Wang Chongqing, Wang Hui
School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China.
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
Chemosphere. 2018 Feb;192:1-4. doi: 10.1016/j.chemosphere.2017.10.125. Epub 2017 Oct 24.
Novel sorbent (HBC) is prepared by introducing nano-particles (Maghemite and EDTA functionalized layered double hydroxides) on biochar surface. FTIR, XRD, SEM and EDS are used to characterize the biochar nanocomposites. Pb(II) sorption is highly dependent on solution pH. Sorption kinetics and isotherms indicate that Pb(II) sorption onto the sorbents follows pseudo-second order model and Langmuir isotherm. The maximum sorption capacity of Pb(II) onto HBC is up to146.84 mg g, higher than previously reported sorbents. The magnetic particles enable easy separation of HBC from aqueous solution by external magnetic fields. HBC can be used as effective sorbent for removal of heavy metals from wastewater.
通过在生物炭表面引入纳米颗粒（磁赤铁矿和乙二胺四乙酸功能化层状双氢氧化物）制备了新型吸附剂（HBC）。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和能谱仪（EDS）对生物炭纳米复合材料进行表征。Pb（II）的吸附高度依赖于溶液pH值。吸附动力学和等温线表明，Pb（II）在吸附剂上的吸附遵循准二级模型和朗缪尔等温线。HBC对Pb（II）的最大吸附容量高达146.84 mg/g，高于先前报道的吸附剂。磁性颗粒使HBC能够通过外部磁场从水溶液中轻松分离。HBC可作为从废水中去除重金属的有效吸附剂。
