为了解径流雨水中溶解性有机物的分子量分布及其与重金属离子的相互作用,采集北京南三环一处典型住宅区的径流雨水样品,采用超滤技术对样品中的DOM进行分子量分级,并采用紫外-可见吸收光谱与三维荧光光谱对不同分子量区间的DOM进行表征.选取径流雨水中含量较高的Cu2+作为重金属离子代表,与不同分子量区间的DOM进行滴定实验,运用荧光猝灭模型拟合与Cu2+络合物的条件稳定常数(KM)及结合容量(CL).实验结果表明,小于1 kDa的有机物所占比例最高,其DOC占雨水样品DOC含量的41％;各分子量DOM的化学组成无明显区别,主要为紫外类腐殖质;分子量为1-3 kDa的DOM其芳香性有机碳或含共轭不饱和双键有机物所占比例相对较高,而3-5 kDa的DOM分子其芳环上一些含氧官能团(如羰基、羟基、羧基、酯类)的取代程度较高;此外,比较不同分子量区间DOM的与Cu2+络合物的条件稳定常数及结合容量,可知1-3 kDa区间的有机物条件稳定常数值最大,3-5 kDa的DOM组分拥有更大的结合容量.实验结果表明,低分子量的有机物(＜5 kDa)是径流雨水中DOM的主要组成部分,其更易于与Cu2+结合.
参考文献
| [1] | 李俊奇;车伍.城市雨水问题与可持续发展对策[J].城市环境与城市生态,2005(4):5-8. |
| [2] | Santos, P.S.M.;Santos, E.B.H.;Duarte, A.C..First spectroscopic study on the structural features of dissolved organic matter isolated from rainwater in different seasons[J].Science of the Total Environment,2012:172-179. |
| [3] | 赵晓丽;毕二平.水溶性有机质对土壤吸附有机污染物的影响[J].环境化学,2014(2):256-261. |
| [4] | 蔡文良;许晓毅;罗固源;杜娴.长江重庆段溶解性有机物的荧光特性分析[J].环境化学,2012(7):1003-1008. |
| [5] | Y.C.Bai;F.C.Wu;C.Q.Liu.Ultraviolet absorbance titration for determining stability constants of humic substances with Cu(II) and Hg(II)[J].Analytica chimica acta,20081(1):115-121. |
| [6] | G. G. Tushara Chaminda;Fumiyuki Nakajima;Hiroaki Furumai;Ikuro Kasuga;Futoshi Kurisu.Comparison of metal (Zn and Cu) complexation characteristics of DOM in urban runoff, domestic wastewater and secondary effluent[J].Water Science and Technology,20109(9):2044-2050. |
| [7] | Kiikkila, O.;Kitunen, V.;Smolander, A..Chemical and biological characterization of dissolved organic matter derived from Norway spruce litter divided into fractions according to molecular size.[J].European Journal of Soil Biology,2012:109-111. |
| [8] | Pal Gundersen;Eiliv Steinnes.Influence of pH and TOC concentration on Cu, Zn, Cd, and Al speciation in rivers[J].Water research: A journal of the international water association,20032(2):307-318. |
| [9] | 杨毅;杨霞霞;马新培;李志华.pH对城市污水二级出水中溶解性有机物的荷电、聚集与光谱特性的影响?[J].环境化学,2015(10):1804-1808. |
| [10] | Mary Ellen Tuccillo.Size fractionation of metals in runoff from residential and highway storm sewers[J].Science of the Total Environment,20061/3(1/3):288-300. |
| [11] | 李璐璐;江韬;闫金龙;郭念;魏世强;王定勇;高洁;赵铮.三峡库区典型消落带土壤及沉积物中溶解性有机质（DOM）的紫外-可见光谱特征[J].环境科学,2014(3):933-941. |
| [12] | 魏群山;罗专溪;陈强;颜昌宙.天然水体溶解性有机物（DOM）分级组分对典型城市源污染的荧光响应[J].环境科学研究,2010(10):1229-1235. |
| [13] | Jennifer K. Gilbert;John C. Clausen.Stormwater runoff quality and quantity from asphalt, paver, and crushed stone driveways in Connecticut[J].Water research: A journal of the international water association,20064(4):826-832. |
| [14] | Jeffrey N. Brown;Barrie M. Peake.Sources of heavy metals and polycyclic aromatic hydrocarbons in urban stormwater runoff[J].Science of the Total Environment,20061/3(1/3):145-155. |
| [15] | XIAODI HAO.A megacity held hostage: Beijing's conflict between water and economy[J].Water21: Magazine of the International Water Association,2012Jun.(Jun.):39-42. |
