STUDI PENGARUH PERBANDINGAN REAKTAN LIGNIN NaHSO3 DAN pH TERHADAP NATRIUM LIGNOSULFONAT (NaLS)
ABSTRACT: Lignin was isolated
from waste black liquor of soda pulping process. Sulfonation of soda ligninproduced
Sodium Lignosulfonate (NaLS) which can be used as dispersants, and concrete admixtures.
In this research, sulfonation was carried out towards lignin with ratio of
lignin-NaHSO3 of .0:0.4; 1.0:0.5; and 1.0:0.6, and initial pH of 5.00; 6.00;
7.00. Parameters observedwere purity, final pH, and yield of NaLS. The upsurge
of initial pH increased the final pH and NaLS yield, but decreased its purity.
The upsurge of ratio of lignin-NaHSO3 increased NaLS yield and decreased its
purity, but did not affect the final pH of NaLS. The chosen optimum condition was
on pH of 6.00 and ratio of lignin-NaHSO3 of 1.0:0.6. Characterization of
functional group using FTIR, and purity of NaLS using UV-Visible Absorption
Spectrophotometer.
Penulis: Gustini Syahbirin,
Ani Suryani, Tesar Dzikrulloh
Kode Jurnal: jpkimiadd080160
