The use of nontoxic, biodegradable and biocompatible biopolymers such as chitosan and cellulose is of considerable importance particularly in uptake of metal ions from the contaminated water systems. Current study was aimed to develop a chitosan-based biosorbent in combination with cellulose to form composite adsorbent beads. The developed composite beads were chemo-physically characterized using advanced analytical techniques of scanning electron microscope, Fourier transform infrared, x-ray diffraction and thermogravimetric analysis. The point of zero charge (PZC) of the developed beads was determined using the methods of salt addition, electrokinetic potential and the mass atitration. The average value of PZC of composite beads was found to be 7.26 using the said methods. On incorporating cellulose into chitosan, the thermal properties of the composite beads were considerably enhanced. The adsorption capacity of chitosan–cellulose beads was found to be 99.8, 79.98 and 99.10 mg/g for Ni(II), Cu(II) and Cr(III), respectively. The adsorption extent showed that the developed composite beads could be employed as adsorbent for wastewater treatment.

中文翻译：

---

纤维素介导的壳聚糖吸附珠的制备及其表面化学表征

使用无毒、可生物降解和生物相容性的生物聚合物如壳聚糖和纤维素具有相当重要的意义，特别是在从受污染的水系统中吸收金属离子方面。目前的研究旨在开发一种基于壳聚糖的生物吸附剂与纤维素结合形成复合吸附珠。使用先进的扫描电子显微镜、傅里叶变换红外、X 射线衍射和热重分析技术对开发的复合珠进行化学物理表征。使用加盐、电动势和质量滴定的方法确定了所开发珠的零电荷点(PZC)。使用上述方法发现复合珠的 PZC 平均值为 7.26。在将纤维素掺入壳聚糖中时，复合珠的热性能显着提高。壳聚糖-纤维素珠对 Ni(II)、Cu(II) 和 Cr(III) 的吸附容量分别为 99.8、79.98 和 99.10 mg/g。吸附程度表明所开发的复合珠可用作废水处理的吸附剂。