Environmental impact of aggregate mining activities of crushed rock industry limited on surface water quality. – E. C. Ukpong
The impact of aggregate mining operation on surface water quality investigated to know the environmental conditions prevailing in Old Netim in Akamkpa Local Government Area of Cross River State on the quarry site of Crushed Rock Industries Limited. Three sampling points were chosen for the study which are SP2, SP4, and SP8 respectively, located at the upstream and downstream. Samples were collected and tested for the physicochemical parameters, nutrients and trace metals of surface water at point 2, 4 and 8 during wet and dry season. Results obtained showed the presents of nutrients and trace metals as in Table 1, 2 and 3 respectively. The results obtained were compared with WHO and FMENv standards, their deviation from standard were either positive or negative as shown in Table 3. The highest deviation from both standards was +2.06 and +0.006 as observed in alkalinity, -69.89mg/l for chloride and -52.17mg/l for magnesium. Iron deviated from WHO standard at -1.12mg/l and -17.88mg/l from FMENv standard.