缓释氧剂的制备及其在黑臭水体治理方面的应用研究
|
摘要
采用聚乙烯醇(PVA)为包埋剂,制备了以火山渣为填充剂、过氧化钙(CaO_2)为氧源的缓释氧剂,旨在为黑臭水体治理提供一种高效可行的方式。通过清水实验和黑臭水体实验,研究了缓释氧剂的释氧性能及其在污染物去除方面的作用。结果表明,相较粉末状过氧化钙,缓释氧剂的释氧得到有效控制,且对pH的影响相对减弱。在2 L的黑臭水体中投加6.08 g缓释氧剂后,DO峰值达5.16 mg/L,且19 d内仍维持在2 mg/L以上,COD由145.99 mg/L降至28.6 mg/L,总磷去除率达95%以上。表明缓释氧剂能显著改善黑臭水体上覆水的溶氧状态,且对COD和总磷的去除有积极的促进作用。
A slow oxygen-releasing agent is prepared by using polyvinyl alcohol(PVA)as an embedding agent,scoria as a filling agent and Ca O_2as an oxygen source,aiming at providing an efficient and feasible way to treat black and odorous water.The oxygen-releasing performance of slow oxygen-releasing agent and its role in the removal of pollutants are evaluated through experiments on clear water and black odorous water,respectively.It is indicated that the oxygen release rate of slow oxygen-releasing agent is controlled effectively compared with powdered calcium peroxide,and the effect on p H value weakens relatively.After adding 6.08 g of slow oxygen-release agent into 2 L of black odorous water,the highest concentration of dissolved oxygen reaches 5.16 mg·L~(-1)and maintains above 2 mg·L~(-1)in 19 days,the concentration of COD decreases from 145.99 mg·L~(-1)to 28.6 mg·L~(-1)and the maximum removal rate of total phosphorus exceeds 95%.It indicates that this slow oxygen-releasing agent can significantly improve the dissolved oxygen state of the overlying water in the black odorous water and promote the removals of COD and total phosphorus.
A slow oxygen-releasing agent is prepared by using polyvinyl alcohol(PVA)as an embedding agent,scoria as a filling agent and Ca O_2as an oxygen source,aiming at providing an efficient and feasible way to treat black and odorous water.The oxygen-releasing performance of slow oxygen-releasing agent and its role in the removal of pollutants are evaluated through experiments on clear water and black odorous water,respectively.It is indicated that the oxygen release rate of slow oxygen-releasing agent is controlled effectively compared with powdered calcium peroxide,and the effect on p H value weakens relatively.After adding 6.08 g of slow oxygen-release agent into 2 L of black odorous water,the highest concentration of dissolved oxygen reaches 5.16 mg·L~(-1)and maintains above 2 mg·L~(-1)in 19 days,the concentration of COD decreases from 145.99 mg·L~(-1)to 28.6 mg·L~(-1)and the maximum removal rate of total phosphorus exceeds 95%.It indicates that this slow oxygen-releasing agent can significantly improve the dissolved oxygen state of the overlying water in the black odorous water and promote the removals of COD and total phosphorus.
引文
[1]Jih Ming Chyan,Yu Xian Jhu,I Ming Chen,et al.Improvement of nitrogen removal by external aeration and intermittent circulation in a subsurface flow constructed wetland of landscape garden ponds[J].Process Safety and Environmental Protection,2016,104(Part B):587-597.
[2]Wang Hefei,Zhao Yongsheng,Li Tianyi,et al.Properties of calcium peroxide for release of hydrogen peroxide and oxygen:A kinetics study[J].Chemical Engineering Journal,2016,303:450-457.
[3]Romero A,Santos A,Vicente F.In situ oxidation remediation technologies:Kinetic of hydrogen peroxide decomposition on soil organic matter[J].Journal of Hazardous Materials,2009,170(2-3):627-632.
[4]Koenigsberg S S,Sandefur C A.The use of oxygen release compound for the accelerated bioremediation of aerobically degradable contaminants:The advent of time-release electron acceptors[J].Remediation Journal,2008,10(1):3-29.
[5]张启超,杨鑫,孙淑雲,等.过氧化钙在处理厌氧底泥中的应用初探[J].湖泊科学,2015,(6):1087-1092.
[6]王熙,孙飞云,董文艺.用过氧化钙控制城市河道底泥嗅味物质及氮磷释放试验研究[J].水利水电技术,2012,43(8):66-69.
[7]Lu Shuguang,Zhang Xiang,Xue Yunfei.Application of calcium peroxide in water and soil treatment:A review[J]. Journal of Hazardous Materials,2017,337:163-177.
[8]谢李,刘菲,刘玉龙.释氧渗透反应格栅填料的改进研究[J].环境科学与技术,2010,(2):44-48.
[9]Chung-Seop Lee,Thao Le Thanh,Eun-Ju Kim,et al.Fabrication of novel oxygen-releasing alginate beads as an efficient oxygen carrier for the enhancement of aerobic bioremediation of 1,4-dioxane contaminated groundwater[J].Bioresource Technology,2014,171:59-65.
