In this study

the typical mangrove wetland soils from the Nanhaidi of Zhanjiang Bay were investigated to discuss the special habitat characteristics of mangrove wetland soil.The minerals in the soils were identified by Fourier transform infrared(FTIR) and X ray diffraction(XRD)

and the morphological characteristics of soil particles were observed by scanning electron microscopy(SEM) to obtain the chemical components.The soil samples from nearby mudflats were also collected for comparative study.Results showed that the mineral components in mangrove wetlands soils were mainly composed of kaolinite

quartz

muscovite

halloysite

diamond and serpentine

more diverse than those in mudflats soils which simply contained quartz and kaolinite.The morphologies of soil particles in mangrove wetland emerged in schistose aggregates

and the main elements were C

O

S

Al

Si

Mg and Fe

etc.Heavy metal elements such as Cu

Zn

Mo were commonly found in the soil particles of mangrove wetland.The mangrove wetland soil was also abundant in sulfide.However

the above characteristics were not found in the mudflats soil

which indicated that the mangrove wetland was in a special ecological environment

and its soil sediment was rich in organic matter

Fe and S

etc.Thus

it was more favorable for the enrichment of sulfides or heavy metals than mudflats.