6th International Young Scientist Congress (IYSC-2020) will be Postponed to 8th and 9th May 2021 Due to COVID-19. 10th International Science Congress (ISC-2020).  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Adsorption Studies of Zn (II) ions from Wastewater using Calotropis procera as an Adsorbent

Author Affiliations

  • 1Department of Chemistry, Jai Narain Vyas University, Jodhpur, Rajasthan, INDIA

Res. J. Recent Sci., Volume 1, Issue (ISC-2011), Pages 160-165,(2012)


Increased industrialization and human activities have impacted on the environment through disposal waste containing heavymetals. The presence of heavy metals in the environment can be detrimental to a variety of living species. Metals can bedistinguished from other toxic pollutants, because these are non biodegradable, may undergo transformation, and can have a largeenvironmental, public health, and economic impact. The presence of toxic heavy metal contaminants in aqueous streams, arisingfrom the discharge of untreated metal containing effluents into water bodies, is one of the most important environmental issues.Zinc is an essential mineral, but too much is not beneficial. Symptoms of zinc toxicity include nausea/vomiting, fever, cough,diarrhea, fatigue, neuropathy and dehydration. Adsorption technique is one of the most important technologies for the treatment ofpolluted water from zinc, but seeking for the low-cost adsorbent is the target of this study. Removal of zinc studied using adsorbentprepared from poly vinyl activated charcoal of calotropis procera leaves (PVAC-CP). Batch adsorption experiments performed byvarying adsorbent dose, pH of the metal ion solution and contact time. Adsorption of zinc is highly pH dependent and the resultsindicate that the maximum removal (85.8%) took place at dose 15gm/l in the pH range of 6 and initial concentration of 60 ppm.Kinetic experiments reveal that the dilute zinc solution reached equilibrium within 105 min. the adsorbent capacity was alsostudied the zinc adsorption followed both the Langmuir and Freundlich equation isotherms. Comprehensive characterization ofparameters indicates that PVAC-CP to be an excellent material for adsorption of zinc ion to treat wastewater containing lowconcentration of the metal.


  1. Akporhonor E.E. and Egwaikhide P.A., ScientificResearch and Essay, 2(4), 132-134 (2000)
  2. Tiwari R. P., Bala Ramudu P., Srivastava R.K., GuptaM.K., Iran, J. Environ., Health. Sci, Eng., 2007, 4(3),139-146 (2007)
  3. Broadley M.R., White P.J., Hammond J.P., Zelko I. andLux A., Zinc in plants, New Phytologist, 173(4), 677(2007)
  4. Hambidge K.M. and Krebs N.F., Zinc deficiency: aspecial challenge, J. Nutr. 137(4) (2007)
  5. Iqbal Ahmad, J.Appl. Sci. Enviorn.Mgt., 9(1), 123-126(2005)
  6. Kadirvelu K., Thamaraiselvi K. and Namasivayam C., Bioresource Techn., 76, 63-65 (2001)
  7. APHA, AWWA Standard Methods for Examination ofwater and wastewater 19th Edition Washington DC, (1994)
  8. Chand S., Aggarwal V.K. and Kumar P., Removal ofHexavalent Chromium, (1994)
  9. From the Wastewater by Adsorption. Indian J Environ.Health, 36(3), 151-158 (2000)
  10. World Health Organization, Geneva, Guidelines fordrinking Water Quality, (1984)
  11. Lanouette K.H., Heavy Metals Removal, Chem. Eng.,84(21) 73-80 (1977)
  12. Freundlich H., Colloid Capillary Chemistry (London;Metheun), (1926)
  13. Langmuir I J, J., Amer. Chem. Society, 40, 1361 (1918)