E-Waste Recycling Activities In Global Production And Removal Of Precious And Toxic Metals From Contaminated Water And Soil For Environmental Safety: A Review

IJEP 41(7): 827-833 : Vol. 41 Issue. 7 (July 2021)

Renu Nayar*

D.P. Vipra College, Department of Chemistry, Bilaspur, India

Abstract

Electronic waste components contain acids, toxic metals and hazardous compounds that may cause health problems and pollute our atmosphere. it is created from anything which is electronic: computers, TV’s, monitors, cell phones, vcrs, cd players, fax machines, printers, household equipment’s, like vacuum cleaner, microwave/ovens, washing machines, air conditioners, etc., and some smart devices, such as iPhone, iPad, watches, kindles, chromium tablet, etc. most electronics that are improperly thrown away contain some form of harmful materials, such as lead, copper, cadmium, mercury, beryllium, lithium, barium, nickel, chromium and carcinogenic chemicals which affect the environment and human life. These heavy metals can leach through the soil to reach groundwater which eventually runs to the surface water causing harmful effects to the entire biota either directly or indirectly. Many of these e-waste products can be reused, refurnished, or recycled. Therefore, in the present work, a critical review on environmental effects and removal of toxic metals derived from e-waste recycling activities have been planned. In the present work, the release of these toxic chemicals have been studied and possible remediation processes are discussed.

Keywords

Electrical waste, Toxic metals and compounds, Environment, Recycling activities

References

  1. Tansel, B. 2017. From electronic consumer products to e-waste : Global outlook, waste quantities, recycling challenges. Env.Int., 98:35-45.
  2. Chen, C., et al. 2017. Understanding compulsive smartphone use : An empirical test of a flow-based model. Int. J. Information manage., 37(5):438-454.
  3. Dharini, K., et al. 2017. IOP Conf. Series. Earth Env. Sci., 80012057.
  4. Schmidit, C.W. 2002. E-junk explosion. Env. Health Perspect., 110:A188-A194.
  5. Schmidt, C.W. 2006. Unfair trade : E-waste in Africa. Env. Health Perspect., 114: A 232-A 235.
  6. Ha, Nguyen Ngoc, et al. 2009. Contamination by trace elements at e-waste recycling sites in Bangalore, India. Chemosphere. 76:9-15.
  7. Pradhan and Kumar. 2014. Informal e-waste recycling : Environmental risk assessment of heavy metal contamination in Mandoli industrial area, Delhi, India. Env. Sci. Poll. Res. Int., 21(13):7913-7928. DOI: 10.1007/s11356-014-2713-2.Epub 2014 Mar 22.
  8. Akortia, et al. 2017. Soil concentration of polybrominated diphenyl ethers and trace metals from an electronic waste dump site in the Greater Accra region, Ghana. Implications for human exposure. Ecotoxicol. Env. Safety. 137:247-255.
  9. Fogarasi, S. 2012. Eco-friendly leaching of base metals from waste printed circuit boards : Experimental study and mathematical modeling. In Stud. Univ. Babes-Bolyai Chemia. pp 91-100.
  10. Meskers, et al. 2009. Impact of pre-processing routes on precious metal recovery from PCs. European metallurgical conference (EMC). Innsbruck, Austria.
  11. Dhawan, N., et al. 2008. Recovery of metals from electronic scrap by hydrometallurgical route. Global symposium on Recycling, waste treatment and clean technology (REWAS). Cancun, Mexico. Proceeding, pp 693-698.
  12. Wu, K., et al. 2015. Heavy metal contamination of soil and water in the vicinity of an abandoned e-waste recycling site : Implications for dissemination of heavy metals.
  13. Wong, et al. 2007a. Trace metal contamination of sediments in a e-waste processing village in China. Env. Poll., 145:434-442.
  14. Wong, et al. 2007b. Evidence of excessive release of metals from primitive e-waste processing in Guiyu, China. Env. Poll., 148:62-72.
  15. Wong, et al. 2007c. Export of toxic chemicals-A review of the case of uncontrolled electronic-waste recycling. Env. Poll., 149:131-140.
  16. Leung, et al. 2008. Heavy metals concentrations of surface dust from e-waste recycling and its human health implications in southeast China. Env. Sci. Tech., 42:2674-2680. Doi:10.1021/es07187zx.
  17. Ha, et al. 2009. Contamination by trace elements at e-waste recycling sites in Bangalore, India. Chemosphere. 76:9-15.
  18. Atiemo, M. National Nuclear Research Institute, Ghana Atomic Energy Comission.
  19. Brigden, K., et al. 2008. Chemical contamination at e-waste recycling and disposal sites in Acera and Koforidua, Ghana. Greenpeace laboratories technical note. pp 1-23.