Abstract：
From the environmental perspective, it is essential to develop cheap, eco-friendly, and highly efficient materials for water and wastewater treatment. In this regard, hydrogels and hydrogel-based composites have been widely employed to mitigate global water pollution as this methodology is simple and free from harmful by-products. Notably, alginate and cellulose, which are natural carbohydrate polymers, have gained great attention for their availability, price competitiveness, excellent biodegradability, biocompatibility, hydrophilicity, and superior physicochemical performance in water treatment. This review outlined the recent progress in developing and applying alginate- and cellulose-based hydrogels to remove various pollutants such as dyes, heavy metals, oils, pharmaceutical contaminants, and pesticides from wastewater streams. This review also highlighted the effects of various physical or chemical methods, such as crosslinking, grafting, the addition of fillers, nanoparticle incorporation, and polymer blending, on the physiochemical and adsorption properties of hydrogels. In addition, this review covered the alginate- and cellulose-based hydrogels\' current limitations such as low mechanical performance and poor stability, while presenting strategies to improve the drawbacks of the hydrogels. Lastly, we discussed the prospects and future directions of alginate- and cellulose-based hydrogels. We hope this review provides valuable insights into the efficient preparations and applications of hydrogels.
摘要：
从环境的角度来看,发展廉价是必不可少的，环保,以及用于水和废水处理的高效材料。在这方面,水凝胶和基于水凝胶的复合材料已被广泛用于减轻全球水污染，因为这种方法简单且不含有害副产物。值得注意的是,海藻酸盐和纤维素，它们是天然的碳水化合物聚合物，它们的可用性获得了极大的关注，价格竞争力，优异的生物降解性，生物相容性，亲水性,在水处理中具有优越的物理化学性能。这篇综述概述了开发和应用基于藻酸盐和纤维素的水凝胶去除染料等各种污染物的最新进展，重金属,油，药物污染物,和废水中的农药。这篇综述还强调了各种物理或化学方法的影响，如交联，嫁接,添加填料，纳米粒子掺入，和聚合物共混，水凝胶的物理化学和吸附性能。此外,这篇综述涵盖了基于藻酸盐和纤维素的水凝胶的当前局限性，例如机械性能低和稳定性差，同时提出了改善水凝胶缺点的策略。最后,我们讨论了基于藻酸盐和纤维素的水凝胶的前景和未来的方向。我们希望这篇综述对水凝胶的有效制备和应用提供有价值的见解。
