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Jurgita Seniūnaitė, Rasa Vaiškūnaitė, Violeta Bolutienė
Coffee grounds as an adsorbent for copper and lead removal form
aqueous solutions
| Conference Information: |
9th International Conference on Environmental
Engineering, MAY 22-23, 2014 Vilnius, LITHUANIA |
| Source: |
ICEE-2014 - International Conference on Environmental
Engineering |
| Book Series: |
International Conference on Environmental Engineering
(ICEE) Selected papers |
| ISSN: |
ISSN 2029-7092 online |
| ISBN: |
978-609-457-640-9 / 978-609-457-690-4 CD |
| Year: |
2014 |
| Publisher: |
Vilnius Gediminas Technical University Press Technika |
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Abstract
Water contamination is an actual problem around the world. The main source of contaminated water is the industry. Industrial wastewater
is contaminated with hazardous substances such as heavy metals (Cu, Pb, Zn, Cd, Cr and etc.) and petroleum products. Wastewater
technology is various, one of them – the biological sorption. In this study, removal of copper (Cu) and lead (Pb) from contaminated
aqueous solutions has been investigated by using coffee grounds as a natural adsorbent. The research is a bench scale experiment type and
analysis have performed by using different fractions (>200 µm and <200 µm particle size) of adsorbent in solutions with four (0.5, 1.0,
1.5 and 3.0 mg/L) different concentrations of both metal. Studies showed that coffee grounds are great adsorbent for heavy metal removal
from aqueous solutions. Using the >200 µm fraction of coffee grounds for copper removal the treatment efficiency is 85.9% when the
metal concentration is 0.5 mg/L, while the lead is 87.2%. Increasing metal concentration in the solution of the adsorbent treatment
efficiency decreases to 71.76% for Cu and 86.76 % for Pb. When the smaller fractions (>200 µm) are used in coffee grounds treatment
efficiency increases by 6–1 1% for copper, and 8–9% for lead.
Keywords: adsorbtion; coffe grounds; copper; lead; aqueous solution.
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