[10]Wu Chih-Hung,Chang Shih-Hsien,Lin Chi-Wen. Improvement of oxygen release from calcium peroxide-polyvinyl alcohol beads by adding low-cost bamboo biochar and its application in bioremediation[J].Clean-Soil Air Water,2015,43(2):287-295.
[11]Zhang F,Wu J,Kang D.Development of a complex hydrogel of hyaluronan and PVA embedded with silver nanoparticles and its facile studies on Escherichia coli[J]. Journal of Biomaterials Science,Polymer Edition,2013,24(12):1410-1425.
[12]Zhang L,Shen Q,Hu H.Impacts of Corbicula fluminea on oxygen uptake and nutrient fluxes across the sediment water interface[J].Water,Air,&Soil Pollution,2011,220(1-4):399-411.
[13]Matzinger A,Muller B,Niederhauser P,et al.Hypolimnetic oxygen consumption by sediment-based reduced substances in former eutrophic lakes[J]. Limnology and Oceanography,2010,55(5):2073-2084.
[14]刘涉江,姜斌,李鑫钢,等.过氧化钙释氧过程中碱度调控方法的研究[J].中国给水排水,2009,(11):79-82.
[15]Rongrong L,Xujie L,Qing T.The performance evaluation of hybrid anaerobic baffled reactor for treatment of PVA-containing desizing wastewater[J].Desalination,2011,271(1):287-294.
[16]Madsen Hel,Christensson F,Polyak Le,et al. Calcium phosphate crystallization under terrestrial and microgravity conditions[J].Journal of Crystal Growth,1995,152:191-202.
[17]王英秀.缓释氧材料制备与抑制底泥磷释放研究[D].上海:华东理工大学,2012.
[2]Wang Hefei,Zhao Yongsheng,Li Tianyi,et al.Properties of calcium peroxide for release of hydrogen peroxide and oxygen:A kinetics study[J].Chemical Engineering Journal,2016,303:450-457.
[3]Romero A,Santos A,Vicente F.In situ oxidation remediation technologies:Kinetic of hydrogen peroxide decomposition on soil organic matter[J].Journal of Hazardous Materials,2009,170(2-3):627-632.
[4]Koenigsberg S S,Sandefur C A.The use of oxygen release compound for the accelerated bioremediation of aerobically degradable contaminants:The advent of time-release electron acceptors[J].Remediation Journal,2008,10(1):3-29.
[5]张启超,杨鑫,孙淑雲,等.过氧化钙在处理厌氧底泥中的应用初探[J].湖泊科学,2015,(6):1087-1092.
[6]王熙,孙飞云,董文艺.用过氧化钙控制城市河道底泥嗅味物质及氮磷释放试验研究[J].水利水电技术,2012,43(8):66-69.
[7]Lu Shuguang,Zhang Xiang,Xue Yunfei.Application of calcium peroxide in water and soil treatment:A review[J]. Journal of Hazardous Materials,2017,337:163-177.
[8]谢李,刘菲,刘玉龙.释氧渗透反应格栅填料的改进研究[J].环境科学与技术,2010,(2):44-48.
[9]Chung-Seop Lee,Thao Le Thanh,Eun-Ju Kim,et al.Fabrication of novel oxygen-releasing alginate beads as an efficient oxygen carrier for the enhancement of aerobic bioremediation of 1,4-dioxane contaminated groundwater[J].Bioresource Technology,2014,171:59-65.
[10]Wu Chih-Hung,Chang Shih-Hsien,Lin Chi-Wen. Improvement of oxygen release from calcium peroxide-polyvinyl alcohol beads by adding low-cost bamboo biochar and its application in bioremediation[J].Clean-Soil Air Water,2015,43(2):287-295.
[11]Zhang F,Wu J,Kang D.Development of a complex hydrogel of hyaluronan and PVA embedded with silver nanoparticles and its facile studies on Escherichia coli[J]. Journal of Biomaterials Science,Polymer Edition,2013,24(12):1410-1425.
[12]Zhang L,Shen Q,Hu H.Impacts of Corbicula fluminea on oxygen uptake and nutrient fluxes across the sediment water interface[J].Water,Air,&Soil Pollution,2011,220(1-4):399-411.
[13]Matzinger A,Muller B,Niederhauser P,et al.Hypolimnetic oxygen consumption by sediment-based reduced substances in former eutrophic lakes[J]. Limnology and Oceanography,2010,55(5):2073-2084.
[14]刘涉江,姜斌,李鑫钢,等.过氧化钙释氧过程中碱度调控方法的研究[J].中国给水排水,2009,(11):79-82.
[15]Rongrong L,Xujie L,Qing T.The performance evaluation of hybrid anaerobic baffled reactor for treatment of PVA-containing desizing wastewater[J].Desalination,2011,271(1):287-294.
[16]Madsen Hel,Christensson F,Polyak Le,et al. Calcium phosphate crystallization under terrestrial and microgravity conditions[J].Journal of Crystal Growth,1995,152:191-202.
[17]王英秀.缓释氧材料制备与抑制底泥磷释放研究[D].上海:华东理工大学,2012.