Abstract
Egg shell, which is a waste material emerging out in large quantities from poultries, homes and restaurants, may be used as a good adsorbent for heavy metals. Different types of eggshells were used in this study for the adsorption of a major pollutant such as iron from surface water. Effect of CaCO3 content in the egg shell, particle size, contact time, temperature and shaking on adsorption were also studied. The adsorption isotherms fitted by the Langmuir model revealed that the adsorption of iron by eggshell samples was monolayer adsorption.
Highlights
Industrial effluents, greenhouse effect, pharmaceutical products, volatile organic compounds, biological contamination, Radiological elements and many human activities contaminated rivers and lakes making the environmental conservation a difficult task Ghrefat et al (2014), Cooper and Harrison (2009), Pal et al(2014), Alireza et al (2010)
Researches revealed that eggshells may be used as a fertilizer and a good adsorbent for heavy metals and organic compounds Chojnacka (2005), Rais and Shaziya (2012), Ziad and Madhloom (2016), Misau et al (2012), Agarwal and Gupta (2014), Nasir et al (2016), Alok et al (2016) Egg shell contains carbonates, sulphates and phosphates of calcium and magnesium along with other organic and inorganic matters Tsai et al (2006), Nakano (2003), Balaz (2014)
Eggshell powder is a cheap, natural adsorbent material used for removal of different heavy metals from water by adsorption which becomes a solution for the increasing eggshell waste a day
Summary
Industrial effluents, greenhouse effect, pharmaceutical products, volatile organic compounds, biological contamination, Radiological elements and many human activities contaminated rivers and lakes making the environmental conservation a difficult task Ghrefat et al (2014), Cooper and Harrison (2009), Pal et al(2014), Alireza et al (2010). There are several methods for the purification of water like ion exchange Alexandratos (2009), Strathmann (2010), membrane treatment Charcosset (2009), reverse osmosis Park and Hu (2010), use of biologically active carbon filtration Branda et al (2005), magnetic separation Jianxin et al (2007) and adsorption using chemical adsorbents Jiuhui (2008), Chen et al (1987), Rahman et al (2012). All these methods were costly and not environmentally friendly. Effect of CaCO3 content in the egg shell, particle size, contact time, temperature and shaking on adsorption were studied
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