Relationships between mineral surfaces and organic carbon concentrations in soils and sediments

摘要: Abstract Relationships between mineral specific surface area and organic carbon (OC) concentration are examined for sediments soil A-horizons from throughout the world. I found (published elsewhere) that continental shelf many different regions exhibit downcore loss of OC to a refractory background level which shows consistent relationship with (slope = 0.86 mg m−2 OC). This trend is equivalent monolayer matter over all surfaces, termed monolayer-equivalent (ME) level. Sediments soils other environments compared this empirically derived relationship. Several slope areas show extension considerable depth. Marked excesses above trend, persist downcore, were in high carbonate content or low dissolved oxygen concentrations overlying water column. About half also adhered relationship, while content, pH, poor drainage showed higher than ME below deltaic delivery such as deep sea arid soils. The nature surfaces was using N2 adsorption-desorption isotherms, most be present pores