Journal
BIORESOURCE TECHNOLOGY
Volume 274, Issue -, Pages 525-532Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.12.022
Keywords
Adsorption; Methylene blue; BD-derived carbon materials; Alginate-polyvinyl alcohol hydrogel
Funding
- National Natural Science Foundation of China [51679083]
- Key Research and Development Project of Hunan Province [2018WK2011]
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This study explored the cooperative effects of hydrothermal or activators pretreatment and pyrolysis process on the chemical composition of bean dreg (BD)-derived carbon materials and its adsorption characteristics for methylene blue (MB) further. The results showed that hydrothermal assisted pyrolysis carbon with or without activator (HBK and HB) possess higher BET surface area than no hydrothermal assisted carbon (BKs and B, respectively). But surface area alone was not a critical factor contributing to MB adsorption, it also depends on strong electrostatic interaction and the hydrogen bonding interaction between N+ in MB combines with -OH and -COO- group of adsorbent surface by pH-dependent adsorption and pseudo-second-order model. Additionally, BK800 (pyrolysis at 800 degrees C) was identified as the most efficient adsorbent due to maximum adsorption capacity (434.78 mg g(-1)), and BDP (BD-derived polymer composite hydrogel), possessing excellent adsorption property and high reusability, made BK800 easier to separate from the regenerated dye solution.
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