Table 4 Comparison of heavy metals concentration in water (mg/L) of rivers and tributaries and in agricultural soils (mg/kg) of selected farms in Cameron Highlands
| Â | Â | Â | Total heavy metal concentration (mg/kg)/(mg/L) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. | References/parameters (mean) | Sample | Rn222 (Bq/L) | Al | As | Ca | Cd | Co | Cr | Cu | Fe | K | Mg | Mn | Na | Ni | Pb | Zn |
1 | Khairiah et al. 2006 | Soil | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Brinchang |  | – | – | – | – | aBDL | – | 18 | 93 | 402 | – | – | 921 | – | – | aBDL | 87.6 | |
 Ringlet |  |  |  |  |  | 0.9 |  | 10 | 117 | 322 |  |  | 885 |  |  | aBDL | 90.2 | |
 Tanah Rata |  |  |  |  |  | 0.1 |  | 12 | 59 | 469 |  |  | 355 |  |  | aBDL | 38.1 | |
2 | Hamzah et al. 2011 | Soil | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Bharat |  | – | – | – | – | – | – | – | – | 3252 | – | – | – | – | – | – | 250 | |
 Kg. Raja |  |  |  |  |  |  |  |  |  | 4337 |  |  |  |  |  |  | 253 | |
 Lembah Bertam |  |  |  |  |  |  |  |  |  | 4100 |  |  |  |  |  |  | 246 | |
3 | Khalik and Abdullah 2013 | Water | – | 1.30 | 0.001 | 4.8 | 0.002 | – | – | 0.08 | 0.60 | 1.90 | 0.80 | 0.012 | 2.80 | – | 0.005 | 0.008 |
4 | Al-Nafiey et al. 2014 | Water | 0.25 | – | – | – | 0.009 | 0.009 | – | 0.08 | – | – | – | – | – | 0.043 | 0.07 | 0.08 |
5 | Ismail et al. 2017 | Water | – | – | – | – | – | – | aBDL-0.02 | aBDL-0.02 | – | – | – | – | – | – | aBDL-0.03 | aBDL-0.11 |