Abstract
<p class="zhengwen"><span lang="EN-GB">Adsorption of Zn(II) ions from aqueous solutions by thermally treated rice husk was investigated using factorial experimental design to study effects of heating temperature and period of rice husk, pH, initial Zn(II) ion concentration, adsorption temperature and contact time, and adsorbent dosage. Main and interaction effects of these factors were analyzed using statistical techniques and the results were analyzed statistically using the Student’s t-analysis and analysis of variance which were used to determine significant factors that affect the percentage removal of Zn(II). These significant factors were heating temperature of rice husk, pH, initial metal concentration, contact time, and adsorbent dosage. The interaction between two different effects also affects the percentage removal of Zn(II) ions. These include the interactions between heating temperature of rice husk and initial metal concentration, pH and initial metal concentration, and pH and the adsorbent dosage.</span></p>
Highlights
Rapid development of industrial and agricultural sectors coupled with the growth of population increase hazardous heavy metals released into our environment
The results indicated that heating temperature, pH, initial concentration, contact time, and adsorbent dosage are significantly affects the removal efficiency of Zn(II) ions
Percentage removal between low and high levels for all significant factors as indicated by the steep plots in the figure, which shows that the factors are highly significant
Summary
Rapid development of industrial and agricultural sectors coupled with the growth of population increase hazardous heavy metals released into our environment Heavy metals such as lead, chromium, copper, cadmium, nickel, silver, mercury, and zinc are harmful but, in many instances, they are discharged without proper treatment by manufacturers and/or users, become a major cause of water pollutions (Kilic et al, 2013). The adsorption capacity of these wastes to adsorb heavy metals could be increased with the pre-treatment (Bhattacharya et al, 2006) Agricultural wastes such as hazelnut shell (Jamali et al, 2009), pomegranate husk (El Nemr, 2009), sugarcane bagasse (Garg et al., 2009), banana peel (Anwar et al, 2010), and rice husk (Bansal et al, 2009) have been studied for these purposes.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
