A comparative study of heavy metal concentrations in surficial sediments from coastal areas of Karachi, Pakistan

Qari, Rashida; Siddiqui, Salimuzzaman; Qureshi, Naureen Aziz

doi:10.1016/j.marpolbul.2005.01.024

Cited by 21 publications

(11 citation statements)

References 3 publications

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“…Further, galvanized steel use in the Assaloyeh oil and gas facilities contain cadmium coating which can end up in these waters. Copper contamination Qari and Siddiqui (2010) is associated with algal levels of [20.00 lg g -1 . Lozano et al (2003), coins Pb values [10 lg g -1 to algal species from contaminated areas.…”

Section: Resultsmentioning

confidence: 99%

Metal Pollution in Seaweed and Related Sediment of the Persian Gulf, Iran

Alahverdi

Savabieasfahani

2012

Bull Environ Contam Toxicol

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Nickel, cadmium, copper and lead in the sediment and seven species of algae from six locations in the Bushehr Province on the Coast of the Persian Gulf were determined. Sampling sites represent areas of importance in seaweed harvest and areas near sources of anthropogenic pollution. The mean concentrations of metals in the sediment (across all six collection sites, and collection periods) were: Pb (42.4 ± 2.7), Cd (7.4 ± 1), Ni (38.1 ± 3.7), and Cu (8.3 ± 1.2) μg g(-1) dry weight. High significant positive correlations existed between metals in cervicornis, corticata, and pavonica algae and the sediment, suggesting these species of algae are suitable for biomonitoring of the area.

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Section: Resultsmentioning

confidence: 99%

Metal Pollution in Seaweed and Related Sediment of the Persian Gulf, Iran

Alahverdi

Savabieasfahani

2012

Bull Environ Contam Toxicol

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“…This, coupled with ever increasing population pressure, urbanization, and industrialization of the coastal areas, not only contributes to huge quantities of effluent discharges but also is of extreme importance as most are unregulated and untreated (less than 20%). Consequently, the coastal marine environment is feared to be exposed to considerable pressure by metal contamination [15]. Disposal of sewage water and industrial wastes is a great problem.…”

Section: Introductionmentioning

confidence: 99%

Pollution Status of Pakistan: A Retrospective Review on Heavy Metal Contamination of Water, Soil, and Vegetables

Waseem

Arshad

Iqbal

et al. 2014

BioMed Research International

279

131

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Trace heavy metals, such as arsenic, cadmium, lead, chromium, nickel, and mercury, are important environmental pollutants, particularly in areas with high anthropogenic pressure. In addition to these metals, copper, manganese, iron, and zinc are also important trace micronutrients. The presence of trace heavy metals in the atmosphere, soil, and water can cause serious problems to all organisms, and the ubiquitous bioavailability of these heavy metal can result in bioaccumulation in the food chain which especially can be highly dangerous to human health. This study reviews the heavy metal contamination in several areas of Pakistan over the past few years, particularly to assess the heavy metal contamination in water (ground water, surface water, and waste water), soil, sediments, particulate matter, and vegetables. The listed contaminations affect the drinking water quality, ecological environment, and food chain. Moreover, the toxicity induced by contaminated water, soil, and vegetables poses serious threat to human health.

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“…The optimum salinity range for Avicennia seedling growth is 5-30‰. The functional physiology and reproductive activity of marine biota are also affected by high salinity (Qari et al 2005).…”

Section: Resultsmentioning

confidence: 99%

“…Karachi coast is now overwhelmed with heavy pollution load owing to heavy domestic and industrial discharges, port and shipping activities and solid waste dumping (Qari et al 2005;Rizvi et al 1988;Saifullah et al 2002). Without doubts, it can be argued that 135-km-long coastline in Karachi is the most polluted area along the entire Pakistani coast (Khan and Khan 2001).…”

Section: Introductionmentioning

confidence: 99%

A preliminary pollution appraisal of western backwater at Karachi Coastal area

et al. 2019

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This study aims at preliminary analysis of pollution profile of western backwater. The site is very important from the ecological perspective. The mangrove ecosystem of the study area is of prime significance, whilst the study area is receiving heavy pollution load from Lyari River. The water samples were collected from the pre-designated locations and analyzed for physical and biochemical characteristics. The BOD and COD concentrations of the samples were extremely higher from the environmental and ecological viewpoint. The heavy inorganic and organic load is coming from the domestic and industrial effluents coming from Lyari River. Oil and grease concentrations were also extremely higher in all these sites indicating the hampering of natural purification system of water. The concentration of phenol also indicates the emptying of industrial effluent at the Lyari River outfall. The heavy influx of the nutrients in the form of nitrogen and phosphate represents the problem of eutrophication at the study area. Out of all 7 sites, L-7 was most polluted as it was closed to the Lyari River outfall.

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A comparative study of heavy metal concentrations in surficial sediments from coastal areas of Karachi, Pakistan

Cited by 21 publications

References 3 publications

Metal Pollution in Seaweed and Related Sediment of the Persian Gulf, Iran

Metal Pollution in Seaweed and Related Sediment of the Persian Gulf, Iran

Pollution Status of Pakistan: A Retrospective Review on Heavy Metal Contamination of Water, Soil, and Vegetables

A preliminary pollution appraisal of western backwater at Karachi Coastal area

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