Analysis of heavy metal of copper (Cu) and lead (Pb) at Siombak Lake North Sumatera Province

Abstract

This research to knew heavy metal concentrate of copper (Cu) and lead (Pb) in the water and sediment. From this results showed indicated physics chemical parameter of Siombak Lake stilled in the normal range. The concentrations heavy metal copper (Cu) in the water column all the stations in sequence 0.525 mg/l, 0.54 mg/l, 0.51 mg/l and then the concentration heavy metal lead (Pb) in the water column 0.00165 mg/l, 0.0156 mg/l, 0.0148 mg/l. While heavy metal concentration of copper (Cu) in the sediment all the stations in sequence 2.68 mg/kg, 2.47 mg/kg and 21.54 mg/kg and then concentration of heavy metal lead (Pb) of 6.045 mg/kg, 7.17 mg/kg and 4.77 mg/kg. This result indicated the concentration of heavy metal copper and lead in the water column had exceeded the quality standard and concentration of copper and lead in sediment had not exceeded the quality standard.

Mitochondrial dysfunction and lipometabolic disturbance induced by the co-effect of polystyrene nanoplastics and copper impede early life stage development of zebrafish (Danio rerio)

“…10,38 The ubiquity of Cu pollution in the aquatic environment emphasizes the necessity of assessing the co-effect of NPs and Cu on aquatic organisms. 14,16 The current study reveals that co-exposure to NPs and Cu at environmentally-relevant concentrations induced mitochondrial dysfunction and lipometabolic disturbance, resulted in blocked lipid utilization and insufficient energy supply, and consequently affected the development and survival of zebrafish in early life stages.…”

“…Based on the results of our pre-experiments and the results of water environment research and previous toxicological studies, we determined that the Cu concentration was 50 μg L −1 and the NP concentration was 1000 μg L −1 in this study. [13][14][15][16]23 The control group (control) and three treatment groups were set up, and the treatment groups included the Cu exposure group (Cu 2+ , 50 μg L −1 ), the NP exposure group (NPs, 1000 μg L −1 ) and the group with co-exposure to NPs and Cu (NPs + Cu, NPs, 1000 μg L −1 , Cu 2+ , 50 μg L −1 ). The required NPs were added to 20 mL test tubes and the pH was adjusted to 7 ± 0.1 with 0.1 mmol L −1 HCl and 0.05 mmol L −1 NaOH to obtain the stock solution for the NP group with a final concentration of 100 mg L −1 .…”

“…[10][11][12] Among the trace metals, waterborne Cu is present in high concentrations due to natural and anthropogenic inputs. [13][14][15][16] Previous studies have demonstrated that high concentrations (100-1000 μg L −1 ) of Cu can cause adverse effects on the development and survival of fish larvae. [17][18][19] Hence, it is essential to assess the toxicity of co-exposure to NPs and Cu to aquatic organisms.…”