| [16] | ROBERT J. KIEBER;ROBERT F. WHITEHEAD;SETH N. REID;JOAN D. WILLEY;PAMELA J. SEATON.Chromophoric Dissolved Organic Matter (CDOM) In Rainwater, Southeastern North Carolina, USA[J].Journal of atmospheric chemistry,20061(1):21-41. |
| [17] | He, PJ;Zheng, Z;Zhang, H;Shao, LM;Tang, QY.PAEs and BPA removal in landfill leachate with Fenton process and its relationship with leachate DOM composition[J].Science of the Total Environment,200917(17):4928-4933. |
| [18] | CESAR PLAZA;GENNARO BRUNETTI;NICOLA SENESI;ALFREDO POLO.Molecular and Quantitative Analysis of Metal Ion Binding to Humic Acids from Sewage Sludge and Sludge-Amended Soils by Fluorescence Spectroscopy[J].Environmental Science & Technology: ES&T,20063(3):917-923. |
| [19] | Nebbioso, A.;Piccolo, A..Molecular characterization of dissolved organic matter (DOM): A critical review[J].Analytical and bioanalytical chemistry,20131(1):109-124. |
| [20] | 曾宪成.在第二届全国绿色环保肥料新技术新产品交流会上的讲话[J].腐植酸,2002(04):4-6. |
| [21] | Patricia S.M. Santos;Marta Otero;Regina M.B.O. Duarte;Armando C. Duarte.Spectroscopic Characterization Of Dissolved Organic Matter Isolated From Rainwater[J].Chemosphere: Environmental toxicology and risk assessment,20098(8):1053-1061. |
| [22] | Peuravuori J;Pihlaja K.Molecular size distribution and spectroscopic properties of aquatic humic substances[J].Analytica chimica acta,19972(2):133-149. |
| [23] | 田林锋;胡继伟;李存雄;黄先飞;谢伟芳.通过DOM的光谱特性对长江源头典型高原深水湖泊进行评价[J].中国工程科学,2010(6):80-84,112. |
| [24] | Fuentes M;Gonzalez-Gaitano G;Ma Garcia-Mina J.The usefulness of UV-visible and fluorescence spectroscopies to study the chemical nature of humic substances from soils and composts[J].Organic Geochemistry: A Publication of the International Association of Geochemistry and Cosmochemistry,200612(12):1949-1959. |
| [25] | 王齐磊;江韬;赵铮;木志坚;魏世强;闫金龙;梁俭.三峡库区典型农业小流域土壤溶解性有机质的紫外-可见及荧光特征[J].环境科学,2015(3):879-887. |
| [26] | Toming, K.;Tuvikene, L.;Vilbaste, S.;Agasild, H.;Viik, M.;Kisand, A.;Feldmann, T.;Martma, T.;Jones, R.I.;N?ges, T..Contributions of autochthonous and allochthonous sources to dissolved organic matter in a large, shallow, eutrophic lake with a highly calcareous catchment[J].Limnology and Oceanography,20134(4):1259-1270. |
| [27] | Sybil R. Seitzinger;Renee M. Styles;Ron Lauck;Monica A. Mazurek.Atmospheric pressure mass spectrometry: a new analytical chemical characterization method for dissolved organic matter in rainwater[J].Environmental Science & Technology: ES&T,20031(1):131-137. |
| [28] | Chen, Wei;Habibul, Nuzahat;Liu, Xiao-Yang;Sheng, Guo-Ping;Yu, Han-Qing.FTIR and Synchronous Fluorescence Heterospectral Two-Dimensional Correlation Analyses on the Binding Characteristics of Copper onto Dissolved Organic Matter[J].Environmental Science & Technology: ES&T,20154(4):2052-2058. |
| [29] | Huacheng Xu;Guanghui Yu;Liuyan Yang;Helong Jiang.Combination of two-dimensional correlation spectroscopy and parallel factor analysis to characterize the binding of heavy metals with DOM in lake sediments[J].Journal of hazardous materials,2013Dec.15 Pt.2(Dec.15 Pt.2):412-421. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%