School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Xinxiang 453007, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China.
School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Xinxiang 453007, China.
Bioresour Technol. 2021 Jan;320(Pt A):124264. doi: 10.1016/j.biortech.2020.124264. Epub 2020 Oct 26.
A Fe/Mn oxides loaded biochar (FeMn-BC) was prepared to enhance the adsorption of tetracycline (TC). γ-FeO and MnO were assigned to the Fe and Mn oxides, respectively. The enhanced adsorption of TC was dominated by the loaded γ-FeO and MnO. According to Akaike-Information-Criteria evaluation, Elovich kinetic and Langmuir isotherm models could best describe the adsorption with a maximum capacity of 14.24 mg/g. During adsorption process, the γ-FeO and MnO hydrolyzed into hydroxides (FeOOH and MnOOH) which acted as bases to complex with TC ion under alkaline condition (pH = 11). After the adsorption, the concentrations of leached Fe and Mn could meet the requirements PRC standards GB13456-2012 and GB8978-1996, respectively. The FeMn-BC had ~24% on TC removal (initial concentration of 20 mg/L) after four-cycles regeneration. The FeMn-BC was also available for TC adsorptions in column tests and actual wastewater.
一种负载 Fe/Mn 氧化物的生物炭（FeMn-BC）被制备用于增强四环素（TC）的吸附。γ-FeO 和 MnO 分别被指定为 Fe 和 Mn 氧化物。TC 的增强吸附主要由负载的 γ-FeO 和 MnO 主导。根据 Akaike 信息准则评估，Elovich 动力学和 Langmuir 等温线模型可以最好地描述吸附，最大容量为 14.24mg/g。在吸附过程中，γ-FeO 和 MnO 水解成氢氧化物（FeOOH 和 MnOOH），在碱性条件（pH=11）下作为碱与 TC 离子络合。吸附后，浸出的 Fe 和 Mn 的浓度分别可以满足中国国家标准 GB13456-2012 和 GB8978-1996 的要求。在经过四轮再生后，FeMn-BC 对 TC 的去除率约为 24%（初始浓度为 20mg/L）。FeMn-BC 也可用于柱试验和实际废水中的 TC 吸附。
