Appraisal of metal contamination in sediments of lower reaches of Niger River, Nigeria, using contamination indices and sediment quality guidelines

2021 ◽  
pp. 1-20
Author(s):  
Bede Izuchukwu Ezewudo ◽  
Bernard Obialo Mgbenka ◽  
Md. Saiful Islam ◽  
Ram Proshad ◽  
Gregory Ejikeme Odo
Keyword(s):  
Metal Contamination ◽  
Sediment Quality ◽  
Sediment Quality Guidelines ◽  
Quality Guidelines ◽  
Contamination Indices ◽  
Niger River

Effect of local sources on metal concentrations in littoral sediments and aquatic macroinvertebrates of the St. Lawrence River, near Cornwall, Ontario

2000 ◽  
Vol 57 (S1) ◽  
pp. 113-125 ◽  
Author(s):  
Alain Filion ◽  
Antoine Morin
Keyword(s):  
Metal Contamination ◽  
Sediment Quality ◽  
Point Sources ◽  
Sediment Quality Guidelines ◽  
Metal Concentrations ◽  
Quality Guidelines ◽  
Local Point ◽  
Local Sources ◽  
Littoral Sediments ◽  
St Lawrence River

Concentrations of Cd, Cr, Cu, Fe, Hg, Ni, Pb, and Zn were measured in surface sediments and in five aquatic macroinvertebrate taxa to assess metal contamination in ecologically important but understudied shallow littoral areas of the St. Lawrence River, near Cornwall, Ontario, and to test for the effect of local point sources. Metal concentrations in littoral sediments were generally below the lowest effect level of the Ontario provincial sediment quality guidelines and were positively related to the proportion of fine particles and of organic matter in sediments. Analyses of the spatial distribution of metal concentrations in sediments and macroinvertebrates showed that local sources of Hg and Zn had contributed to the contamination of littoral sediments and macroinvertebrates. Concentrations of Cr, Fe, Ni, and Zn in chironomids and oligochaetes were similar or higher than levels reported for deeper sites in the Cornwall area, despite the much lower concentrations in littoral sediments, suggesting a higher bioavailability of metals in littoral than in deeper sediments. Although the effect of local point sources of metals was still detectable in 1994, the comparison with Ontario sediment quality guidelines and with other sites in the Great Lakes - St. Lawrence ecosystem suggests that metal contamination of littoral sediments and invertebrates was relatively low.

scholarly journals Analysis of Trace Metal Contamination in Pahang River and Kelantan River, Malaysia

2019 ◽  
Vol 266 ◽  
pp. 04003 ◽  
Author(s):  
Norpadzlihatun Manap ◽  
Kavitha Sandirasegaran ◽  
Noor Shahifah Syahrom ◽  
Amnorzahira Amir
Keyword(s):  
Trace Metals ◽  
Trace Metal ◽  
Metal Contamination ◽  
Sediment Quality ◽  
Primary Objective ◽  
Trace Metal Concentration ◽  
Trace Metal Contamination ◽  
Quality Guidelines ◽  
Fish Samples ◽  
Negative Impacts

The primary objective of this study is to determine trace metal contamination in environmental samples obtained from Pahang River and Kelantan River, Malaysia which may help to identify the risk of sustainable dredging in these areas. This research also proceeds to compare the trace metal concentration with the National Water Quality Standards of Malaysia, Interim Canadian Sediment Quality Guidelines and Malaysian Food Act 1983 to determine its limits and risks. Samples of water, sediment, snails and fishes were collected and analyzed for As, Cu, Cd, Cr, Fe, Pb, Ni, Mn, and Hg by using atomic absorption spectrophotometer. It was found that the concentration of trace metals namely As, Cu, Cd, Cr, Pb, Ni, and Hg in river water, sediment, snail and fish samples in Pahang River were lower than the maximum allowable limits, except for Fe and Mn. In Kelantan River, the concentration of trace metals indicating that it is contaminated with Fe, Mn, Pb, Cr, Cu, Hg, and As as all trace metals exceeded the maximum allowable limits. Negative impacts may arise, and the river may contaminate more in future if there is no proper management to tackle this issue during execution of dredging activities.

Sign in / Sign up

Export Citation Format

Share Document