Physico-Chemical Treatment of a Wastewater Collector Loaded with Metals and Suspension Material by The Solution of Raw Carica papaya Latex

Main Article Content

Togbe Finagnon Crépin Alexis
Yete Pélagie
Yovo Franck
Wotto Valentin


The papaya (Carica papaya), of the family Caricaceae, is a tree-like tropical plant, native to Central and South America. Papaya cultivation extends to all warm and humid countries. The present study consists in using the solution of raw Carica papaya latex (SLCP) cultivated in Benin as a natural biodegradable flocculant in a physico-chemical process to treat liquid discharges loaded with metals including iron, copper, zinc, and manganese; and suspended matter, and also to test its efficiency against other products commonly used in wastewater treatment. The tests were carried out on water samples from the wastewater collector that runs through the Agla district in Cotonou.

The comparative study with a commonly used flocculant, aluminium sulphate, showed outstanding competitiveness with a high flocculation power for the solution of Carica papaya raw latex. In six water samples from the collector with average concentrations of iron, copper, zinc and manganese of 18.20 mg/L ; 2.50mg/L ; 3.80 mg/L and 3.70 mg/L respectively, the percentages of metal removal exceeded 90% for iron and manganese and around 85% for copper and zinc with the combination FeCl3 + SLCP. The NaOH + SLCP combination showed a very significant effect on the removal of metals (96% reduction) and suspended matter.

Carica papaya, raw latex, flocculant, waste water, metals.

Article Details

How to Cite
Alexis, T. F. C., Pélagie, Y., Franck, Y., & Valentin, W. (2020). Physico-Chemical Treatment of a Wastewater Collector Loaded with Metals and Suspension Material by The Solution of Raw Carica papaya Latex. International Research Journal of Pure and Applied Chemistry, 21(15), 42-49.
Original Research Article


WHO. World Health Annual Report. Geneva; 1989. French

UNDP. World Human Development Report, New York; 2006. French

Llm TK. Carica papaya. Edible Medicinal and Non-Medicinal Plants. J. 2012; 693-717. French

Rana. -ijaona HLT, Tsitomorra A, Ravoniaris lB, Andriarutsetra G. The most famous traditional magic plants of the women of the city of mahajanga. Mahajanga Madagascar. 2011;401:1-2. French

Andriaman AN, Andriamandroso A, Rakot OM. Cacarica papaya. Journal of Plant Biology. 2008;12. French

Aboualie EO, Jean, Ledion J. Influence of Copper and Zinc on the Scaling Power of Water. European Journal of Hydrology. 1996;27:109-126. French

Kholtei S, Bouzidi A, Bononi M, Fekhaoui M, Sbai K, Anan R, Creppy EE. Contamination of Groundwater in the Berrechid Plain in the Chaouia Region, Morocco, by Metals Present in Wastewater: Effect of Rainfall. Environment vector. 2003;36:68-80. French

Edeline F. The Physico-Chemical Purification of Water, Theory and Technology. Cebedoc. 1993:4th Edition, Paris. French

Katsoyiannisa IA, Zikoudib A, Huga JS. Arsenic removal from groundwaters containing iron, ammonium, manganese and phosphate: A case study from a treatment unit in northern Greece. Desalination. 2008;224:330- 339.

Boon HT, Tjoon TT, Mohd OAK. Removal of dyes and industrial dye wastes by magnesium chloride. Water Res. 2000;34:597-601.

Bosea P, Reckhow DA. The effect of ozonation on natural organic matter removal by alum coagulation. Water Res. 2007;41:1516-1524.

Christopher WKC, van Leeuwena JA, Rolando F, Mary D. Optimised coagulation using aluminium sulfate for the removal of dissolved organic carbon. Desalination. 2009;245:20- 134.

Jian-Jun Q, Maung HO, Kiran AK, Frans K, Peter M. Impact of coagulation pH on enhanced removal of natural organic matter in treatment of reservoir water. Sep. Purif. Technol. 2006;49:295-298.

Lopoukhine M. The treatment of iron and manganese in mineral waters. Rap. BRGM; 1999. French

El Araby R, Hawasha S, El Diwania G. Treatment of iron and manganese in simulated groundwater via ozone technology. Desalination. 2009;249:1345-1349.

L. Lacourcelle. Treatise on Galvanotechnics. Galva-conseil, France; 1996.

Bao-Yu G, Qin-Yan Y, Yan W, Wei-Zhi Z. Color removal from dye-containing wastewater by magnesium chloride. J. Approx. Manage. 2007;82:167-172.

Bawa LM, Djanéyé-Boundjou G, Soulémane AG, Kpékpassi L. Study of the clarification of surface water by a natural substance (extracts of Moringa oleifera Lam): Impact on chlorine demand. Phys. Chem. News. 2008;42:133-138. French

Matilainen A, Vepsäläien M, Sillanpää M. (2010) Natural organic matter removal by coagulation during drinking water treatment. A review. Adv Colloid Interface Sci; 2010.
Available:https: // doi: 10.1016 / j.cis. 2010.06.007

Benzaizoune S, Yatribi A, Achour B, Srhiri A. Raw Wastewater Purification Test by a Rooted Aquatic Plant under Temperate Climate: Case of the Reed. Watmed2-Marrakech; 2005. French.

Decree n ° 2001/109 of April 4, fixing the quality standards of wastewater in the Republic of Benin. (15 May 2020).

Rezeg, Achour S. Water Mineralisation Index in the Elimination of Aromatic Organic Acids by Coagulation Flocculation. Watmed2- Marrakech; 2005. French.