摘要
采用生物滴滤塔(BTF)与光催化一体化(PCO)联用工艺应用于电子垃圾拆解现场废气处理的中试研究,研究结果表明:电子垃圾拆解现场排放的废气中含有高浓度的总悬浮颗粒物(TSP)和挥发性有机污染物(VOCs)。其中TSP的质量浓度为3792.5~7387.9μg·m-3,远高于中国环境空气质量控制标准(GB3095—2012)的二级标准(300μg·m-3);VOCs主要由芳香烃类VOCs、含氮含氧类VOCs、卤代烃类VOCs和脂肪烃类VOCs组成,总VOCs的质量浓度为(5 499.1±854.7)^(26 834.0±447.0)μg·m-3,其中芳香烃类VOCs含量最高,其质量浓度为(2369.9±359.8)^(24419.6±229.5)μg·m-3,其次是含氮含氧类VOCs和卤代烃类VOCs,分别为(1018.2±142.1)^(2144.2±167.5)和(1170.6±146.5)^(1 936.6±353.3)μg·m-3,脂肪烃类VOCs的质量浓度最低,只有(44.6±0.8)^(174.4±0.5)μg·m-3。相较单一BTF和PCO工艺,BTF-PCO联用工艺可以更为有效地去除电子垃圾拆解现场排放废气中的TSP和VOCs。研究结果表明,经过BTF-PCO处理后,出口TSP的质量浓度降低到747.4~1750.9μg·m-3,其去除率在76.3%以上,而对于VOCs来说,出口浓度下降更为明显,芳香烃类VOCs、含氮含氧类VOCs、卤代烃类VOCs和脂肪烃类VOCs的去除率分别大于或者等于97.0%、92.4%、83.4%和100%。
Pilot-scale study of removal of e-waste dismantling waste gas by combined technique of biological trickling filter （BFT） and photocatalytic oxidation （PCO） were conducted in the work. Results showed that high concentrated total suspended particulate （TSP） and volatile organic compounds （VOCs） were detected from the emitted gas from e-waste dismantling process. The concentration of TSP was in the range of 3792.5 to 7387.9 μg·m-3, which was much higher than 3rd grade value of Chinese ambient air quality control criteria （500 μg·m-3）. And VOCs were mainly composed of aromatic, oxygenated and nitrogenated, halogenated and aliphatic VOCs with the concentration between 5499.1±854.7 and 26834.0±447.0 μg·m-3. Among these four kind of VOCs, aromatic VOCs account for the highest content with the concentration of 2369.9 ± 359.8 to 24419.6±229.5 μg·m-3, followed with oxygenated and nitrogenated VOCs, and halogenated VOCs with the concentrations ranged from 1018.2±142.1~2144.2±167.5 μg·m-3and 1170.6±146.5~1936.6±353.3 μg·m-3. The concentration of aliphatic VOCs was the lowest of 44.6±0.8 and 174.4±0.5 μg·m-3. Compared with single BTF and PCO, BTF-PCO combined technique displayed more effective capability in the removal of both TSP and VOCs emitted from e-waste dismantling process. It was found that the concentration of TSP greatly decreased to 747.4~1750.9 μg·m-3after BTF-PCO treatment with the removal efficiency of more than 76.3%. In the case of VOCs, the removal efficiencies are equal to or higher than 97.0%,92.4%,83.4% and 100% for aromatic, oxygenated and nitrogenated, halogenated and aliphatic VOCs, respectively.
出处
《生态环境学报》
CSCD
北大核心
2014年第5期817-823,共7页
Ecology and Environmental Sciences
基金
广东省科技计划项目(2012A032300017)
佛山市院市合作项目(2012HY100101)
国家自然科学基金项目(41373102)
广东省自然科学基金团队项目(S2012030006604)
关键词
电子垃圾
总悬浮颗粒物
挥发性有机物
生物技术
光催化氧化
中试研究
e-waste
total suspended particulate
volatile organic compounds
biotechnology
photocatalytic oxidation
pilot-scalestudy
