Environmental Assessment of El-Gharbia Main Drain Water

A. Abosena, H. Abbas, Ihab M. Farid, M. El-kholy
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引用次数: 1

Abstract

Samples of water, sediments and aquatic plants were collected from different sites along EL-Gharbia main drain. The sampling processes were carried out seasonally. The collected samples were subjected for a series of analyses, in terms of total and available contents of macro nutrients and potentially toxic elements (PTEs), biological investigation (pathogens contents) and chemical oxygen demand (COD) and biological oxygen demand (BOD). Water samples taken at most of the study sites during the year can be regarded acceptable for agricultural use, but only under particular conditions. On the other hand, these waters are not appropriate for agricultural use from a biological point of view. Enrichment factor (EF) values of the sediments were low for Mn, Zn, Co, B, Co, Cr, Ni and Pb in all seasons and at most sites. Unlike the EF values of the aforementioned PTEs, the enrichment factor for cadmium was generally, high at most sites within the four seasons. EF values of Pb were moderate at most sites. The bioaccumulation factor (BCF) values of the shoot of aquatic plants and BCF values of the roots were generally high for most elements in all seasons. Principal component analysis (PCA) revealed that these metals were originated from natural (Cd, Co, B and Cu) and anthropogenic (Fe, Zn, Mn, Cu, Ni and Cr) sources.
加纳主排水环境评价
在EL-Gharbia主要排水沟的不同地点收集了水、沉积物和水生植物样本。采样过程按季节进行。对采集的样品进行宏观营养物质和潜在有毒元素(pte)的总含量、有效含量、生物调查(病原体含量)、化学需氧量(COD)和生物需氧量(BOD)的分析。年内在大部分研究地点采集的水样可视为可用于农业用途,但只有在特定条件下才可接受。另一方面,从生物学的角度来看,这些水不适合农业使用。沉积物中Mn、Zn、Co、B、Co、Cr、Ni和Pb的富集因子(EF)值在所有季节和大部分地点均较低。与上述pte的EF值不同,镉的富集因子在四个季节的大多数地点普遍较高。大部分地点的铅EF值适中。水生植物的茎部和根部的生物积累因子(BCF)值在所有季节中大多数元素都普遍较高。主成分分析表明,这些金属主要来源于自然(Cd、Co、B和Cu)和人为(Fe、Zn、Mn、Cu、Ni和Cr)来源。
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