ارزيابي ميزان تجمع و منشأ هيدروكربن‌هاي آروماتيك چند حلقه‌اي ( PAHs) در آب، رسوب و جلبك قهوه‌اي Cystoseira indica در سواحل شمالي درياي مكران

Evaluation of the accumulation and origin of polycyclic aromatic hydrocarbons (PAHs)in water, Sediment and brown algae Cystoseira indica in the northern coast of Makoran Sea

ﺗﺮﮐﯿﺒﺎت ﻫﯿﺪروﮐﺮﺑﻦﻫﺎي آروﻣﺎﺗﯿﮏ ﭼﻨﺪ ﺣﻠﻘﻪاي ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﺳﻤﯿﺖ ﺑﺎﻻي ﺧﻮد از ﺗﺮﮐﯿﺒﺎت آﻟﯽ ﺑﺎاﻫﻤﯿﺖ در اﮐﻮﺳﯿﺴﺘﻢﻫﺎي ﺧﺎﮐﯽ و آﺑﯽ ﺑﻮده و ﺑﺮاي آﺑﺰﯾﺎن ﺑﺴﯿﺎر ﺧﻄﺮﻧﺎك و ﻣﻬﻠﮏ ﻫﺴﺘﻨﺪ. ﺑﻪ ﻫﻤﯿﻦ دﻟﯿﻞ در اﯾﻦ ﺗﺤﻘﯿﻖ، ﻣﯿﺰان ﺗﺠﻤﻊ ﺗﺮﮐﯿﺒﺎت ﻣﺨﺘﻠﻒ ﻫﯿﺪروﮐﺮﺑﻦﻫﺎي آروﻣﺎﺗﯿﮏ ﭼﻨﺪ ﺣﻠﻘﻪاي در ﻧﻤﻮﻧﻪﻫﺎي رﺳﻮب، آب و ﺟﻠﺒﮏ ﻗﻬﻮهاي Cystoseira indica در ﻃﻮل ﺳﻮاﺣﻞ ﺷﻤﺎل درﯾﺎي ﻣﮑﺮان در 10 اﯾﺴﺘﮕﺎه در ﭘﺎﯾﯿﺰ 1397 ﻣﻮرد ارزﯾﺎﺑﯽ ﻗﺮار ﮔﺮﻓﺖ. ﺳﻨﺠﺶ ﻣﯿﺰان ﻏﻠﻈﺖ ﺗﺮﮐﯿﺒﺎت ﻫﯿﺪروﮐﺮﺑﻦﻫﺎي آروﻣﺎﺗﯿﮏ ﭼﻨﺪ ﺣﻠﻘﻪاي ﺑﻪوﺳﯿﻠﻪ دﺳﺘﮕﺎه HPLC ﺻﻮرت ﭘﺬﯾﺮﻓﺖ. ﻣﯿﺰان ﻣﯿﺎﻧﮕﯿﻦ ﻏﻠﻈﺖ ﮐﻞ ﺗﺮﮐﯿﺒﺎت ﻫﯿﺪروﮐﺮﺑﻦﻫﺎي آروﻣﺎﺗﯿﮏ ﭼﻨﺪ ﺣﻠﻘﻪاي در ﻧﻤﻮﻧﻪﻫﺎي رﺳﻮب 62/98 ﻧﺎﻧﻮﮔﺮم ﺑﺮ ﮔﺮم وزن ﺧﺸﮏ، در ﻧﻤﻮﻧﻪﻫﺎي آب 3/71 ﻣﯿﮑﺮوﮔﺮم ﺑﺮ ﻟﯿﺘﺮ، در ﺟﻠﺒﮏ 6/003 ﻧﺎﻧﻮﮔﺮم ﺑﺮ ﮔﺮم وزن ﺧﺸﮏ ﺳﻨﺠﺶ ﮔﺮدﯾﺪ. ﺗﻔﺎوت ﻣﻌﻨﯽداري ﺑﯿﻦ ﻣﯿﺰان آﻟﻮدﮔﯽ ﺑﻪ اﯾﻦ ﺗﺮﮐﯿﺒﺎت در ﻧﻤﻮﻧﻪﻫﺎي آب و رﺳﻮب و ﺟﻠﺒﮏ در اﯾﺴﺘﮕﺎه ﺧﻠﯿﺞ ﭼﺎﺑﻬﺎر و ﮐﻤﺘﺮﯾﻦ آن در اﯾﺴﺘﮕﺎه ﭘﺴﺎﺑﻨﺪر ﻣﺸﺎﻫﺪه ﺷﺪ )0/05

Polycyclic aromatic hydrocarbons (PAHs), due to their high toxicity, are important organic compounds in the soil and water ecosystems and are very dangerous for aquatic animals. This study was carried out on the northern coast of the Gulf of Oman in November 2017. PAHs concentration was determined in coastal sediment, water and brown algae (Cystoseira indica) in ten different sampling sites along the northern coasts of Oman Sea. The concentration of PAHs compounds was measured by HPLC. The mean concentration of total PAHs compounds in the sediment, water and algae (C.indica) samples were 62.98 ng/g.dw, 3.71 µg/l, and 6.003 ng/g.dw, respectively. Significant differences were found between the highest and lowest rate of contamination in Chabahar Bay and Pasabandar sites, respectively (P<0.05). These cases indicate that contamination of polycyclic aromatic hydrocarbons in sediments on the northern coast of the Makoran Sea is lower than global standards. The Fluoranthene/Pyrene and Chrysene/benzo (a) anthracene pointed to petrogenic origin and in some cases pyrolytic source was established. This finding revealed a negative eco-risk effects occasionally occur in this area.