Etude des propriétés d’adsorption et de désorption du Plomb (Pb) et du Cadmium (Cd) par les sédiments d’une lagune tropicale en présence d’Allylthiourée

Yao, M.; Kouassi, N’guessan Louis Bérenger

doi:10.4314/ijbcs.v9i1.41

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…Parmi les procédés de traitement des eaux polluées par les colorants organiques, l'adsorption s'avère être le plus efficace (Ertaş et al, 2010 ;Yao et Kouassi, 2015). Le charbon actif est l'un des adsorbants le plus utilisé à ce sujet (Sark et al, 2015).…”

Section: Introductionunclassified

Adsorption d’un colorant basique, Bleu de Méthylène, en solution aqueuse, sur un bioadsorbant issu de déchets agricoles de <i>Cucumeropsis mannii</i> Naudin

Kifuani¹,

Mayeko²,

Vesituluta³

et al. 2018

Int. J. Bio. Chem. Sci

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; Tel :(00243) 895879602 RESUME L'adsorption sur des bioadsorbants est un procédé courant pour éliminer les micropolluants de l'eau. Le but de notre travail est d'étudier l'adsorption du BM sur le BCM. L'adsorption du bleu de méthylène (BM) sur un bioadsorbant à base des téguments des graines de Cucumeropsis mannii Naudin (BCM) a été étudiée en réacteur discontinu. Les effets des paramètres ci-après ont été étudiés pour l'optimalisation de l'adsorption : masse de bioadsorbant, temps d'adsorption, concentration et pH de la solution de BM. La capacité ultime d'adsorption vraie a été évaluée à 89,41 mg g -1 à pH 6,67, avec une surface spécifique de 251,87 m 2 g -1 . La capacité d'adsorption augmente avec la masse de bioadsorbant à cause de la disponibilité des sites libres. L'adsorption de BM sur BCM est meilleure en milieu basique, à cause des interactions électrostatiques entre la surface du BCM chargée négativement et les cations organiques de BM. Le BM est éliminé à 80,75% dans les conditions optimales. Les isothermes obtenues sont toutes de type S. Le modèle de pseudo-ordre 1 est mieux approprié pour décrire l'adsorption de BM sur BCM, comparé au modèle de pseudo-ordre 2. L'adsorption de BM sur BCM est mieux décrite par le modèle de Langmuir. Le paramètre de séparation R L de Langmuir et le paramètre 1/n de Freundlich, inférieurs à 1, indiquent que l'adsorption de BM sur BCM est favorable. Les résultats de cette étude montrent que le BCM est un bioadsorbant potentiel pour l'élimination des colorants organiques en solution aqueuse. © 2018 International Formulae Group. All rights reserved. Mots clés:Cucumeropsis mannii Naudin, bleu de méthylène, adsorption, bioadsorbant, isothermes, cinétiques, thermodynamiques. Adsorption of basic dye, Methylene Blue, in aqueous solution on bioadsorbent from agricultural waste of Cucumeropsis Naudin mannii ABSTRACTAdsorption on bioadsorbants is a common process for the removal of micropollutants from water. The purpose of our work was to study the adsorption of the MB on the BCM. The adsorption of methylene blue (MB) on a bioabsorbent prepared from Cucumeropsis Naudin mannii (BCM)'s seed teguments has been K.M. KIFUANI et al. / Int. J. Biol. Chem. Sci. 12(1): 558-575, 2018 559 studied in a batch reactor. The effects of some optimization parameters on the adsorption, such as the mass of absorbent, absorption time, concentration and pH of the solution of MB, have been investigated. The ultimate adsorption capacity was found to be 89.41 mg g -1 , at pH 6.67, with a specific area of 251.87 m 2 g -1 . Adsorption capacity increases with the mass of the bioabsorbent, due to the availability of free sites. Adsorption of MB on BCM is higher in alkali medium because of electrostatic interactions between the negatively charged surfaces of BCM and organic cations of MB. When operational conditions are optimized, BM is removed up to 80.75% from the solution. All the experimental isotherms are S-shaped, and the pseudoorder 1 kinetic model seems to be more appropriate in this case as compa...

