Abstract:Batch experiments of equilibrium adsorption were carried out to investigate the effect of organic matter on sorption of phosphorus on sediment in Western Liaohe River. The results indicated that the sorption capacity of the sediment was 953.64 mg/kg, and the value reduced dramatically after organic matter was removed. The partition coefficient of phosphorus on the sediment was 40.50. Normalized partition coefficient and normalized carbon sorption capacity only accounted for 12.07% and 27.49% , the value of partition coefficient and sorption capacity respectively, which indicated that organic matter was main factor influencing the sorption of phosphorus on sediment. Light fraction of organic matter was a rubber-like domain, and partition may be the main process of sorption of phosphorus on it. The normalized partition coefficient of phosphorus on the light fraction was 77.13. On the other hand, the heavy fraction of the organic matter was glass transition matrix, it played a leading role in the sorption of phosphorus and the normalized carbon sorption capacity was 1225.63mg/kg. The sorption mechanism of phosphorus on the heavy fraction may be microhole filling apart from partition. Furthermore, the normalized carbon sorption capacity of tightly combined humus (humin) of the heavy fraction was 3546.69 mg/kg. Stably combined humus and tightly combined humus were important adhesive material in the formation of loose organo-mineral complexes. These may be the main sorption mechanism of phosphorus on sediment.
王而力, 王嗣淇. 西辽河沉积物有机组分对磷的吸附影响[J]. 中国环境科学, 2012, 32(4): 687-694.
WANG 而Li, WANG Si-Qi. Effect of organic matter on sorption of phosphorus on sediment in Western Liaohe River. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(4): 687-694.