介質(zhì)pH對滲濾液中水溶性有機物熒光光譜特性的影響

摘要：采用熒光分析方法,對不同pH條件下3個填埋年限滲濾液中水溶性有機物(DOM)的熒光特性進行了研究.同步熒光光譜表明,填埋1年及10年滲濾液DOM的同步熒光圖中各峰的熒光強度pH 4時最強;填埋5年滲濾液DOM在pH 12時熒光強度最強,而pH 4時的熒光強度次之.滲濾液DOM三維熒光光譜表明,填埋1及5年類蛋白峰強度在pH 10達到最大,而填埋10年在pH 8熒光強度最強;可見區(qū)類富里酸峰強度在pH=10達到最大值,而紫外區(qū)類富里酸峰較強的熒光強度則分別在pH 4和10時;與類富里酸物質(zhì)相比,類蛋白物質(zhì)更容易受pH的影響.紫外區(qū)類富里酸熒光強度與可見區(qū)類富里酸熒光強度比值[r_((A,C))]受pH的變化影響較大,因此,當比較不同來源DOM的r_((A,C))值時,應(yīng)使其pH處于同一水平.Abstract：Due to its high sensitivity,good selectivity and nondestructivity nature,fluorescence technique is suitable to the study of DOM.In the present study,fluorescence characteristics of dissolved organic matter(DOM)from three different ages of landfill leaehate(1a,5a,10a)under different pH value were investigated.The fluorescence synchronous scan spectroscopy showed that,in addition to the characteristic each age of landfill leachate owned separately,DOM from three ages of landfill leachate shared some common characteristics with the change in pH as follows:the fluorescence peaks of DOM exhibited in synchronous scan spectroscopy from 1 and 5-year-old leachate showed the maximum fluorescence intensity at pH 5,while that of DOM from 10-year-old landfill leachate appeared at pH 12,and the fluorescence intensity of most fluorescence peaks of DOM from 10-yearold landfill leachate exhibited in synchronous scan spectroscopy at pH 4 ranked second.The three-dimensional fluorescence excitation-emission matrix spectroscopy(3DEEM)suggested that the fluorescence intensity of the protein-like peaks of DOM from all three ages of landfill leaehate increased with pH value increasing,and the maximum fluorescence occurred at pH 10,while that of DOM from 10-year-old appeared at pH 8;the fluorescence intensity of the visible fulvie-like peaks of DOM from all three ages of landfill leachate was enhanced with pH increasing,and exhibited the maximum fluorescence intensity at pH 10,while the relation curve between the fluorescence intensity of the UV fulvic-like and pH value of DOM from all three year ages of landfill leachate exhibited two peaks,one occurred at pH 4,and the other appeared at pH 10.3 DEEM also indicated that compared to the fluvic-like matter,the protein-like matter was more easily influenced by pH value.The relation between the r_((A,C))value andpH value suggested that the former relied on the latter.If we would compare the r_((A,C))values of DOM originating differently,the authors should compare each other under the same pH value. 作者： 趙越[1]何小松[2]席北斗[3]魏丹[4]魏自民[1]姜永海[3]李鳴曉[1]楊天學[1] Author： ZHAO Yue[1]  HE Xiao-song[2]  XI Bei-dou[3]  WEI Dan[4]  WEI Zi-min[1]  JIANG Yong-hai[3]  LI Ming-xiao[1]  YANG Tian-xue[1] 作者單位： 東北農(nóng)業(yè)大學生命科學學院,黑龍江,哈爾濱,150030東北農(nóng)業(yè)大學生命科學學院,黑龍江,哈爾濱,150030;北京師范大學環(huán)境學院,北京,100875中國環(huán)境科學研究院水環(huán)境系統(tǒng)研究室,北京,100012黑龍江省農(nóng)業(yè)科學院土壤肥料研究所,黑龍江,哈爾濱,150086 期 刊： 光譜學與光譜分析   ISTICEISCIPKU Journal： SPECTROSCOPY AND SPECTRAL ANALYSIS 年，卷(期)： 2010, 30(2) 分類號： X705 關(guān)鍵詞： pH    滲濾液    水溶性有機物    熒光光譜    Keywords： pH    Leachate    Dissolved organic matter    Fluorescence spectrum    機標分類號： O65 R97 機標關(guān)鍵詞： 介質(zhì)    滲濾液    水溶性有機物    熒光光譜特性    Landfill Leachate    Dissolved Organic Matter    fluorescence intensity    landfill leachate    熒光強度    DOM    pH value    富里酸    three    dissolved organic matter    填埋    ages    different    同步熒光光譜    high sensitivity    熒光分析方法 基金項目： 科技部科研項目，黑龍江省自然科學基金，國家科技支撐計劃

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