不同腐植酸类材料对电解锰渣中Mn的稳定作用

针对电解锰渣堆场在降雨条件下释放出大量Mn产生的环境问题，通过对褐煤和腐植酸钠进行改性，优选改性材料再与壳聚糖、酚醛树脂进行复合，探讨不同腐植酸类材料对电解锰渣中Mn的稳定效果。结果表明:在腐植酸类材料添加量为5%~20%时，褐煤对锰渣中Mn的稳定效率为27.5%~31.5%，而腐植酸钠对Mn的稳定效率为7.2%~27.6%；褐煤改性后的不溶性腐植酸对锰渣中Mn的稳定效率最高提升了14.3%，但腐植酸钠改性后的磺化腐植酸钠对Mn的稳定效率仅略有提高。进一步将不溶性腐植酸、磺化腐植酸钠分别与壳聚糖、酚醛树脂进行复合，得出壳聚糖-不溶性腐植酸复合材料对锰渣中Mn的稳定效率最高为55.7%，而酚醛树脂-磺化腐植酸钠复合材料对Mn的稳定效率最高可达73.1%。

EFFECT OF DIFFERENT HUMIC ACID MATERIALS ON STABILIZATION OF Mn IN ELECTROLYTIC MANGANESE SLAG

In view of the environmental problems caused by the release of a large amount of Mn from the electrolytic manganese slag yard under rainy conditions, in this study, the modification of lignite and sodium humate was carried out, and the modified materials were further combined with chitosan and phenolic resin to investigate the effect of different humic acid materials on the stability of Mn in electrolytic manganese slag. The results showed that when the amount of humic acid material added was 5%~20%, the stability efficiency of Mn in manganese slag was 27.5%~31.5% for lignite, while the stability efficiency of humate to Mn was 7.2%~27.6% (for sodium humate). The Mn stabilization efficiency in manganese slag of the insoluble humic acid, from modified lignite, was up to 14.3%, but the sulfonated humic acid, from modified sodium humate, had a slight improvement. Furthermore, insoluble humic acid and sulfonated sodium humate were compounded with chitosan and phenolic resin respectively, it was concluded that the stability efficiency of Mn in manganese slag was up to 55.7% for chitosan-insoluble humic acid composite; and the stability efficiency of Mn in manganese slag was up to 73.1% for phenolic resin-sulfonated humic acid composite.