Preparation and lead ion removal property of hydroxyapatite/polyacrylamide composite hydrogels

Journal of Hazardous Materials
Suk Hyun JangSang Cheol Lee

Abstract

We report the synthesis of hydroxyapatite/polyacrylamide (HAp/PAAm) composite hydrogels with various HAp contents by free radical polymerization and their removal capability of Pb(2+) ions in aqueous solutions with controlled initial Pb(2+) ion concentrations and pH values of 2-5. The swelling ratio of the composite gels in aqueous solutions decreases with increasing the HAp content in the gels. The composite gel with higher HAp content exhibits the higher removal capacity of Pb(2+) ions owing to the higher adsorption sites for Pb(2+) ions, but shows the slower removal rate of Pb(2+) ions due to the lower degree of swelling. The removal mechanism of Pb(2+) ion is very sensitive to the pH value in aqueous solution, although the removed amount of Pb(2+) ion is nearly same, regardless of pH values of 2-5. The removal mechanism, the dissolution of HAp in the composite gel and subsequent precipitation of hydroxypyromorphite (HPy), is dominant at lower pH 2-3, whereas the mechanism, the adsorption of Pb(2+) ions on the composite gel and following cation exchange reaction between Pb(2+) ions adsorbed and Ca(2+) of HAp, is dominant at higher pH 4-5. The equilibrium removal process of Pb(2+) ions by the composite gels at pH 5 is describ...Continue Reading

References

May 10, 2002·Environmental Science & Technology·Elena MavropoulosMarcelo Saldanha
Nov 9, 2002·Waste Management·Gigliola LusvardiMonica Saladini
Apr 10, 2003·Environmental Pollution·Nathalie ArnichDaniel Burnel
Aug 6, 2004·Journal of Environmental Management·M S Alhakawati, C J Banks
Aug 11, 2004·Journal of Hazardous Materials·A AklilS Sebti
Mar 9, 2005·Journal of Hazardous Materials·M MouflihS Sebti
Jun 7, 2005·Bioresource Technology·Alaa H Hawari, Catherine N Mulligan
Jul 28, 2005·Journal of Environmental Management·Yasemin Bulut, Zübeyde Baysal
Sep 8, 2005·Journal of Hazardous Materials·Ulvi Ulusoy, Selçuk Simşek
Dec 3, 2005·Bioresource Technology·Gulnaziya IssabayevaNik Meriam Nik Sulaiman

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Citations

Mar 19, 2013·Journal of Agricultural and Food Chemistry·Lihua XieLan Wu
Feb 3, 2016·International Journal of Biological Macromolecules·Yasmeen G Abou El-ReashA Abd Elrazak
Jan 29, 2013·Journal of Environmental Management·M A BarakatJ N Kuhn
Jan 1, 2012·Journal of Environmental Sciences (China)·Jilai GongXun He
Jun 29, 2010·Journal of Environmental Management·Mahamudur IslamRajkishore Patel
Jul 25, 2009·Water Research·Ozgur OzayNurettin Sahiner
Jul 31, 2012·Carbohydrate Polymers·Celile Demirbilek, Cemile Özdemir Dinç
Jun 16, 2018·RSC Advances·Kokkarachedu VaraprasadPatricio Oyarzun
Mar 2, 2019·Journal of Biomedical Materials Research. Part a·Mingchen ZhouHong Bi
Aug 17, 2019·Environmental Science and Pollution Research International·Yiping SuZuotai Zhang
Feb 10, 2021·Environmental Science and Pollution Research International·Huawei WangYiu Fai Tsang
Feb 14, 2015·Industrial & Engineering Chemistry Research·Yasmine DanielsSpiro D Alexandratos
Oct 8, 2021·Frontiers in Cell and Developmental Biology·Yanjun WangKai Wang

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