编辑: 此身滑稽 | 2015-12-23 |
30?No.11 Nov.?2017 收稿日期: 2017~04~05 修订日期: 2017~08~17 基金项目: 国家自然科学基金项目(41571481?41403100) 作者简介: 丛鑫(1976~)?女?辽宁阜新人?副教授?博士?主要从事土壤环 境化学研究?congxin1800@ 163.com. ?责任作者?杨兵(1976~)?男?湖北荆州人?副研究员?博士?主要从事区 域土壤风险评估与修复研究?yangbing@ craes.org.cn 丛鑫?姜久宁?刘寒冰?等.堆肥化处理 TNT 红水污染土壤[J].环境科学研究?2017?30(11):1732~1738. CONG Xin?JIANG Jiuning?LIU Hanbing?et al.Composting soils contaminated by TNT red water[J].Research of Environmental Sciences?2017?30(11): 1732~1738. 堆肥化处理 TNT 红水污染土壤 丛鑫1?2 ? 姜久宁1?2 ? 刘寒冰2 ? 杨兵2? ? 薛南冬2 1.辽宁工程技术大学环境科学与工程学院? 辽宁 阜新
123000 2.中国环境科学研究院?环境基准与风险评估国家重点实验室? 北京
100012 摘要: DNTS〔二硝基甲苯磺酸盐?主要包括 2?4~DNT~3~SO3 - (2?4~二硝基甲苯~3~磺酸盐)和2?4~DNT~5~SO3 - (2?4~二硝基甲苯~5~ 磺酸盐〕是TNT(2?4?6~三硝基甲苯)红水污染土壤中主要污染物质?为研究堆肥化对土壤中 DNTS 的降解效果?采用有机废物堆 肥方法?探讨堆肥化对 TNT 红水污染土壤中 DNTS 降解的可行性?以及温度、含水率和 pH 变化对降解效果的影响. 结果表明?有 机废物堆肥能处理 TNT 红水污染土壤?在堆肥
60 d 内?5 个堆肥体系(猪粪+木屑、猪粪+麦壳、污泥+木屑、污泥+麦壳和马粪+木屑)对2?4~DNT~3~SO3 - 的降解率为 65? 5% ~88? 4%?对2?4~DNT~5~SO3 - 的降解率为 60? 9% ~100%. 在第
4 天各堆肥体系的高温阶 段(29? 7~53?
6 ℃ )?5 个堆肥化体系中 2?4~DNT~3~SO3 - 总量的 49? 5% ~ 67? 3%被降解?说明各堆体的中温~高温阶段对有机物的 降解起重要作用. 堆体含水率随堆肥时间的延长呈下降趋势?在堆肥第
8 天?外源补水至体系含水率为 50%?猪粪+麦壳体系对 2?4~DNT~3~SO3 - 的降解率从 70? 2%增至 88? 4%?说明适当的外源补水可提高 2?4~DNT~3~SO3 - 的降解率.
5 个堆肥体系中 pH 均呈 初期上升、后期下降并趋于稳定的趋势?但在整个堆肥过程中?堆体 pH 始终保持在 7? 3~ 8?
3 之间. 研究显示?5 个堆肥体系中猪 粪+麦壳体系对 DNTS 的降解率最高?分别为 88? 4%和100%. 关键词: 堆肥? TNT 红水? 土壤? DNTS 中图分类号: X53 文章编号: 1001~6929(2017)11~1732~07 文献标志码: A DOI: 10? 13198Mj? issn? 1001~6929? 2017? 03?
22 Composting Soils Contaminated by TNT Red Water CONG Xin1?2 ? JIANG Jiuning1?2 ? LIU Hanbing2 ? YANG Bing2? ? XUE Nandong2 1.College of Environmental Science and Engineering? Liaoning Technical University? Fuxin 123000? China 2.State Key Laboratory of Environmental Criteria and Risk Assessment? Chinese Research Academy of Environmental Sciences? Beijing 100012? China Abstract:Dinitrotoluenesulfonates (2?4~dinitrotoluene~3~sulfonate and 2?4~dinitrotoluene~5~sulfonate) are the main pollutants of soils contaminated by TNT red water from explosives factories. The present study assessed the effectiveness of composting with organic waste to degrade dinitrotoluenesulfonates? as well as the effects of the changes in moisture? temperature and pH during the composting process. The obtained results revealed that the degradation rates in five composting systems (i.e.? pig manure+sawdust? pig manure+rice chaff? sewage sludge+sawdust? sewage sludge + rice chaff? and horse manure + sawdust) were 65? 5%~88? 4% for 2?4~dinitrotoluene~3~sulfonate and 60? 9%~100% for 2?4~dinitrotoluene~5~sulfonate during the 60~day composting. More than 49? 5% of dinitrotoluenesulfonates were degraded in the thermophilic period (29? 7~53?