Research device for generating singlet oxygen through natural organic matter, and control method of research device

Abstract

The invention discloses a research device for generating singlet oxygen through a natural organic matter, and a control method of the research device. The research device comprises a light source device, a multi-flux reaction cup, a cold trap, a full-automatic constant-flow pump sampling device, a fraction collector and a constant-temperature circulating water device, wherein light emitted by the light source device is vertically irradiated to the multi-flux reaction cup; the multi-flux reaction cup is placed in the cold trap; the cold trap is connected to the constant-temperature circulating water device through a condensed water pipeline; the multi-flux reaction cup is connected to the full-automatic constant-flow pump sampling device through a sampling pipeline; the full-automatic constant-flow pump sampling device is connected to the fraction collector through the sampling pipeline. According to the research device, research on generation of active oxygen through the natural organic matter according to factors such as the intensity and property of a light source, the temperature, the potential of hydrogen and the oxygen flux is realized, so that a mechanism for generating the active oxygen through the natural organic matter is comprehensively known, and an important application value is provided for research on generation of the active oxygen through an organic matter for degradation of a persistent organic pollutant and research on a relationship between the active oxygen and the property of the organic matter.

Description

technical field [0001] The invention relates to the field of environmental photochemistry, in particular to a research device for generating singlet oxygen from natural organic matter and a control method thereof. Background technique [0002] Natural organic matter (NOM) widely exists in natural water bodies and participates in a variety of environment-related reactions. NOM plays an important role in the photolysis process of organic pollutants, and affects the environmental behavior and ecological risk of organic pollutants. NOM (especially humic acid) contains chromophores and is an important natural photosensitizer, which absorbs light energy and converts it into an excited triplet state ( 3 NOM*), and then trigger a series of reactions to generate reactive oxygen species (ROS), such as hydroxyl radicals ( OH), singlet oxygen ( 1 o 2 ) and oxygen anions (O 2 - ), etc., to induce photochemical degradation of organic pollutants. At the same time, NOM will also compe...

AI Technical Summary

Problems solved by technology

[0003] NOM acts as a photosensitizer to generate singlet oxygen ( 1 o 2 ) research methods and applications have been reported in large numbers. At present, the international research devices for NOM to produce singlet oxygen only have the control of a single condition, such as the literature [Cory R M, Cotner J B, McNeill K. Quantifying interactions between singlet oxygen and aquatic fulvic acids[J].Environmental Science&Technology, 2008, 43(3):718-723】The design of the singlet oxygen generation device can realize the automatic sampling of the constant flow pump according to the time, but only a single sample can be realized at a time The collection of literature [Peterson B M, McNally A M, Cory R M, et al.Spatial and Temporal Distribution of Singlet Oxygen in Lake Superior[J]. Environmental Science & Technology, 2012, 46(13): 7222-7229] provides the device as The patented product of a certain company is designed with the light source at the center of the disk and the samples around the disk. During the experiment, the sample rotates with the disk, which can ensure the uniformity of the light source, but the temperature control and taking one sample each time The measurement makes the total amount of samples more demanding; there are almost no domestic reports on the method and device for generating singlet oxygen from natural organic matter, and there are only patents related to singlet oxygen generating devices in the Chinese patent database [Jörg Kleim .Method and device for preparing singlet oxygen. China, CN01816455.2[P].2004-01-07] also applied for foreigners. This patent can only realize the basic generation of singlet oxygen, and the medium produced is pigment coating , cannot be used to study the occurrence of singlet oxygen from organic matter

None of the above research devices use xenon lamp light source, which cannot simulate the generation of singlet oxygen in dissolved organic matter under sunlight conditions, and cannot realize the functions of adjusting light source intensity, changing light source type, adjusting temperature and controlling dissolved oxygen at the same time

Images