吸附-臭氧氧化法去除选矿药剂乙硫氮及COD的实验研究  

Experimental study on the removal of diethyldithiocarbamate and COD from mineral processing chemicals by adsorption-ozone oxidation

作　　者：沈紫飞 邓觅[2] 吴永明[1,2] 邓利智 周佳钰 李坊飞 SHEN Zi-fei;DENG Mi;WU Yong-ming;DENG Li-zhi;ZHOU Jia-yu;LI Fang-fei(Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,School of Resources&Environment,Nanchang University,Nanchang 330031,China;Institute of Microbiology,Jiangxi Academy of Sciences,Nanchang 330096,China;College of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌大学资源与环境学院鄱阳湖环境与资源利用教育部重点实验室,江西南昌330031 [2]江西省科学院微生物研究所,江西南昌330096 [3]南昌航空大学环境与化学工程学院,江西南昌330063

出　　处：《应用化工》2023年第2期420-425,共6页Applied Chemical Industry

基　　金：江西省重点研发计划项目(20202BBGL73082);江西省科技创新基地计划(20212BCD42014);江西省科学院省级科技计划项目包干制度点示范项目(2021YSBG10003,2021YSBG22024)。

摘　　要：采用臭氧氧化、活性炭吸附、吸附-臭氧氧化法处理乙硫氮模拟废水,结果表明,(1)对于乙硫氮和对应COD的去除,臭氧的投加量(低于3.00 g/h)与之成正相关关系,活性炭的粒径则与之相反(当≥60目时的去除率可达到70.1%和70.8%,较≤20目对应的去除率高出40.2%和41.5%),同时pH值则表现出影响不明显的效果;(2)乙硫氮在初始浓度为400 mg/L,初始pH为7.8,臭氧、活性炭投加量分别为3.00 g/h、1.50 g/L,反应50 min时,吸附-臭氧氧化法对乙硫氮和COD的去除率分别为99.8%,80.7%,较单独活性炭处理提升29.7%,9.9%,其中COD去除率较单独臭氧处理提升31.2%;(3)整体上,对乙硫氮的去除效果表现为吸附-臭氧氧化>臭氧氧化>活性炭吸附,同时COD去除效果表现为吸附-臭氧氧化>活性炭吸附>臭氧氧化。由此可见,吸附-臭氧氧化法可实现对乙硫氮及COD的有效同步去除。Ozone oxidation,activated carbon adsorption,and adsorption-ozone oxidation were used to treat diethyldithiocarbamate simulated wastewater.The results showed that for the removal of diethyldithiocarbamate and the corresponding COD,the ozone dosing(below 3.00 g/h)was positively correlated with it,while the particle size of activated carbon was the opposite(the removal rate could reach 70.1%and 70.8%when≥60 mesh,which were 40.2%and 41.5%higher than those corresponding to≤20 mesh),while the pH value showed an insignificant effect.The initial concentration of diethyldithiocarbamate was 400 mg/L,the initial pH was 7.8,the ozone and activated carbon dosages were 3.00 g/h and 1.50 g/L,respectively,and the removal rate of diethyldithiocarbamate and COD by the adsorption-ozone oxidation method were 99.8%and 80.7%,respectively,when the reaction was carried out for 50 min,29.7%and 9.9%higher than that of activated carbon treatment alone,of which COD removal rate was 31.2%higher than that of ozone treatment alone;overall,the removal effect of diethyldithiocarbamate showed adsorption-ozone oxidation>ozone oxidation>activated carbon adsorption,while the removal effect of COD showed adsorption-ozone oxidation>activated carbon adsorption>ozone oxidation.It can be seen that the adsorption-ozone oxidation method can achieve the effective simultaneous removal of diethyldithiocarbamate and COD.

关 键 词：臭氧氧化 活性炭吸附 吸附-臭氧氧化 乙硫氮 COD 

分 类 号：TQ9[化学工程]