海藻酸钠基吸附材料去除水中重金属离子的研究进展

重金属污染是当今工业发展所面临的一个重要环境问题之一,由于吸附法具有原材料来源广泛、价格低廉、可循环利用等特征,被认为是一种绿色环保的重金属离子去除方法.海藻酸钠是一种天然多糖,其表面存在大量对重金属离子吸附能力优良的羟基和羧基,目前已被广大科研人员用于实验室吸附材料的制备及研究.通过表面嫁接、交联等改性手段制备的海藻...

Adsorption of heavy metal ion by sodium alginate based adsorbent-a review

Heavy metal pollution is one of the most important environmental issues in current industrial development. Due to its simplicity and low-cost, adsorption is regarded as one of the green and environmental friendly methods to remove heavy metals from aqueous solutions. Sodium alginate is a natural polysaccharide which contains significant amount of hydroxyl and carboxyl functional groups that has high affinity towards heavy metal ions. Currently, sodium alginate and its derivatives have been widely used to remove heavy metal ions from aqueous solutions in laboratories. Synthesized by surface grafting, crosslinking, and modification, sodium alginate based adsorbents have high adsorption capacities and great metal removal efficiency, which suggests potential industrial applications. However, due to the weak stability and thermos resistance, sodium alginate based adsorbents were limited in industrial applications. In this work, the development of sodium alginate based adsorbents, introduced the structure and chemical properties of sodium alginate, the adsorption performance and affecting parameters of sodium alginate based adsorbents were summarized. Finally, the adsorption mechanism was analyzed. In future studies, material science and environmental engineering could be combined in the adsorbent synthetic process to enhance the structure and adsorption behavior, which could provide potential applications to remove heavy metals from industrial effluents.