Heavy Metals Removal from Wastewater by
Adsorption on Modified Physically Activated Sewage
Sludge
Volume 1 - Issue 1
M Nageeb Rashed1*, ME Soltan1, MM Ahmed1 and ANA Abdou2
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- 1 Chemistry Department, Aswan University, Egypt
- 2 Egyptian Environmental Affairs Agency (EEAA), Egypt
*Corresponding author:
M Nageeb Rashed, Chemistry Department, Aswan Faculty of Science, AswanUniversity, 81528 Aswan, Egypt
Received: January 10, 2018; Published: January 24, 2018
DOI: 10.32474/AOICS.2018.01.000102
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Abstract
Low cost adsorbent (activated carbon) with a high metal adsorption capacity was prepared from the disposal sewage sludge
by physical activation method (Pyrolysis temperatures at 500 °C, 650 °C, 700 °C, 800 °C and 900 °C). The resulting material was
evaluated as adsorbents for the removal of Cd, Pb, Cu, and Mn from aqueous solution. The results revealed that sewage sludge
activated by pyrolysis at 800 °C [ASS800] was the most effective adsorbent for the removal of Cd, Pb, Cu and Mn from polluted
water. Batch studies were performed to evaluate the influences of various experimental parameters such as pH, initial metal ion
concentration, adsorbent dosage, and contact time and solution temperature. Adsorption of Cd, Pb, Cu and Mn by ASS800 increased
with increasing pH and adsorbent dosage, while decreasing with the increase of initial metal concentration. From batch adsorption
data the optimum conditions for the adsorption of Cd , Pb, Cu and Mn by ASS800 were 1gL-1 adsorbent dosage, 1 hour contact time,
10mgL-1 initial metal concentration, 25 °C solution temperature; and pH 6 . Adsorption data were well fitted to the Langmuir, and
Freundlich isotherms. Thus, simple pyrolysis provide conversion of sewage sludge into inexpensive low-rank adsorbent potentially
useful for the removal of heavy metals from polluted water .
Keywords: Adsorption; Heavy metals; Activated carbon; Sewage sludge; Treatment
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