【摘要】：采集遼河油田石油污染土壤樣品并用離心法提取膠體(10～5μm、5～2μm、2μm),定性和定量研究石油污染土壤以及土壤膠體的主要理化性質。通過間歇實驗研究不同pH(pH=4-9)、不同價態(tài)陽離子(Na+、Ca2+和Fe3+)和不同價態(tài)陰離子(NO3-、SO42-和P043-)存在下的膠體穩(wěn)定性,并比較陽離子存在下石油污染土壤膠體和未受污染土壤膠體穩(wěn)定性。通過淋濾實驗研究石油污染土壤膠體在不同粒徑(10～5μm、5～2μm、2μm)、溶液pH(3、6、9)和IS(0.001 mM、0.1 Mm、0.5 mM)環(huán)境條件下在土柱中運移規(guī)律以及對菲的易化運移作用。研究結果表明,石油污染土壤膠體穩(wěn)定性隨溶液的pH、陽離子、陰離子的變化而產生變化。并隨著土壤膠體粒徑的減小、溶液離子強度的減小和溶液pH的增加,土壤膠體的沉積能力減弱,運移能力增強。粒徑2μm的土壤膠體對菲的運移程度最大,其次為粒徑10～5 μm和5～2 μm,其淋出液中菲含量分別增加了142.42%、36.36%、 96.97%。石油污染土壤膠體對菲的運移能力隨pH的增加而增加,隨IS增加而減小。但當1S=0.5 mM時,石油污染土壤膠體對菲沒有易化運移作用,其淋出液中菲含量減少了9.09%。
[Abstract]:The oil contaminated soil samples from Liaohe Oilfield were collected and the colloids (10 ~ 5 渭 m, 5 ~ 2 渭 m, 2 渭 m) were extracted by centrifugation. The main physical and chemical properties of oil contaminated soil and soil colloid were studied qualitatively and quantitatively. The colloid stability in the presence of different pH (pH=4-9), different valence cations (Na, Ca2 and Fe3, and different valence anions (NO3-,SO42- and P043 -) was studied by batch experiments. The stability of petroleum-contaminated soil colloid and unpolluted soil colloid in the presence of cationic ions was compared. The oil contaminated soil colloids with different particle sizes (10 ~ 5 渭 m, 5 ~ 2 渭 m, 2 渭 m), solution pH (3,6,9) and IS (0.001 mM,0.1 Mm,) were studied by leaching experiments. 0.5 mM) migration law in soil column and facilitation of migration to phenanthrene under environmental conditions. The results showed that the stability of petroleum contaminated soil colloid changed with the change of pH, cation and anion in the solution. With the decrease of the particle size of the soil colloid, the decrease of the ionic strength of the solution and the increase of the solution pH, the deposition ability of the soil colloid decreases and the migration ability of the soil colloid increases. The soil colloid with the diameter of 2 渭 m had the largest migration of phenanthrene, followed by 10 渭 m and 5 渭 m, and the content of phenanthrene in the eluate increased by 142.42%, 36.36% and 96.97%, respectively. The migration capacity of petroleum-contaminated soil colloids to phenanthrene increased with the increase of pH and decreased with the increase of IS. However, when 1S=0.5 mM was used, the oil-contaminated soil colloids did not facilitate the transport of phenanthrene, and the content of phenanthrene in the eluate decreased by 9.09%.
【學位授予單位】：遼寧工程技術大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X53

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