There are many methods in utilizations of nitro-humic acids as follows:
1.purely organochemical methods,
2.utilizations on soil and clay colloids,
3.methods of using reactions of nitro-humic acids with phosphates,
4.methods of using nitro-humic acids as pH buffer materials, etc.
Thisreview has given the research outlines and future promises of these methods.especially in relation to the chemical structures of nitro-humic acids.
The: author who has studied on nitro-humic acids for many years expects strongly thatthe utilizations of nitro-humic acids will play an important part in future developments ofcoal chemical industries.
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