Abstract
In the present study, the adsorption of Pb (II) and Cd (II) ions from aqueous solution of lead (II) nitrate and cadmium chloride onto carbonized sugarcane bagasse was investigated. The physicochemical attributes of the adsorbent were: bulk density =0.58 g/mL, Ash content =21%, Attrition =31.33% and moisture =0.79%. The effects of adsorption dosage, effect of concentration, effect of ion concentration, effect of adsorbent contact time and effect of pH was discussed and detailed. Batch adsorption experiments revealed that the amount of ion adsorbed decreased with increase in adsorbent dosage; the effect of concentration on ion uptake increased with increase in concentration; there was a rapid increase in amount adsorbed as contact time increased with maximum adsorption reached at 80 minutes before subsequent reduction. The effect of pH showed that there was effective removal of ions at acidic pH than in alkaline pH level. The linearized form of Langmuir model revealed isotherm parameters that confirmed the sorptive capacity of the sugarcane bagasse and thus fit for heavy metal remediation from aqueous solution. Besides, the adsorption isotherm indicated that the adsorption occurred at homogeneous sites and form a monolayer. The Langmuir model was also able to explain the sorption equilibrium with maximum biosorption capacity.
Highlights
Industrialization and increasing urbanization have led to amplified levels of industrial pollutions which result to significant ecosystem destruction with high pollutant concentrations of organic compounds and heavy metals in water resources [1]
This work was aimed to evaluate the adsorption of Cd (II) and Pb (II) unto carbonized sugarcane bagasse from aqueous solution
The Ash content of sugarcane bagasse is the residue that remains after all the combustible matter in it has been completely burned off and it is a chemical property relating to quality indexing
Summary
Industrialization and increasing urbanization have led to amplified levels of industrial pollutions which result to significant ecosystem destruction with high pollutant concentrations of organic compounds and heavy metals in water resources [1]. Industrial activities produce a large percentage of the pollutants that affect our environment and especially for water [4] This is so because these industrial processes employ significant chemical inputs coupled with the inefficient in the use of the resource components. The poor efficiency of the treatment techniques employed for effluent treatment in these industries mean that pollutants are significantly present in treated discharged effluents. These pollutants include organic and inorganic pollutants amongst which are heavy metal ions, phosphates, sulphates, organic and hydrocarbon compounds [6]. Heavy metals do not biodegrade, implying that their toxic impacts will remain over extended periods of time [7]
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