摘要
针对有机氟难降解,有机氟废水高COD、高毒,生化性差,纯化学处理成本高的特点,考虑通过预处理降低生物毒性,提高废水可生化性,便于后续生物工艺处理。采用电催化氧化、铁碳微电解、Fenton氧化等工艺对有机氟废水进行预处理实验研究,以脱氟性能和COD去除效果为评价指标,考察3种工艺的适宜反应条件。结果表明,电催化氧化的适宜反应条件为:pH=8,电压7V;铁碳微电解的适宜反应条件为:pH=4,液固质量比为5:1时,铁碳质量比为1:1;Fenton氧化的适宜反应条件为:pH=4,H2O2和Fe2+的投加量分别为质量分数3%、114mmol/L。在此基础上,遴选出电催化氧化与铁碳微电解耦合为最佳的处理工艺。
For the characteristics such as organic fluorine difficult to be biodegraded, high COD in organic fluorine wastewater, high toxicity, poor biodegradability and high single-chemical processing cost, reducing the toxicity above all by pretreatment was considered to improve the biodegradability of wastewater, which facilitated follow-up biological treatment. Processes ofelectro-catalytic oxidation, iron-carbonmicro-electrolysisandFentonoxidation were taken into account for the pretreatment experimental studies on organic fluorine, with defluorinating performance and COD removal efficiency as evaluation indicators, in which optimal reaction conditions were investigated. Theresultsshowedthattheoptimalreactionconditionsfortheelectrocatalytic oxidation were pH at 8 and the voltage being 7 V; the optimal reaction conditions for the iron-carbon micro-electrolysis were pH at 4, the liquidsolid mass ratio being 5：1 and the iron-carbon mass ratio being 1：1; the optimal reaction conditions for Fenton oxidation were pH at 4, mass fraction of H2O2 being 3% and Fe^2＋ dosage being 114 mmol/L. Therefore, the best combinations of electro-catalytic oxidation and iron-carbon micro-electrolysis were selected.
出处
《水处理技术》
CAS
CSCD
北大核心
2015年第2期108-112,共5页
Technology of Water Treatment
基金
国家级创新项目(3080JQ4313045)
关键词
有机氟废水
预处理
铁碳微电解
电催化氧化
FENTON氧化
organic fluorine wastewater
pretreatment
iron-carbon micro-electrolysis
electro-catalytic oxidation
Fenton oxidation
