• Azmatullah Khan

• Muhammad Habib

• Muhammad Irfan

• Muhammad Akram

• Naik Muhammad

• Nawaz Ali

• Zafar Baloch

• Gohram Khan

• Abdul Malik Rehan Abbasi

• Saeeda Yousaf

• Najeeb Ullah

• Mohammad Danish Saleem

• Salman Shahid

• Muhammad Sanaullah

• Zabiullah Khan

• Sheharyar Kakar

• Mehrab Malik

Abstract

Among various pollutants, wastewater consists of toxic or carcinogenic heavy metals such as lead (Pb), zinc (Zn), and copper (Cu). In this study, the contamination of heavy metals in residential (Domestic) and commercial (Car-wash centre) effluents from urban area of Quetta has been investigated using atomic absorption spectroscopy. The collected liquid effluent was passed through sorbents in vertical flow. The combined batch of Fly ash and Sawdust (adsorbents) showed high sorption capacity 0.0000424 mg·g-1 for lead (residential liquid waste) and 0.0000012 mg·g-1 for Cu (commercial liquid waste). The moderate partition coefficients were 0.001247 (Pb) and 0.000005 (Cu) mol·kg-1·Pa-1 for residential and commercial waste respectively. The highest removal efficiency of lead (99.763%) for residential effluent showed the breakthrough at 0.002. Thus, the sorbents have used significantly high removal efficiency for Pb, moderate for Zn, and low for Cu. The effluent passed from designed filter media may be greatly effective for partial domestic usage i.e., washing, cleaning and irrigation purpose

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