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Determination method for reaction rate constants of typical organic substances in water degraded by uv/h2o2

A technology of reaction rate constants and determination methods, applied in water pollutants, chemical method analysis, water/sewage treatment, etc., can solve problems such as degradation of unfavorable trace organic matter

Active Publication Date: 2019-06-25
SHANDONG WATER & WASTEWATER MONITORING CENT
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Problems solved by technology

In actual water, NOM, inorganic carbon (IC), SO 4 2- , NO 3- Inorganic ions, etc. have great influence, which is not conducive to the degradation of trace organic matter

Method used

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  • Determination method for reaction rate constants of typical organic substances in water degraded by uv/h2o2
  • Determination method for reaction rate constants of typical organic substances in water degraded by uv/h2o2
  • Determination method for reaction rate constants of typical organic substances in water degraded by uv/h2o2

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Embodiment Construction

[0032] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0033] Assay method of the present invention, comprises the steps:

[0034] (1) Using matching UV / H 2 o 2 Advanced Oxidation Unit conducts static experiments; first measures UV / H in actual water 2 o 2 UV degradation 254 The kinetic constant of the first order reaction, its correlation coefficient r≮0.95; secondly, with nitrobenzene NB as a reference, UV 254 and the first-order reaction kinetic constants of NB, using the competitive kinetic method to determine UV in actual water 254 Second-order reaction kinetic constants for degradation; UV was again determined using actual water spikes 254 and the first-order reaction kinetic constants of typical organic compounds, the correlation coefficient r≮0.95; finally to measure the UV in the actual water 254 For reference, the second-order reaction kinetic constants of typical organic compounds were...

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Abstract

The invention discloses a method for measuring a reaction rate constant of a typical organic matter in UV / H2O2 degradable water. The method comprises the following steps: (1) carrying out a static experiment by adopting a complete UV / H2O2 advanced oxidation device; (2) taking the complete UV / H2O2 advanced oxidation device as a static experiment device; (3) measuring a first-order reaction kinetic constant of UV / H2O2 degradable UV254 in actual water; (4) measuring a second-order reaction kinetic constant of degradable UV254 in the actual water; (5) establishing a competitive kinetic model; (6) measuring first-order reaction kinetic constants rUV and r of the UV254 and a typical organic matter C in the actual water; and (7) measuring a second-order reaction kinetic constant of the typical organic matter. According to the method disclosed by the invention, the influences of NOM, inorganic ions and the like in the actual water on degradation rates of typical trace organic substances are quantified, and a theoretical support and a process parameter design basis are provided for actual application of a UV / H2O2 advanced oxidation process.

Description

technical field [0001] The invention relates to a method for measuring UV / H in actual water by means of competitive kinetics. 2 o 2 The method of system reaction rate constant, especially for trace refractory organic substances such as odorant substances and endocrine disruptors. Background technique [0002] UV / H 2 o 2 The advanced oxidation process is a water treatment technology that makes full use of the activity of hydroxyl radicals (OH) to quickly and completely oxidize organic pollutants. Traces of refractory organic substances such as o-dichlorobenzene, dimethyl phthalate, and bisphenol A have good removal effects, and most of these substances are at the ng or μg level. [0003] The actual water contains a large amount of natural organic matter (NOM) such as humic acid and fulvic acid. The functional groups in the macromolecules mainly include: aromatic acid, phenol, aromatic dicarboxylic acid, fatty acid, hydroxy acid, aliphatic dicarboxylic acid, etc. It is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/75G01N21/33G01N31/00C02F1/32C02F1/72C02F101/30
CPCC02F1/32C02F1/722C02F2101/30C02F2101/305C02F2305/023G01N21/33G01N21/75G01N31/005G01N2021/751
Inventor 贾瑞宝宋武昌孙韶华冯桂学
Owner SHANDONG WATER & WASTEWATER MONITORING CENT
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