[New method to assess phosphorus bioavailability in the sediments and soils].
A new method to assess phosphorus bioavailability in the sediments and soils was developed by using a homemade iron oxide/ cellulose acetate membrane(FeO/CAM). The results show that the amount of bioavailable phosphorus(FeO-P) desorbed from the sediment and soil increased with the shaking time,and FeO-P desorption would come to equilibrium after 16 ot 20h. With the increase of the ratio between soil mass and water volume, the quantity of the desorbed FeO-P would decrease and then went planar after 20 to 30g/L. The quantity of the desorbed FeO-P had no significant difference between the FeO/CAMs of 20 to 30cm2. The dynamics of FeO-P desorption from the sediments and soils would be accelerated by appropriately increasing the shaking frequency. In short, FeO/ CAMs overcome many disadvantages of iron oxide impregnated filter paper and are easy to be commercialized; therefore it may have a better future in the application to assessing phosphorus hioavailability in the sediments and soils.
Huang
Qing-hui
QH
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,Beijing 100085, China.
Wang
Dong-hong
DH
Ma
Mei
M
Wang
Chun-xia
CX
Wang
Zi-jian
ZJ
D001682:Biological Availability; D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D056890:Eukaryota / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry; D019015:Geologic Sediments / Q000032:analysis*; D008567:Membranes, Artificial; D010758:Phosphorus / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000032:analysis*
D005290:Ferric Compounds; D008567:Membranes, Artificial; D012987:Soil; C000499:ferric oxide; D010758:Phosphorus; C005062:acetylcellulose; D002482:Cellulose