This work represents sources of polycyclic aromatic hydrocarbons in the local environment of five major stations at marshland in southern Iraq from May 2013. Average concentration of PAHs （polycyclic aromatic hydroca...This work represents sources of polycyclic aromatic hydrocarbons in the local environment of five major stations at marshland in southern Iraq from May 2013. Average concentration of PAHs （polycyclic aromatic hydrocarbons） in the sampling sediments and three types of plants were lower than the guideline value. This study examined presence of PAHs may from reach aquatic environment in marshes, deposition of airborne particles. Having a relatively low water solubility to the suspended particulate matter, most of the PAHs introduced to the aquatic environment tend to accumulate in bottom sediments. Sedimentary PAHs may thus provide a record of the input and history of these pollutants, and the distribution of PAH／＇s in aquatic sediments has received considerable attention. Owing to the concentration of PAHs in the study area, its concentration level still meets the sediment quality guideline value （ERL： 4,022 ng/g dry weight）; however, according to the PELq （probable effects level） factor, slightly adverse biological effects are associated with the exposure to PAHs levels in the study area （0.1 〈 PELq = 0.24 〈 0.5）.展开更多
The study was conducted in water marshes for five major marshes during the months of January, April and September of each region （Hawizeh, Hammer and the central marsh） in southern Iraq. Bacteriological analysis tha...The study was conducted in water marshes for five major marshes during the months of January, April and September of each region （Hawizeh, Hammer and the central marsh） in southern Iraq. Bacteriological analysis that some of the default pathological bacteria, including TC （Total bacterial count）, FCB （faecal coliform bacteria）, MPN （coliform bacteria） and FS （faecal streptococcus） can evidence to indicate of pollution. The results showed that most of the water samples examined pathological contain bacteria which indicates that the water is unfit for human consumption and the waters as basal （more hydrogen than No. 7）. There was a high salinity more than the permissible limits for human consumption and even to irrigate crops, and the same case for dissolve oxygen which exceeded are other limits as drinking water.展开更多
文摘This work represents sources of polycyclic aromatic hydrocarbons in the local environment of five major stations at marshland in southern Iraq from May 2013. Average concentration of PAHs （polycyclic aromatic hydrocarbons） in the sampling sediments and three types of plants were lower than the guideline value. This study examined presence of PAHs may from reach aquatic environment in marshes, deposition of airborne particles. Having a relatively low water solubility to the suspended particulate matter, most of the PAHs introduced to the aquatic environment tend to accumulate in bottom sediments. Sedimentary PAHs may thus provide a record of the input and history of these pollutants, and the distribution of PAH／＇s in aquatic sediments has received considerable attention. Owing to the concentration of PAHs in the study area, its concentration level still meets the sediment quality guideline value （ERL： 4,022 ng/g dry weight）; however, according to the PELq （probable effects level） factor, slightly adverse biological effects are associated with the exposure to PAHs levels in the study area （0.1 〈 PELq = 0.24 〈 0.5）.
文摘The study was conducted in water marshes for five major marshes during the months of January, April and September of each region （Hawizeh, Hammer and the central marsh） in southern Iraq. Bacteriological analysis that some of the default pathological bacteria, including TC （Total bacterial count）, FCB （faecal coliform bacteria）, MPN （coliform bacteria） and FS （faecal streptococcus） can evidence to indicate of pollution. The results showed that most of the water samples examined pathological contain bacteria which indicates that the water is unfit for human consumption and the waters as basal （more hydrogen than No. 7）. There was a high salinity more than the permissible limits for human consumption and even to irrigate crops, and the same case for dissolve oxygen which exceeded are other limits as drinking water.
