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manganese ii chromate is a toxic and dangerous compound. It is present in waste water of metallurgical factories and needs to be cleaned up for human health and environment protection reasons. It is very difficult to remove chromium and manganese from the water because they are both very heavy metals. Therefore their removal from the water is a big problem for the industry.

This article describes a method for removal of the toxic hexavalent chromium (Cr(VI)) and manganese (II) from industrial sewage solutions using cation and anion exchange resins synthesized with long-chain cross-linking agents. The sorption capacity was investigated in batch experiments with different initial concentrations of hexavalent chromium and manganese. It was found that the sorption of manganese and hexavalent chromium by resins with LCA is very high because of their good ionic permeability resulting from elasticity of polymeric skeleton.

In the aqueous solution containing Mn (II) and Cr(VI), Mn(II) is adsorbed very rapidly, while Cr(VI) is adsorbed more slowly because of its higher negative charge. It was also found that the sorption process is controlled by both reductive and oxidative processes. The isotherms shown in Fig. 3 are kinetic curves of Mn (II) sorption on the cation exchanger with LCA, which shows its selectivity based on good ionic permeability of its polymeric skeleton.

Manganese is absorbed by the body mainly through food, such as spinach, tea and herbs. It is very important for the human body because it is needed in the iron-producing and protein-synthesis processes. It is toxic to humans only if consumed in large quantities, causing weakness and drowsiness. If inhaled, it can cause bronchitis and lung embolism.