Department of Environmental Engineering, National Ilan University, Ilan, Taiwan, 260.
Water Environ Res. 2012 Sep;84(9):733-43. doi: 10.2175/106143012x13373550427156.
Wine processing waste sludge (WPWS) has been shown to be an effective sorbent for sorption of nickel, lead, and chromium, but the sorption of copper (Cu) in aqueous solution by WPWS has not been conducted. The objective of this study was to explore the sorption mechanism of WPWS for copper. Infrared analysis revealed carboxyl was the major functional group in WPWS. The WPWS sorption isotherms of copper were only well described by Langmuir sorption isotherm. The maximum adsorption capacity (Qm) was 14.26 mg/g at 50 degrees C. A pseudo-second-order sorption kinetic model successfully described the kinetics of copper sorption onto WPWS. The Gibb free energies (deltaG0) ranged from -20.69 to -24.29 kJ mol(-1), and the deltaH0 and deltaS0 were 5.048 kJ mol(-1) and 91.05 J mol(-1) K(-1), respectively. The trend of the intra-particular diffusion rate is the opposite of the adsorption constant of the pseudo-second-order equation.
葡萄酒加工废物污泥 (WPWS) 已被证明是一种有效的吸附剂，可用于吸附镍、铅和铬，但 WPWS 对水溶液中铜 (Cu) 的吸附尚未进行。本研究的目的是探讨 WPWS 对铜的吸附机理。红外分析表明，羧基是 WPWS 中的主要官能团。WPWS 对铜的吸附等温线仅能很好地用朗缪尔吸附等温线描述。在 50°C 时，最大吸附容量 (Qm) 为 14.26mg/g。拟二级吸附动力学模型成功地描述了铜在 WPWS 上的吸附动力学。吉布斯自由能 (ΔG0) 范围为 -20.69 至 -24.29 kJ mol(-1)，ΔH0 和 ΔS0 分别为 5.048 kJ mol(-1)和 91.05 J mol(-1) K(-1)。内扩散速率的趋势与拟二级方程的吸附常数相反。
