發(fā)布時(shí)間：2018-05-07 14:58

  本文選題：多環(huán)芳烴 + 溶解性有機(jī)質(zhì)��； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：本文以淮南潘一楊莊采煤沉陷區(qū)和謝橋采煤沉陷區(qū)為研究對(duì)象,通過實(shí)地勘察采樣、樣品指標(biāo)檢測(cè)及數(shù)據(jù)分析,對(duì)沉陷區(qū)水體、周圍土壤及沉陷區(qū)底泥中16種優(yōu)先控制的PAHs進(jìn)行定性和定量分析,查明沉陷區(qū)多環(huán)境介質(zhì)中PAHs的含量和污染特征、研究各樣品中DOM的含量并簡(jiǎn)單分析其組分種類、探討變化生境下采煤沉陷區(qū)DOM對(duì)PAHs環(huán)境行為的影響。主要結(jié)論如下:1.楊莊采煤沉陷區(qū)水樣中PAHs總含量范圍為79.72-205.70 ng/L,平均含量142.31 ng/L,土壤中 PAHs 總含量范圍為 109.00-6540.64 ng/g,平均含量 1191.88 ng/g,底泥中PAHs總含量范圍為60.67-5460.57 ng/g,平均含量1145.07 ng/g;謝橋采煤沉陷區(qū)水樣中PAHs總含量范圍為123.27-194.79 ng/L,平均含量158.14 ng/L,土壤中PAHs總含量范圍為26.58-1597.87 ng/g,平均含量267.37 ng/g,底泥中PAHs總含量范圍為44.64-180.49 ng/g,平均含量99.06 ng/g。2.楊莊采煤沉陷區(qū)PAHs分布特征為:水和底泥中沉陷區(qū)西面和北面PAHs總含量較高,由西往東有下降的趨勢(shì),沉陷區(qū)西北方向土壤中的PAHs含量較高,以YZTR12為中心向兩邊有下降的趨勢(shì);謝橋采煤沉陷區(qū)PAHs分布特征為:水和底泥中沉陷區(qū)南面PAHs總含量較高,由南向北有下降的趨勢(shì),沉陷區(qū)北面土壤中PAHs分布較均勻,含量較低。3.楊莊采煤沉陷區(qū)水樣中DOM含量范圍為4.29-5.60 mg/L,平均含量4.85 mg/L,由西北向東南呈逐漸下降的趨勢(shì),可能與煤矸石堆的分布有關(guān);謝橋水樣DOM含量范圍為2.94-6.53 mg/L,平均含量5.21 mg/L,其含量呈現(xiàn)南高北低的規(guī)律,主要原因是沉陷區(qū)南側(cè)有多家燃煤燒磚廠。4.楊莊、謝橋兩個(gè)采煤沉陷區(qū)土壤中PAHs含量較高的樣品,其對(duì)應(yīng)DOM的主要出峰位置在區(qū)域Ⅰ或Ⅲ,屬于類蛋白質(zhì)物質(zhì),PAHs含量較低的樣品,其對(duì)應(yīng)DOM的主要出峰位置在區(qū)域Ⅱ或Ⅳ,屬于類腐殖質(zhì)物質(zhì);但在底泥中,呈現(xiàn)相反的規(guī)律,PAHs含量較高的樣品,其對(duì)應(yīng)DOM的主要出峰位置在區(qū)域Ⅱ或Ⅳ,PAHs含量較低的樣品,其對(duì)應(yīng)DOM的主要出峰位置在區(qū)域Ⅰ或Ⅲ。5.楊莊、謝橋兩個(gè)采煤沉陷水樣中PAHs與DOM的分布特征及其相似,可能原因是DOM與PAHs以共吸附或累積吸附的形式被水體介質(zhì)吸附,從而增加PAHs在水體中的吸附容量,降低PAHs在水體中的遷移性;在土壤中,類腐殖質(zhì)物質(zhì)對(duì)PAHs有增溶作用,能促進(jìn)PAHs解吸,提高其在土壤中的遷移性;而在底泥中,類腐殖質(zhì)物質(zhì)能促進(jìn)DOM與PAHs以共吸附或累積吸附的形式被底泥介質(zhì)吸附,從而增加PAHs在底泥中的吸附容量,降低PAHs在底泥中的遷移性。
[Abstract]:This paper takes Pan-Yangzhuang coal mining subsidence area in Huainan and Xieqiao coal mining subsidence area as the research object, through on-the-spot investigation and sampling, sample index detection and data analysis, the water body in the subsidence area is analyzed. Sixteen preferentially controlled PAHs in surrounding soil and sediment were qualitatively and quantitatively analyzed to find out the content and pollution characteristics of PAHs in multi-environmental media of subsidence area, to study the content of DOM in each sample and to analyze its components. The effect of DOM on the environmental behavior of PAHs in coal mining subsidence area under changing habitat was studied. The main conclusions are as follows: 1. The total content of PAHs in water of Yangzhuang coal mining subsidence area is 79.72-205.70 ng / L, the average content is 142.31 ng / L, the total content of PAHs in soil is 109.00-6540.64 ng / g, the average content of PAHs is 1191.88 ng / g, the total content of PAHs in sediment is 60.67-5460.57 ng / g, the average content is 1145.07 ng / g; The total content of PAHs was 123.27-194.79 ng / L, the average content was 158.14 ng / L, the total content of PAHs in soil was 26.58-1597.87 ng / g, the average content was 267.37 ng / g, and the total content of PAHs in sediment was 44.64-180.49 ng / g, with an average content of 99.06 ng / g 路2. The distribution characteristics of PAHs in Yangzhuang coal mining subsidence area are as follows: the total content of PAHs in the west and north of the subsidence area in water and sediment is relatively high, and the content of PAHs in the soil in the northwestern direction of the subsidence area is higher, with the YZTR12 as the center and on both sides. The distribution characteristics of PAHs in the coal mining subsidence area of Xieqiao are as follows: the total PAHs content in the south side of the subsidence area in water and sediment is relatively high, and the content of PAHs in the soil in the north of the subsidence area is more uniform, and the content of PAHs is lower than that in the north side of the subsidence area, with a decreasing trend from the south to the north. The content of DOM in the water samples of Yangzhuang coal mining subsidence area ranges from 4.29-5.60 mg / L, and the average content is 4.85 mg / L, which may be related to the distribution of coal gangue. The range of DOM content in water samples of Xieqiao is 2.94-6.53 mg / L, with an average content of 5.21 mg / L. The main reason is that there are many coal-fired brick plants in the south of the subsidence area. The samples with high PAHs content in two coal mining subsidence areas of Yangzhuang and Xieqiao, which correspond to the main peak location of DOM in region 鈪，

本文編號(hào)：1857375