Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, UniversitiTeknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
Int J Biol Macromol. 2021 Mar 31;174:216-228. doi: 10.1016/j.ijbiomac.2021.01.150. Epub 2021 Jan 28.
The presence of heavy metal and radionuclides in water bodies has been a long-lasting environmental problem which results in many undesirable consequences. In this framework, the biosorption process, which uses inexpensive and naturally produced material such as alginate, is an alternative technology in the environmental remediation. This review provides relevant and recent literature regarding the application of alginate and its derivatives on removal of various heavy metal ions and radionuclides. The effects of process variables such as solution pH, adsorbent dosage, metal ion concentration, contact time, temperature and co-existing ions used in batch studies in addition to kinetic, isothermal models as well as thermodynamic that fit the adsorption experimental data are critically discussed. This review also includes mechanisms involved during adsorption process. Furthermore, future research needs for the removal of contaminants by alginate-based materials with the aims of improving their adsorption performance and their practical applications are commented.
水体中重金属和放射性核素的存在是一个长期存在的环境问题，会导致许多不良后果。在这种情况下，生物吸附过程是一种替代技术，它使用廉价且天然产生的物质，如海藻酸盐。本综述提供了关于海藻酸盐及其衍生物在去除各种重金属离子和放射性核素方面的相关和最新文献。本文还讨论了在吸附实验中，影响吸附过程的因素，如溶液 pH 值、吸附剂用量、金属离子浓度、接触时间、温度和共存离子，以及适合吸附实验数据的动力学、等温模型和热力学。此外，还包括吸附过程中涉及的机制。最后，还对未来利用基于海藻酸盐的材料去除污染物的研究需求进行了评论，目的是提高其吸附性能和实际应用。
