不同来源天然有机质对菲与诺氟沙星光降解的影响研究
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摘要
为了探究天然有机质结构对有机污染物光降解的影响,选取7种天然有机质,在以氙灯为光源模拟太阳光条件下,研究这7种天然有机质对菲、诺氟沙星光解的影响。菲、诺氟沙星在纯水中光化学降解反应均符合准一级动力学。加入胡敏酸组分的溶液中菲、诺氟沙星降解速度普遍大于加入富里酸组分的溶液中菲、诺氟沙星的降解速度。黑土富里酸、胡敏酸之间结构差异较大,有机肥富里酸、胡敏酸之间结构差异较小。将天然有机质结构特征与菲、诺氟沙星降解系数进行相关性分析得出,胡敏酸类有机质比富里酸类有机质腐殖化程度更高,吸光能力更强,更容易吸收光子跃迁到激发三重态,将能量传递给基态污染物,促进菲、诺氟沙星更快地降解。
In order to explore the effect of natural organic matter on the photodegradation of organic pollutant, seven natural organic matter were selected. On the condition of using the xenon lamp as the light source to simulate the solar light, the effects of seven natural organic matters on the photolysis of phenanthrene and norfloxacin were studied in this paper. The photochemical degradation of phenanthrene and norfloxacin in pure water was fitted by pseudo first order kinetics. The degradation rate of phenanthrene and norfloxacin in humic acid solution was generally higher than that in the solution of fulvic acid. There was a great difference in structure characteristics between fulvic acid and humicacid in Black Soil, and there was little difference in manure structure between fulvic acid and humic acid. The correlation analysis between the structure characteristics of natural organic matter and the degradation coefficients of phenanthrene and norfloxacin showed that the humification degree of humic acid was higher than that of fulvic acid,and the absorbability of humic acid was stronger. Humic acid was more likely to absorb photon transition to stimulate the triplet state, transfer energy to the ground state pollutants, and promote the degradation of phenanthrene and norfloxacin.
In order to explore the effect of natural organic matter on the photodegradation of organic pollutant, seven natural organic matter were selected. On the condition of using the xenon lamp as the light source to simulate the solar light, the effects of seven natural organic matters on the photolysis of phenanthrene and norfloxacin were studied in this paper. The photochemical degradation of phenanthrene and norfloxacin in pure water was fitted by pseudo first order kinetics. The degradation rate of phenanthrene and norfloxacin in humic acid solution was generally higher than that in the solution of fulvic acid. There was a great difference in structure characteristics between fulvic acid and humicacid in Black Soil, and there was little difference in manure structure between fulvic acid and humic acid. The correlation analysis between the structure characteristics of natural organic matter and the degradation coefficients of phenanthrene and norfloxacin showed that the humification degree of humic acid was higher than that of fulvic acid,and the absorbability of humic acid was stronger. Humic acid was more likely to absorb photon transition to stimulate the triplet state, transfer energy to the ground state pollutants, and promote the degradation of phenanthrene and norfloxacin.
引文
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[25]李鸣晓,何小松,刘骏,等.鸡粪堆肥水溶性有机物特征紫外吸收光谱研究[J].光谱学与光谱分析, 2010, 30(11):3081-3085.
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[2]NARDI S,PIZZEGHELLO D,MUSCOLO A,et al.Physiological effects of humic substances on higher plants[J].Soil Biology&Biochemistry.2002,34:1527-1536.
[3]任东,杨小霞,马晓冬,等.DOM结构特征及其对17p-雌二醇光降解的影响[J].中国环境科学,2015,35(5):1375-1383.
[4]李恭臣,夏星辉,周追,等.富里酸在水体多环芳烃光化学降解中的作用[J].环境科学学报,2008,28(8):1604-1611.
[5]DE LAURENTIIS E,MINELLA M,MAURINO V,et a1.Photochemical production of organic matter triplet states in water samples from mountain lakes,located below or above the tree line[J].Chemosphere,2012,88:1208-1213.
