Adsorption of phosphate from water on lake sediments amended with zirconium-modified zeolites in batch mode
作者： Mengjuan Yang , Jianwei Lin , Yanhui Zhan , Honghua Zhang
DOI: 10.1016/J.ECOLENG.2014.07.035
关键词:
摘要: Abstract Zirconium-modified zeolite (ZrMZ) may be a lake remediation tool designed to control the internal phosphorus (P) loading from sediments. Batch experiments were conducted investigate effect of adsorbent dosage on adsorption phosphate ZrMZ, as well characteristics raw and ZrMZ-amended The sequential extraction methods used forms P in phosphate-adsorbed ZrMZ. ZrMZ was effective for removal water. under laboratory conditions suggested that about 6% bound by release-sensitive, while 94% unlikely released reducing common pH (5–9) conditions. equilibrium data sediments at initial concentrations 1–12 mg/L could described Langmuir Freundlich isotherm models. kinetics followed pseudo-second-order model, process spontaneous endothermic nature. presence Cl − or SO 4 2− showed no competing sediments, HCO 3 SiO inhibited phosphate. zero-equilibrium concentration (EPC 0 ) sediment much lower than sediment. capacity higher Results this work indicate addition into can reduce potential phosphate–P release increase
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