Question

What is natural organic matter and how does it contribute to the negative charge of the solid phase

Answer 1

Natural organic material refers to the large pool of carbon related compounds found within the natural and terrestrial and aqautic environments. this organnic matter is composed of organic compond that has come form the remains of organisms such as animals and plants and their wastages in the environment.

The charge of solid phase is P^H dependent.surface OH^{- groups on soil particles and organic matter are responsible for the development of pH dependent charge in wetland soils. under acidc conditions the avalability of excess protons results in development of positive charge on soil particles. under alkalline conditions loss of protons result in negitive charge on suface. when H+ ions are replaced with excess OH- ions, resultion in the formation of negative charge on mineral surface.}