Bio-assembled MgO-coated tea waste biochar efficiently decontaminates phosphate from water and kitchen waste fermentation liquid  

作　　者：Chuchu Feng Lan Zhang Xiu Zhang Jingyu Li Yimeng Li Yaru Peng Yuan Luo Ronghua Li Bin Gao Mohamed A.Hamouda Ken Smith Esmat F.Ali Sang Soo Lee Zengqiang Zhang Jörg Rinklebe Sabry M.Shaheen 

机构地区：[1]College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,Shaanxi,China [2]Ningxia Key Laboratory for the Development and Application of Microbial Resources in Extreme Environments,North Minzu University,Yinchuan 750021,Ningxia Hui Autonomous Region,China [3]Department of Agricultural and Biological Engineering,University of Florida,Gainesville,FL 32611,USA [4]Department of Civil and Environmental Engineering,Faculty of Engineering,United Arab Emirates University,Al Ain,Abu Dhabi,United Arab Emirates [5]The Department of Environmental Science,The University of Arizona,Shantz Building Rm 4291177 E 4th St.,Tucson,AZ 85721,USA [6]Department of Biology,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia [7]Department of Environmental and Energy Engineering,Yonsei University,Wonju 26493,Republic of Korea [8]School of Architecture and Civil Engineering,Laboratory of Soil and Groundwater Management,Institute of Foundation Engineering,Water-and Waste-Management,University of Wuppertal,Pauluskirchstraße 7,42285 Wuppertal,Germany [9]Department of Arid Land Agriculture,Faculty of Meteorology,Environment,and Arid Land Agriculture,King Abdulaziz University,Jeddah 21589,Saudi Arabia [10]Department of Soil and Water Sciences,Faculty of Agriculture,University of Kafrelsheikh,Kafr El-Sheikh 33516,Egypt

出　　处：《Biochar》2023年第1期391-408,共18页生物炭（英文）

基　　金：The National Natural Science Foundation of China(32172679).

摘　　要：Crystal morphology of metal oxides in engineered metal-biochar composites governs the removal of phosphorus(P)from aqueous solutions.Up to our best knowledge,preparation of bio-assembled MgO-coated biochar and its application for the removal of P from solutions and kitchen waste fermentation liquids have not yet been studied.Therefore,in this study,a needle-like MgO particle coated tea waste biochar composite(MTC)was prepared through a novel biological assembly and template elimination process.The produced MTC was used as an adsorbent for removing P from a synthetic solution and real kitchen waste fermentation liquid.The maximum P sorption capacities of the MTC,deduced from the Langmuir model,were 58.80 mg g^(−1) from the solution at pH 7 and 192.8 mg g^(−1) from the fermentation liquid at pH 9.The increase of ionic strength(0-0.1 mol L^(−1) NaNO_(3))reduced P removal efficiency from 98.53%to 93.01%in the synthetic solution but had no significant impact on P removal from the fermentation liquid.Precipitation of MgHPO4 and Mg(H_(2)PO_(4))_(2)(76.5%),ligand exchange(18.0%),and electrostatic attraction(5.5%)were the potential mechanisms for P sorption from the synthetic solution,while struvite formation(57.6%)and ligand exchange(42.2%)governed the sorption of P from the kitchen waste fermentation liquid.Compared to previously reported MgO-biochar composites,MTC had a lower P sorption capacity in phosphate solution but a higher P sorption capacity in fermentation liquid.Therefore,the studied MTC could be used as an effective candidate for the removal of P from aqueous environments,and especially from the fermentation liquids.In the future,it will be necessary to systematically compare the performance of metal-biochar composites with different metal oxide crystal morphology for P removal from different types of wastewater.

关 键 词：MgO carbon composite Biowaste-derived biochar Phosphorus sorption Fermentation liquid DEPHOSPHORIZATION 

分 类 号：X799.3[环境科学与工程—环境工程] X703