發(fā)布時間：2018-12-09 09:46

【摘要】：為了解惠州市土壤中多環(huán)芳烴的空間分布特征,采集了該市不同區(qū)縣42個不同土地利用類型的表層土壤樣品,并結(jié)合地理信息系統(tǒng)(GIS)技術(shù)分析惠州市土壤多環(huán)芳烴的空間分布特征,探清惠州市土壤多環(huán)芳烴的殘留現(xiàn)狀、來源和擴(kuò)散趨勢等,為惠州市土壤多環(huán)芳烴的污染治理奠定理論基礎(chǔ)。結(jié)果表明,土壤中多環(huán)芳烴總量介于35.40~534.5μg·kg-1,平均值為123.09μg·kg-1。空間分布分析結(jié)果顯示,Chr和Bkf具有強(qiáng)烈的空間相關(guān)性;Nap、Ace、Acy、Flu、Phe、Ant、Fla、Baa、Daa和Bbf具有中等空間相關(guān)性;Pyr、Bap、I1p和Bgp空間相關(guān)性很弱。趨勢分析顯示,16種多環(huán)芳烴在東西和南北方向上呈現(xiàn)出明顯的增減規(guī)律性。Nap和Bkf由東向西、由南向北逐漸升高,而Flu、Pyr、Baa、Bbf、Ipy、Daa則恰好相反;Acy、Ace、Ant均由東向西、由南向北急劇升高,與Phe、Fla的變化趨勢恰好相反;Chr和Bap在東西、南北方向沒有明顯趨勢變化;Bgp在東西方向上,由東向西逐漸下降,而在南北方向上,呈明顯的倒U形。利用GIS軟件地統(tǒng)計模塊進(jìn)行了普通克里格(Ordinary Kriging)插值,結(jié)果顯示16種多環(huán)芳烴組分分布特征各不相同,Ace、Acy和Ant等3種多環(huán)芳烴組分含量呈現(xiàn)出自西北向東南方向遞增的趨勢;Phe、Fla、Pyr、Bkf、Chr、I1p、Daa和Bgp等則恰好相反;Nap、Bbf和Bap等沒有明顯的分布趨勢。Nap最高含量區(qū)面積很小,Bap高含量區(qū)面積較大,Baa在整個惠州市含量均較低,但在惠城區(qū)出現(xiàn)明顯的島狀高含量分布區(qū)。以上結(jié)果反映了不同區(qū)域多環(huán)芳烴來源的不同,而多環(huán)芳烴的來源與當(dāng)?shù)亟?jīng)濟(jì)社會發(fā)展情況及產(chǎn)業(yè)結(jié)構(gòu)關(guān)系密切,主要包括工業(yè)"三廢"、交通廢氣、石油燃燒和、生活垃圾焚燒等。
[Abstract]:In order to understand the spatial distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) in soil of Huizhou City, 42 topsoil samples of different land use types in Huizhou City were collected. The spatial distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) in soil of Huizhou city were analyzed by (GIS) technology, and the status quo, source and diffusion trend of PAHs in soil were investigated. It lays a theoretical foundation for pollution control of soil polycyclic aromatic hydrocarbons (PAHs) in Huizhou. The results showed that the total amount of PAHs in soil ranged from 35.40 渭 g to 534.5 渭 g kg-1, and the average value was 123.09 渭 g kg-1.. The results of spatial distribution analysis showed that Chr and Bkf had strong spatial correlation, Nap,Ace,Acy,Flu,Phe,Ant,Fla,Baa,Daa and Bbf had moderate spatial correlation, and Pyr,Bap,I1p and Bgp had weak spatial correlation. The trend analysis showed that 16 kinds of PAHs showed obvious regularity of increasing and decreasing in east-south direction. Nap and Bkf increased gradually from east to west, from south to north, but Flu,Pyr,Baa,Bbf,Ipy,Daa was just the opposite. Acy,Ace,Ant increased sharply from east to west and increased sharply from south to north, which was opposite to the change trend of Phe,Fla, while Chr and Bap had no obvious trend in east-west direction. In east-west direction, Bgp gradually decreased from east to west, while in the north and south direction, it was obviously inverted U-shaped. The general Kriging (Ordinary Kriging) interpolation is carried out by using the geostatistics module of GIS software. The results show that the distribution characteristics of 16 kinds of PAHs are different, Ace, is different. The contents of three kinds of PAHs such as Acy and Ant showed an increasing trend from northwest to southeast. Phe,Fla,Pyr,Bkf,Chr,I1p,Daa and Bgp were the opposite. There was no obvious distribution trend of Nap,Bbf and Bap. The area of the highest content of Nap was very small, the area of high content of Bap was larger, and the content of Baa was lower in Huizhou, but there were obvious island areas of high content in Huicheng. The above results reflect the different sources of PAHs in different regions, and the sources of PAHs are closely related to the local economic and social development and industrial structure, mainly including industrial "three wastes", traffic emissions, petroleum combustion and, Incineration of domestic waste, etc.
【作者單位】： 廣東省生態(tài)環(huán)境技術(shù)研究所;華南農(nóng)業(yè)大學(xué)資源環(huán)境學(xué)院;珠江流域水土保持監(jiān)測中心站;
【基金】：國土資源部農(nóng)業(yè)地質(zhì)與生態(tài)地球化學(xué)調(diào)查項(xiàng)目(基[2005]011-16) 國家重點(diǎn)研究計劃973子項(xiàng)目(2002CB410810) 廣東省科技計劃項(xiàng)目(2010B031800015)
【分類號】：P208;X53

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