Roles of iron and manganese in bimetallic biochar composites for efficient persulfate activation and atrazine removal
Yuan Liang, Ran Tao, Ben Zhao, Zeda Meng, Yuanyuan Cheng, Fan Yang, Huihui Lei, Lingzhao Kong
Biochar ›› 2024, Vol. 6 ›› Issue (1) : 41.
Roles of iron and manganese in bimetallic biochar composites for efficient persulfate activation and atrazine removal
• | Both Fe- and Mn-rich bimetallic biochar can effectively activate persulfate, but Fe-rich biochar is superior. |
• | Atrazine degradation in Fe-rich biochar systems was attributed to free radicals through oxidative routes. |
• | Atrazine degradation pathways involved alkyl hydroxylation, alkyl oxidation, dealkylation, and dechlorohydroxylation. |
As for Atrazine (C8H14ClN5) degradation in soil, iron (Fe)-manganese (Mn) bimetallic biochar composites were proved to be more efficient for persulfate (PS) activation than monometallic ones. The atrazine removal rates of Fe/Mn loaded biochar + PS systems were 2.17–2.89 times higher than Fe/Mn loaded biochar alone. Compared with monometallic biochar, the higher atrazine removal rates by bimetallic biochar (77.2–96.7%) were mainly attributed to the synergy degradation and adsorption due to the larger amounts of metal oxides on the biochar surface. Atrazine degradation in Fe-rich biochar systems was mainly attributed to free radicals (i.e.,
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