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Simple and efficient dual-wavelength spectroscopy for the determination of organic matter in sewage sludge from wastewater treatment

机译：废水处理中污水污泥有机质测定的简便高效的双波长光谱

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摘要

In this study, a dual-wavelength spectroscopic method for rapid determination of organic matter in sludge was developed. The contents of the organic matter were calculated by determining the consumption of potassium dichromate (K2Cr2O7) based on the production of trivalent chromium ions (Cr3+). Cr3+ could be determined by subtracting the absorption at 800 nm (spectral interference) from the absorption at 650 nm (only contributed by Cr3+). The results showed that the relative standard deviation in the test was less than 5%. The same set of samples was used and when the content of organic matter was more than 150 g kg(-1), the relative difference between the spectroscopic method and titration method was within 1%. Furthermore, the method does not require calibration based on the standard samples. In conclusion, the present method is simple, reliable, accurate and suitable for application in mass testing for sludge samples.
机译：在该研究中，开发了一种用于快速测定污泥中有机物质的双波长光谱法。 通过基于三价铬离子的产生（Cr3 +）来确定二色素（K2Cr2O7）的消耗来计算有机物的含量。 通过从650nm的吸收中减去800nm（光谱干扰）的吸收来确定CR3 +（仅贡献CR3 +）。 结果表明，试验中的相对标准偏差小于5％。 使用相同的样品并在有机物质的含量大于150g kg（-1）时，光谱法和滴定法之间的相对差异在1％以内。 此外，该方法不需要基于标准样品校准。 总之，本方法简单，可靠，准确，适用于污泥样品的质量检测中的应用。

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  • 来源
    《RSC Advances》 |2019年第22期|共5页
  • 作者

    Tu Xiaojie; Hu Zhanbo; Chai Xin-Sheng; Su Yuting;

  • 作者单位

    Guangxi Univ Coll Forestry Nanning Peoples R China;

    Guangxi Univ Sch Resources Environm &

    Mat Nanning Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou Guangdong Peoples R China;

    Guangxi Univ Sch Resources Environm &

    Mat Nanning Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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