تقييم جودة مياه الأمطار المجمعة في الخزانات الأرضية بمدينة صبراتة

Abstract EN

Libya is one of countries that depends entirely on groundwater, which is considered one of the depleting (non-renewable) sources.

Rain harvesting tanks were established in many regions of Libya in the 1980s, which may use by residents in household and irrigation activities.

This study focused on the quality of rainwater harvested from public water collection systems in the city of Sabratha and stored for long periods, Samples were collected and analyzed of water stored in these tanks.

The water quality parameter was determined based on eleven chemical and biological components (measurements) ,(pH, total dissolved salts, ammonium, nitrate, nitrogen dioxide, conductivity, turbidity, phosphate, salinity, chemical oxygen demand and biological oxygen demand) and percentage For some design heavy metals such as (iron, chromium, lead and zinc) using an atomic absorbent.

Six samples of rainwater were collected from the two collection tanks in the city, which are the symbols (A and B), in the period from July (2021).

The results of the analyses were compared with water quality guidelines of World Health Organization (WHO).

The results indicate that water collected from tank (B) is not suitable for domestic uses and irrigation due to the presence of high levels of chemical oxygen demand, biological oxygen demand, total dissolved solids, turbidity and lead (BOD, turbidity, TDS, COD, Pp).

While most of the parameters in tank (A) were within World Health Organization standards (WHO), with a high content of ammonium, phosphate and lead (NH4, PO4, Pp), the result concluded that rainwater collected from tank (A) is unsuitable for direct drinking and can be used for irrigation.