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A Novel Technique for Water Recovery and Land …
1 A Novel Technique for Water Recovery and Land Reclamation Using Phosphatic Clay and Sand Tailings H. El-Shall1, J. Hazen2, P. Zhang3, M.F. Raslan4, L. Bromwell5 ...
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The Florida Institute of Phosphate Research was created in …
Conventionally, the clay is disposed of in settling areas by transporting it in a slurry form, solids. at an average density of 3 to 4% The traditional phosphatic clay disposal procedure is quite simple. 20- to 60-ft high dikes are constructed around areas 300 to 800 acres in extent. The clay slurry (3 to 5 pct solids) is
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Argon Plasma Treated Phosphatic Clays for Efficient Heavy …
Keywords Phosphatic clay · Argon plasma treatment · Pb(II) immobilization · Waste reclamation With the rapid industrialization and population growth in the past decades, the increasing global heavy metal pollution has become one of the critical environmental problems (Cal - lender and Rice 2000 ; Martín et al. 2015 ). Heavy metal ions
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Flocculation Dewatering Clay
In another study of phosphatic clay wastes, the physical, chemical, and mineralogical characteristics of slime samples from 15 operating plants were determined and compared. ... proper mixing of the clay-waste feed and flocculant, (2) rapid removal of water as it is released, and (3) physical manipulation to promote cohesion of solids. by David ...
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Utilization of Phosphatic Clay Waste in Concrete
Phosphatic clay is a by-product of phosphate mining in Florida. 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 to yield high strength concrete would be a boon for both materials involved. This project ...
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FIELD DEMONSTRATION/EVALUATION OF A RAPID …
RAPID CLAY DEWATERING AND . CONSOLIDATION PROCESS USING OTHER . WASTES (FIPR/DIPR PROCESS) TO MINIMIZE . CLAY SETTLING PONDS . FINAL REPORT . Prepared by . ... processing; disposal and utilization of phosphatic clay; and environmental effects involving the health and welfare of the people, including those …
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(71d) Efficient Continuous Electrokinetic Dewatering of Phosphatic Clay
RAPID RAPID Manufacturing Institute ; DIPPR Design Institute for Physical Properties ; SBE ...
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Effects of electro-osmosis on the properties of high plasticity clay
As noted in Fig. 2, the volume of drained water showed rapid growth at first and then reached a steady state. For instance, the 80% of total drainage was extracted at less than 5 days for stainless steel and voltage gradient 2(V/cm). ... Microstructure of clay fabric in electrokinetic dewatering of phosphatic clay dispersions. Appl. Clay Sci ...
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A Novel Technique for Water Recovery and Land …
Since the 1950's, the problems associated with phosphatic clay disposal have stimulated research efforts to find economical and practical methods for dewatering and consolidating phosphatic clays.
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Controlling Harmful Algal Blooms Through Clay Flocculation1
and a few clay-rich sediments (e.g. Florida phosphatic clays) showed high removal abilities (e.g. . 80% cell removal effi-ciency) against Karenia brevis, the primary study organism (Fig. 1). Typically, montmorillonites and montmorillonite-con-taining sediments, such as phosphatic clay, had much higher removal abilities than kaolinites and ...
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Reclamation of Phosphatic Clay Waste Ponds by Capping
rapid reclamation techniques are encouraged. There are basically two approaches to increasing the dewatering rate of phosphatic waste clays; the beneficiation process can be altered ... geotextiles for capping phosphatic waste clay ponds and, thus, to enhance the consolidation process of these materials, for the purpose of
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Chemical Engineering at the University of Florida
[xvi] Electrokinetic methods have been demonstrated to increase solids content of phosphate clay from 15 percent to 30 percent in 24 hours. 11 In a separate study, the solids content of clay was increased from 17 percent to 60 percent in 30 hours. 7 Therefore it appears that electrokinetic methods can decrease significantly the time required to ...
