化工专业毕业论文摘要翻译

来源：百度知道 编辑：UC知道 时间：2024/07/02 17:09:45
化学器氧量(COD)，是指在一定条件下，用强氧化剂处理水样时所消耗氧化剂的量，以氧的mg／L来表示。化学需氧量反映了水中受还原性物质污染的程度。水被有机物污染是很普遍的，因此化学需氧量也作为有机物相对含量的指标之一。
化学需氧量的测定方法分为重铬酸钾法和高锰酸钾法，目前我国在污染源监测中采用重铬酸钾法(COD~)为统一监测方法(以下简称标准法)，其基本原理是在强酸性溶液中，用一定量的重铬酸钾将水样中还原性物质(主要是有机物)氧化，过量的重铬酸钾以试亚铁灵做指示剂，用硫酸亚铁铵回滴，根据消耗的用量算出水中还原性物质消耗氧的量。此法具有可靠性高，重现性好等优点，为
了使氧化完全，标准方法需加热回流2h，对于那些及时需要数据和大批样品测定，就会受到测定时间和所需装置的限制。CODcr 快速测定法是Fefis提出的，其基本原理与标准法相同，本文所介绍的快速法是用硫酸做介质，使用250ml回流装置，使之提高反应温度和反应溶液的酸度，缩短回流时闻，提高分析效率．通过实验和实测，证明该法与标准法不存在显著性差异，无系统误差存在。
论文就差论文翻译了，拜托各位啦，真的很急啊
不要翻译软件，拜托高手帮帮忙啦~

Chemical oxygen demand (COD), it is to point to in certain conditions, with strong oxidant treatments in water consumed by the amount of antioxidant, oxygen mg/L. Chemical oxygen demand (cod) reflects the water by reducing the pollution. Water is organic pollution is very common, thus chemical oxygen demand (cod) as well as the indexes of the relative contents of organic compounds.
The determination of COD methods are classified into dichromate method and potassium permanganate method at present, pollution monitoring using dichromate method (COD) unified monitoring methods for (hereinafter referred to as the standard method), its basic principle in strong acid solution, with a certain amount of dichromate in water reducing (will) oxidation, organic matter is mainly the excessive dichromate try to do, use spirit ferrous ammonium sulfate, according to the dosage of the water consumption is reducing the amount of oxygen consumption. This has high reliability and repeatability, etc