ABSTRACT: Humin was isolated
from the Baturraden resin forest and purified use mixture of HCl:HF. Purified
humin is characterised such as identify of functional group of humin,
stipulating of water content, stipulating of dust content, obstetrical
stipulating of total acidity content, carboxylic and OH phenolic functional
group. The adsorption of rodamin by humin measured by UV-Visible
spectrophotometer at maximum wavelength of rodamin B liquid, optimum pH and
optimum contact time to determine absorbtion capacities and isotherm adsorption
pattern .Humin that isolated from Baturraden resin forest have characteristic
such as water content 16.6199 %; dust content 9.2050 %; total acidity content
475 cmol / Kg; carboxylic rate 200 cmol/Kg, and OH phenolic rate 275 cmol/Kg.
Maximum wavelength of rodamin B is 554 nm and optimum contact time of
adsorption rodamin B by humin is 180 minute with optimum pH 4. Adsorption rodamin
B by humin follows the pattern of Langmuir isotherm adsorption with the value
of R2 is 0.9801 and absorption capacities is 39,5257 mg/g.
Key words: Rodamin B, Humin,
isolation
Penulis: Tien Setyaningtyas
dan Roy Andreas
Kode Jurnal: jpkimiadd070016
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