Adsorptive Removal of Manganese from Manganese Slag Aqueous Solutions Using Biochars Loaded with Organic Acid-Fe

DOI

10.2991/icmea-16.2016.31How to use a DOI?

Keywords

Biochar Modification, Organic Acid-Fe, Manganese, Adsorptive Removal, Slag.

Abstract

Manganese adsorptive removal is an important treatment process in constructed wetlands to deal with considerable amounts of tailing wastewater, many materials have been proposed for its removal. This work is aimed to examining the potential of biochars sorbent materials for removing Mn ions from manganese slag aqueous solutions by modified biochars. The biochars with different organic acid-Fe ratios were prepared; factors on Mn adsorption including mixing ratio, Fe adsorption rate, and the BET surface of the modified biochars were discussed and the sorption efficiency of Mn was investigated through column adsorption experiments. According to our study, it's clearly that loaded organic acid biochar with greater Fe content removed higher percent of Mn from the aqueous solution. Contents of Fe2O3(30-103%), Fe3O4 (65-106%)and CaCO3 (4-80%)increased after loaded with organic acid-Fe in the biochars. With the increasing Fe content (2.58-5.07%) in biochar, the BET surface area of the Citric Acid-Fe biochar composites decreased from 81 m2/g to 35 m2/g, while the EDTA-Fe biochar composites decreased from 96 m2/g to 22 m2/g. The fixed loaded Fe biochars mixtures had a reduction of 4.02% to 32.01% in Mn sorption contrasting with raw biochar. The modified biochars could be used to remove the Mn ions in the tailing wastewater.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zu-Yong CHEN
AU  - Fang LIU
AU  - Yuan-Sheng LIU
AU  - Tong-Da BU
AU  - Jian ZHU
PY  - 2016/12
DA  - 2016/12
TI  - Adsorptive Removal of Manganese from Manganese Slag Aqueous Solutions Using Biochars Loaded with Organic Acid-Fe
BT  - Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)
PB  - Atlantis Press
SP  - 193
EP  - 198
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-16.2016.31
DO  - 10.2991/icmea-16.2016.31
ID  - CHEN2016/12
ER  -