利用动物粪便衍生的水热炭和热解炭从水溶液中去除三价锑和二价镉。
Removal of antimony (III) and cadmium (II) from aqueous solution using animal manure-derived hydrochars and pyrochars.
机构信息
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
出版信息
Bioresour Technol. 2017 Jun;234:77-85. doi: 10.1016/j.biortech.2017.02.130. Epub 2017 Mar 1.
In this study, hydrochars and pyrochars prepared from animal manures were characterized and were used to remove Sb (III) and Cd (II) from aqueous solution. Fourier transform infrared spectroscopy (FTIR) analysis revealed the interaction between Cd (II) and CO and CO groups within biochars and between Sb (III) and CO, CO and OH groups, respectively. Additionally, the lower absolute value of zeta potential of biochar after loading Sb (III) and Cd (II) suggested the occurrence of surface complexation. Existing primarily in the form of Sb (OH), the maximum adsorption capacities (Q) for Sb (III) were lower than those for Cd (II). Due to the lower contents of surface polar functional groups and less negative surface charge, hydrochars exhibited lower Q for Sb (III) and Cd (II) than pyrochars. However, hydrochars in this study had higher sorption capacities for Cd (II) than most of plant-based pyrochars reported by other literature.
在这项研究中，我们对动物粪便制备的水热炭和热解炭进行了表征，并将其用于从水溶液中去除 Sb（III）和 Cd（II）。傅里叶变换红外光谱（FTIR）分析表明，Cd（II）与生物炭中的 CO 和 CO 基团以及 Sb（III）与 CO、CO 和 OH 基团之间存在相互作用。此外，负载 Sb（III）和 Cd（II）后生物炭的zeta 电位绝对值较低表明发生了表面络合。Sb（III）主要以 Sb（OH）的形式存在，其最大吸附容量（Q）低于 Cd（II）。由于表面极性官能团含量较低，表面负电荷较少，水热炭对 Sb（III）和 Cd（II）的 Q 值低于热解炭。然而，与其他文献报道的大多数基于植物的热解炭相比，本研究中的水热炭对 Cd（II）的吸附容量更高。
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