發(fā)布時(shí)間：2018-04-23 06:22

  本文選題：表層沉積物 + 多環(huán)芳烴��； 參考：《中國(guó)海洋大學(xué)》2009年碩士論文

【摘要】： 本文調(diào)查分析了萊州灣及日照近岸表層沉積物中PAHs的含量分布特征及污染狀況,并利用主成分分析法研究沉積物中PAHs主要污染源,為研究區(qū)域PAHs的污染控制提供理論基礎(chǔ)。通過(guò)概率風(fēng)險(xiǎn)分析法預(yù)測(cè)了萊州灣及日照近岸海域沉積物中單組分PAHs的生態(tài)風(fēng)險(xiǎn);并應(yīng)用平均可能濃度商法(M-ERM-Q)和有機(jī)碳?xì)w一化法評(píng)價(jià)研究區(qū)域沉積物中PAHs的綜合生態(tài)風(fēng)險(xiǎn),為風(fēng)險(xiǎn)管理者根據(jù)受危害的物種比例確定保護(hù)水平提供一定基礎(chǔ)數(shù)據(jù),從而保護(hù)生態(tài)環(huán)境和人體健康。 萊州灣表層沉積物中16種PAHs總量為23.03～327.53ng/g。除L02和L03站位外,其它15個(gè)站位樣品中PAHs含量特征較為相似。各站位的萘、菲、熒蒽、芘、芴、苊烯6種PAHs所占的比例超過(guò)了16種優(yōu)控PAHs總量的70%。萊州灣沉積物有機(jī)碳含量在0.41～0.90%之間;各站位顆粒組成差別較大。萊州灣PAHs含量與有機(jī)碳含量、粘粒及粉砂之間被視為無(wú)相關(guān)性。 日照近岸海域表層沉積物中PAHs總量為76.38～27512.02ng/g,除R5和R12站位外,其它10個(gè)站位樣品中PAHs含量特征較為相似。10個(gè)站位2～3環(huán)PAHs所占的比例約為16種優(yōu)控PAHs總量的70%。在R5站位,4～6環(huán)PAHs含量較高。在R12站位,2～3環(huán)PAHs占總量的57.71%。日照近岸海域沉積物有機(jī)碳含量在0.09～0.79%之間;有機(jī)碳含量在研究區(qū)域內(nèi)差異性較大。日照近岸PAHs含量與有機(jī)碳含量、粘粒及粉砂之間被視為無(wú)相關(guān)性。 應(yīng)用主成分分析法分析萊州灣及日照近岸表層沉積物中PAHs來(lái)源,結(jié)果表明萊州灣表層沉積物中PAHs的主要污染來(lái)源是燃油、燃煤、木柴燃燒和油類泄漏;三個(gè)主成分分別解釋了總方差的47.78%、20.96%和12.17%。日照近岸海域表層沉積物中PAHs的主要來(lái)源為燃油、燃煤、木柴燃燒和油類泄漏;三個(gè)主成分分別解釋了總方差的62.92%、17.69%和8.24%。 概率密度函數(shù)重疊面積和聯(lián)合概率曲線2種風(fēng)險(xiǎn)評(píng)價(jià)方法均表明萊州灣表層沉積物中9種PAHs發(fā)生生態(tài)風(fēng)險(xiǎn)的可能性比較小。就總體風(fēng)險(xiǎn)而言,芘反映出相對(duì)較大的生態(tài)風(fēng)險(xiǎn),苊烯風(fēng)險(xiǎn)最小;從少部分物種受危害的概率看,當(dāng)5%和10%的生物物種受到危害時(shí),屈超過(guò)影響邊界的概率最大。在日照近岸,概率密度函數(shù)重疊面積法和聯(lián)合概率曲線均表明芘、屈、熒蒽和菲具有較高的生態(tài)風(fēng)險(xiǎn),其中芘發(fā)生生態(tài)風(fēng)險(xiǎn)的可能性最大;芴、苊、蒽、苊烯和萘發(fā)生生態(tài)風(fēng)險(xiǎn)的可能性比較小,苊烯最小。從少部分物種受危害的概率看,屈超過(guò)影響邊界的概率最大,芘次之。除萘外,日照近岸8種PAHs的風(fēng)險(xiǎn)均大于萊州灣表層沉積物中相應(yīng)PAHs的生態(tài)風(fēng)險(xiǎn)。 MERM-Q法和有機(jī)碳?xì)w一化法均表明萊州灣表層沉積物中PAHs具有較低的綜合生態(tài)風(fēng)險(xiǎn),各站位的MERM-Q均小于0.1,表明萊州灣表層沉積物中PAHs發(fā)生綜合生態(tài)風(fēng)險(xiǎn)的可能性較低。在日照近岸海域,平均效應(yīng)區(qū)間中值商法和有機(jī)碳?xì)w一化法評(píng)價(jià)結(jié)果均顯示:R5站位表層沉積物可能存在相對(duì)較高的生態(tài)風(fēng)險(xiǎn),其它海域表層沉積物具有潛在生態(tài)風(fēng)險(xiǎn)的可能性較低;平均效應(yīng)區(qū)間中值商法評(píng)價(jià)結(jié)果顯示:R5站位表層沉積物發(fā)生毒性可能性為50%。
[Abstract]:In this paper, the distribution and pollution of PAHs in the surface sediments of Laizhou Bay and Rizhao near shore are investigated and analyzed. The main source of PAHs pollution in the sediments is studied by principal component analysis, which provides a theoretical basis for the study of the pollution control of regional PAHs. Through the probability risk analysis method, the sediment of the coastal waters of the Laizhou Bay and the sunshine near shore is predicted. The ecological risk of a medium single component PAHs, and the evaluation of the comprehensive ecological risk of PAHs in the study area by means of average possible concentration of commercial method (M-ERM-Q) and organic carbon normalization method, provide some basic data for risk managers to determine the level of protection according to the proportion of endangered species, thus protecting the ecological environment and human health.
The total amount of 16 kinds of PAHs in the surface sediments of Laizhou Bay is 23.03 ~ 327.53ng/g. except L02 and L03 stations. The contents of PAHs in the other 15 station samples are similar. The 6 PAHs of naphthalene, phenanthrene, fluoranthene, pyrene, fluorene and acenenene in each station are more than 16 kinds of 70%. Laizhou Bay sediments, and the organic carbon content is between 0.41 and 0.90%. There was a great difference in grain composition at each station. There was no correlation between PAHs content and organic carbon content, clay and silt in Laizhou Bay.
