臭氧-活性炭处理高浓度制药废水作用机制研究  

Mechanism of Ozone-Activated Carbon Treatment of High Concentration Pharmaceutical Wastewater

作　　者：刘冰 郑煜铭[2] 陈燕敏[1] 卢鑫 古励 LIU Bing;ZHENG Yuming;CHEN Yanmin;LU Xin;GU Li(School of Chemistry and Chemical Engineering,Zhengzhou Normal University,Zhengzhou 450044,China;Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;College of Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]郑州师范学院化学化工学院,河南郑州450044 [2]中国科学院城市环境研究所,福建厦门361021 [3]重庆大学城市建设与环境工程学院,重庆400044

出　　处：《环境科学与技术》2021年第2期122-130,共9页Environmental Science & Technology

基　　金：国家自然科学基金项目(51208448);河南省高等学校青年骨干教师资助计划项目(2015GGJS-136);河南省科技厅科技攻关项目(162102310498);河南省教育厅科学技术研究重点项目(14A610004)。

摘　　要：该研究采用臭氧(O_(3))-颗粒活性炭(GAC)处理高浓度制药废水,研究结果表明:(1)投加适量的GAC能提高O_(3)对高浓度有机物的去除能力,当O_(3)气体流速为120 L/h和GAC剂量30 g时,COD去除率可达到92%;(2)GAC可以提高O_(3)利用率,当O_(3)气体流量为60 L/h和GAC剂量30 g时,O_(3)利用率为50%,相比于单独O_(3)氧化时分别提高了30%;(3)pH值对O_(3)/GAC体系有机物去除和协同因子都有重要影响。在酸性条件下,COD的去除主要靠GAC的吸附和O_(3)氧化作用;在碱性条件下,靠GAC吸附和羟基自由基(HO·)氧化作用去除。协同因子在酸、碱性条件下分别为1.0、1.4;(4)在酸性和碱性条件下,GAC表面峰强度变化分别与GAC吸附有机物、GAC表面官能团的增多相关。废水经过O_(3)氧化后,原有的多环类化合物的浓度降低,但苯系衍生物和简单有机酸等浓度等却增加,还生成了简单的酚类物质;经过O_(3)/GAC体系作用后多环化合物的浓度水平显著下降;(5)O_(3)/GAC体系动态实验中,GAC吸附15 min即出现泄漏,进行到50 min出水水质与进水水质相同;运行到100 min时开始通入O_(3),O_(3)/GAC体系共运行约250 min,运行期间保持对COD的良好去除效果,极大地延长了活性炭的使用周期。Coupling ozone and granular activated carbon(GAC)was used to treat high concentration pharmaceutical wastewater.The results showed that GAC enhanced the effect of O_(3) on the COD removal.At the O_(3) gas flow rate of 120 L/h and the GAC dose of 30 g,the rate of COD removal reached 92%.The rate of O_(3) utilization was improved by GAC.At the O_(3) gas flow rate of 60 L/h and the GAC dose of 30 g,the rate of O_(3) utilization was about 50%,increased by 30% compared with O_(3) used alone.p H had important influence on organic matter removal in O_(3)/GAC process and enhanced factors.Under acidic conditions,the rate of COD removal mainly depended on the adsorption of GAC and the ozonation.Higher rate of CODcr removal was obtained by GAC adsorption and hydroxyl radical(HO·)oxidation under alkaline conditions.In acid and alkaline conditions,the enhanced factors were 1.0 and 1.4,respectively.The change of peak intensity of GAC surface was related with the increase in organic matter adsorbed GAC surface under the acid conditions,and surface functional groups of GAC in alkaline conditions.After ozonation,the concentration of the polycyclic compounds decreased,and the concentrations of benzene derivatives and simple organic acids increased.Meanwhile,some simple phenolic compounds were formed.After the O_(3)/GAC process,the concentration of polycyclic compounds was significantly decreased.The concentration of the influence leaked by adsorbed for 15 minutes,and was the same as that of effluent after 50 minutes.Then O_(3) was used after 100 minutes,and the O_(3)/GAC system ran for about 250 minutes.A good COD removal was obtained,and greatly extended the life cycle of activated carbon.

关 键 词：高浓度制药废水 臭氧氧化 活性炭 傅里叶红外光谱 X-射线光电子能谱 

分 类 号：X703[环境科学与工程—环境工程]