a国产,中文字幕久久波多野结衣AV,欧美粗大猛烈老熟妇,女人av天堂

新型溴代阻燃劑在黃河三角洲濕地沉積物中的分布及儲量分析研究

發(fā)布時間:2018-12-08 16:18
【摘要】:隨著持久性有機污染物的大量使用,環(huán)境問題變的越來越嚴重。一些國家和國際組織開始禁止或者限制它們的生產(chǎn)和使用,例如:多溴聯(lián)苯醚(PBDEs)和多氯聯(lián)苯(PCBs)。然而,一些新型的溴代阻燃劑(BFRs)開始出現(xiàn),例如:三(2,3二溴丙基)異氰脲酸酯(TBC)、六溴環(huán)十二烷(HBCDs)、四溴雙酚A(TBBPA),它們被大量應(yīng)用于石油化工業(yè)、機械制造業(yè)、電子電器產(chǎn)品制造業(yè)中,研究表明它們具有類似于持久性有機污染物(POPs)的性質(zhì),并廣泛分布于環(huán)境中。本文以黃河三角洲濕地為環(huán)境模型,研究該濕地沉積物中TBC和HBCDs的污染水平、組成特征、與TOC之間相關(guān)性、儲量估計以及暴露風險等。論文的主要內(nèi)容與結(jié)論如下:1.本實驗優(yōu)化了TBC和HBCDs前處理及分析檢測方法,對樣品進行冷凍干燥、索氏提取、過復合硅膠層析柱、旋轉(zhuǎn)蒸發(fā)及氮吹濃縮,最后進UPLC-MS-MS分離檢測。為保證實驗精確度,進行樣品加標回收實驗,所有樣品中均加入同位素標記的[13C12]-α-、β-、γ-HBCD作為回收率內(nèi)標,回收率分別為88 102%、93 107%、83 98%,相對標準偏差(RSD)的范圍是4.73 9.11%。2.實驗結(jié)果表明:TBC的檢出率為100%,含量在0.20-29.03 ng·g-1之間,平均含量為6.88 ng·g-1;α-、β-、γ-HBCD的檢出率分別為75%、71%、96%,平均含量分別為0.69 ng·g-1、0.42 ng·g-1、5.20 ng·g-1;α-、β-、γ-HBCD所占的比例分別為10.1%(5.7 17.0%)、6.1%(3.0 12.1%)、83.8%(73.2 100.0%)。3.黃河口處采樣點HBCDs平均含量(10.46 ng·g-1)相對其他點較高,沿黃河故道采樣點TBC和HBCDs的含量較低。可能是黃河改道上游的污染不流經(jīng)黃河故道,也不會隨著徑流的泥沙攜帶而沉積,并且政府出臺了保護黃河故道的政策。另外,空氣進行遠距離傳輸是TBC、HBCDs遷移的方式之一,但主要的污染方式還是點源污染。4.用SPSS 17.0對檢測結(jié)果進行分析(1)對TBC和HBCDs進行相關(guān)性分析表明:HBCDs三種同分異構(gòu)體之間顯著相關(guān),TBC與HBCDs各同分異構(gòu)體之間存在弱相關(guān),這表明TBC與HBCDs的污染源可能存在一定的區(qū)別。(2)TOC與TBC、HBCDs呈弱的正相關(guān)性,TOC與TBC,α-HBCD,β-HBCD,γ-HBCD,ΣHBCDs含量相關(guān)系數(shù)分別為:r=0.154(p=0.473),r=0.138(p=0.522),r=0.02(p=0.917),r=0.295(p=0.162),r=0.275(p=0.194)。這一結(jié)果表明:沉積物中總有機碳含量是影響B(tài)FRs分布的因素之一。(3)對黃河三角洲濕地沉積物中TBC、α-、β-、γ-HBCD和ΣHBCDs進行儲量估計,并對TBC和HBCDs的暴露途徑包括職業(yè)暴露和非職業(yè)暴露(飲食暴露、吸吸暴露、皮膚攝入等)進行分析。(4)為進一步了解黃河三角洲濕地沉積物中TBC和HBCDs的水平,將該區(qū)域與膠州灣濕地進行對比,結(jié)果表明:TBC含量約高于膠州灣濕地2倍,HBCDs的含量稍低于膠州灣濕地。在與世界其它地區(qū)對比中發(fā)現(xiàn),黃河三角洲濕地HBCDs的含量(8.40 ng?g-1)處于中等水平。
[Abstract]:With the extensive use of persistent organic pollutants, environmental problems become more and more serious. A number of countries and international organizations have begun to ban or restrict their production and use, such as polybrominated diphenyl ether (PBDEs) and polychlorinated biphenyls (PCBs).) However, some new brominated flame retardants, (BFRs), have begun to emerge, such as tris (2br 3 dibromopropyl) isocyanurate (TBC), hexabromocyclododecane (HBCDs), tetrabromobisphenol A (TBBPA), which are widely used in the petrochemical industry. Mechanical manufacturing, electronic and electrical products manufacturing industry, research shows that they have the properties similar to the persistent organic pollutant (POPs), and they are widely distributed in the environment. Taking the wetland in the Yellow River Delta as an environmental model, the pollution level, composition, correlation with TOC, reserve estimation and exposure risk of TBC and HBCDs in the sediments of the wetland are studied in this paper. The main contents and conclusions are as follows: 1. In this experiment, the pretreatment and detection methods of TBC and HBCDs were optimized. The samples were freeze-dried, Soxhlet extraction, over-composite silica gel chromatography column, rotary evaporation and nitrogen concentration, and