The total amount of PAHs in the surface sediments of the nearshore coastal waters is 76.38 ~ 27512.02ng/g, except for the R5 and R12 stations, and the PAHs content of the other 10 stations is similar to that of the.10 station 2~3 ring PAHs, and the proportion of 70%. at the total total of 16 PAHs is at the R5 station, and the 4~6 ring PAHs content is higher. At the R12 station, 2~3 rings occupy the total amount. The content of organic carbon in the sediments of the Rizhao coastal waters is between 0.09 and 0.79%, and the content of organic carbon in the study area is larger than that in the study area. The content of PAHs in the nearshore sunshine is not correlated with the content of organic carbon, and between the clay and silt.
The principal component analysis (PCA) was used to analyze the PAHs sources in the surface sediments of the Laizhou Bay and the Rizhao near shore. The results showed that the main sources of PAHs pollution in the surface sediments of the Laizhou bay were fuel, coal, firewood combustion and oil leakage, and the three principal components explained the total variance of 47.78%, 20.96% and 12.17%. in the surface sediments of the coastal waters of PAHs, respectively. The main sources were fuel oil, coal combustion, wood combustion and oil leakage. The three principal components explained 62.92%, 17.69% and 8.24%. of the total variance respectively.
The probability density function overlap area and the joint probability curve 2 risk assessment methods all show that the possibility of 9 PAHs ecological risks in the surface sediments of the Laizhou Bay is relatively small. As to the overall risk, pyrene reflects relatively large ecological risk, the risk of acenenene is the smallest; from the probability of species being harmed by a few species, 5% and 10% are the creatures. In the near shore, the probability density function overlap area method and the joint probability curve show that pyrene, flexion, fluoranthene and phenanthrene have high ecological risk, and the possibility of pyrene ecological risk is the greatest; the possibility of the ecological risk of fluorene, acenenacenacenene, anthracenene and naphthalene is smaller, aceneno From the probability of a few species being harmed, the probability of over affecting the boundary is the largest, and pyrene is the second. In addition to naphthalene, the risk of 8 kinds of PAHs in the nearshore sunshine is greater than the ecological risk of the corresponding PAHs in the surface sediments of the Laizhou Bay.
The MERM-Q method and the organic carbon normalization method all show that the PAHs in the surface sediments of Laizhou Bay has a low comprehensive ecological risk, and the MERM-Q of each station is less than 0.1. It shows that the possibility of PAHs comprehensive ecological risk in the surface sediments of the Laizhou Bay is lower. The results show that the surface sediments in the R5 station may have relatively high ecological risk, and the potential ecological risk of the surface sediments in other sea areas is lower. The mean effect interval middle value commercial method evaluation results show that the toxicity of surface sediments in the R5 station is 50%.

【學(xué)位授予單位】：中國(guó)海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2009
【分類號(hào)】：X55

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 吳艷陽(yáng);吳群河;羅昊;張恒軍;吳英海;張仁鐸;許振成;;沉積物中多環(huán)芳烴的生態(tài)風(fēng)險(xiǎn)評(píng)價(jià)法研究[J];環(huán)境科學(xué)學(xué)報(bào);2013年02期

相關(guān)碩士學(xué)位論文 前4條

1 陳衛(wèi)鋒;閩江福州段沉積物中多環(huán)芳烴的分布、來(lái)源及其生態(tài)風(fēng)險(xiǎn)研究[D];福建師范大學(xué);2011年

2 高錦鋒;雷州半島近海海域多環(huán)芳烴（PAHs）的分布特征、來(lái)源與風(fēng)險(xiǎn)[D];廣東海洋大學(xué);2011年

3 周華;渤海典型海域沉積物油指紋特征研究[D];中國(guó)海洋大學(xué);2012年

4 劉澍;多環(huán)芳烴水溶液的表面增強(qiáng)拉曼光譜研究[D];中國(guó)海洋大學(xué);2012年

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本文編號(hào)：1790799