TY - JOUR AU - Ninlaor , Nutchanat AU - Rattanapan , Kanokrat AU - Rattanapan , Worapot PY - 2021/12/30 Y2 - 2024/03/29 TI - Environmental Laboratory Wastewater Treatment by the Fenton Reaction JF - Journal of Vocational Education in Agriculture JA - JVEA VL - 5 IS - 2 SE - Research Article DO - UR - https://li01.tci-thaijo.org/index.php/JVIA/article/view/248383 SP - ึ79-89 AB - <p>The purpose of this research was to examine the efficiency of the Fenton method for environmental laboratory wastewater treatment.&nbsp; The initial COD, total suspended solid (TSS) and total dissolved solid (TDS) of the wastewater were 250, 3,500 and 200,000 mg/L, respectively.&nbsp; The pH was adjusted to 2.0, 3.0 and 4.0, the molar ratios of H<sub>2</sub>O<sub>2</sub>:FeSO<sub>4</sub> were 1:1, 2:1, 3:1, 4:1 and 5:1.&nbsp; The reaction times were 10, 20, 30, 40, 50 and 60 minutes.</p><p>The results showed that the molar ratio of hydrogen peroxide to ferrous sulfate&nbsp; had little effect on wastewater treatment.&nbsp; The stirring times resulted in different treatment efficacy.&nbsp; The Fenton reaction brought about the breakdown to hydroxyl radical (•OH) which was an organic oxidizing agent and this led to decreasing COD, total suspended solids and total dissolved solids.&nbsp; The wastewater at pH 4.0 had the highest efficiency in removal of total suspended solids and total dissolved solids.&nbsp; However, the water qualities after the treatment still exceeded the legal limit. The Fenton reaction was therefore only suitable for pretreatment of wastewater before further treatment.</p> ER -