finally were separated and detected by UPLC-MS-MS. In order to ensure the accuracy of the experiment and to carry out the sample recovery experiment, the isotopic labeled [13C12]-偽 -, 尾 -, 緯-HBCD was added to all samples as the internal standard of recovery. The recoveries were 88? The range of relative standard deviation (RSD) is 4.73 / 9.11. The results showed that the detection rate of TBC was 100%, the content was between 0.20-29.03 ng g ~ (-1), the average content was 6.88 ng g ~ (-1); The detectable rates of 偽 -, 尾 -, 緯-HBCD were 75 / 71and 96, respectively. The average content of 偽 -, 尾 -, 緯-HBCD was 0.69 ng / g ~ (-1) 0.42 ng / g ~ (-1) and 5.20 ng / g ~ (-1), respectively. The percentage of 偽 -, 尾 -, 緯-HBCD were 10.1% (5.7-17.0%), 6.1% (3.0-12.1%) and 83.8% (73.2-100.0%), respectively. The average HBCDs content (10.46 ng g ~ (-1) at the Yellow River Estuary is higher than that at the other points, and the TBC and HBCDs contents are lower in the sampling sites along the Yellow River. It is possible that the pollution from the upstream diversion of the Yellow River does not flow through the Yellow River's old road, nor does it deposit with the sediment carried by the runoff, and the government has issued policies to protect the Yellow River's old road. In addition, long distance air transport is one of the ways of TBC,HBCDs transport, but the main pollution is point source pollution. 4. 4. The results were analyzed with SPSS 17.0. (1) the correlation analysis of TBC and HBCDs showed that there was a significant correlation among the three isomers of HBCDs, and there was a weak correlation between the isomers of TBC and HBCDs. These results suggest that there may be some differences between TBC and HBCDs. (2) there is a weak positive correlation between TOC and TBC,HBCDs, and the correlation coefficients of TOC and TBC, 偽-HBCD, 尾-HBCD, 緯-HBCD, 危 HBCDs are: rn 0. 154 (p0. 473), and the correlation coefficient between TOC and TBC, 偽-HBCD, 尾-HBCD, 緯-HBCD, 危 HBCDs is 0. 154 (p0. 473). The results were as follows: (1) 0.138 (p0. 522), 0. 02 (p0. 917), 0. 295 (p0. 162), 0. 275 (p0. 194). The results show that the content of total organic carbon in sediments is one of the factors affecting the distribution of BFRs. (3) the reserves of TBC, 偽 -, 尾 -, 緯-HBCD and 危 HBCDs in sediments of wetlands in the Yellow River Delta are estimated. The exposure pathways of TBC and HBCDs including occupational exposure and non-occupational exposure (diet exposure, inhalation exposure, skin intake, etc.) were analyzed. (4) to further understand the levels of TBC and HBCDs in the sediments of the Yellow River Delta wetland. The results showed that the content of TBC was about 2 times higher than that of Jiaozhou Bay wetland, and the content of HBCDs was slightly lower than that of Jiaozhou Bay wetland. Compared with other parts of the world, the HBCDs content (8.40 ng?g-1) of the wetland in the Yellow River Delta is at the middle level.
【學位授予單位】:青島大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:X592

