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Abstract:
Preparing adsorbents with hydrated phosphorophilic metal oxide modified porous materials is a promising method for recovering phosphorus from wastewater. In this study, three kinds of adsorbents were developed by loading iron (III), zirconium (IV) and lanthanum (III) on diatomite under the same preparation conditions (referred to as D-HFO, D-HZO, D-HLO, respectively). The property differences and phosphorus adsorption behavior differences of three adsorbents in actual wastewater were explored. Characterization results indicated that three metals were mainly supported on diatomite in the form of hydrated oxides with nanostructures. In batch experiment, the adsorption capacity of D-HFO, D-HZO was high under acidic conditions, while D-HLO tended to adsorb phosphorus in neutral or slightly alkaline environment. The maximum adsorption capacities of D-HFO, D-HZO, D-HLO to adsorb phosphorus from wastewater were 13.22, 20.25, 148.31 mg/g, respectively. Yet in fixed-bed column experiment, D-HLO particles agglomerated due to its high chemical energy, and the maximum treatment bed-volume (BV) of D-HFO, D-HZO, D-HLO were 120, 315, 210 BV, respectively. LangmuirLangmuir fitting results showed that the chemical precipitation contribution rate of phosphorus adsorbed on DHFO, D-HZO, D-HLO was 83.5%, 63.8%, 86.2%, respectively. Ligand exchange and surface complexation were the main recovery mechanisms in phosphorus adsorption process from the actual wastewater by three adsorbents.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN: 0927-7757
Year: 2021
Volume: 623
5 . 2 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:96
JCR Journal Grade:2
Cited Count:
WoS CC Cited Count: 11
SCOPUS Cited Count: 11
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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