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Sludge-derived biochar with multivalent iron as an efficient Fenton catalyst for degradation of 4-Chlorophenol.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.scitotenv.2020.138299 Quan Gan 1 , Huijie Hou 2 , Sha Liang 2 , Jingjing Qiu 3 , Shuangyi Tao 3 , Liang Yang 3 , Wenbo Yu 3 , Keke Xiao 2 , Bingchuan Liu 2 , Jingping Hu 2 , Yanfei Wang 4 , Jiakuan Yang 5
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.scitotenv.2020.138299 Quan Gan 1 , Huijie Hou 2 , Sha Liang 2 , Jingjing Qiu 3 , Shuangyi Tao 3 , Liang Yang 3 , Wenbo Yu 3 , Keke Xiao 2 , Bingchuan Liu 2 , Jingping Hu 2 , Yanfei Wang 4 , Jiakuan Yang 5
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Fe-rich biochar with multivalent iron compounds (Fe0, Fe0.95C0.05, Fe3O4, and FeAl2O4) pyrolyzed from sludge cake conditioned with Fenton's reagent and red mud was utilized as an efficient Fenton catalyst for the degradation of 4-chlorophenol (4-CP). Effects of pyrolysis temperature and sludge conditioner composition on the transformation of iron compounds were studied. Both homogeneous Fenton reaction initiated by Fe2+ leached from both low-valent Fe0 and Fe0.95C0.05, and heterogeneous Fenton reaction initiated by solid iron phases of Fe3O4 and FeAl2O4 were revealed to contribute to the degradation of 4-CP. The removal efficiency of 4-CP remained 100% after five successive degradation rounds. The homogeneous Fenton reaction mainly works in the first degradation round, and the heterogeneous Fenton reaction dominates in subsequent degradation rounds. The findings of this study suggest that sewage sludge derived Fe-rich biochar could be utilized as an efficient Fenton catalyst for recalcitrant organics degradation.
中文翻译：
污泥衍生的生物炭，含多价铁作为有效的Fenton催化剂，可降解4-氯酚。
由Fenton试剂和赤泥处理过的污泥饼热解后的富含多价铁化合物（Fe0，Fe0.95C0.05，Fe3O4和FeAl2O4）的富铁生物炭被用作降解4-氯苯酚（4- CP）。研究了热解温度和污泥调节剂组成对铁化合物转化的影响。由Fe2 +引发的均相Fenton反应从低价Fe0和Fe0.95C0.05浸出，以及由Fe3O4和FeAl2O4的固体铁相引发的非均相Fenton反应均有助于4-CP的降解。经过五轮连续降解后，4-CP的去除效率保持100％。均相Fenton反应主要在第一轮降解中起作用，异质的Fenton反应在随后的降解回合中占主导地位。这项研究的结果表明，污水污泥衍生的富铁生物炭可以用作有效的芬顿催化剂，用于难降解的有机物降解。
更新日期：2020-04-03
中文翻译：
污泥衍生的生物炭，含多价铁作为有效的Fenton催化剂，可降解4-氯酚。
由Fenton试剂和赤泥处理过的污泥饼热解后的富含多价铁化合物（Fe0，Fe0.95C0.05，Fe3O4和FeAl2O4）的富铁生物炭被用作降解4-氯苯酚（4- CP）。研究了热解温度和污泥调节剂组成对铁化合物转化的影响。由Fe2 +引发的均相Fenton反应从低价Fe0和Fe0.95C0.05浸出，以及由Fe3O4和FeAl2O4的固体铁相引发的非均相Fenton反应均有助于4-CP的降解。经过五轮连续降解后，4-CP的去除效率保持100％。均相Fenton反应主要在第一轮降解中起作用，异质的Fenton反应在随后的降解回合中占主导地位。这项研究的结果表明，污水污泥衍生的富铁生物炭可以用作有效的芬顿催化剂，用于难降解的有机物降解。
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