New method of producing a more efficient coagulant for the treatment of water from seeds of moringa oleifera
Parfait Sagnon Hounsinou,
Fidèle Mahoudo Assogba,
Miriam Hounsinou,
Julien Adounkpè,
Lyde Sèwèdo Arsène Tomètin,
Achille Comlan Dedjiho,
Waris Kéwouyèmi Chouti,
Daouda Mama,
Joachim Djimon Gbénou,
Eléonore Yayi Ladekan
Affiliations
Parfait Sagnon Hounsinou
Faculté des Sciences et Technique (FAST), Université d'Abomey – Calavi (UAC), Bénin; Corresponding author at: Faculté des Sciences et Technique (FAST), Université d'Abomey – Calavi (UAC), Bénin. Tel.: 0022995155105.
Fidèle Mahoudo Assogba
Laboratoire de Pharmacognosie et des Huiles Essentielles, 01 BP: 918, ISBA, Cotonou, Bénin
Miriam Hounsinou
Institut de Mathématiques et de Sciences Physiques, Université d'Abomey-Calavi (UAC), Bénin; Laboratoire de Physique du Rayonnement, Faculté des Sciences et Techniques (FAST), Université d'Abomey-Calavi (UAC), Bénin
Julien Adounkpè
Département de l'Aménagement et de la Gestion de l'Environnement, Faculté des sciences agronomiques (FSA), Université d'Abomey-Calavi (UAC), Bénin
Lyde Sèwèdo Arsène Tomètin
Laboratoire KABA de Chimie et Applications, Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques (UNSTIM), Abomey BP 486, Bénin
Achille Comlan Dedjiho
Laboratoire de chimie inorganique et de l'environnement, Bénin
Waris Kéwouyèmi Chouti
Laboratoire de chimie inorganique et de l'environnement, Bénin; Laboratoire de Chimie Physique, Matériaux et Modélisation Moléculaire, Bénin
Daouda Mama
Laboratoire d'Hydrologie Appliquée (LHA), Institut Nationale de l'Eau (INE), Université d'Abomey-Calavi (UAC), Cotonou 05 BP 9148, Bénin
Joachim Djimon Gbénou
Laboratoire de Pharmacognosie et des Huiles Essentielles, 01 BP: 918, ISBA, Cotonou, Bénin; Laboratoire KABA de Chimie et Applications, Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques (UNSTIM), Abomey BP 486, Bénin
Eléonore Yayi Ladekan
Laboratoire de Pharmacognosie et des Huiles Essentielles, 01 BP: 918, ISBA, Cotonou, Bénin
The coagulation is essential in raw water treatment. The most used coagulants are often of chemical origin and expensive and their use generates non-biodegradable residues. This is why innovative studies on the synthesis of natural coagulants based on plant extracts are very important. This study presents a new method of producing a coagulant for the treatment of water from seeds of moringa oleifera. The application of the new method is done in several steps: Harvesting moringa oleifera seeds, shelling, crushing the seeds, extracting oil from moringa oleifera powder, extracting salts from powder from moringa seeds oleifera, microfiltration with a 0.2 µm filter and lyophilization which gives the final product in dry form. We used the resulting product for coagulation of lake water with an initial turbidity of 40 NTU. This treatment reduced the turbidity of the water by almost 95 % when we used 0.7 mg of this coagulant per liter of water. Moringa has previously been used to produce coagulant but the peculiarity of this study is that it takes a very small amount of the synthesized product to effectively treat water. The results of this research work have shown that the coagulant produced rom the seeds of Moringa oleifera can be used effectively for the treatment of surface water. The residual turbidity obtained after the treatment of lake water with the coagulant produced was in accordance with the drinking water standard according to the World Health Organization (WHO) (less than 5 NTU). The coagulant produced by this new method from moringa oleifera seed is an alternative to aluminum sulfate coagulant for water treatment.
