Iqbal M, Saeed A
Environment Biotechnology Group, Biotechnology and Food Research Center, PCSIR Laboratories Complex, Lahore 54600, Pakistan.
Environ Technol. 2002 Oct;23(10):1091-8. doi: 10.1080/09593332308618338.
The ability of a reticulated fibrous network of palm petiolar felt-sheath (PPF) to remove toxic metals such as Cd, Cu and Zn from contaminated water was investigated as a new biosorbent system. PPF was found to sequester metal ions efficiently from dilute aqueous solutions with a selectivity order of Cd > Cu > Zn. The extent of adsorption was found to be dependent on pH, metal ion concentration and amount of biosorbent. The metal uptake was completed in a short time and contact of 30 min was observed to be optimum. The adsorption of all the three metals followed Langmuir isotherm. The bound metal ions were successfully desorbed and the PPF fibrous-biomass remained effective during five adsorption-desorption cycles. Present studies suggest that PPF has potential to be used in the removal/recovery of heavy metal ions from aqueous solutions.
作为一种新型生物吸附系统，研究了棕榈叶柄毡鞘（PPF）的网状纤维网络从受污染水中去除镉、铜和锌等有毒金属的能力。发现PPF能从稀水溶液中有效螯合金属离子，选择性顺序为镉>铜>锌。发现吸附程度取决于pH值、金属离子浓度和生物吸附剂的量。金属吸收在短时间内完成，观察到30分钟的接触时间为最佳。所有三种金属的吸附均符合朗缪尔等温线。结合的金属离子成功解吸，并且PPF纤维生物质在五个吸附-解吸循环中仍保持有效。目前的研究表明，PPF有潜力用于从水溶液中去除/回收重金属离子。
