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Assessment of water quality of Manchar Lake in Sindh (Pakistan).

Manchar Lake is the largest natural freshwater lake in Pakistan. The Lake has received less fresh water in past few years. In addition, drainage water is being discharged in the Lake through Main Nara Valley Drain (MNVD) since many years. Consequently, concern has grown regarding the water quality o... Full description

Journal Title: Environmental monitoring and assessment June 2008, Vol.141(1-3), pp.287-296
Main Author: Mastoi, Ghulam Murtaza
Other Authors: Shah, Syed Ghulam Sarwar , Khuhawar, Mohammad Yar
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0167-6369
Link: http://search.proquest.com/docview/69176596/?pq-origsite=primo
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recordid: proquest69176596
title: Assessment of water quality of Manchar Lake in Sindh (Pakistan).
format: Article
creator:
  • Mastoi, Ghulam Murtaza
  • Shah, Syed Ghulam Sarwar
  • Khuhawar, Mohammad Yar
subjects:
  • Metals, Heavy–Analysis
  • Pakistan–Analysis
  • Spectrophotometry, Atomic–Analysis
  • Water Pollutants, Chemical–Analysis
  • Metals, Heavy
  • Water Pollutants, Chemical
ispartof: Environmental monitoring and assessment, June 2008, Vol.141(1-3), pp.287-296
description: Manchar Lake is the largest natural freshwater lake in Pakistan. The Lake has received less fresh water in past few years. In addition, drainage water is being discharged in the Lake through Main Nara Valley Drain (MNVD) since many years. Consequently, concern has grown regarding the water quality of the Lake. The aim of this study was to assess the water quality of Manchar Lake and MNVD and the objectives were to determine physiochemical properties and the concentrations of common cations and anions as well as seven trace metals i.e. Cu, Ni, Zn, Co, Fe, Pb and Cd. The concentration of the trace metals were determined by simultaneous preconcentration and solvent extraction using flame atomic absorption spectrometer. Results of physicochemical parameters of Manchar Lake water samples showed mean pH8.4 (c0.2), conductivity 2,310.3 (c581.3)kS cm super(-1) and hardness (as CaCO sub(3)) 213.1 (c62.3)mg l super(-1). Mean concentrations of cations and anions were Na 521.5 (c49.7), Cl super(-) 413.6 (c225.7), Ca 70.7 (c12.9), Mg 56.2 (c28.9), K 17.6 (c6.5), $$ {\text{NO}}{ - }_{3} $$ 0.34 (c0.2) and $$ {\text{PO}}{{3 - }}_{4} $$ 0.02 (c0.01) mg l super(-1). Mean concentrations of trace metals were Zn 15.7 (c1), Fe 12 (c3.5), Pb 9 (c2.7), Cu 8.9 (c7.7), Ni 4.3 (c3.4), Co 4 (c3.4) and Cd 1.1 (c1) kg l super(-1). MNVD water samples showed mean pH8.9 (c0.8), conductivity 1,735.7 (c567.8) kS cm super(-1) and hardness (as CaCO sub(3)) 184.8 (c32.4) mg l super(-1). In MNWD, the mean concentrations of cations and anions were Na 482.7 (c11.7), Cl super(-) 395.7 (c271.5), Ca 79.1 (c23.5), Mg 54.2 (c28.1), K 26.2 (c21.3), NO super(-3) 0.5 (c0.3) and $$ {\text{PO}}{{3 - }}_{4} $$ 0.1 (c0.1) mg l super(-1). Mean concentrations of trace metals observed in MNWD water were Fe 14.9(c3.5), Cd 8.3 (c9.4), Pb 6.9 (c2.4), Cu 6.6 (c3.1), Zn 6.2 (c1.8), Co 4.5 (c2.7), and Ni 3.5 (c2.9) kg l super(-1). The pH of both Manchar Lake and MNVD waters and concentration of Pb in Manchar Lake and concentration of Cd in MNVD water were higher than the World Health Organisation's guideline values for the drinking water quality. The water quality of Manchar Lake was found degraded.
language: eng
source:
identifier: ISSN: 0167-6369
fulltext: fulltext
issn:
  • 01676369
  • 0167-6369
url: Link


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titleAssessment of water quality of Manchar Lake in Sindh (Pakistan).
creatorMastoi, Ghulam Murtaza ; Shah, Syed Ghulam Sarwar ; Khuhawar, Mohammad Yar
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descriptionManchar Lake is the largest natural freshwater lake in Pakistan. The Lake has received less fresh water in past few years. In addition, drainage water is being discharged in the Lake through Main Nara Valley Drain (MNVD) since many years. Consequently, concern has grown regarding the water quality of the Lake. The aim of this study was to assess the water quality of Manchar Lake and MNVD and the objectives were to determine physiochemical properties and the concentrations of common cations and anions as well as seven trace metals i.e. Cu, Ni, Zn, Co, Fe, Pb and Cd. The concentration of the trace metals were determined by simultaneous preconcentration and solvent extraction using flame atomic absorption spectrometer. Results of physicochemical parameters of Manchar Lake water samples showed mean pH8.4 (c0.2), conductivity 2,310.3 (c581.3)kS cm super(-1) and hardness (as CaCO sub(3)) 213.1 (c62.3)mg l super(-1). Mean concentrations of cations and anions were Na 521.5 (c49.7), Cl super(-) 413.6 (c225.7), Ca 70.7 (c12.9), Mg 56.2 (c28.9), K 17.6 (c6.5), $$ {\text{NO}}{ - }_{3} $$ 0.34 (c0.2) and $$ {\text{PO}}{{3 - }}_{4} $$ 0.02 (c0.01) mg l super(-1). Mean concentrations of trace metals were Zn 15.7 (c1), Fe 12 (c3.5), Pb 9 (c2.7), Cu 8.9 (c7.7), Ni 4.3 (c3.4), Co 4 (c3.4) and Cd 1.1 (c1) kg l super(-1). MNVD water samples showed mean pH8.9 (c0.8), conductivity 1,735.7 (c567.8) kS cm super(-1) and hardness (as CaCO sub(3)) 184.8 (c32.4) mg l super(-1). In MNWD, the mean concentrations of cations and anions were Na 482.7 (c11.7), Cl super(-) 395.7 (c271.5), Ca 79.1 (c23.5), Mg 54.2 (c28.1), K 26.2 (c21.3), NO super(-3) 0.5 (c0.3) and $$ {\text{PO}}{{3 - }}_{4} $$ 0.1 (c0.1) mg l super(-1). Mean concentrations of trace metals observed in MNWD water were Fe 14.9(c3.5), Cd 8.3 (c9.4), Pb 6.9 (c2.4), Cu 6.6 (c3.1), Zn 6.2 (c1.8), Co 4.5 (c2.7), and Ni 3.5 (c2.9) kg l super(-1). The pH of both Manchar Lake and MNVD waters and concentration of Pb in Manchar Lake and concentration of Cd in MNVD water were higher than the World Health Organisation's guideline values for the drinking water quality. The water quality of Manchar Lake was found degraded.
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