Equilibrium Studies of Methylene Blue Dye Sorption by Dried Water Hyacinth Shoot

Abstract

Water hyacinth (Eichhornia crassipies) has proved to be a menace in water bodies and studies are on, in the direction of solving this problem; one of which is to discover economic uses of water hyacinth. Adsorption of heavy metals and dyes from aqueous solutions by activated carbon derived from water hyacinth is one of such studies. In this study, dried and pulverized water hyacinth shoot was used for the sorption studies. This is in the bid of eliminating the rigours of producing activated carbon, thereby saving time and cost. The adsorption capacity of water hyacinth shoot for Methylene Blue dye was studied as a function of initial metal ion concentration in a batch system. Results showed that adsorption increased with methylene blue dye concentration. Seven adsorption isotherms, namely Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Florry-Huggins, Harkins-Jura and Henry's isotherms were applied to the adsorption data. Isotherm parameters showed that all the isotherms correlated well with the adsorption data. The maximum adsorption capacity of Methylene Blue dye to the dried water hyacinth shoot was found to be 58.14mg/g. The use of dried water hyacinth shoot would appreciably save the time and cost for producing activated carbon but not without some compromise of efficiency.

Utilizing Composites of Environmental Noxious Waste Materials for Decontamination of Heavy Metal Ions in Solution

“…From the R 2 values of the graphs, experimental outcome better fits the Langmuir model for all except Pb (12:1 in figure 16), more than Freundlich model. The Langmuir isotherm describes a saturated monolayer (chemisorption) adsorption of an adsorbate on a homogeneous leveled plane of an adsorbent; in addition individual adsorptive location can just be occupied once in a one-on-one manner [34], [37], [38], [29]. The linear form of the Langmuir equation is as in equation 4Ce/Qe=1/KlQm+Ce/qm (4)…”

Biosorption of Bromo-based Dyes from Wastewater Using Low-Cost Adsorbents: A Review

“…Effluents released from various dye-using industries are harmful to the ecosystem, and subsequently, the need to remove dye from the water [1]. The textile industry contributes about 22% of the total volume of industrial wastewater generated in Nigeria [2]. The release of dyes and other pollutants into water bodies by industries is undesirable and poses serious environmental challenges to the entire ecosystem.…”