STUDY OF PB2+ ION ADSORPTION ON LAMPUNG NATURAL ZEOLITE
Pb2+ ion is the most abundant environmental pollutant in the environment. One way to reduce the level of heavy metal ions is to use an adsorption method to separate heavy metals from polluting waste. In this study, the adsorption of Pb2+ ions were carried out using natural zeolite obtained from Lamp...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/63286 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Pb2+ ion is the most abundant environmental pollutant in the environment. One way to reduce the level of heavy metal ions is to use an adsorption method to separate heavy metals from polluting waste. In this study, the adsorption of Pb2+ ions were carried out using natural zeolite obtained from Lampung, Indonesia. Zeolite has a porous surface with a negatively charged mainframe that allows the exchange of heavy metal cations with cations in the zeolite. The ability of zeolite as adsorbent was investigated for adsorptive removal of Pb2+ ions from solutions with pH variations ranging from 1 to 5, concentration variations ranging from 10 to 1000 ppm, contact time of 5 minutes, and temperature variations of 30°C, 40°C, and60°C. The optimal condition occurred at pH 4 and a contact time of 30 minutes. The adsorption process followed the Langmuir isotherm model with R2 of 0.983 and qmax of 53.927 mg g-1. The kinetic model follows a pseudo-first order with R2 of 0.9332 and k1 of 0.043. The adsorption is an endothermic reaction (?H ° = 58.05 KJ/mol), which has a randomness (?S° = 234.29J/K.mol) and occurs spontaneously (?G° is negative). Physical characterization before and after adsorption using FTIR produced peaks in the range of wave numbers 420-500 cm-1, 950-1250 and 3250-3750 cm-1. The first correlated with bending and rotation of O-T-O, while the second correlated with stretching vibrations of T-O-T and the third correlated with hydroxyl groups. wave number correlated with hydroxyl groups. XRD diffractogram results indicate a degree of crystallinity of 41.53%. It is known that themain type of zeolite used is MOR (mordenite). SEM-EDS characterization showed the difference in morphology of natural zeolite before and after adsorption and the Si/Al ratio in natural zeolite was 4.42. |
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