 
          Biological Evidence 2018, Vol.8, No.3, 21-31
        
        
        
          31
        
        
          Seiyaboh E.I., Izah S.C., and Oweibi S., 2017c, Physico-chemical Characteristics of Sediment from Sagbama Creek, Nigeria, Biotechnological Research, 3(1):
        
        
          25-28
        
        
          Seiyaboh E.I., Inyang I.R., and Izah S.C., 2016a, Spatial Variation in Physico-chemical Characteristics of Sediment from Epie Creek, Bayelsa State, Nigeria,
        
        
          Greener Journal of Environment Management and Public Safety, 5(5): 100-105
        
        
        
          Seiyaboh E.I., Inyang I.R., and Izah S.C., 2016b, Seasonal Variation of Physico-Chemical Quality of Sediment from Ikoli Creek, Niger Delta, International
        
        
          Journal of Innovative Environmental Studies Research, 4(4): 29-34
        
        
          Singovszka E., Balintova M., and Holub M., 2014, Assessment of Heavy Metals Concentration in Sediments by Potential Ecological Risk Index, Journal of the
        
        
          Polish Mineral Engineering Society, No volume: 137-140
        
        
          Soliman N.F., Nasr S.M., and Okbah M.A., 2015, Potential ecological risk of heavy metals in sediments from the Mediterranean coast, Egypt, Journal of
        
        
          Environmental Health Science and Engineering, 13: 70
        
        
        
          PMid:26457189 PMCid:PMC4600254
        
        
          Swarnalatha K., Letha J., and Ayoob S., 2013, Ecological risk assessment of a tropical lake system, Journal of Urban and Environmental Engineering, 7(2):
        
        
          323-329
        
        
        
          Thambavani S.D., and Uma Mageswari Utsr., 2013, Metal pollution assessment in ground water. Bulletin of Environmental Pharmacology Life Science, 2(12):
        
        
          122–129
        
        
          Todorova Y., Lincheva S., Yotinov I., and Topalova Y., 2016, Contamination and Ecological Risk Assessment of Long-Term Polluted Sediments with Heavy
        
        
          Metals in Small Hydropower Cascade, Water Resource Management, 30: 4171–4184
        
        
        
          Tomlinson D., Wilson J., Harris C., and Jeffrey D., 1980, Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index,
        
        
          Helgolander Meeresunters, 33: 566–575
        
        
        
          Xu Z.Q., Ni S. J., and Tuo X.G., 2008, Calculation of heavy metals toxicity coefficient in the evaluation of potential ecological risk index, Environmental
        
        
          Science and Technology, 31: 112-115
        
        
          Zhu H., Yuan X., Zeng G., Jiang M., Liang J., Zhang C., Yin J., Huang H., Liu Z., and Jiang H., 2012, Ecological risk assessment of heavy metals in sediments
        
        
          of Xiawan Port based on modified potential ecological risk index, Transactions of Nonferrous Metals Society of China, 22: 1470-1477