during all experiments. Five initial pHs of 3, 4,...

Phenolic acids constitute a major group of pollutants which are recalcitrant to common biological treatment. In this study synthetic wastewater containing a mixture of p-coumaric and p-hydroxybenzoic acids was evaluated for photo-Fenton pretreatment. The changes in biodegradability (ratio of biochemical oxygen demand to total organic carbon (TOC)) and mineralization (TOC removal) were monitored...

Since the conventional processes employed in most wastewater treatment plants (WWTPs) worldwide are not designed to entirely remove or oxidize emerging pollutants, which, due their incidence and persistence, can cause damage both environment human health, several options for degradation removal have emerged. Coupling advanced Fenton oxidation process as a polishing tertiary alternative within W...

Industri tekstil dalam proses manufakturnya, membutuhkan air jumlah yang sangat banyak dimana kurang lebih 70% dari tersebut akan berubah menjadi limbah. Limbah cair industri diketahui mengandung senyawa warna sulit terdegradasi sehingga dapat menyebabkan permasalahan nilai estetika di badan penerima, membahayakan keanekaragaman hayati dan bahan toksik karsinogenik mengganggu kesehatan manusia ...