文献类型： 会议论文
第一作者： Euis Hermiati
作者： Euis Hermiati 1 ; Lucky Risanto 1 ; M. Adly Rahandi Lubis 1 ; Raden Permana Budi Laksana 1 ; Aniva Rizkia Dewi 2 ;
作者机构： 1.Research Center for Biomaterials, Indonesian Institute of Sciences, Jl. Raya Bogor Km 46, Cibinong, Bogor 16911, Indonesia
2.Diploma Program for Chemical Analysis, Bogor Agricultural University, Bogor 16151, Indonesia
关键词： Chemical Characterization;Lignin;Kraft Pulping Black Liquor
会议名称： International Symposium on Applied Chemistry
主办单位：
页码： 020005-1-020005-7
摘要： In order to know the proper use of lignin derived from pulping process of A. mangium, it is important to study the characteristics of lignin obtained from this species. The objective of this research was to study the characteristics of lignin isolated from kraft pulping black liquor of A. mangium. Lignin was isolated from the black liquor by single step and two step acid precipitation. The lignins were characterized for their moisture, ash, acid soluble lignin (ASL), and acid insoluble lignin (AIL) contents. Elemental composition, FTIR spectra, UV spectra, and microscopic structure using SEM were also analyzed. The yield of lignin obtained through one step precipitation of black liquor (45.76%) was much higher than that through two step precipitation (7.38%), while ash contents of lignin from one step and two step precipitations were almost the same. Ultimate analysis shows that carbon content in lignin from one step precipitation was lower than that from two step precipitation, while hydrogen, oxygen, nitrogen and sulfur content were relatively the same. Two step precipitation could increase the AIL and decrease the ASL content of the lignin isolate. Results of UV analysis show that in neutral medium (dioxane-water) the two lignin isolates had strong absorbance at 240 nm, while in alkaline medium (NaOH pH 12) there were strong absorption at 210 nm, and weak absorption at 280 nm. The FT-IR spectra reveal that the two lignin isolates had similar functional groups. This means that the removal of sugar from lignin did not change the lignin structure. The SEM analysis shows that both lignin isolates still contain some dirts.
分类号： o69-532
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