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环境化学  2015 

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

Keywords: 二级出水,DOM,pH值,荷电特性,聚集特性,光谱特性

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Abstract:

通过对城市污水二级出水中溶解性有机物(DOM)的Zeta电位和粒径变化规律的研究,探讨pH值对二级出水中DOM的荷电状态、聚集状态与光谱特性的影响.结果表明,城市污水二级出水中DOM在pH值小于4和大于10时具有自我凝聚的特性.随pH值增大,DOM的Zeta电位绝对值逐渐升高.pH值小于4时,随pH值降低,DOM的聚合度增大,粒径迅速增大,将荧光基团包裹在内,荧光峰荧光强度降低.随pH值增大,pH值在5—9时,DOM粒子聚合度降低,粒径减小,荧光强度有所增强;pH值大于10时,DOM的聚合度增大而将发射荧光基团包裹在内,荧光强度减弱.DOM的荧光等高线谱图表明其主要含有难降解的腐殖酸类有机物.荧光指数FI值在1.86—2.96内,表明DOM主要是生物来源且芳香度较低.DOM的E3/E4值表明随pH值增大,DOM腐殖化程度逐渐减小.UV253/UV203比值说明pH值不会明显地改变二级出水DOM苯环的取代程度.

References

[1]  Gondar D, Iglesias A, Lopez R, et al. Copper binding by peat fulvic and acids extracted from two horizon of ombrotrophic peat bog[J]. Chemosphere, 2006, 63: 82-88
[2]  肖隆庚, 陈文松, 陈国丰, 等. 中国南海CDOM三维荧光光谱特征研究[J]. 环境科学学报, 2014, 34(1): 160-167
[3]  谢伟芳, 阮小燕, 胡继伟. 南明河沉积物孔隙水中溶解有机质的光谱特性[J]. 绿色科技, 2013, (4):195-199
[4]  Zhang L Q, Wang L, Zhang G, et al. Fouling of nanofiltration membrane by effluent organic matter: Characterization using different fractions in wastewater[J]. Journal of Environmental Sciences, 2009, 21(1): 49-53
[5]  Wu J, Zhang H, He P J, et al. Insight into the heavy metal binding potential of dissolved organic matter in MSW leachate using EEM quenching combined with PARAFAC analysis[J]. Science Direct., 2011, 45(5): 1711-1719
[6]  韩芸, 周学瑾, 彭党聪, 等. 氯消毒对城市污水中DOM的三维荧光特性影响[J]. 环境工程学报, 2012, 6(7): 2226-2230
[7]  Shon H K, Vigneswaran S, Snyder S A. Effluent organic matter(EfOM) in wastewater: constituents, effects, and treatment[J]. Critical Reviews in Environmental Science and Technology, 2006, 36(4):327-374
[8]  Furukawa K, Takahashi Y. Effect of complexation with humic substances on diffusion of metal ions in water[J]. Chemosphere, 2008, 73(8): 1272-1278
[9]  Liu J, Wang J, Chen Y H, et al. Comparative characterization of two natural humic acids in the Pearl River Basin, China and their environmental implications[J]. Journal of Environmental Sciences, 2010, 22(11): 1695-1702
[10]  刘小静, 吴晓燕, 齐彩亚, 等. 三维荧光光谱分析技术的应用研究进展[J]. 河北工业科技, 2012, 29(6):422-431
[11]  王旭东, 刘佩, 王磊, 等. 城市污水二级出水中溶解性有机物特性分析[J]. 环境工程学报, 2014, 8(6):2186-2190
[12]  Tang S J, Wang Z W, Wu Z C, et al. Role of dissolved organic matters (DOM) in membrane fouling of membrane bioreactors for municipal wastewater treatment[J]. Journal of Hazardous Materials, 2010, 178(1/3):377-384
[13]  曲颖, 王磊, 王旭东, 等. 城市污水二级出水有机物性状及对膜污染的贡献[J]. 水处理技术, 2012, 38(8):15-19.
[14]  Chern J M, Chien Y W. Adsorption of nitrophenol onto activated carbon:isotherms and breakthrough curves[J]. Water Research, 2002, 36(3): 647-655
[15]  张鲜, 王莹, 高薇, 等. 紫外可见分光光度法测定污水中间-硝基苯酚的含量[J]. 沈阳师范大学学报(自然科学版), 2012, 30(4):531-533

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