4.2.1 Effects of Initial dosage on Lead Adsorption
This experiments were carried out to investigate the potential of banana peel as adsorbent for the removal of heavy metal. For this experiment, the bisorbent is untreated and less remove of heavy metal than treated biosorbent.
As can be seen from the result, at mass of 0.4g, the percent of removal was 37.38% and it gradually increase to 49.30% at 2.4g.From the result, it can be seen that the high dosage of absorbent, it more good removal absorbent to the lead. The effect of dosage show that when higher amount of banana peel are used, percentage of removal(lead) will increase.
But, the dosage of adsorbent on 0.8g and 2.8g, its have the negative on the conentration of lead. Its because the solution has contiminated. Besides that, the solution also was stirred maximully and not regularly. This results doesn’t counted in the graph and maybe should redo the experiment with carefully.
Results showed that the adsorption efficiency is highly dependent on quanttity of adsorbent added. This was expectedas with increasing concentration of adsorbent,more surfacesor in the other words, more active sites become available for metal uptake, (Jamil, 2010). But, Further increase in adsorbent dose, did not cause any significant increase in removal of metal ion. This was due to the concentration of metal ions reached at equilibrium status between solid and solution phase, (Zahra, 2013).
4.2.2 Effects of contact time on lead adsorption
Composition of the sample was conduct through ICP analysis. To begin the analysis of the effect of contact time on lead adsorption, the best dosage of adsorbent must be taken into this samples. This is important to choosen the best amount of dosage because it give the good percentage of removal.
From the result in Table 4.2, it can be seen that the trend of the percentage removal of lead was not stable. The result shows that have many negative or error for the...