【摘要】：有機質膠體與有機污染物的相互作用會影響污染物在多孔介質中遷移轉化等環(huán)境行為.為研究有機質膠體對藥物和個人護理品(PPCPs)在土壤環(huán)境中遷移的影響,本實驗以卡馬西平(CBZ)為目標污染物,用商用腐殖酸制備有機質膠體,分別選擇石英砂、標準土和野外所取土樣為研究介質,通過室內土柱模擬實驗探究有機質膠體存在時污染物在多孔介質中的遷移行為.結果表明,描述一維溶質運移的兩點化學非平衡模型能夠較好模擬CBZ在各介質土中的運移過程,說明污染物運移過程中與介質間發(fā)生了化學非平衡吸附作用;石英砂柱中加入膠體后,對CBZ的吸附過程無明顯影響,但在解吸時阻滯因子及滯留量變小,可見膠體與石英砂間作用微弱,解吸過程中膠體與污染物結合形成復合體后對污染物有增溶作用;膠體存在時,標準土和自然土對CBZ的吸附量和遷移阻滯強度均明顯大于石英砂,其中有機質及黏土礦物的作用最為明顯,有機質中的低能/高能吸附位點以及黏土礦物極性表面均能夠固定污染物;由于有機質含量較高,自然土對CBZ在吸附-解吸過程中的阻滯截留強度大于標準土.針對本實驗中CBZ的遷移情況,提出了疏水性有機污染物在含有機質膠體土壤中的遷移過程中各種作用的概念模型.
[Abstract]:The interaction between organic matter colloid and organic pollutants will affect the environmental behavior such as migration and transformation of pollutants in porous media. In order to study the effect of organic matter colloid on the migration of drug and personal nursing product (PPCPs) in soil environment, carbamazepine (CBZ) was used as the target pollutant to prepare organic matter colloid with commercial humic acid. Quartz sand was selected respectively. The standard soil and the soil samples taken in the field were used as the research medium. the migration behavior of pollutants in porous media in the presence of organic matter colloid was studied by indoor soil column simulation experiment. The results show that the two-point chemical non-equilibrium model describing one-dimensional solute transport can simulate the transport process of CBZ in each medium soil, which indicates that the chemical non-equilibrium adsorption occurs between the pollutant transport process and the medium. After adding colloid to quartz sand column, it had no obvious effect on the adsorption process of CBZ, but the blocking factor and retention decreased during desorption, which showed that the interaction between colloid and quartz sand was weak. In the process of desorption, colloid and pollutant combine to form complex, and it has solubilization effect on pollutants. In the presence of colloid, the adsorption capacity and migration blocking strength of CBZ in standard soil and natural soil are significantly higher than those in quartz sand, and the effect of organic matter and clay minerals is the most obvious. The low energy / high energy adsorption sites in organic matter and the polar surface of clay minerals can fix pollutants. Due to the high content of organic matter, the blocking and interception strength of CBZ in natural soil during adsorption and desorption was higher than that in standard soil. In view of the migration of CBZ in this experiment, the conceptual models of various roles of hydrophobic organic pollutants in soil containing organic colloids were proposed.
【作者單位】： 中國地質大學(北京)水資源與環(huán)境學院水資源與環(huán)境工程北京市重點實驗室;
【基金】：環(huán)境保護公益性行業(yè)科研專項(201309001-4) 中央高�；究蒲袠I(yè)務費專項(35832015023)
【分類號】：X131

【參考文獻】

相關期刊論文 前10條

1 王蘭君;王金花;朱魯生;王軍;趙祥;;4種典型PPCPs對蠶豆和大蒜根尖細胞微核率的影響[J];環(huán)境科學;2016年04期

2 謝黎;陳本壽;張進忠;盧松;江韜;;3種低分子量有機酸對紫色土吸附菲的影響[J];環(huán)境科學;2016年03期

3 孫約兵;徐應明;孫揚;秦旭;;硝磺草酮在黑土和紅壤中的吸附-解吸特性[J];環(huán)境化學;2015年10期

4 王丹;隋倩;呂樹光;趙文濤;邱兆富;余剛;;黃浦江流域典型藥物和個人護理品的含量及分布特征[J];中國環(huán)境科學;2014年07期

5 喬肖翠;何江濤;楊蕾;鄒合萍;;DOM及pH對典型PAHs在土壤中遷移影響模擬實驗研究[J];農業(yè)環(huán)境科學學報;2014年05期

6 趙曉麗;畢二平;;水溶性有機質對土壤吸附有機污染物的影響[J];環(huán)境化學;2014年02期

7 崔嵩;劉麗艷;李一凡;;土壤有機質影響多氯聯(lián)苯土壤殘留變化特征[J];中南大學學報(自然科學版);2013年11期

8 王磊;孫成;郭會琴;;土壤有機質對疏水性有機污染物的非線性吸附及其影響因素[J];土壤;2012年03期

9 王志霞;葛小鵬;晏曉敏;林進;周巖梅;王東升;;溶解性有機質對菲在沉積物上吸附與解吸性能的影響[J];中國環(huán)境科學;2012年01期

10 孟慶俊;張彥;馮啟言;張雙圣;;腐殖酸對NH_4~+-N在飽和含水層中遷移的影響[J];環(huán)境科學;2011年11期

相關碩士學位論文 前1條

1 李p，

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