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Biogenic silica, eutrophication risk and different forms of phosphorus in surface sediments of Anzali wetland, Caspian Sea
Marine Pollution Bulletin ( IF 5.3 ) Pub Date : 2021-11-17 , DOI: 10.1016/j.marpolbul.2021.113138
Kazem Darvish Bastami 1 , Ali Hamzepoor 1 , Hadi Raeisi 2 , Hosein Bagheri 1 , Mehrnaz Baniamam 3 , Reza Rahnama 1
Affiliation  

This investigation aimed to determine the contents of biogenic SiO2 and different phosphorus forms (P) and to evaluate phosphorus ecological risk in surface sediment of Anzali wetland. According to the results, biogenic SiO2 ranged from 0.29 to 3.04%. Also, the average biogenic SiO2 at all studied stations was 1.36 ± 0.83%. Results indicated that total P (TP) was between 493 and 771 ppm, averaged 637.20 ± 79.41 ppm. Moreover, inorganic P (INTP) ranged from 256.63 to 376.89 ppm and composed 51.46 ± 4.68% of total P. The percentage of P-forms was in descending order: residual-P > Fe-P > Ca-P > Al-P > labile-P. Phosphorus pollution index (PPI) ranged from 0.82 to 1.29, with an average of 1.06 in the sediment of the Anzali wetland. The Sediment P saturation (SPS) values varied considerably from 40.96 to 83.57, with an average SPS value of 49.1. Based on the eutrophication risk index, all stations except one had a low eutrophication risk index.



中文翻译:

里海安扎利湿地表层沉积物中的生物二氧化硅、富营养化风险和不同形式的磷

本次调查旨在测定安扎里湿地表层沉积物中生物源SiO 2和不同磷形态(P)的含量,评估磷生态风险。根据结果​​,生物源 SiO 2 的范围为 0.29 至 3.04%。此外,所有研究站点的平均生物 SiO 2为 1.36 ± 0.83%。结果表明,总磷 (TP) 介于 493 和 771 ppm 之间,平均为 637.20 ± 79.41 ppm。此外,无机磷 (INTP) 范围为 256.63 至 376.89 ppm,占总磷的 51.46 ± 4.68%。 P 形式的百分比按降序排列:残留-P > Fe-P > Ca-P > Al-P >不稳定的污染指数(PPI)范围为0.82~1.29,安扎里湿地沉积物平均为1.06。沉积物 P 饱和度 (SPS) 值在 40.96 到 83.57 之间变化很大,平均 SPS 值为 49.1。根据富营养化风险指数,除一个站点外,所有站点的富营养化风险指数均较低。

更新日期:2021-11-17
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