Elimination of arsenic contamination from water using chemically modified wheat straw

Autor:	Amir Hoshang Barati, Roya Ebrahimi, Hiua Daraei, Behzad Shahmoradi, Afshin Maleki, Amir Hossein Mahvi, Akbar Eslami
Rok vydání:	2013
Předmět:	Sodium bicarbonate Aqueous solution Metal ions in aqueous solution Inorganic chemistry Arsenate chemistry.chemical_element Ocean Engineering Straw Pollution Arsenic contamination of groundwater chemistry.chemical_compound Adsorption chemistry Arsenic Water Science and Technology
Zdroj:	Desalination and Water Treatment. 51:2306-2316
ISSN:	1944-3986 1944-3994
DOI:	10.1080/19443994.2012.734675
Popis:	Presence of arsenic in natural water resource as a common contaminant has always been a great concern for the scientists. The objective of this study was to explore the possibility of wheat straw modified with sodium bicarbonate (NaHCO3) for removing arsenate from aqueous solution. Adsorption process was accomplished in a laboratory-scale batch with emphasis on the effect of various parameters such as pH, contact time, arsenic concentration, and adsorbent dosage on the adsorption efficiency. In order to understand the adsorption process, sorption kinetics and equilibrium isotherms were also determined. It was found that adsorption of the arsenic is influenced by several parameters such as arsenic initial concentration, adsorbent dosage, and solution pH. Maximum adsorption efficiency was achieved at a pH of 7. The equilibrium adsorbed amount also increased with the initial concentration of the metal ions, as expected. NaHCO3 was used to modify wheat straw and scanning electron microscopy images sh...
Databáze:	OpenAIRE
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