Document Details
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Document Type |
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Thesis |
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Document Title |
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Effect of Waste Water Pollution on Some Halophytes Grow at The Red Sea Coast South of Jeddah City تأثيــر التلوث بميـاه الصـرف على بعض النباتات الملحية النامية على شاطئ البحر الأحمر جنوب مدينة جده |
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Subject |
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biological sciences department |
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Document Language |
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Arabic |
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Abstract |
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The huge increase in the population of Jeddah Government caused an increase in water consumption, which caused a consequence increase in wastewater quantities discharged. Large amounts of these waters (treated & untreated) is discharged into the shores of the red sea in a daily basis, which caused - and will cause - harmful effects to adjacent marine & coastal environments and their biota. This research aims to clarify some of these negative effects of the wastewater on the red sea coast south of Jeddah City, in which the accumulation of different ions - especially the heavy elements - in the water, soil and plant tissues have been studied.Two locations were selected for study: the first one, which receives a huge daily influx of wastewater, is located near Al-Khumra treatment plant; while the other one (control) is about 30Km away (Near Al-shua’iba), in clean & unpolluted area. Because of the low vegetation density, only three plant species were chosen for analysis: Suaeda aegyptiaca, Zygophyllum album and Cyperus jeminicus. The following elements and heavy metals were analyzed in all the samples (water, soil and plant tissues) from both locations: Ca, Mg, K, P, Fe, Na, Cl, Cu, Zn, Mn, Mo, B, Ni, Pb, Al, Co, Cr, Ag, Hg, As, Ba, Cd, and Se; while soil and water samples were measured also for EC and pH.The results show that there were high concentrations of ions in the water, soil and plant samples in the polluted area, in comparison with the control. Na and Cl were the highest ions of all elements especially in the polluted area, which reflect the saline nature of the sea. The heavy metals concentration in the polluted samples also was significantly higher than control samples. Al had the highest concentration followed by Zn, while As and Cd were the lowest. Hg measure was negative in all the samples (polluted and control). pH reading in both areas was between 7.4-7.9, while EC was higher in the polluted area than control.The results show also that the three plant species differ in their content of different ions, and that they accumulate more than one ion in their tissues: Suaeda aegyptiaca accumulated seven elements (Mn, Cu, Zn, Al, Ba, Ni, Cr), Zygophyllum album accumulated six elements (Cu, Mn, Zn, Cr, Ni, Ba, Al, Co, Ag), while Cyperus jeminicus accumulated three elements only (Ag, Mn, Zn). The three plant species also found to be hyper-accumulators for some ions; Suaeda aegyptiaca is hyper-accumulator for Ni and Al, while Zygophyllum album and Cyperus jeminicus are hyper-accumulator for Zn, Ni and Al.
According to these results, this research could be used as a starting point for further research to clarify the possibility of using any of theses species in the phytoremediation of heavy-metals-polluted soils. |
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Supervisor |
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: Prof. Hassan Saeed Al-Zahrani |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1433 AH
2011 AD |
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Added Date |
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Tuesday, December 13, 2011 |
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Researchers
| سعيد علي الزهراني | Al-Zahrani, Saeed Ali | Researcher | Master | |
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