Masters thesis, Universiti Malaysia Sarawak. Heavy metals contamination in water bodies is a very common environmental issue especially in industrial area. There are many ways for removing heavy metals from water body but most of them are either expensive, or inefficient. Adsorption is a preferred technology for removal of heavy metals especially when the adsorbent are made of cheap precursor. In this study, coconut shell charcoal and palm kernel shell charcoal were converted into modified charcoal via acid-base modification.
Batch experiments were performed to investigate the adsorption capacity of palm kernel shell and coconut shell charcoal in removing heavy metals namely chromium, nickel and copper from aqueous solution. If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation.
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copies of this thesis in rnicrofoxm, thesis nor substantid extracts from it Presence of lead, a heavy metal in the environment has been a senous cconcem . This Thesis is brought to you for free and open access by the Electronic Adsorption of Heavy Metals on Activated Carbons: Special Emphasis.
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New Titles. Pick and Choose. Literature Updates. For Members. For Librarians. RSS Feeds. Chemistry World. Education in Chemistry. Open Access. However, these values are equal to the permissible limits for tomato plants 0. For complete removal of Co ion, the two batch adsorbers were used in series to adsorb the Co ion with 3 g adsorbent mass in each adsorber where the adsorbent and adsorbate mixture was kept together on an agitator for 3 h in the first adsorber followed by separation of solution from the adsorbent by filtration.
Then this solution was put into the second adsorber with the fresh adsorbent 3 g in 50 mL of filtrate from first adsorber , mixed and kept together on an agitator for 3 h. The analysis of filtrate solution from the second adsorber was free of Co ion after treatment. The experimental setup is shown in Fig. The adsorption of metal ions on the bentonite clay is the result of the electrostatic attraction between the negative sites of clay and the positive metal ions. The number of negative sites on the bentonite clay surface is mainly due to presence of silica Elliott and Huang, Similar results were reported by Erdem et al.
Their results showed that natural zeolites hold great potential to remove cationic heavy metal species from industrial wastewater. In the case of roasted date pits, where the date pits have chemical functional groups such as carboxylic COOH groups.
Because pH of solution affects the charge on the functional groups. Functional groups such as carboxylate are protonated at low pH values and are thus repulsive towards metal ions Banat et al. Therefore, with an increase in pH of solution, deprotonation of the functional groups might have occurred which allowed metal ion binding.
Because, the metal ions has attraction with the negative charge on the functional groups of the date pits, such as carboxylate with a pH value of 7. It was , therefore, observed that both the bentonite clay and the roasted date pits have good potential to remove these heavy metal ions from the industrial wastewater. The study results agree with those of Kadirvelu et al. They reported that the percent adsorption increased with increase in pH from 2 to 6 and remained constant up to The heavy metals concentration levels in the industrial wastewater in Riyadh city were above the permissible concentrations levels.
The heavy metals concentrations level after treatment was within the permissible limits for crop production.
The experiment showed an excellent potential of these local adsorbents for removing heavy metals from industrial wastewater in Riyadh, Saudi Arabia. Overall, the adsorption of metal ions on the negative sites of the bentonite and the functional groups of the date pits could be attributed to the electrostatic attraction between the negative charge of the adsorbents and the positive charge on metal ions.
Subscribe Today. Science Alert. All Rights Reserved. Research Article. Saad A. Similar Articles in this Journal. Search in Google Scholar. How to cite this article: Saad A. Al-Jlil , Trends in Applied Sciences Research, 5: DOI: Table Mean chemical analysis of local bentonite clay and roasted date pits by XRF.
Mean surface area and pore characteristics of bentonite clay and roasted date pits.
Comparison of heavy metals concentration in the treated wastewater for crop production. Abdulkarim, M. Abu-Al-Rub, Adsorption of lead from aquaeous solution onto activated carbon and chemically-modified activated carbon prepared from date pits.
Alsewailem, Saudi Arabian clays for lead removal in wastewater. Applied Clay Sci.
Al-Asheh and D.