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Trion X-100对土壤中柴油的解吸特征及影响因素
李晓东,许端平,张倩,马福俊,黎宁,伍斌,谷庆宝,等
作者单位E-mail
李晓东 辽宁工程技术大学环境科学与工程学院中国环境科学研究院土壤与固废环境研究所 lixd1991@sina.com 
许端平 辽宁工程技术大学环境科学与工程学院  
张倩 中国环境科学研究院土壤与固废环境研究所  
马福俊 中国环境科学研究院土壤与固废环境研究所  
黎宁 广西壮族自治区环境监测中心站  
伍斌 中国环境科学研究院土壤与固废环境研究所 wubin@craes.org.cn 
谷庆宝 中国环境科学研究院土壤与固废环境研究所  
摘要:
为考察非离子表面活性剂Trion X-100对土壤中柴油解吸特性及土壤理化性质对其解吸的影响,通过振荡平衡法研究了Trion X-100对浙江水稻土、重庆紫壤、江西红壤、海南沙土、青海灰漠土和黑龙江黑土中柴油解吸行为及其影响因素. 结果表明,Trion X-100对浙江水稻土、重庆紫壤、江西红壤、海南沙土、青海灰漠土和黑龙江黑土中柴油的解吸动力学过程均符合准二级动力学模型(R2>0.99);6种典型土壤中柴油的等温解吸特征可较好地用修正的米氏方程模型描述(R2>0.94),柴油最大解吸量(Qmax)介于1.81~2.23 mg/g之间,其中浙江水稻土、重庆紫壤、江西红壤、海南沙土、青海灰漠土和黑龙江黑土中柴油最大解吸率(ρmax)分别为73.20%、78.06%、75.63%、90.36%、79.89%和62.92%;土壤砂粒含量与ρmax呈显著正相关(R2=0.9936,P<0.01),对Trion X-100解吸柴油影响最大;而阳离子交换量(CEC)、有机质含量(OM)和粘粒含量与ρmax均呈显著负相关(P<0.05). 研究结果揭示了对Trion X-100解吸柴油影响最大的土壤特征因子,为应用Trion X-100修复柴油污染土壤提供理论基础.
关键词:  Trion X-100  柴油  解吸动力学  等温解吸  土壤
DOI:
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基金项目:国家自然科学(41271476)
The Desorption Characteristics of Diesel from Soils in the Presence of Trion X-100 and the Factors Governing the Desorption
lixiaodong,xuduanping,zhangqian,mafujun,lining,wubin,guqingbao,et al
Abstract:
In order to study the desorption characteristics of diesel from soils in the presence of Trion X-100 and the factors governing the desorption, the desorption of diesel from six soils including Zhejiang paddy soil, Chongqing purple soil, Jiangxi red earth, Hainan sandy soil, Qinghai gray desert soil and Heilongjiang black soil were investigated using batch equilibration technique and the factors governing the desorption were investigated. It was demonstrated that the desorption kinetics results in Zhejiang paddy soil, Chongqing purple soil, Jiangxi red earth, Hainan sandy soil, Qinghai gray desert soil and Heilongjiang black soil can be satisfactorily described with pseudo-second model (R2>0.99). The desorption isotherms of diesel in six soils were found reasonably fitted to the modified Michaelis-Menten equation, and the maximum equilibrium desorption capacity (Qmax) ranged from 1.81 mg/g to 2.23 mg/g. The maximum equilibrium desorption efficiency (ρmax) of diesel from Zhejiang paddy soil, Chongqing purple soil, Jiangxi red earth, Hainan sandy soil, Qinghai gray desert soil and Heilongjiang black soil were 73.20%, 78.06%, 75.63%, 90.36%, 79.89% and 62.92%, respectively. The linear correlation analysis indicated that the ρmax was positively correlated with soil sand content (P<0.01), but negative correlated with CEC, OM and clay content (P<0.05). Therefore, soil sand content was the main factor that affected the desorption of diesel in the presence of Trion X-100. This results reveal the most important soil characteristic factor influencing diesel desorption, and provide meaningful information for enhanced remediation from diesel contaminated soil by Trion X-100.
Key words:  Trion X-100  diesel  desorption dynamics  desorption isotherm  soil