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| Effect of humic acid and pH on the adsorption of arsenic(Ⅲ) on biochar-ferro manganese oxide composite material |
| Received:September 13, 2016 |
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| KeyWord:humic acid;biochar-ferro manganese oxide;arsenic(Ⅲ) |
| Author Name | Affiliation | E-mail | | LIN Li-na | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
School of Land and Environmental Sciences, Shenyang Agriculture University, Shenyang 110000, China | | | HUANG Qing | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
School of Land and Environmental Sciences, Shenyang Agriculture University, Shenyang 110000, China | | | LIAN Fei | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIU Zhong-qi | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | SONG Zheng-guo | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | forestman1218@163.com |
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| Abstract: |
| The sorption batch experiments were conducted to investigate the effect of humic acid(HA) on the adsorption of arsenic(Ⅲ) on biochar-ferro manganese oxide composite material(F1M4BC25). The results showed that the adsorption capacity of F1M4BC25 for arsenic(Ⅲ)was affected by the concentration of HA. Compared with no HA, the adsorption capacity of arsenic(Ⅲ) on the F1M4BC25 increased by 5.00% in the presence of 5 mg·L-1 of HA. The adsorption capacity of adsorption decreased by 5.00% and 34.3% when 10 and 50 mg·L-1 of HA was added, respectively. The adding order of arsenic(Ⅲ) and HA also affected the adsorption capacity of arsenic(Ⅲ) on F1M4BC25 that initial addition of arsenic(Ⅲ)(Qm=5.82 mg·g-1) > simultaneous addition(Qm=5.20 mg·g-1) > initial addition of HA(Qm=3.30 mg·g-1). The capacity of arsenic(Ⅲ) on F1M4BC25 under pH=3 was higher than that under pH=6. The concentration of DOC in solution followed the sequence of late addition of HA > simultaneous addition > initial addition under either pH 3 or 6. The research also showed that high concentration of HA could compete with arsenic(Ⅲ) to reduce the arsenic(Ⅲ) on F1M4BC25, but the low concentration of HA and weak acid conditions were favorable for the removal of arsenic(Ⅲ) from solution by F1M4BC25. |
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