【參考文獻】

相關(guān)期刊論文 前8條

1 王玲;鄭明剛;趙燕燕;王春;李妍;樓迎華;石磊;;三(2,3-二溴丙基)異氰脲酸酯對微擬球藻的毒性效應(yīng)[J];環(huán)境化學;2015年08期

2 趙燕燕;王玲;樓迎華;鄭明剛;趙全升;王杰;李妍;王春;;氣質(zhì)聯(lián)用測定膠州灣北岸潮間帶底泥中的新型溴代阻燃劑[J];環(huán)境化學;2015年02期

3 邵潘柱;楊遲;林金杏;胡建華;;三-(2,3-二溴丙基)異氰脲酸酯對斑馬魚胚胎發(fā)育的毒性研究[J];上海交通大學學報(農(nóng)業(yè)科學版);2014年04期

4 周麗;張秀藍;楊文龍;李玲玲;史雙昕;張利飛;董亮;黃業(yè)茹;;蘇南地區(qū)香樟樹皮中有機氯農(nóng)藥(OCPs)的污染水平及來源解析[J];環(huán)境科學;2014年03期

5 張續(xù);黎娟;劉雅思;陳曦;張捷;周群芳;梁勇;;三-(2,3-二溴丙基)異氰脲酸酯和17β-雌二醇復合暴露對雄性斑馬魚的毒性效應(yīng)[J];環(huán)境科學學報;2012年02期

6 ;Detection of tris-(2, 3-dibromopropyl) isocyanurate as a neuronal toxicant in environmental samples using neuronal toxicity-directed analysis[J];Science China(Chemistry);2011年10期

7 ;Toxicity of the brominated flame retardant tris-(2,3-dibromopropyl) isocyanurate in zebrafish (Danio rerio)[J];Chinese Science Bulletin;2011年15期

8 鄒夢遙;龔劍;冉勇;;珠江三角洲流域土壤多溴聯(lián)苯醚(PBDEs)的分布及環(huán)境行為[J];生態(tài)環(huán)境學報;2009年01期

相關(guān)博士學位論文 前3條

1 王旭;哈爾濱市土壤與大氣中OCPs和BFRs分布特征及源匯分析[D];哈爾濱工業(yè)大學;2009年

2 劉靜;土壤中類二VA英和阻轉(zhuǎn)類PCBs分析方法、來源解析和分布規(guī)律研究[D];山東大學;2007年

3 張曉龍;現(xiàn)代黃河三角洲濱海濕地環(huán)境演變及退化研究[D];中國海洋大學;2005年

相關(guān)碩士學位論文 前2條

1 趙燕燕;新型溴代阻燃劑在膠州灣濕地污染狀況及遷移轉(zhuǎn)化的研究[D];青島大學;2015年

2 黎娟;溴化阻燃劑三-(2,,3-二溴丙基)異氰脲酸酯(TBC)對斑馬魚胚胎、小鼠及大鼠的毒性效應(yīng)研究[D];華中農(nóng)業(yè)大學;2011年



本文編號:2368636

資料下載
論文發(fā)表

本文鏈接:http://www.wukwdryxk.cn/shengtaihuanjingbaohulunwen/2368636.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶8166c***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
麻豆激情| 亚洲国产精品不卡Av在线| 蒙城县| 91popny丨九色丨国产| 色婷婷成人| 天天躁夜夜躁狠狠躁| 婷婷久久香蕉五月综合加勒比| 国产成人精品免费视频大全软件| 18禁黄网站禁片免费观看国产| 尹人香蕉99久久综合网站| 全部av―极品视觉盛宴| 五常市| 张北县| 河北区| 国精产品一区二区三区糖心269| 正宁县| 霍林郭勒市| 狼友网精品视频在线观看| 熟妇性hqmaturesex| 熟女一区二区三区| 黑人巨大精品欧美一区二区| 欧美精品一区二区| 伊人中文字幕| 轮台县| www.色五月.com| 国产乱子伦精品免费女| 99久久九九社区精品| 国产精品久久久久久久福利| 四虎.com| 精品国产一区二区三区性色av| 日韩精品人妻一区二区三区| 蜜臀久久精品久久久久| 四影虎影4c4| 亚洲国产精品成人综合久久久久久久 | 欧美精产国品一二三| 亚洲国产一区二区a毛片| 中文有码在线观看| 在线亚洲人成电影网站色www| 人无娇妻中日久久持久久麻豆| 天使色吧| 69亚洲精品久久久蜜桃小说|