Institute of Environmental Engineering, Central South University, Changsha 410083, PR China.
Water Sci Technol. 2010;62(9):2157-66. doi: 10.2166/wst.2010.385.
Spent grain, the low-cost and abundant biomass produced in the brewing industry, was functionalized with thiol groups to be used as an adsorbent for Hg(II) removal from acidic aqueous solution. The adsorbents were characterized by the energy-dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectroscopy. Optimum pH for Hg(II) adsorption onto the thiol-functionalized spent grain (TFSG) was 2.0. The equilibrium and kinetics of the adsorption of Hg(II) onto TFSG from acidic aqueous solution were investigated. From the Langmuir isotherm model the maximum adsorption capacity of TFSG for Hg(II) was found to be 221.73 mg g(-1), which was higher than that of most various adsorbents reported in literature. Moreover, the adsorption of Hg(II) onto TFSG followed pseudo-second-order kinetic model.
废谷粒是酿造工业中低成本且丰富的生物质，经过巯基功能化后可用作从酸性水溶液中去除 Hg(II) 的吸附剂。通过能谱分析（EDAX）和傅里叶变换红外（FTIR）光谱对吸附剂进行了表征。Hg(II) 吸附到巯基化废谷粒（TFSG）上的最佳 pH 值为 2.0。研究了从酸性水溶液中 TFSG 对 Hg(II) 的吸附平衡和动力学。从 Langmuir 等温模型得出，TFSG 对 Hg(II) 的最大吸附容量为 221.73mg g(-1)，高于文献中报道的大多数各种吸附剂。此外，Hg(II) 吸附到 TFSG 上遵循拟二级动力学模型。
