| 摘要 |
filter materials. SUBSTANCE: ion- exchange material intended for cleaning of air and recovery of multivalent metals from waste waters includes layer containing polyacrylic acid, layer of polymethacrylic acid hydrazide, and fibrous support composed of glass, asbestos, and basalt fibers at weight ratio polyacrylic acid/support/polymethacrylic acid hydrazide 1: (0.8-1.2):1. EFFECT: increased sorption capacity, longevity, and acid resistance. 1 tbl, 3 ex
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