Preparation of black liquor sludge based activated carbon and its application for tripolyphosphate ion adsorption

N. Wahidah, A. A. Sari, A. Saefumillah

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A low-cost activated carbon derived from lignin-based black liquor was prepared and has been applied as an adsorbent for tripolyphosphate ion. Lignin-based black liquor was coagulated using polyaluminum chloride (PAC), producing black liquor sludge that was used as the precursor for preparing the activated carbon. Black liquor sludge-based activated carbon (BLS-AC) was treated by calcination at 725 °C with inert N2 gas flow and then continued by chemical treatment using 0.5 N hydrochloric acid in order to remove the impurities and to increase its surface area. BLS-AC was characterized physically and its ability to adsorb tripolyphosphate ion was evaluated using batch system with varied contact time. The characterization using FTIR reveals that BLS-AC has some functional groups that were typical with commercial activated carbon, such as C-H, C=C and C-O. The BET method analysis indicates that the BLS-AC is a mesoporous material with pore size of 19.74 nm and surface area of 302.498 m2/g. Based on the EDX analysis, it is known that BLS- AC dominantly contains 34.22 % carbon, 18.35 % aluminium, and 45.67 % oxygen. The XRD analysis exhibits that BLS- AC has amorphous phase. The experimental results demonstrate that BLS-AC was quite effective to adsorb tripolyphosphate ion with adsorption efficiency of 90.79 % and adsorption capacity of 0.39 mg/g within 60 minutes. This study emphasizes the byproduct resulted from black liquor sludge which can be utilized to reduce phosphate concentration in wastewater.

Original languageEnglish
Title of host publicationProceedings of the 5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
EditorsTerry Mart, Djoko Triyono, Tribidasari Anggraningrum Ivandini
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420014
DOIs
Publication statusPublished - 1 Jun 2020
Event5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019 - Depok, Indonesia
Duration: 9 Jul 201910 Jul 2019

Publication series

NameAIP Conference Proceedings
Volume2242
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
CountryIndonesia
CityDepok
Period9/07/1910/07/19

Keywords

  • activated carbon
  • adsorbent
  • Black liquor
  • low-cost
  • tripolyphosphate

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