[6]PAUL A,HACKBARTH S,VOGT R D,et a1.Photogeneration of singlet oxygen by humic substances:comparison of humic substances of aquatic and terrestrial origin[J].Photochemical&Photobiological Sciences,2004,3:273-280.
[7]GIEGUZYNSKA E,AMINE—KHODJA A,TRUBETSKOJ O A,et a1.Compositional differences between soil humic acids extracted by various methods as evidenced by photosensitizing and electrophoretic properties[J].Chemosphere,2009,75:1082-1088.
[8]葛林科.水中溶解性物质对氯霉素类和氟喹诺酮类抗生素光降解的影[D].大连:大连理工大学,2009.
[9]石辉,孙亚平.萘在土壤上的吸附行为及温度影响的研究[J].土壤通报,2010,41(2):308-313.
[10]周江敏,代静玉,潘根兴.土壤中水溶性有机质的结构特征及环境意义[J].农业环境科学学报,2003,22(6):731-735.
[11]梁辰.溶解性有机质对不同解离形态诺氟沙星光降解的影响[D].大连:大连理工大学,2014.
[12]申连玉,钱黎慧,代静玉,等.钙、钠饱和处理的次生硅酸盐矿物对多环芳烃(菲)吸附与光解行为[J].农业环境科学学报,2016,35(2):294-304.
[13]XI-ZHI NIU,FRANCESCO BUSETTI,MARKUS LANGSA,et al.Roles of singlet oxygen and dissolved organic matter in self-sensitized photo-oxidation of antibiotic norfloxacin under sunlight irradiation[J].Water Research,2016,106:214-222.
[14]顾志忙,王晓蓉,顾雪元,等.傅里叶变换红外光谱和核磁共振法对土壤中腐殖酸的表征[J].分析化学,2000,(3):314-317.
[15]NISHIJIMA W,GERALD E,SPEITLE J.Fate of biodegradable dissolved organic carbon produced by ozonation on biological activated carbon[J].Chemosphere,2004,56:113.
[16]WANG L Y,WU F C,ZHANG R Y,et al.Characterization of dissolved organic matter fractions from Lake Hongfeng,Southwestern China Plateau[J].Journal of Environmental Sciences,2009,21:581.
[17]占新华,周立祥,沈其荣,等.污泥堆肥过程中水溶性有机物光谱学变化特征[J].环境科学学报,2001,(4):470-474
[18]文启孝,等.土壤有机质研究法[M].北京:农业出版社,1984.
[19]王景贵,席时权,姜岩.红外光谱在土壤有机质研究中的应用[J].光谱学与光谱分析,1998,(1):53-58.
[20]刘本定,李夏,代静玉.XAD树脂分组水稻土富里酸组分的脂肪族特性[J].光谱学与光谱分析, 2007,(10):2032-2037.
[21]陈伟,陈晓旸,于海瀛.磺胺二甲嘧啶在水溶液中的光化学降解[J].农业环境科学学报, 2016, 35(2):346-352.
[22]刘慧,李竞时,朱小梅,等.模拟日光照射下土霉素的光降解研究[J].中国科技论文, 2015, 10(21):2477-2480.
[23] JAZMIN PORRAS, CRISTINA BEDOYA. Role of humic substances in the degradation pathways and residual antibacterial activity during the photodecomposition of the antibiotic ciprofloxacin in water[J].Water Research, 2016, 94:1-9.
[24]尉小旋,陈景文,王如冰,等.氧氟沙星和诺氟沙星的水环境光化学转化:p H值及溶解性物质的影响[J].环境化学, 2015, 34(3):448-454.
[25]李鸣晓,何小松,刘骏,等.鸡粪堆肥水溶性有机物特征紫外吸收光谱研究[J].光谱学与光谱分析, 2010, 30(11):3081-3085.
[26] MADDIGAPU P R, MINELLA M, VIONE D, et al. Modeling Phototransformation Reactions in Surface Water Bodies:2,4-Dichloro-6-Nitrophenol As a Case Study[J]. Environmental Science Technology, 2011, 45(1):209-214.