Published November 4, 2015
| Version 10003297
Journal article
Open
Use of Carica papaya as a Bio-Sorbent for Removal of Heavy Metals in Wastewater
Authors/Creators
Description
The study assessed the effectiveness of Pawpaw
(Carica papaya) wood in reducing the concentrations of heavy
metals in wastewater acting as a bio-sorbent. The following heavy
metals were considered; Zinc, Cadmium, Lead, Copper, Iron,
Selenium, Nickel and Manganese. The physiochemical properties of
Carica papaya stem were studied. The experimental sample was
sourced from the trunk of a felled matured pawpaw tree. Wastewater
for experimental use was prepared by dissolving soil samples
collected from a dump site at Owerri, Imo state of Nigeria in water.
The concentration of each metal remaining in solution as residual
metal after bio-sorption was determined using Atomic absorption
Spectrometer. The effects of pH and initial heavy metal concentration
were studied in a batch reactor. The results of Spectrometer test
showed that there were different functional groups detected in the
Carica papaya stem biomass. There was increase in metal removal as
the pH increased for all the metals considered except for Nickel and
Manganese. Optimum bio-sorption occurred at pH 5.9 with 5g/100ml
solution of bio-sorbent. The results of the study showed that the
treated wastewater is fit for irrigation purpose based on Canada
wastewater quality guideline for the protection of Agricultural
standard. This approach thus provides a cost effective and
environmentally friendly option for treating wastewater.
Files
10003297.pdf
Files
(324.5 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:0c776089102d663478c1d85628105198
|
324.5 kB | Preview Download |
Additional details
References
- Volesky, B. (1994) Advances in biosorption of metals: selection of biomass types. FEMS Microbiology Reviews. (14): 291-302.
- Gadd, G.M. (1993) Interactions of fungi with toxic metals. New Phytologist. 124:25-60
- Weng, J. and Chen, J. P. (2006) Biosorption of heavy metals by Saccharomyces cerevisiae: a review. Biotechnol. Adv. 24: 427-451.
- Kapoor, A. and Viraraghavan, T. (1995). Fungal biosorption- an alternative treatment option for heavy metal bearing wastewaters: a review. Bioresourse. Technol. 53: 95-206.
- Nwala G. N., 1990. The removal of heavy-metal ions from aqueous solutions by using dried activated carbon, 7-10.
- Nriagu, J. O. (1989). A global Assessment of Natural Sources of Atmospheric Trace Metals, Nature, 338: 47-49.
- Weng, J. and Chen, J.P. (2006) Biosorption of heavy metals by Saccharomyces cerevisiae: a review. Biotechnol. Adv. 24: 427-451.
- Vijayaraghavan, K. and Yun, Y.S. (2008) Bacterial biosorbents and biosorption. Biotechnol. Adv. 26: 266-291.
- Gupta, R., Ahuja, P., Khan, S., Saxena, R. K. and Mohapatra, H. (2000) Microbial biosorbents: meeting challenges of heavy metal pollution in aqueous solutions. Curr. Sci. 78: 967-973.990). [10] Dick, G. (2003). "Papaya": A tantalising taste of the Tropics. Maricopa County Master Gardener Volunteer information, University of Arizona Cooperative Extension. www.papaya Maricopa-hort@ag.arizo.edu. [11] Ezeigbo C.U. (1990): "A Doppler Satellite Derived Datum for Nigeria". Acta Geodaetica Geoph. Mont. Hung., Journal of Hungarian Academy of Science, Akadémiai Kiadó, Budapest. Vol. 25 (3 – 4), pp. 399 – 413 (1990). [12] Saeed, A., Waheed Akhter, M. and Iqbal, M. 2005. Removal and recovery of heavy metals from aqueous solution using papaya wood as a new biosorbent. Sep. Purif. Technol. 45, 25–31.