镍离子催化零价锌去除水中双氯芬酸
|
摘要
为了去除水中的双氯芬酸(DCF),研究了镍离子催化零价锌去除水中DCF的过程,探讨了镍离子投加量、溶液pH值、溶解氧质量浓度和旋转培养器转速等因素对DCF去除效果的影响。结果表明:镍离子可以有效催化锌粉去除水中DCF;镍离子的加入会加速锌的腐蚀并有利于生成活性氢原子,从而加快DCF的降解速率;随着镍离子投加量的增加,DCF的降解随之增快,当镍离子的浓度大于1.0mmol/L时,镍离子的增加不能显著加快反应速率;溶液pH值越低,DCF的降解越快,在弱酸性、中性和弱碱性条件下,DCF的去除效果较好;溶液溶解氧的质量浓度和较低的转速对DCF的降解无明显影响,较高的转速会抑制反应的进行。为去除水中DCF提供了一种新的方法,并为该方法的实际应用提供数据支持。
The removal of diclofenac(DCF)from water by zero-valent zinc catalyzed by nickel ions was studied.Effects of concentrations of the nickel ion,pH value of the solution,mass concentration of dissolved oxygen and rotating speed of the rotator on the removal efficiency of DCF were investigated.The results showed that:nickel ion could effectively catalyze zinc powder to remove DCF from water;the addition of nickel ion could accelerate the corrosion of zinc and facilitate the formation of active hydrogen atoms,leading to accelerated degradation of the DCF;the higher the concentration of nickel ions,the faster the degradation of DCF;however,the increase of the reaction rate was not obvious anymore when the concentration of nickel ion was greater than 1.0 mmol/L;the lower the pH value of the solution,the faster the degradation of DCF;DCF was more effectively removed from water under weak acidic,neutral and weak alkaline conditions;the mass concentration of dissolved oxygen and a low rotation speed had no significant influences on the degradation of DCF,while a high rotation speed could inhibit the reaction.Our research has provided a new method for removing DCF from water as well as data support for its practical applications.
The removal of diclofenac(DCF)from water by zero-valent zinc catalyzed by nickel ions was studied.Effects of concentrations of the nickel ion,pH value of the solution,mass concentration of dissolved oxygen and rotating speed of the rotator on the removal efficiency of DCF were investigated.The results showed that:nickel ion could effectively catalyze zinc powder to remove DCF from water;the addition of nickel ion could accelerate the corrosion of zinc and facilitate the formation of active hydrogen atoms,leading to accelerated degradation of the DCF;the higher the concentration of nickel ions,the faster the degradation of DCF;however,the increase of the reaction rate was not obvious anymore when the concentration of nickel ion was greater than 1.0 mmol/L;the lower the pH value of the solution,the faster the degradation of DCF;DCF was more effectively removed from water under weak acidic,neutral and weak alkaline conditions;the mass concentration of dissolved oxygen and a low rotation speed had no significant influences on the degradation of DCF,while a high rotation speed could inhibit the reaction.Our research has provided a new method for removing DCF from water as well as data support for its practical applications.
引文
[1]MCCLELLAN K,HALDEN R U.Pharmaceuticals and personal care products in archived U.S.biosolids from the 2001EPA national sewage sludge survey[J].Water research,2010,44(2):658-668.
[2]李文龙.电化学降解典型吡唑类医药化合物的研究[D].杭州:浙江工业大学,2014.
[3]温智皓,段艳平,孟祥周,等.城市污水处理厂及其受纳水体中5种典型PPCPs的赋存特征和生态风险[J].环境科学,2013,34(3):927-932..
[4]KLAMERTH N,RIZZO L,MALATO S.et al.Degradation of fifteen emerging contaminants atμg/L initial concentrations by mild solar photo-Fenton in MWTP effluents[J].Water research,2010,44(2):545-554.
[5]WESTERHOFF P,YOON Y,SNYDER S,et al.Fate of endocrine-disruptor,pharmaceutical,and personal care product chemicals during simulated drinking water treatment processes[J].Environmental science&technology,2005,39(17):6649-6663.
[6]ANTIGONI A,EVROULA H,NIKOLAOS P,et al.Factors affecting diclofenac decomposition in water by UV-A/TiO2photocatalysis[J].Chemical engineering journal,2010,161(1/2):53-59.
