沸石动态吸附污水中氨氮的影响因素研究
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摘要
采用动态吸附装置,分别考察水力停留时间(HRT)、进水水质和温度三个因素对优选沸石吸附性能的影响。实验结果表明:HRT的延长能够提高沸石吸附氨氮的能力,净化进水水质和提高温度有利于沸石吸附氨氮。与模拟废水相比,在HRT相同的条件下,汽提净化水水质会降低沸石吸附容量;预处理净化水质可以提高沸石吸附量;温度升高可以提高沸石的吸附能力。因此,汽提净化水沸石脱氨氮之前需要进行预处理净化水质,不需要降温,沸石吸附设计容量为10 mg/g。
A dynamic adsorption process is simulated, and the effects on the adsorption performance of the zeolite are investigated from three aspects: hydraulic retention time(HRT), influent water quality and temperature. The results show that the extension of HRT can improve the ability of zeolite to adsorb ammonia nitrogen. Purifying the influent water quality and higher temperature is beneficial to the adsorption of ammonia nitrogen by zeolite. Compared with the simulated wastewater, under the same HRT conditions, the stripping purified water quality will reduce the zeolite adsorption capacity; the pretreatment purification water can increase the zeolite adsorption capacity. The increase in temperature can enhance the adsorption capacity of the zeolite. So it is not required for cooling when the stripping purified water outflows from the device. Therefore, it is necessary to carry out pretreatment before the ammonia nitrogen removes from stripping purified water by zeolite adsorption, and without requiring a temperature drop when the stripping purified water outflows from the device, and the zeolite adsorption capacity is 10 mg/g.
A dynamic adsorption process is simulated, and the effects on the adsorption performance of the zeolite are investigated from three aspects: hydraulic retention time(HRT), influent water quality and temperature. The results show that the extension of HRT can improve the ability of zeolite to adsorb ammonia nitrogen. Purifying the influent water quality and higher temperature is beneficial to the adsorption of ammonia nitrogen by zeolite. Compared with the simulated wastewater, under the same HRT conditions, the stripping purified water quality will reduce the zeolite adsorption capacity; the pretreatment purification water can increase the zeolite adsorption capacity. The increase in temperature can enhance the adsorption capacity of the zeolite. So it is not required for cooling when the stripping purified water outflows from the device. Therefore, it is necessary to carry out pretreatment before the ammonia nitrogen removes from stripping purified water by zeolite adsorption, and without requiring a temperature drop when the stripping purified water outflows from the device, and the zeolite adsorption capacity is 10 mg/g.
引文
[1] KANG S,CHUN J,PARK N,et al.Hydrophobic zeolites coated with microporous organic polymers:adsorption behavior ofammonia under humid conditions[J].Chemical Communications,2015(59):11814-11817.
[2] 张佳,张倩,赵可玉,等.天然沸石对氨氮的动态去除过程研究[J].环境工程,2014(11):64-68.
[3] 靳薛凯,冯素敏,邵立荣,等.天然片沸石对废水中氨氮的吸附机理研究[J].河北科技大学学报,2018(1):56-64.
[4] 杨炳飞,林海,董颖博,等.复合改性沸石颗粒氨氮吸附过程及特征[J].过程工程学报,2017(1):103-109.
[5] NUERNBERG G B,MOREIRA M A,ERNANI P R,et al.Efficiency of basalt zeolite and Cuban zeolite to adsorb ammonia releasedfrom poultry litter[J].Journal of environmental management,2016,183:667-672.
[6] ANIS S F,KHALIL A,SINGARAVEL G,et al.A review on the fabrication of zeolite and mesoporous inorganic nanofibers formation for catalytic applications[J].Microporous and Mesoporous Materials,2016,236:176-192.
[7] 张璐,杨忆新,罗明生,等.天然沸石去除煤化工废水中氨氮的研究[J].工业水处理,2018(7):46-49.
[8] DAS P,PRASAD B,SINGH K K K.Applicability of zeolite based systems for ammonia removal and recovery from wastewater[J].Water Environment Research,2017(9):840-845.
[9] DESSALEGNE M,ZEWGE F,DIAZ I.Aluminum hydroxide supported on zeolites for fluoride removal from drinking water[J].Journal of Chemical Technology & Biotechnology,2017(3):605-613.
[2] 张佳,张倩,赵可玉,等.天然沸石对氨氮的动态去除过程研究[J].环境工程,2014(11):64-68.
[3] 靳薛凯,冯素敏,邵立荣,等.天然片沸石对废水中氨氮的吸附机理研究[J].河北科技大学学报,2018(1):56-64.
[4] 杨炳飞,林海,董颖博,等.复合改性沸石颗粒氨氮吸附过程及特征[J].过程工程学报,2017(1):103-109.
[5] NUERNBERG G B,MOREIRA M A,ERNANI P R,et al.Efficiency of basalt zeolite and Cuban zeolite to adsorb ammonia releasedfrom poultry litter[J].Journal of environmental management,2016,183:667-672.
[6] ANIS S F,KHALIL A,SINGARAVEL G,et al.A review on the fabrication of zeolite and mesoporous inorganic nanofibers formation for catalytic applications[J].Microporous and Mesoporous Materials,2016,236:176-192.
[7] 张璐,杨忆新,罗明生,等.天然沸石去除煤化工废水中氨氮的研究[J].工业水处理,2018(7):46-49.
[8] DAS P,PRASAD B,SINGH K K K.Applicability of zeolite based systems for ammonia removal and recovery from wastewater[J].Water Environment Research,2017(9):840-845.
[9] DESSALEGNE M,ZEWGE F,DIAZ I.Aluminum hydroxide supported on zeolites for fluoride removal from drinking water[J].Journal of Chemical Technology & Biotechnology,2017(3):605-613.