Research Article
Marine Environmental Risk Assessment of Sungai Kilim, Langkawi, Malaysia: Heavy Metal Enrichment Factors in Sediments as Assessment Indexes
Table 2
Five contaminant categories based on the EF value [
25].
| Enrichment factor (EF) value | Contamination degree |
| <2 | Deficiency to minimal enrichment | 2–5 | Moderate enrichment | 5–20 | Significant enrichment | 20–40 | Very high enrichment | >40 | Extremely high enrichment |
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