Statistical analysis of congo red dye removal using sawdust activated carbon

M. Srinivas Kini, K. Balakrishna Prabhu, Ankit Gundecha, U. Devika

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In the present study, an adsorbent was prepared from Ben Teak sawdust by chemically treating and carbonizing with phosphoric acid. Using Design Experts software, 2 level factorial studies and Response surface methodology studies using Box-Benkhen design model were carried out and a relationship between Qe and pH, temperature, concentration of dye, amount of adsorbent, agitation speed were derived for Congo red- Saw Dust Carbon(SDC). Maximum Congo-red removal of 96.764 % and adsorption capacity of 149.507 mg/g was found at pH 2, 30 °C, 125 rpm, 150 mg/L and 1gram/L of reaction mixture for an optimum contact time of 2.5 hours. Adsorption isotherm obtained fitted well into both Freundlich and Langmuir equation but Freundlich isotherm fits better with 1/n ranging from 0.4944 to 0.5894 and R2 ranging from 0.92333 to 0.952. The qmax from Langmuir isotherm was established to be 209.7 mg/g.

Original languageEnglish
Pages (from-to)8788-8804
Number of pages17
JournalInternational Journal of Applied Engineering Research
Issue number19
Publication statusPublished - 01-01-2017

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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