Rapid removal of heavy metal ions from aqueous solutions by low cost adsorbents

Ali Ahmadpour, Tahereh Rohani Bastami, Masumeh Tahmasbi and Mohammad Zabihi

International Journal of Global Environmental Issues, 2012, vol. 12, issue 2/3/4, 318-331

Abstract: In the present investigation, different agricultural solid wastes namely: eggplant hull (EH), almond green hull (AGH), and walnut shell (WS), that are introduced as low cost adsorbents, were used for the removal of heavy metals (cobalt, strontium and mercury ions) from aqueous solutions. Activation process and/or chemical treatments using H₂O₂ and NH₃ were performed on these raw materials to increase their adsorption performances. The effectiveness of these adsorbents was studied in batch adsorption mode under a variety of experimental conditions such as: different chemical treatments, various amounts of adsorbents, initial metal-ion concentrations, pH of solutions, contact times, and solution temperatures. High metal adsorption efficiencies were achieved for all cases only in the first two to three minutes of adsorbents' contact time. Maximum adsorption capacity of AGH sorbent for cobalt and EH for mercury were found to be 45.5 mg/g and 147.06 mg/g, respectively. The adsorption capacity of mercury for WS was also obtained as 151.5 and 100.9 mg/g for two different treated sorbents.

Keywords: environmental pollution; heavy metals; heavy metal removal; low cost adsorbents; aqueous solutions; agricultural solid waste; eggplant hulls; almond green hulls; walnut shells; cobalt; strontium; mercury; water quality; water pollution; adsorption. (search for similar items in EconPapers)
Date: 2012
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.inderscience.com/link.php?id=49374 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ids:ijgenv:v:12:y:2012:i:2/3/4:p:318-331

Access Statistics for this article

More articles in International Journal of Global Environmental Issues from Inderscience Enterprises Ltd
Bibliographic data for series maintained by Sarah Parker ().