电镀铬母液经净化再生去除杂质后，可直接回用于生产，有效提高料液利用率；不可再生失效液通过浓缩工艺，回收其中高价值主盐物料，经纯化处理后复用，实现失效废液减量化，切实缓解企业环保处置压力。以下为母液回收主盐物料的核心成分及工业常规含量。

      回收的高价值主盐物料以工业主流六价铬体系为主，具体成分及含量如下：主盐铬酸酐（CrO₃）120~320g/L，作为核心回收组分，直接决定镀层质量与沉积效率；辅助成分硫酸（H₂SO₄）1.2~3.2g/L，需与铬酸酐保持合理比例，保障镀层均匀光滑；杂质（Fe³⁺、Cu²⁺）≤0.8g/L，回收及纯化过程中需**去除，避免影响复用效果，各成分含量可根据失效母液实际情况微调。

Introduction to Purification, Regeneration of Chromium Electroplating Bath Mother Liquor and Material Recovery of Spent Liquid: After removing impurities through purification and regeneration, the chromium electroplating mother liquor can be directly reused in production to effectively improve the utilization rate of feed liquid. For non-renewable spent liquid, high-value main salt materials are recovered through concentration process, and reused after purification, realizing the reduction of spent liquid and effectively alleviating the environmental disposal pressure of enterprises. The core components and conventional industrial contents of the main salt materials recovered from the mother liquor are as follows.

The recovered high-value main salt materials are mainly industrial mainstream hexavalent chromium system, with specific components and contents as follows: main salt chromic anhydride (CrO₃) 120~320g/L, as the core recovery component, directly determining the coating quality and deposition efficiency; auxiliary component sulfuric acid (H₂SO₄) 1.2~3.2g/L, which needs to maintain a reasonable ratio with chromic anhydride to ensure uniform and smooth coating; impurities (Fe³⁺, Cu²⁺) ≤0.8g/L, which must be completely removed during recovery and purification to avoid affecting the reuse effect, and the content of each component can be fine-tuned according to the actual situation of the spent mother liquor.