摘要
线路板油墨废水颜色深,难降解有机物浓度高,一般呈碱性,处理难度大,处理成本高。本研究采用酸析-Fenton高级氧化组合工艺处理线路板油墨废水。研究首先采用酸析将部分油墨析出,探索了油墨在不同pH条件下的析出情况和有机物去除效率,试验表明pH<4时析出效果和有机物去除效率最佳;对酸析后出水通过单因素试验确定了Fenton氧化各参数,如pH、试剂量和反应时间,结果显示在pH值为3.5左右,投加50 mg/L H_(2)O_(2)及25 mg/L Fe^(2+)和反应60 min时,可去除90.33%的有机物(COD)。反应完成后投加少量聚丙烯酰胺(PAM)有利于减少絮凝体沉降时间,提高沉降效率。本研究对线路板厂油墨废水的处理和应用具有较好的指导意义。
The ink wastewater from PCB printing ink is deep in color and has high concentration of difficult-to-degrade organic matter.It is generally alkaline in nature,making it difficult to treat and with high treatment costs.The combination of acid precipitation-Fenton advanced oxidation process was used to treat the wastewater from PCB printing ink.Acid precipitation was first used to precipitate part of the ink,exploring the precipitation effect and organic matter removal efficiency of the ink under different pH conditions.The results showed that the best precipitation effect and organic matter removal efficiency occurred at pH<4.The single-factor experiment was conducted to determine the parameters of Fenton oxidation process for the acid precipitation effluent,such as pH,dosage and reaction time.The results showed that 90.33%of the organic matter(COD)can be removed when pH was around 3.5,50 mg/L H_(2)O_(2)was added,25 mg/L Fe^(2+)was added,and the reaction time was 60 min.After the reaction was complete,adding a small amount of polyacrylamide(PAM)was beneficial for reducing the sedimentation time of the flocculated particles and improving sedimentation efficiency.This study provided good guidance for the treatment and application of wastewater from PCB printing ink factories.
作者
郑垒
马贤衫
李文豪
ZHENG Lei;MA Xianshan;LI Wenhao(College of Chemistry and Material Engineering,Huizhou University,Guangdong Huizhou 516007;Guangzhou Xiaokang Technology and Development Company,Guangdong Guangzhou 510000,China)
出处
《广州化工》
CAS
2024年第23期145-147,共3页
GuangZhou Chemical Industry
关键词
线路板油墨废水
高级氧化
混凝
组合工艺
PCB wastewater
Fenton oxidation
coagulation process
combined treatment
