Influence of the Fe(III): Modified clinoptilolite on phosphorus leaching from different soil types

Pavlović, Jelena; Krogstad, Tore; Rajić, Nevenka

doi:10.5937/zasmat1604539p

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The cause of the increase in specific surface area and total pore volume in the case of SMNZ in comparison to UNZ could be due to the creation of a secondary pore structure at the zeolite surface after modification. This finding is in accordance with [ 15 ] who showed surfactant modification of clinoptilolite zeolite increased the specific surface area from 29 to 140 m 2 g −1 and the total pore volumes from 0.1045 to 0.2460 cm 3 g −1 . On the other hand, the doping of nutrients decreased the specific surface area and pore volume in the unmodified and surfactant-modified zeolites based composites owing to the pore filling by the nutrients introduced into the zeolite structure.…”

Section: Resultssupporting

confidence: 93%

“…This may be because nitrate ions have some ligand ability to form inner-sphere complexes with oxide particles of iron (III) [ 47 ]. [ 15 ] further studied the influence of the Fe (III)-modified clinoptilolite on phosphorus leaching from soil and obtained a reduction of phosphorus leached from the sample of sandy soil compared with untreated soil. [ 26 ] also observed that the P loading on SMZ increased by a factor of 4.9 as compared to the unmodified zeolite and control soil.…”

Section: Resultsmentioning

confidence: 99%

“…The surfactant loading on the zeolite is a function of the external CEC of zeolite and the chain length of the cationic surfactant [ 13 ]. The use of natural zeolite (clinoptilolite) as nitrogen, phosphorus and potassium SRFs (as single element fertilizer) have been carried out in the past to facilitate plant growth [ 14 , 15 ]. [ 16 ] also prepared synthetic zeolite incorporated with macronutrients (Ca 2+ , Mg 2+ , PO 4 3− , NO 3 − ) to enhance nutrient availability in the soil.…”

Section: Introductionmentioning

confidence: 99%

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Fate of copper, nickel and zinc after biogas digestate application to three different soil types

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Eich‐Greatorex

Sogn

et al. 2017

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Soil application of organic residues from anaerobic digestion of municipal food waste and/or sewage sludge may introduce considerable amounts of heavy metals into the environment. In a column leaching experiment, mobility and release of Cu, Ni and Zn were investigated in three contrasting soils (sand, silt, loam) fertilized with biogas digestates of different origin. The effect of commercial digestates, based on food waste and sewage sludge, was compared to that of experimental digestates based on animal manure and whey permeate with or without fish ensilage, as well as untreated manure, mineral fertilizer and an untreated control. Manure and digestates were added to the columns as fresh material at equal amounts of available nitrogen. The experiment simulated high-intensity rainfall over a period of 7 days. In general, soil treated with the commercial digestates with higher original metal content showed less environmental impact in terms of Ni, Cu and Zn leaching than that treated with experimental digestates with lower original metal content and less than when animal manure or mineral fertilizer was applied. Although effects of digestate application on metal mobility in soils were seen in conditions of extreme precipitation, the leached concentrations of metals were below limitations published by the WHO but still significantly higher than that measured for control soils.

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Study of the iron(III)-modified clinoptilolite in the adsorption of phosphate from aqueous medium: mechanism and kinetics

Kaplanec¹,

ReÄnik²,

Mali³

et al. 2017

Desalination and Water Treatment

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a b s t r ac tClinoptilolite-rich tuff (Z) enriched with Fe(III) was studied in the removal of phosphate ions present in aqueous medium at pH = 6.5. Fe(III) modification was performed by a simple wet impregnation giving the product (FeZ) with about 18 wt% Fe. Transmission electron microscopy showed the presence of a flaky Fe(III) amorphous precipitate on the clinoptilolite sheets and a preserved clinoptilolite crystallinity. The modification increased the specific surface area from 28.6 to 140.3 m 2 g -1. FeZ effectively adsorbed phosphate, the removal rate at 298 K varying from 86% to 42.5% (for C 0 = 50 mg dm -3 and C 0 = 400 mg dm -3). The sorption isotherms were in accord with the Langmuir model, giving for the Langmuir constant (R L ) values in the range 0-1 that are characteristic of a favourable adsorption. The data for adsorption kinetics were best described by the pseudo-second-order model suggesting chemisorption as the phosphate sorption mechanism. Intra-particle diffusion was present in the adsorption, but it was not the rate-limiting step. A 31 P static spin-echo mapping nuclear magnetic resonance (NMR) measurement was performed for studying the phosphate-FeZ interaction. The results showed that the phosphate adsorption on FeZ proceeds through electrostatic interactions and covalent bonding, the latter being more pronounced.

show abstract

Influence of the Fe(III): Modified clinoptilolite on phosphorus leaching from different soil types

Cited by 3 publications

References 5 publications

Effects of natural and modified zeolite based composite fertilizers on slow release and nutrient use efficiency

Effects of natural and modified zeolite based composite fertilizers on slow release and nutrient use efficiency

Fate of copper, nickel and zinc after biogas digestate application to three different soil types

Study of the iron(III)-modified clinoptilolite in the adsorption of phosphate from aqueous medium: mechanism and kinetics

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