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(PDF) A Novel Technique for Water Recovery and Land ...

Jun 15, 2018· 1. Introduction. Clay minerals (e.g. montmorillonite and kaolinite) are common waste products in the mining industry and have diverse structural and physical properties, such as anisotropic shape, large surface area, and varying types of charges (McFarlane et al., 2005).When dispersed in an aqueous media, the clay minerals exhibit a low dewatering rate due to formation of porous structures …

The physico

Phosphatic clays arise as a waste product of the Florida phosphate mining industry. The clays exist initially as a 2-6 solids weight percent slurry which is pumped to large impoundment areas for natural settling. The clay settling process takes as long as 25 years to reach a value of 40wt% solids.

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18 Phosphatic clay s are composed of approximately one third phosphate ores o ne third silica, and one third clay. ... Supernatant water with a pH value of 11.7 demonstrated a free settling behavior, whereas clay suspensions with a pH value of 11.7 had a poorer sedimentation than those with pH value of 7.1. These two results show that the basic ...

Evaluation of Phosphatic Clay Disposal and Reclamation ...

Aug 25, 2006· In order to gain insight into the overall Pb removal behavior of phosphatic clay, kinetic experiments were conducted using batch tests. A total of 0.5 g phosphatic clay powder was weighed into 250 mL polycarbonate bottles and preequilibrated with 150 mL of 0.05 M KNO 3 as a background electrolyte solution.

Clay Dewatering

Dizon [27,30] performed the slump test on phosphatic clay and demonstrated that the onset of viscoelastic-solid behavior and pseudoplastic behavior occurred at solids content of 7.5 wt% and 29 wt%, respectively. Phosphatic clay with a solids content greater than 7.5 wt% has a clay skeleton capable of supporting stress.

Phosphate Sorption‐Desorption Behavior of Some Acidic ...

624 Soil Science Society of America Journal where b is the maximum sorption, k is the sorption strength, and C is the equilibrium P concentration. The b-and k values ob tained for each soil are reported in Table 1. Schmitt et al. (2017) reported a much more detailed relationship between b and k and soil properties for the soils used in this study in addition to

Phosphorus adsorption and desorption behavior on sediments ...

phosphatic clay slurry, phosphatic clay mixed with cover soil, and phosphatic clay mixed with spoil material. Permeability results are considered first followed by the effluent chemical analysis results. Permeability Results. The results of the permeability tests in which the phosphatic clay was placed in the form of a slurry are shown in Table 3.

The physico

A Novel Technique for Water Recovery and Land Reclamation Using Phosphatic Clay and Sand Tailings Book PDF Available. January 2008; ... parameters and to predict the behavior of clay …

Market potential for feed grains and alfalfa hay produced ...

Consequently, the mixture of phosphate sludge and clay can be used as raw materials in the production of glass–ceramics. Conclusion. The study focused on the mineralogical and chemical characterization of the phosphate sludge and the study of its thermal behavior alone and when mixed with Safi clay.

Phosphorus Mobility and Behavior in Soils Treated with ...

Apr 23, 1996· The mining of phosphate ore in Central Florida is done by an open-pit method whereby the overburden is stripped to expose the phosphate ore called "matrix". The thickness of the matrix varies from one to fifty feet and consist essentially of 1/3 phosphate ore, 1/3 sand and 1/3 clay.

Effect of temperature and clay addition on the thermal ...

Consequently, the mixture of phosphate sludge and clay can be used as raw materials in the production of glass–ceramics. Conclusion. The study focused on the mineralogical and chemical characterization of the phosphate sludge and the study of its thermal behavior alone and when mixed with Safi clay.

WOA1

Heavy metal interactions with phosphatic clay: Sorption and desorption behavior Article in Journal of Environmental Quality 30(6):1961-8 · November 2000 with 261 Reads How we measure 'reads'

Enhancing Percolation in Phosphatic Clay Using Diatoms ...

