STUDY ON HIGH CONCENTRATION PESTICIDE WASTEWATER TREATMENT BY FENTON AND NANO-TIO2/UV PHOTOCATALYSIS OXIDATION
XU Hui
PENG Dan-li
ZHENG Zhi-li
WANG Si-jing
XIE Qi-wen
GUO Wen-hui
JIANG Zhi-guang
Abstract：Hunan Haili comprehensive pesticide wastewater was pretreated by Fenton oxidation and nano-TiO2/UV photocatalysis oxidation. The influences of pH, nano-TiO2 dosage, Fenton dosage (ratio), and some auxiliary catalytic measures were investigated to determine the optimal process parameters. The results showed that the optimum conditions for Fenton oxidation were pH=3.0, Fe2+dosage=0.8 g/L, H2O2 dosage=0.89 g/L, reaction time=2.0 h, Ca (OH) 2 dosage =12.5 g/L. The optimum conditions for nano-TiO2/UV photocatalysis oxidation were pH =6.0, nano-TiO2 dosage =3.0 g/L, reaction time =2.0 h, PAM dosage =12.0 mg/L, Ca (OH) 2 dosage =7.5 g/L. Under the optimum conditions, the removals of COD, total phosphorus, total nitrogen, ammonia nitrogen were 61.54 ％, 52.74 ％, 48.76 ％ and 57.49 ％, respectively. The COD concentration decreased from 65 900 mg/L to 25 342 mg/L. The B/C ratio increased from 0.28 to 0.46.
Keywords：Fenton oxidationphotocatalysis oxidationpesticide wastewaternano TiO2
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 34-39 )