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作业代写:Environmental monitoring technology

2018-09-05 来源: 51due教员组 类别: Essay范文

下面为大家整理一篇优秀的essay代写范文- Environmental monitoring technology,供大家参考学习,这篇论文讨论了环境监测技术。由于环境污染物种类繁多,毒性高等特点,对人体健康会造成巨大的威胁,同时随着人们对环境污染问题的逐渐关注,环境中污染物的检测规范和技术要求也越来越严格。总之,随着经济的不断发展和人们生活水平的不断提升,环境问题已引起了人们的广泛关注,而环境检测技术的应用,不仅可帮助我们了解现在的环境现状,还能改善生存条件提供可靠的技术指导。

Environmental monitoring,环境监测技术,essay代写,作业代写,代写

As people pay more and more attention to environmental protection, environmental detection technology plays a more and more important role in its governance. Based on this, this paper gives an overview of the application of environmental monitoring technology, focusing on the introduction of bioluminescence detection technology and sensing technology.

Due to the wide variety of environmental pollutants, complex matrix, high toxicity, long time exposure and easy bioaccumulation, the health of human will be greatly threatened. At the same time, as people pay more and more attention to environmental pollution, the detection standards and technical requirements for pollutants in the environment are increasingly strict. Therefore, it is of great importance to strengthen the application of the technology to ensure the effective implementation of the testing work and to improve the testing level.

Role in urban environmental planning; In the process of socialized production, the development of economic and environmental protection is a unified relationship, emphasizing that economic and environmental construction should be carried out "three synchronization", that is, synchronous planning, synchronous implementation and synchronous development. Secondly, to do a good job in urban environmental planning, we must make a scientific and reasonable assessment of the current situation of urban environment, and scientific environmental assessment comes from practical and reliable environmental monitoring. Function in social goods; Social goods are circulated and used in the whole society. The quality of products should be measured from the impact on people and the environment, such as the emission of harmful waste gas indicators of motor vehicles and noise indicators of household appliances such as refrigerators. Role in scientific research; The progress of science and technology is the first condition of social and economic development, and some scientific studies usually in environmental monitoring as arguments, such as natural resources investigation of environmental background investigation, environmental monitoring and pollution source investigation, etc., in the study of environmental capacity to do these aspects of environmental monitoring, to promote scientific research and development of the economy has a great significance.

In the natural environment, some bacteria, fungi, and insects and other creatures with luminescence properties, and its all belong to and gram-negative anaerobic bacterium, can exercise, so can choose emission fluorescence characteristics in environmental detection of bacteria as indicator bacteria, but due to the intensity of fluorescence emission will be affected by heavy metals in the soil, the intensity of fluorescence emission can be as indicators of environmental detection, for mixed poisons in the soil, heavy metals such as camphor ball monitoring work. Secondly, it has been proved in practice that bioluminescence detection technology is applied in environmental detection, and fluorescence bacteria is used as sensitive material, which has high sensitivity, intuitive and rapid detection and can be combined with biosensor technology and computer technology. In the future, its detection range in environmental detection will be expanded.

The main role of biological enzyme technology is to detect pesticides in environmental pollutants, and toxic pollutants such as heavy metals, which endanger human and animal health. The two most commonly used methods are biological enzyme inhibition technology and enzyme immunoassay technology. Among them, the principle of enzyme inhibition technology is the use of toxic pollutants such as pesticides or heavy metal, of a specific enzyme inhibition, and then by joining the substrate of the enzyme catalytic chromogenic agent whether the degree of color and color rendering, whether of enzyme inhibition reaction happened and inhibit the reaction degree of judgment, and monitoring to detect the existence of environmental pollutants and size and existing content. Is another kind of enzyme immunoassay technology, it is a kind of composite enzyme technology and the new technology of immune technology, is nearly period of time before the rise of a more applicable in environmental detection technology, its work principle is mainly by reference to the specificity of the reaction between antigen and antibody, and about the existence of pollutants to detailed judgment is made. In general, environmental pollutants will be used as antigens in the application, and then specific antibodies will be obtained through the immune animals, so that the antibodies and antigens will conduct specific reactions in the animal in vitro, so as to make the most basic judgment of the components to be tested in the pollutants.

PRC technology refers to polymerase chain reaction, which can synthesize specific DNA fragments in vitro to achieve the function of expanding gene DNA and RNA fragments, and is the development and extension of cloning technology. As the enzyme used in PCR has high temperature resistance, its specificity is strong. Secondly, the application of PRC technology in environmental detection is shown in the following three aspects: the PRC technology gradually replaces the traditional isolation and culture detection method, and can accurately detect harmful organisms and pathogenic bacteria in the external environment, thus improving the efficiency of environmental detection; Because of the high sensitivity of the PCR technique, microbial pathogens can be detected even in very low concentrations of water. At the same time, the technique is more standard than traditional detection methods and has higher sensitivity. The results of PCR detection can provide reliable basis for the evaluation of water quality, and after continuous development and improvement, PCR technology is likely to replace the existing detection methods of water bacteriology with its unique advantages.

Electrochemical sensor is affected by pressure variation is small, but the pressure difference can damage the sensor in the sensor, so the pressure balance is the precondition of normal work of the sensor, and electrochemical sensor is sensitive to temperature, temperature above 25 ℃, reading is higher, and less than 25 ℃, low readings. Secondly electrochemical sensor is to use react with gas under test, and then according to the electrical and gas concentration determination of relationship between the ratio of the gas content, the typical electrochemical sensor main components including breathable membrane, electrode, electrolyte and filters, at the same time, more common a humidity sensor, nitrogen oxide sensors, sulfide gas sensor, etc., among them, the coated with piezoelectric quartz crystal sensor is relatively commonly used humidity measurement instrument, the instrument by photosynthetic chemical technology can be made into a small quartz from transistors, then four kinds of high moisture sensitivity of material coated on the quartz crystal, due to the vibration frequency and change along with the change of quality, The relative humidity of different gases can be measured by choosing different coatings. Such as sulfur dioxide is the main reason for the formation of acid rain, it is also one of the main cause of air pollution, so the use of sulfur dioxide sensor detection, can reduce the testing time, improve the detection accuracy, in the test, the ion exchange membrane should be solid polymer, and one side of the membrane should contain internal electrolyte on the electrode and reference electrode, insert the platinum electrode, on the other side to form sulfur dioxide sensor.

In the actual environmental detection, the liquid sensor is more widely used than the gas sensor because of the wide range of pollutants in the water environment. For example, pesticides are a special kind of chemical, which can not only control the diseases and insect pests in agriculture and forestry, but also cause serious harm to people and animals. Therefore, the use of cobalt-benzodiazepine dye and galvanometer can facilitate the detection of triazine herbicides without deoxidation. Second with the infrared spectrum of the fiber sensor, can also be used for rapid detection of pesticide, specific optical fiber lining can be coated after non-polar organic modified aerosol material, can significantly improve the water in the fiber molecular dissipation function of the signal, and the ability to extract solution of organophosphorus pesticides for spectral analysis. In addition, the pollution of hormone molecules and their metabolites often leads to abnormal growth, development and reproduction of organisms. This technique requires no sample pretreatment and can be directly tested for hormones in natural water bodies in different regions.

In conclusion, with the continuous development of economy and the continuous improvement of people's living standards, environmental problems have attracted wide attention of the whole society. The application of environmental detection technology can not only help us understand the current environmental situation, but also provide reliable technical guidance for improving living conditions. Therefore, with the continuous development of science and technology, the environmental detection technology should be constantly optimized to establish rapid, efficient, environmentally friendly and accurate environmental indicators.

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