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Section: Introductionunclassified

Adsorption d’un colorant basique, Bleu de Méthylène, en solution aqueuse, sur un bioadsorbant issu de déchets agricoles de <i>Cucumeropsis mannii</i> Naudin

Kifuani¹,

Mayeko²,

Vesituluta³

et al. 2018

Int. J. Bio. Chem. Sci

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“…In the Ebrié lagoon, the preferred site for Cd accumulation is sediment according to the high values of Rd obtained. This means that the portion of Cd that is soluble in water is very low, according to the observation of Yao and Kouassi (2015). This also explains the non-significant variation in Cd contents obtained in the water column, despite the fact that Cd was not detected in the sediments of several sites.…”

Section: Effect Of Physico-chemical Conditions On Tilapia Fish Contammentioning

confidence: 91%

Determination of Source and Control Factors of Trace Metals (Cd, Zn, Cu, Cr, Ni and Pb) Bioaccumulation in Tilapia Fish of the Ebrié Lagoon (Côte d’Ivoire)

Cécile¹,

Aka²,

Emile³

et al. 2020

ijSciences

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Lagoon water as sources of trace metals contamination in Tilapia fish as well as the physico-chemical parameters controlling the bioaccumulation of trace metals were determined in the Ebrié lagoon. For this, trace metals contents (Cd, Zn, Cu, Cr, Ni and Pb) were measured in the water, sediments and flesh of the tilapia fish of the Ebrié lagoon. In addition, physico-chemical parameters (pH, salinity, dissolved oxygen and redox potential) were determined in the lagoon waters during two hydrological seasons: the dry season and the rainy season. The results obtained showed that the sediments of the Ebrié lagoon constituted a real trap for the studied trace metals (very high Rd). The bioaccumulation factors (BAFs) of all trace metals in lagoon water column were higher than those of the sediments, reflecting an intense bioaccumulation, from the water column (BAF water > 1> BAF sed). However for Cd, the BAF water and BAF sed values were less than 1. Zn was the most bioaccumulated metal in fish, while the lowest bioaccumulated Cd. The decrease in dissolved oxygen favored the increase of Cr contents in tilapias and the retention of Zn in sediments. The increase of the pH as well as the decrease of the redox potential had led to the decrease of the Ni contents in the Tilapias. Nevertheless, the fish flesh Tilapias of the lagoon Ebrié, was not toxic to consumers.

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“…However, determination of lead contamination level in aquatic system is important in order to control its pollution in the environment. Several studies have shown that tropical estuarine sediments were highly contaminated by Pb (Chakraborty et al, 2015;Kouassi et al, 2015;Yao and Kouassi, 2015;Chen et al, 2016;Botwe et al, 2017). However, these studies have not focused on seasonal accumulation of Pb in seaport sediments.…”

Section: Introductionmentioning

confidence: 99%

Lead concentrations in sediments and mollusc gastropod from Vridi Canal, Côte d’Ivoire

Kouakou¹,

Kouassi²,

Kouassi³

et al. 2021

Int. J. Bio. Chem. Sci

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Lead (Pb) is one of the most frequent and toxic contaminant in the environment. It can be bioaccumulated by marine organisms through contaminated sediments as well as their food chains. The current study aimed at investigating Pb occurrence in the sediments and gastropod P. haemastostoma from Vridi Canal. Sediment samples were taken using a Van Veen steel grab of 0.02 m2 area, sealed in plastic bags and transported to the laboratory at 4 °C. Gastropod P. haemastostoma species were collected manually using gloves, and then placed in polyethylene plastic bags. The different concentrations were determined using atomic absorption spectrometer Varian AA 20. The results showed seasonal variability of Pb concentrations in sediments and P. haemastostoma. In the both matrices, Pb exhibited the same trend in the distribution between the seasons. This study also mentioned that sediments were highly contaminated by Pb (54.27-134.71 mg/kg). Vridi Canal was found to be one of the most contaminated seaport area. Pb levels (49.55-104.19 mg/kg) in P. haemastostoma exceeding the maximum permitted levels according to the United Nations Food and Agriculture Organization (FAO). This research demonstrated that sediments having lower ecological risk may be resulting in lower tissue Pb of P. haemastostoma. Keywords: Metal Pb, sediment, P. haemastostoma, seasonal variation

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Etude des propriétés d’adsorption et de désorption du Plomb (Pb) et du Cadmium (Cd) par les sédiments d’une lagune tropicale en présence d’Allylthiourée

Cited by 6 publications

References 13 publications

Adsorption d’un colorant basique, Bleu de Méthylène, en solution aqueuse, sur un bioadsorbant issu de déchets agricoles de <i>Cucumeropsis mannii</i> Naudin

Adsorption d’un colorant basique, Bleu de Méthylène, en solution aqueuse, sur un bioadsorbant issu de déchets agricoles de <i>Cucumeropsis mannii</i> Naudin

Determination of Source and Control Factors of Trace Metals (Cd, Zn, Cu, Cr, Ni and Pb) Bioaccumulation in Tilapia Fish of the Ebrié Lagoon (Côte d’Ivoire)

Lead concentrations in sediments and mollusc gastropod from Vridi Canal, Côte d’Ivoire

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