In many industrial fields, treatment of composite contaminations involving inorganic heavy metal ions and organic pollutants simultaneously remains a tremendous challenge. In this paper, an innovative strategy based on the gelation process of Sodium Alginate (SA) was proposed for synchronous treatment of composite pollutants. Through a pre-gelation step, SA gel balls encapsulated with S²⁻ (SA/S²⁻ gel) were formed and immersed into polluted solutions containing Pb²⁺/Cd²⁺ and Cd²⁺/dye. The removal efficiency of Pb²⁺/Cd²⁺ by SA/S²⁻ gel were both increased compared with pure SA gel. The adsorbed Pb²⁺/Cd²⁺ was in-situ transformed into PbS/CdS quantum dots (QDs) possessing photo-catalytic activity, which induced the degradation of dyes under UV irradiation. In this respect, the proposed SA/S²⁻ system might provide a high-performance and energy-saving way for comprehensive treatment of inorganic heavy metal and organic industrial pollutants.

在许多工业领域，同时处理涉及无机重金属离子和有机污染物的复合污染物仍然是一个巨大的挑战。本文提出了一种基于海藻酸钠（SA）凝胶化工艺的复合污染物同步处理的创新策略。通过预胶凝步骤，形成用S ²⁻封装的SA凝胶球（SA/S ²⁻凝胶）并将其浸入含有Pb ²⁺ /Cd ²⁺和Cd ²⁺ /染料的污染溶液中。与纯SA凝胶相比，SA/S ²⁻凝胶对Pb ²⁺ /Cd ²⁺的去除效率均有所提高。吸附的Pb ²⁺ /Cd ²⁺原位转化为具有光催化活性的PbS/CdS量子点(QD)，在紫外照射下诱导染料降解。在这方面，所提出的SA/S ²⁻系统可能为无机重金属和有机工业污染物的综合处理提供高性能和节能的途径。