DOI: 10.1016/j.watres.2018.09.005
Scopus记录号: 2-s2.0-85053075082
论文题名: Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer
作者: Yan H. ; Chen Q. ; Liu J. ; Feng Y. ; Shih K.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 721
结束页码: 730
语种: 英语
英文关键词: Desorption
; Fertilizer
; Layered double hydroxides
; Phosphorus recovery
; Struvite
Scopus关键词: Ammonia
; Biochemistry
; Desorption
; Eutrophication
; Fertilizers
; Ion exchange
; Ions
; Minerals
; Nanocomposites
; Precipitation (chemical)
; Recovery
; Sodium hydroxide
; Calcined layered double hydroxides
; Desorption process
; Dissolution-reprecipitation
; Layered double hydroxides
; Phosphate adsorbents
; Phosphorus recovery
; Saturation capacities
; Struvites
; Adsorbents
; adsorption
; ammonia
; bioavailability
; desorption
; fertilizer
; hydroxide
; ion exchange
; leaching
; nanoparticle
; phosphorus
; pollutant removal
; recovery
; struvite
英文摘要: Phosphorus (P) recovery from waste streams is attracting more attention due to the twin problems of aquatic eutrophication and global phosphorus scarcity. Layered double hydroxide mineral materials are promising phosphate adsorbents due to their excellent anion-exchange abilities and large surface area. In this study, the adsorption isotherms estimated the saturation capacity of calcined layered double hydroxide (LDH) nano-composites for phosphate as 100.7 mg-P/g-adsorbent. Ion exchange is proposed as the major mechanism in the sorption process. The commonly utilized desorption method via sodium hydroxide was found to cause recrystallization of LDH particles in increased crystal size based on the dissolution-reprecipitation (D-R) mechanism. Ammonia solution was used to desorb P from LDH adsorbent. However, struvite crystallization occurred during the desorption process because struvite has a higher precipitation tendency than LDH with sufficient NH4 + ions. The comparison of P leaching behavior among P-adsorbed LDH, ammonia-treated LDH, and pure struvite samples demonstrates that ammonia desorption probably weakened the interaction between phosphate species and LDH cationic layers, thus enhancing the bioavailability of P in LDH adsorbents. The ammonia-treated LDH has a high potential to serve like struvite as a P slow-releasing fertilizer. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112437
Appears in Collections: 气候减缓与适应
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作者单位: Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing, 210098, China; Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong; Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
Recommended Citation:
Yan H.,Chen Q.,Liu J.,et al. Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer[J]. Water Research,2018-01-01,145