Phosphatic clay is a by-product of phosphate strip mining, particularly in Florida, USA. This waste material occupies about 100 000 acres of land which could be utilized for other causes. Thus, its use as an alternating cementing material for the addition into the mixing matrix of cement paste and concrete to yield higher strength would be profitable for both materials involved.

USA1

The novel adsorbents, metal-ions-loaded collagen fiber (MICF), were prepared by loading Zr(IV) and Fe(III) onto collagen fiber, and the adsorption behavior of phosphate in aqueous solutions on MICF was investigated. The results of batch experiments indicated that the high adsorption capacities of phosphate take place in the pH range of 3.0−6.0. The adsorption capacity of phosphate on Zr ...

Mathematical model and optimization of continuous electro ...

Jun 15, 2018· 1. Introduction. Clay minerals (e.g. montmorillonite and kaolinite) are common waste products in the mining industry and have diverse structural and physical properties, such as anisotropic shape, large surface area, and varying types of charges (McFarlane et al., 2005).When dispersed in an aqueous media, the clay minerals exhibit a low dewatering rate due to formation of porous structures …

Mathematical model and optimization of continuous electro ...

Jun 28, 2018· Clay settling areas are large impoundments brought about by phosphate mining with water-holding capacity that renders it very poor for agriculture and crop production. This study aims to enhance water percolation in phosphatic clay using porous diatom frustules under laboratory conditions. Phosphatic clay collected from settling areas was brought to the laboratory for the experiment.

(PDF) DEWATERING OF PHOSPHATIC SLIMES BY CARBONATE …

phosphatic clay slurry, phosphatic clay mixed with cover soil, and phosphatic clay mixed with spoil material. Permeability results are considered first followed by the effluent chemical analysis results. Permeability Results. The results of the permeability tests in which the phosphatic clay was placed in the form of a slurry are shown in Table 3.

Characterization of aqueous lead removal by phosphatic ...

Heavy metals produced and released during agricultural and industrial activities may pose a serious threat to the environment. This study investigated the effectiveness of phosphatic clay, a by‐product of the phosphate mining industry, for immobilizing heavy metals (Pb +2, Cd +2, and Zn +2) from aqueous solutions.A batch equilibrium technique was adopted to evaluate metal sorption in the ...

Adsorption of phosphate on iron oxide doped halloysite ...

Mar 01, 2019· Excess phosphate in water is known to cause eutrophication, and its removal is imperative. Nanoclay minerals are widely used in environmental remediation due …

Settling of supernatant from semicontinuous electrokinetic ...

The elemental compositions of the phosphatic clay were identified using an X-ray fluorescence spectrometer, and was found to be mainly composed of CaO and P2O5. The specific surface area, pore volume and average pore diameter were measured also. Results of experiment show that the phosphatic clay may provide a cost-effective way to remediate ...

Ecohydrologic Evaluation of Wetlands on Phosphatic Clay ...

Jun 28, 2018· Clay settling areas are large impoundments brought about by phosphate mining with water-holding capacity that renders it very poor for agriculture and crop production. This study aims to enhance water percolation in phosphatic clay using porous diatom frustules under laboratory conditions. Phosphatic clay collected from settling areas was brought to the laboratory for the experiment.

Microstructure of clay fabric in electrokinetic dewatering ...

Volume 2: Centrifugal Modeling of the Consolidation Behavior of Phosphatic Clay Mixed with Lime or Gypsum. University of Florida. April, 1988. FIPR Publication No. Volume 3: Evaluation of the Use of Geotextiles for Capping Phosphatic Waste Clay Ponds. University of Florida. April, 1988. FIPR Publication No.

Phosphorus Behavior in Soil

This was basic research aimed at understanding the fundamentals of clay particle behavior and is typical of numerous characterization studies of phosphatic clays undertaken by various investigators. Other characterization studies also described the variations among the minerals making up the phosphatic clays throughout the phosphate mining ...

ENGINEERING EVALUATION OF WASTE PHOSPHATIC

Phosphatic clay waste generated during the mining and beneficia tion of phosphate ore is disposed by impoundment behind earthen dams (Scheiner and Stanl ey, 1993). The Florida