ENTRAPMENT OF SEVERAL DIVALENT HEAVY METALS FROM WASTE WATER USING POLYMER CROSS LINK METHOD
Various heavy metals are widespread pollutants of water and have been known for their toxicity and potency to endanger living organisms. Various polymers with a pair of free electron have the potency to bond with metal, which two of them are alginate and chitosan that have the ability to cross link...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/64359 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Various heavy metals are widespread pollutants of water and have been known for their toxicity and potency to endanger living organisms. Various polymers with a pair of free electron have the potency to bond with metal, which two of them are alginate and chitosan that have the ability to cross link with metal by forming covalent coordinative bond. This research was done to study about the ability biopolymer sodium alginate, calcium alginate and chitosan in entrapping divalent heavy metals Cd, Pb, Cu and Zn which present in water. Optimization was done for some related parameters such as time, temperature and concentration of biopolymer. The ability of the polymer to cross link with heavy metals was quantified by calculating the entrapment efficiency. Amount of metal ions which are not entrapped by polymer were quantified by using AAS. Kitosan concentration of 0,5% could entrapped Cd metal optimally at 24 hour and temperature of 70°C with entrapment efficiency more than 98% . Calcium alginat concentration of 0,5% could entrapped Pb metal optimally at 24 hour and temperature of 50°C with entrapment efficiency more than 95%. Kitosan concentration of 0,5% could entrapped Cu metal optimally at 24 hour and temperature of 50°C with entrapment efficiency more than 97% . Natrium alginate concentration of 2% could entrapped Zn metal optimally at 24 hour and temperature of 50°C with entrapment efficiency more than 78?/0 . Subsequently, the complexes which have the best entrapment for each polymer were analyzed by FTIR to observe the chemical groups take part in cross link. FTIR spectrum showed change occurred at 1114,65 cm-1 for Cd-sodium alginate complex (C-O group), 1114,65 cm-1 for Cd-calcium alginate complex (C-O group) and 3498,24cm-1 for Cd-chitosan (—NH2 group). Results showed that sodium alginate, calcium alginate and chitosan have the ability to entrap divalent heavy metals Cd, Pb, Cu and Zn through the cross link phenomenon. |
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