Adsorption of Lead (II) and Copper (II) Ions from Mono Synthetic Aqueous Solutions Using Bio-Char from <i>Ficus natalensis</i> Fruits — Oak Academic Publishing
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Adsorption of Lead (II) and Copper (II) Ions from Mono Synthetic Aqueous Solutions Using Bio-Char from <i>Ficus natalensis</i> Fruits
St. Joseph’s Secondary School, Butenga, Masaka, Uganda
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Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
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Department of Science, Bugema University, Luweero, Uganda
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Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
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Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
1 St. Joseph’s Secondary School, Butenga, Masaka, Uganda
2 Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
3 Department of Science, Bugema University, Luweero, Uganda
4 Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
5 Department of Chemistry, Mbarara University of Science and Technology, Mbarara, Uganda
Many science-based institutions in most developing countries use heavy metal containing salts in practical teaching sessions. The commonly used chemicals are the salts of lead (II) and copper (II) and the wastes generated end up into the environment when untreated. Thus, a study was done to remove lead (II) and copper (II) ions from mono synthetic aqueous solution using bio-char from <i> Ficus natalensis </i> fruits (FNF). This was done at varied pH, contact time, temperature, bio-char dosage level, salinity and metal ion concentration using the batch approach. The residual metal concentrations were determined using the atomic absorption spectrophotometer. The optimum pH for the adsorption of copper (II) and lead (II) ions was found to be 4.0 and 5.0 respectively. The maximum percentage adsorption of copper (II) and lead (II) by the FNF bio-char was established at 60 minutes contact time, 47.5 °C and 0.4 g adsorbent dose. Increase in the metal ion concentration and the presence of interfering ions in the aqueous solution lead to decrease in the percentage adsorption. The highest adsorption capacity was found to be 161.29 mg/g and 1250 mg/g for copper (II) and lead (II) ions respectively. The thermodynamic parameters indicated the feasibility of the adsorption of copper (II) and lead (II) on the bio-char of FNF. Thus, bio-char from FNF may be used as an adsorbent in waste management where copper (II) and lead (II) ions are present at a concentration range of between 5 and 100 mg/l .
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