The speciation of phosphorus in the sand particles in Western Inner Mongolia

In this study, the SEDEX analytical method was used to study the speciation of phosphorus in the sands of Western Inner Mongolia. The bio-availability of phosphorus in sands were calculated. Furthermore, the possible impacts of phosphorus from the sands and marine ecosystem were also discussed. We reached the following conclusions: P_au was the main content of phosphorus in the western desert of Inner Mongolia with an average of 518.89μg·g^-1. Next to phosphorus was P_det with an average of 162.50μg·g^-1, the other three P which were likely used by species totaled 104.22μg·g^-1, accounting for 13.27%. The average of P_ex was 17.93μg·g^-1, accounting for 2.28%, The contents of TP, P_det and P_org were in reverse proportion to the size of particles, that is, the smaller of the grain size, the higher the carried P from the remote Inner Mongolia to East China Sea and the Pacific, remote transport PFe phosphorus present high contents in sands with larger grain size. The contents of exchangeable phosphorus and Fe-bound phosphorus are high at Qubqi and Ulan Buh desert, which are lower at Tengger, Badain Jaran desert. However, the specially condition is found for Ca-bound, residual and organic-bound phosphorus that their contents are higher at Tengger, Badain Jaran desert, which are lower at Qubqi and Ulan Buh desert.