Method for detecting unsaturated fatty acid in papermaking wastewater
A technology for unsaturated fatty acids and papermaking wastewater, which is applied in measurement devices, preparation of test samples, instruments, etc., can solve the problems of reducing the accuracy of results, large errors in detection values, and complicated operation processes, and achieves an increase in the relative contact area. , reducing errors, and the effect of simple operation
Active Publication Date: 2019-08-30
DONGGUAN UNIV OF TECH
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[0003] However, due to the high content of organic matter in wastewater from paper mills, the high content of suspended solids in the water body, the poor chromaticity of the water quality, and the fact that wood pulp wastewater, colloids, and dyeing agents are mostly fused in the water body, it is difficult to detect, and many paper mills cannot accurately detect C 18 for accurate determination; the existing pair of C 18 The detection of most of them adopts the method of liquid chromatography, but this method can only be used for the higher purity C 18 Determination, the detection accuracy is poor, and the operation process is complicated, which is not conducive to real-time monitoring of C in wastewater. 18 If the Raman spectrum is used to detect unsaturated fatty acids, the impurities in the sample will absorb and disperse the light, reducing the accuracy of the results. At the same time, due to the weak Raman scattering light intensity, direct detection of C 18 The error of the detection value is large, which is not conducive to the detection of C 18 Determination of
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[0059] The present invention will be further described below by means of drawings and embodiments.
[0060] C 18 It mainly contains oleic acid, linoleic acid, linolenic acid and other substances, which are the main toxic and harmful substances in unsaturated fatty acids in papermaking wastewater. Due to the high content of organic, inorganic and toxic and harmful substances in papermaking wastewater, it is difficult to detect C in papermaking wastewater. 18 Before the concentration is determined, a series of treatments are required for the wastewater to avoid the influence of pollutants on the detection value.
[0061] Oleic acid, linoleic acid, linolenic acid structure:
[0062]
[0063] Then, the present invention provides a kind of detection method of papermaking wastewater, this method first takes wastewater testing sample at the outlet of paper mill, when sampling, first will carry out pre-washing to sampling bottle by wastewater, sample 1000ml after three times of pr...
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Abstract
The invention provides a method for detecting unsaturated fatty acid in papermaking wastewater. The method for detecting unsaturated fatty acid in papermaking wastewater includes the steps of sampling, filtering, adjusting the PH value, molecular distillation, concentration, silver nitrate complexation, establishing Raman spectroscopy standard curve, and analyzing the result. The Raman spectrum can be surface-enhanced by the silver nitrate complexation process disclosed in the invention, so that the detection accuracy is further improved. The method for detecting unsaturated fatty acid in papermaking wastewater has the advantages of high recovery efficiency of C<18>, accurate measurement, simple operation and low detection cost, and can effectively solve the technical problems that the detection precision of the equipment is poor, the recovery efficiency is low, the C<18> content in the wastewater cannot be accurately determined, and the like.
Description
technical field [0001] The invention relates to a detection method for water treatment, in particular to a detection method for unsaturated fatty acids in papermaking wastewater. Background technique [0002] In my country's industrial field, due to the different content of wastewater pollutants produced by different industries, the focus of industrial wastewater treatment and testing in different industries is also different. Among all kinds of industrial wastewater, the wastewater pollutants produced by paper mills are the most complex, and have always been the focus of environmental protection monitoring. Unsaturated fatty acids in papermaking wastewater are an important indicator of papermaking pollutants. Its content can reflect the toxicity and The content of organic matter in water body, C in unsaturated fatty acids 18 Is the main source of toxicity of papermaking wastewater, C 18 Mainly including oleic acid, linolenic acid and linoleic acid, on C 18 The detection ...
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IPC IPC(8): G01N21/65G01N1/28G01N1/34G01N1/40G01N1/38
CPCG01N1/28G01N1/34G01N1/38G01N1/4022G01N21/658G01N2001/4027
Inventor 罗鸿斌
Owner DONGGUAN UNIV OF TECH