1,1,2,2-四氯乙烷在土壤中的吸附解吸研究及解吸滞后的新型模型模拟--《农业环境科学学报》2011年02期

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PE?-O"c6AX SP01,1,2,2-四氯乙烷在土壤中的吸附解吸研究及解吸滞后的新型模型模拟

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王方 张承东

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J4_(b.e8{8s VI`_0【摘要】:采用室内实验方法,研究了1,1,2,2-四氯乙烷(1,1,2,2-tetrachloroethane,1,1,2,2-TeCA)在4种土壤上的吸附和解吸行为,并用一种新型解吸模型——"双元平衡解吸(Dual-EquilibriumDesorption,DED)模型"对其解吸行为进行了预测。结果表明,1,1,2,2-TeCA在4种土壤上的吸附符合传统的线性吸附模型,lgKoc的平均值为1.86;解吸行为则表现出明显的滞后现象,解吸后的lgKo(c平均值约为4.88)显著大于初始值,且与吸附相污染物的初始浓度、土壤性质无相关性。DED模型比传统线性模型能更好地拟合TeCA在土壤中的解吸滞后现象。水利论文x@'|!a:U

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【作者单位】:

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南开大学环境科学与工程学院天津市城市生态环境修复与污染防治重点实验室环境污染过程与基准教育部重点实验室;水利论文DL:K'mA#W7Z n]

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H!}]2w:qkw0-四氯乙烷 吸附 解吸

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|nu dt*Rk Wd'U7l l0【基金】:高等学校博士学科点专项科研基金资助课题(20060055035)水利论文)| l*_1[O8v0O

6ZL.D0uU0科技部国际科技合作项目(2009DFA91910)水利论文Fr.B NWp5O

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6m)JPr*X;A2a"vi4h0氯代挥发性有机物(VOCs)已被广泛应用于干洗、油漆制造、有机合成以及各行业(如仪器制造、曝光电子、印刷等)的金属脱油洗涤等领域中,是一类重要的环境污染物。氯代挥发性有机物对人的中枢神经系统、呼吸系统、肾脏和肝脏等都有毒害作用,且被怀疑具有潜在的致癌作用。鉴于很水利论文F p DEn B

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