Lignosulfonates are a by-product of the agricultural and forestry waste and paper industries. Strengthening the sustainable use of lignosulfonates is a problem to be solved. In this study, hydrophilic agricultural and forestry waste calcium lignosulfonate (CaLS) was combined with single/double-layered MXene, and added to the natural polysaccharide sodium alginate (SA) to prepare a pervaporation me, membrane with a three-component hybrid structure. Characterization experiments such as scanning electron microscopy and contact angle demonstrated that CaLS increased the hydrophilicity and reduced swelling of the membrane, and MXene formed a layered cross-sectional morphology that further reduced swelling. A 90% ethanol aqueous solution was used to evaluate the dehydration performance of the membrane. The results showed that the permeation flux and separation factor of the membrane increased by 74% and 160%, respectively. Compared to the pure SA membrane after CaLS was incorporated. MXene further improved the pervaporation performance of the MXene@CaLS/SA membrane, with the permeation flux of about 938 g·m⁻²·h⁻¹, and the separation factor of 4612 (two and four times higher than the pure SA membrane, respectively). This study provides a theoretical and technical basis for the development of new separation materials, and will help expand the high-value utilization of lignosulfonates.

木质素磺酸盐是农林废弃物和造纸工业的副产品。加强木质素磺酸盐的可持续利用是一个亟待解决的问题。本研究将亲水性农林废弃物木质素磺酸钙（CaLS）与单/双层MXene结合，添加到天然多糖海藻酸钠（SA）中，制备了具有三组分混合结构的渗透蒸发膜。扫描电子显微镜和接触角等表征实验表明，CaLS 增加了膜的亲水性并减少了膜的溶胀，而 MXene 形成了层状横截面形态，进一步减少了溶胀。使用90%乙醇水溶液评价膜的脱水性能。结果表明，膜的渗透通量和分离系数分别提高了74%和160%。与加入 CaLS 后的纯 SA 膜相比。MXene进一步提高了MXene@CaLS/SA膜的渗透蒸发性能，渗透通量约为938 g·m^-2 ·h ^-1，分离因子为4612（分别是纯SA膜的2倍和4倍）。该研究为开发新型分离材料提供了理论和技术基础，有助于扩大木质素磺酸盐的高价值利用。