本文選題：天然水化學(xué)　切入點(diǎn)：有機(jī)物　出處：《環(huán)境科學(xué)》2016年12期

【摘要】：為分析我國南方農(nóng)田生態(tài)系統(tǒng)淺層地下水污染特征及主要污染物的地球化學(xué)行為,以太湖流域典型農(nóng)田區(qū)域?yàn)閷?duì)象,聯(lián)合常規(guī)水質(zhì)分析方法、熒光光譜技術(shù)和多元統(tǒng)計(jì)分析手段,研究了淺層地下水的水化學(xué)特性、溶解性有機(jī)物和重金屬分布特征及其成因.結(jié)果表明,研究區(qū)水體呈還原態(tài),淺層地下水的水化學(xué)類型為HCO3-Ca·Na,三氮含量中硝態(tài)氮最高,氨氮、亞硝態(tài)氮次之.類腐殖酸、類色氨酸和類酪氨酸為淺層地下水中溶解性有機(jī)物的主要組分,由陸源與生物內(nèi)源雙重貢獻(xiàn).影響地下水中溶解性有機(jī)物分布的主要因素為地表水補(bǔ)給及地下水流方向.所檢測(cè)的9種重金屬元素,Fe和Cr平均濃度高于國家地下水環(huán)境質(zhì)量Ⅲ類標(biāo)準(zhǔn),且部分點(diǎn)位的Fe、Cr、Mn、Zn含量存在超標(biāo).相關(guān)性分析結(jié)果顯示,熒光性有機(jī)物變化特征可較好反映淺層地下水的污染狀況,其中類蛋白物質(zhì)與氨氮密切相關(guān);Cu、Ni分布與DOC相關(guān),且主要絡(luò)合于小分子熒光性有機(jī)物上.
[Abstract]:In order to analyze the characteristics of shallow groundwater pollution and the geochemical behavior of main pollutants in the farmland ecosystem of southern China, the typical farmland area of Taihu Lake Basin is taken as the object, and the conventional water quality analysis method is combined. The characteristics of hydrochemistry, the distribution of dissolved organic matter and heavy metals and the causes of formation of shallow groundwater were studied by fluorescence spectroscopy and multivariate statistical analysis. The results showed that the water bodies in the study area were reduced. The hydrochemical type of shallow groundwater is HCO3-Ca Na, the nitrate nitrogen is the highest, ammonia nitrogen and nitrite nitrogen are the second, humic acid, tryptophan and tyrosine are the main components of dissolved organic matter in shallow groundwater. The main factors affecting the distribution of dissolved organic matter in groundwater are the recharge of surface water and the direction of groundwater flow. Class 鈪，

本文編號(hào)：1686171