强化生物通风修复柴油污染土壤影响因素的正交实验  

Orthogonal Analysis of the Influencing Factors During Remediating Diesel Contaminated Soil by Enhancing Bioventing

作　　者：王春艳[1] 陈鸿汉[1] 杨金凤[1] 刘菲[1] 

机构地区：[1]中国地质大学(北京)水资源与环境工程北京市重点实验室,北京100083

出　　处：《农业环境科学学报》2009年第7期1422-1426,共5页Journal of Agro-Environment Science

基　　金：科技部国际科技合作项目(2006DFA21180);教育部博士点基金资助

摘　　要：生物通风是继SVE后又一项主要的生物修复技术,在石油污染土壤修复中拥有广阔的前景。为寻求最佳修复效果的最优组合,采用生物通风修复柴油污染土壤的正交土柱实验,对影响生物通风修复效果的5个主要因素(污染强度、土壤含水率、C∶N∶P、通风的孔隙体积数、通风方式)进行了定量化。结果表明,利用强化生物通风可以在柴油污染土壤的治理中取得较好的效果;方差分析各因素均无显著性影响;极差分析得到影响强化生物通风柴油去除效果的最主要因素为土壤含水率、污染强度,次主要因素为C∶N∶P、通风的孔隙体积数,而通风方式对去除率的影响很小;在实验的不同阶段有些因素的最优水平有不同程度的改变,总体来说各因素的最佳水平分别为:土壤含水率为4.88%,污染强度为40000mg·kg-1,C∶N∶P为100∶20∶1,通风的孔隙体积数为4,而通风方式的两种水平对去除率的影响相差不大。Bioventing, as another technology developed from Soil Vapor Extraction（SVE ）, is potential for remediating soil contaminated by petroleum. This paper presents results of bioventing experiment about influence factors such as contamination intensity, venting mode, pore volume number during soil venting, the ratio of carbon, nitrogen and phosphate, soil water content. These factors were analyzed orthogonally to seek the optimal combination that could achieve the maximum removal rate. Diesel contaminated soil could be effectively remediated by enhancing bioventing and the maximum removal rate could reach 63.89%. The range analysis and variance analysis were applied to the assessment of results. The result of range analysis showed the order of these effect factors were soil water content, contamination intensity, the ratio of carbon, nitrogen and phosphate, pore volume number during soil venting, and venting mode, but the result of variance analysis showed that all factors had no significant effect on removal. The optimal levels of some factors were changed at different stages, respectively. In general, the optimal levels of soil water content was 4.88%, contamination intensity was 40 000 mg oil ·kg^-1 soil, the ratio of carbon, nitrogen and phosphate was 100：20：1, pore volume number was during soil venting But the two levels of venting mode had little effect on removal rate.

关 键 词：柴油 生物通风 影响因素 正交实验 

分 类 号：X53[环境科学与工程—环境工程]