- 中文核心期刊
- 中国科技核心期刊
- CSCD
- ISSN 1007-6336
- CN 21-1168/X
| Citation: |
CHENG Chen, GAO Zeng-wen, LI Yu-hao, LI Jing. The effect of α-FeOOH on adsorption kinetics of phosphorus and the solid concentration effect of resuspended sediments[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2020, 39(2): 189-194. DOI: 10.12111/j.mes20200204
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The effect of phosphorus-free α-FeOOH on the adsorption/desorption kinetics of phosphorus(P) and solid concentration effect of the resuspended sediments collected from Chengdao Oilfield in Bohai Sea were studied using batch experiments.The results indicated that α-FeOOH improved the rate, capacity of sediments adsorbing P, and the ratio of the amount of P adsorbed at fast stage to that at kinetic equilibrium on the sediments.In addition, the ratio of the amount of P desorbed to that pre-adsorbed on the sediments decreased with increasing α-FeOOH content, suggesting that α-FeOOH was unfavorable for sediments desorbing P.Freundlich coefficient (KF) ratio of sediments of 10 g/L to 2 g/L was closer to 1 with increasing α-FeOOH content in sediments, which meant the weakening of solid concentration effect.The effect of a concentration change of sediments on reversibility can be explored through the equation KF=a*S-b.The index of solid concentration effect, b, decreased with increasing the α-FeOOH content in sediments, which revealed that the potential mechanism of α-FeOOH weakening solid concentration effect was through reducing reversibility.This research provides an example for weakening the solid concentration effect under conditions of increasing the irreversibility of an adsorption system.
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