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  本文關(guān)鍵詞：底棲溶解二氧化碳觀測的平面光極研制　出處：《中國海洋大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 溶解二氧化碳 平面光極 高分子包埋

【摘要】：二氧化碳CO2(Carbon Dioxide, CO2)是海洋中重要的溶解氣體之一，它在海洋生物地球化學(xué)循環(huán)、沉積的早期成巖作用和海洋生態(tài)系統(tǒng)環(huán)境演化作用中都扮演著極其重要的角色。沉積物-海水界面的溶解二氧化碳變化量的觀測對于底棲生物的生物活動以及海底成礦作用具有重要影響，但是由于缺乏合適的探測手段，人類對于沉積物-海水界面溶解二氧化碳的動態(tài)變化過程缺少精確的數(shù)據(jù)資料，進(jìn)而影響了通過海底-水界面二氧化碳的變化對全球變化進(jìn)行充分的認(rèn)識。 本文對目前國內(nèi)外溶解二氧化碳的海洋原位傳感技術(shù)進(jìn)行了評述，針對目前原位溶解二氧化碳兩維空間變化監(jiān)測方面使用主要方法所存在的不足，進(jìn)行了平面二氧化碳光極的探索研究，利用物理包埋的方法將熒光指示劑HPTS（8-羥基芘-1,3,6-三磺酸三鈉鹽）包埋在聚甲基丙烯酸羥乙酯-co-乙二醇二乙酸酯高分子膜框架中，通過在碳酸氫鈉緩沖溶液中浸泡、然后采用硅膜封裝等工藝制備成溶解二氧化碳平面?zhèn)鞲心�。在�?shí)驗(yàn)室內(nèi)對平面?zhèn)鞲心さ男阅苓M(jìn)行了評估實(shí)驗(yàn)，實(shí)驗(yàn)結(jié)果表明所制備平面光極與溶解二氧化碳含量具有良好的相關(guān)性，測量響應(yīng)時(shí)間約為2-3分鐘，顯示出良好的重復(fù)性和精度，在0°C-30°C溫度變化范圍內(nèi)具有良好的穩(wěn)定性。利用所制備的傳感膜，結(jié)合工業(yè)數(shù)字相機(jī)對構(gòu)建了底棲溶解二氧化碳原位觀測實(shí)驗(yàn)系統(tǒng)，進(jìn)行了沉積物中溢出二氧化碳?xì)怏w的泄露模擬觀測試驗(yàn)，，驗(yàn)證了平面光極在溶解二氧化碳動態(tài)變化過程監(jiān)測應(yīng)用的可行性。
[Abstract]:Carbon dioxide CO2(Carbon dioxide (CO2) is one of the most important dissolved gases in the ocean, which plays an important role in the marine geochemical cycle. The early diagenesis of sediments and the environmental evolution of marine ecosystems play an extremely important role. The observation of the amount of dissolved carbon dioxide at the sediment-seawater interface is of great importance to benthos and the sea. The bottom mineralization has important influence. However, due to the lack of appropriate means of detection, there is a lack of accurate data on the dynamic process of dissolved carbon dioxide in the sediment-seawater interface. It also affects the understanding of the global change through the change of carbon dioxide at the bottom-water interface. In this paper, the ocean in-situ sensing technology of dissolved carbon dioxide at home and abroad is reviewed, and the shortcomings of the main methods in monitoring the two-dimensional spatial variation of dissolved carbon dioxide in situ are pointed out. The planar carbon dioxide photoelectrode was studied, and the fluorescence indicator HPTS- 8-hydroxypyrene-1 (HPTS- 1 + 3) was studied by means of physical entrapment. 6-trisulfonic acid trisodium salt) was embedded in the framework of poly (hydroxyethyl methacrylate) -co- (ethylene glycol) diacetate polymer membrane and soaked in sodium bicarbonate buffer solution. Then the dissolved carbon dioxide planar sensing film was prepared by silicon film encapsulation and the performance of the planar sensing film was evaluated in the laboratory. The experimental results show that the planar photoelectrode has a good correlation with the content of dissolved carbon dioxide, and the response time is about 2-3 minutes, showing good repeatability and accuracy. It has good stability in the temperature range of 0 擄C-30 擄C. an in situ observation system of dissolved carbon dioxide in benthos has been constructed by using the sensing film and the industrial digital camera. A simulated observation of the leakage of carbon dioxide in sediments was carried out to verify the feasibility of the application of the planar photopolar monitoring in the process of dynamic change of dissolved carbon dioxide.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P714.4

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