含溴水臭氧化过程阴离子对溴酸盐生成的影响

发布时间：2019-02-26 20:26

【摘要】：为研究常见无机阴离子对含溴水臭氧化过程溴酸盐(Br O-3)生成的影响,本研究通过小试分别考察了不同质量浓度氯离子(Cl-)、碳酸氢根离子(HCO-3)和硫酸根离子(SO2-4)对Br O-3生成的影响,并结合反应过程臭氧衰减、中间产物次溴酸/次溴酸根离子(HOBr/OBr-)生成及总溴浓度变化情况,进一步分析了这3种无机阴离子对Br O-3生成的影响机制.结果表明,以60 min为例,Cl-质量浓度为3~150 mg·L-1的水样Br O-3生成量相对于未投加Cl-条件降低了8.8%~25.7%;反应20min时,SO2-4质量浓度从0 mg·L-1增至30 mg·L-1时,Br O-3生成量减少了63.9%;而当HCO-3质量浓度由0 mg·L-1上升至30 mg·L-1时,Br O-3生成量增加了6.4倍,其质量浓度超过30 mg·L-1,继续投加HCO-3对Br O-3生成量的促进作用提高不大.研究表明,在相同的臭氧投加量和相同的反应时间下,投加Cl-和SO2-4均能抑制臭氧化过程Br O-3的生成,而投加HCO-3能极大地促进Br O-3的生成.
[Abstract]:In order to study the effect of common inorganic anions on the formation of brominate (Br O _ (3) during the ozonation of bromine water, different concentrations of chloride ion (Cl-) were investigated in this study. The effects of bicarbonate ion (HCO-3) and sulfate ion (SO2-4) on the formation of Br O _ 3, combined with the degradation of ozone in the reaction process, the formation of secondary bromate / secondary bromate ion (HOBr/OBr-) and the change of total bromine concentration, The mechanism of the effect of these three inorganic anions on the formation of Br O _ (3) was further analyzed. The results showed that, taking 60 min as an example, the amount of Br O _ (3) production in water samples with Cl- concentration of 3 渭 150 mg 路L ~ (- 1) decreased by 8.8% and 25.7% compared with that without adding Cl-. When the mass concentration of SO2-4 was increased from 0 mg 路L-1 to 30 mg 路L-1, the production of Br O _ 3 decreased by 63.9% when 20min was reacted. When the mass concentration of HCO-3 increased from 0 mg 路L-1 to 30 mg 路L-1, the production of Br O _ (3) increased 6.4 times, and its mass concentration exceeded 30 mg 路L ~ (- 1). The increasing effect of HCO-3 on the production of Br O ~ (3) was not obvious. The results show that under the same ozone dosage and the same reaction time, both Cl- and SO2-4 can inhibit the formation of Br O _ 3 in the ozonation process, and the addition of HCO-3 can greatly promote the production of Br O _ 3.
【作者单位】：华南理工大学环境与能源学院;汕头职业技术学院;工业聚集区污染控制与生态修复教育部重点实验室;
【基金】：国家自然科学基金项目(51078148,41173103) 国家水体污染控制与治理科技重大专项(2009ZX07423-003)
【分类号】：TU991.2

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