探究土壤中萘提取液的浓缩方法比较

随着科学技术的发展,工业产品越来越丰富。工业工艺过程、缺氧燃烧、垃圾焚烧和填埋等生产活动,产生了大量的多环芳烃物质。这些物质通过复杂的物理迁移、化学及生物转化反应,进入土壤,严重污染环境,给人类及其生物的安全带来严重危害。如何快速、准确检测土壤中多环芳烃的含量,成为治理污染等相应策略实施的首要条件。当前测定土壤中多环芳烃的前处理方法有加压流体萃取、索式萃取、超声波萃取、微波萃取等。在这些成熟萃取手段中,浓缩又是一个关键步骤。目前浓缩的手段有KD浓缩、氮吹浓缩、旋转蒸发浓缩、旋转与氮吹合用浓缩。本文对四种浓缩手段对多环芳烃中的萘提取液进行浓缩分析比较,并获得了一定结论,望给行业内提供有效的参考意见。

Comparison of concentration methods of naphthalene extraction solution in soil

With the development of science and technology,industrial products are more and more various.Industrial process,anoxic combustion,waste incineration,landfill and other production activities produce a quantity of polycyclic aromatic hydrocarbons.These substances would percolate through the soil by complex physical migration and chemical and biological reactions,which seriously pollute the environment and bring serious harm to human security and biosafety.Detecting the content of PAHs in soil quickly and accurately has become the prime condition for the implementation of pollution control strategies.At present,the preparation methods for determination of PAHs in soil include pressurized fluid extraction,cable extraction,ultrasonic extraction and microwave extraction.And concentration is a critical process in these extraction methods.By now,the methods of concentration include KD concentration,nitrogen blowing concentration,rotary evaporation concentration,and combination of rotary and nitrogen blowing concentration.In this paper,these four concentration methods used to concentrate and analyze the naphthalene extract from PAHs are compared,and some results are obtained,which may provide some effective reference for the industry.