氯化钠对芬顿体系降解印染废水的影响

Effects of sodium chloride on degradation of printing and dyeing wastewater by the Fenton oxidation

氯化钠是印染过程中常见的无机盐促染剂,在印染废水中会普遍存在。以罗丹明B为污染物,研究了氯化钠对其芬顿降解效果的影响。结果表明,氯化钠的存在会明显抑制罗丹明B的降解反应速率;在温度为30℃、NaCl浓度为1000 mg/L、罗丹明B浓度为47.9 mg/L、pH=5、Fe^(2+)浓度为0.6 mmol/L和H_(2)O_(2)浓度为6.42 mmol/L的条件下,罗丹明B的去除率可达98.4%,反应平衡时间为20 min。

Sodium chloride is a common accelerant of dyestuffs.Effects of sodium chloride on the degradation of Rhodamine B in printing and dyeing wastewater by the Fenton oxidation method were investigated.The results showed that the sodium chloride could obviously inhibit the degradation rate of Rhodamine B(RhB).Under conditions of temperature of 30℃,NaCl concentration of 1000 mg/L,RhB concentration of 47.9 mg/L,Fe^(2+)concentration of 0.6 mmol/L,pH=5 and H_(2)O_(2)dosage of 6.42 mmol/L,the RhB removal efficiency could be obtained to 98.4%in 20 min.