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Table 7 Concentrations of metals in Little Akaki River sediment (mg/kg) and SQGs values

From: Little Akaki River sediment enrichment with heavy metals, pollution load and potential ecological risks in downstream, Central Ethiopia

Metal Overall mean concentration of elements in LAR sediment (mg/kg) USEPA (2002)   CCME (2001)
CB-TECa (mg/kg) CB-PECb (mg/kg) ISQGsc (mg/kg) PECd (mg/kg)
Zn 148.28 121 459 123 315
Cr 109.51 43.4 111 37.3 90
Pb 129.68 35.8 128 35.0 91.3
Cd 3.14 0.99 4.98 0.6 3.5
  1. aConsensus based threshold effect concentration (CB-TEC) (USEPA 2002); bConsensus based –probable effect concentration (CB-PEL) of (USEPA 2002); cInterim Sediment Quality Guidelines (ISQGs) of (CCME 2001); dProbable effects concentration (PEC) of (CCME 2001)