Work

Contribution of H2O2 in ultrasonic systems for degradation of DR–81 dye from aqueous solutions

Year: 2018

Type: article

Abstract: In this study, the degradation of Direct Red 81 (DR-81) dye in the aqueous phase by ultrasonic/H 2 O 2 (US-H 2 O 2 (system was investigated. The effect of operational condition such as pH, the concentration of H 2 O 2 , initial dye concentration, ultrasonic time, and temperature on the degradation of DR-81 was studied. Additionally, the effect of the addition of salts on the degradation of DR-81 was investigated. It was found that degradation of DR-81 was significantly pH-dependent. The degradation of DR-81 increased with the increase in the H 2 O 2 concentration, ultrasonic time, and temperature. The degradation of DR-81 decreased with the increase in the concentration of DR-81. Addition of salts increased the degradation of DR-81. DR-81 degradation followed pseudo-first-order kinetics under controlled conditions. The maximal TOC removal efficiency was 57.3% with 0.225 mM of H 2 O 2 and 0.045 mM of dye. Maximum %RSE obtained for US-H 2 O 2 system was 2.8%. The results showed that US-H 2 O 2 system sustain ably accelerated the degradation of DR-81 in aqueous solutions.

Source: Desalination and Water Treatment

DOI: 10.5004/dwt.2018.22162

Authors: Mansooreh Dehghani, Yousof Kamali, Fatemeh Jamshidi, Marziyeh Ansari Shiri, Majid Nozari

Institution: Shiraz University of Medical Sciences

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $1,000