[7]王月,熊振湖,周建国.杯[4]芳烃修饰Amberlite XAD-4树脂去除水中双氯芬酸[J].中国环境科学,2012,32(1):81-88.
[8]段志婕,吴德礼,马鲁铭.零价金属还原技术处理氯代有机物的研究进展[J].环境科学与管理,2007,32(6):79-83.
[9]丁春生,李东兵,王卫文,等.零价铁去除饮用水中BCAN的研究[J].浙江工业大学学报,2015,43(5):587-590.
[10]周红艺,何志桥,潘志彦,等.金属铁及其化合物还原脱氯有机氯化物的研究[J].浙江工业大学学报,2002,30(1):65-69.
[11]刘菲,黄园英,张国臣.纳米镍/铁去除氯代烃影响因素的探讨[J].地学前缘,2006,13(1):150-154.
[12]韩莹.铁和锌及铁氧化物还原水中亚硝基二甲胺的效能与机理[D].哈尔滨:哈尔滨工业大学,2013.
[13]刘娜,赵勇胜,张兰英,等.锌粉降解地下水中的农药阿特拉津[J].中国环境科学,2006,26(1):116-119.
[14]KIM E J,KIN J H,CHANG Y S,et al.Effects of metal ions on the reactivity and corrosion electrochemistry of Fe/FeS nanoparticles[J].Environmental science&technology,2014,48(7):4002-4011.
[15]韩莹,王济禾,李军,等.氧化铜催化零价铁还原水中亚硝基二甲胺[J].中国环境科学,2017,37(6):2100-2105.
[2]李文龙.电化学降解典型吡唑类医药化合物的研究[D].杭州:浙江工业大学,2014.
[3]温智皓,段艳平,孟祥周,等.城市污水处理厂及其受纳水体中5种典型PPCPs的赋存特征和生态风险[J].环境科学,2013,34(3):927-932..
[4]KLAMERTH N,RIZZO L,MALATO S.et al.Degradation of fifteen emerging contaminants atμg/L initial concentrations by mild solar photo-Fenton in MWTP effluents[J].Water research,2010,44(2):545-554.
[5]WESTERHOFF P,YOON Y,SNYDER S,et al.Fate of endocrine-disruptor,pharmaceutical,and personal care product chemicals during simulated drinking water treatment processes[J].Environmental science&technology,2005,39(17):6649-6663.
[6]ANTIGONI A,EVROULA H,NIKOLAOS P,et al.Factors affecting diclofenac decomposition in water by UV-A/TiO2photocatalysis[J].Chemical engineering journal,2010,161(1/2):53-59.
[7]王月,熊振湖,周建国.杯[4]芳烃修饰Amberlite XAD-4树脂去除水中双氯芬酸[J].中国环境科学,2012,32(1):81-88.
[8]段志婕,吴德礼,马鲁铭.零价金属还原技术处理氯代有机物的研究进展[J].环境科学与管理,2007,32(6):79-83.
[9]丁春生,李东兵,王卫文,等.零价铁去除饮用水中BCAN的研究[J].浙江工业大学学报,2015,43(5):587-590.
[10]周红艺,何志桥,潘志彦,等.金属铁及其化合物还原脱氯有机氯化物的研究[J].浙江工业大学学报,2002,30(1):65-69.
[11]刘菲,黄园英,张国臣.纳米镍/铁去除氯代烃影响因素的探讨[J].地学前缘,2006,13(1):150-154.
[12]韩莹.铁和锌及铁氧化物还原水中亚硝基二甲胺的效能与机理[D].哈尔滨:哈尔滨工业大学,2013.
[13]刘娜,赵勇胜,张兰英,等.锌粉降解地下水中的农药阿特拉津[J].中国环境科学,2006,26(1):116-119.
[14]KIM E J,KIN J H,CHANG Y S,et al.Effects of metal ions on the reactivity and corrosion electrochemistry of Fe/FeS nanoparticles[J].Environmental science&technology,2014,48(7):4002-4011.
[15]韩莹,王济禾,李军,等.氧化铜催化零价铁还原水中亚硝基二甲胺[J].中国环境科学,2017,37(6):2100-2105.