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A Novel Technique for Water Recovery and Land Reclamation …
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Characterization of aqueous lead removal by phosphatic clay
Phosphatic clay has a characteristically high content of natural apatite (∼24–32% of dry weight), which is too fine-grained to recover during processing. ... It can be concluded that Pb sorption kinetics were biphasic, initially rapid reaction followed by slow continuous sorption reaction most likely resulting from precipitation, followed ...
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Utilization of Phosphatic Clay Waste in Concrete
Phosphatic clay is a by-product of phosphate mining in Florida. This waste material occupies about 100,000 acres of land which could be utilized for other causes. Thus, its …
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Rheology and mineralogy as related to engineering properties of
The slurry yield strength provides a simple and on-line flow measurement which can be used for rapid design feedback, necessary for the economical and safe disposal of these materials. ... All of the phosphatic clay fabrics were flocculated; however, the bond frequency and bond strengths were different. The slurry yield strength and Atterberg ...
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Dewatering of Fine Particle Clay Waste with Flocculant
The overall natural settling rate of phosphatic clay waste is extremely slow (U.S. Bureau of Mines, 1975). Generally, the clay wastes have a rapid initial settling rate, thickening from a nominal 3 percent solids to 10 percent solids in a week and to 15 percent solids m about 3 months.
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(PDF) Pilot-Scale Demonstration of Deep Cone™ Paste
A typical yield curve has the characteristic of an extremely rapid increase in. ... Thickening Process for Phosphatic Clay Disposal", FIPR Publication 02-162-229. 21. Citations (15)
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Pilot-Scale Demonstration of Deep Cone™ Paste Thickening …
DOI: 10.1080/052783 Corpus ID: 95155328; Pilot-Scale Demonstration of Deep Cone™ Paste Thickening Process for Phosphatic Clay/Sand Disposal @article{Tao2010PilotScaleDO, title={Pilot-Scale Demonstration of Deep Cone{texttrademark} Paste Thickening Process for Phosphatic Clay/Sand Disposal}, …
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The Determination of Bound Water in Waste Phosphatic Clay
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 …
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Grace, at its Four Corner
state-of-the-art of phosphatic clay dewatering ... EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian český русский български العربية Unknown
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(71d) Efficient Continuous Electrokinetic Dewatering of …
RAPID RAPID Manufacturing Institute ; DIPPR Design Institute for Physical Properties ; SBE ...
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Crust Formation and Desiccation Characteristics for Phosphatic Clays
The traditional phosphatic clay disposal procedure is quite simple. Twenty- to sixty-foot high dikes are constructed around areas 300 to 800 acres in extent. The clay slurry (3 to 5 pct solids) is pumped into the impoundments at a rate of 20,000 to 80,000 gpm.
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Phosphatic waste clay: Origin, composition
Phosphate ore (also known as "matrix") contains three different groups of minerals, which should be separated from each other. These minerals are phosphate minerals, clay minerals, and quartz, or sand. As mined, sand particles and the phosphate …
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Dewatering of industrial clay wastes (Technical Report) | OSTI.GOV
In laboratory experiments, coal-clay waste, potash-clay brine slurry, phosphatic clay waste, uranium tailings, and talc tailings were successfully consolidated. Coal-clay waste was consolidated from 3.6 to 57%; potash-clay brine slurry was consolidated from 3.8 to 35%; phosphatic clay waste from 15.6 to 49%; uranium tailings from 15.4 to 67% ...
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Official Series Description
The texture is mostly silt loam or silty clay loam, but includes silty clay and clay in severely eroded areas. Some pedons have a transitional between the Ap and Bt horizons. The Bt horizon has hue of 10YR or 7.5YR, value of 4 or 5 and chroma of 4 to 8. The texture is silty clay or clay except the upper few inches is also silty clay loam.
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Productivity of clay tailings from phosphate mining: I. Biomass …
Phosphatic clay is a byproduct of phosphate mining. Presently more than 40,470 ha have been created, most in central Florida, and about 810 ha are being added each year. Phosphatic clays have high fertility and high water holding capacity, reducing fertilization costs and producing high yields without irrigation. Based on 10 years of research ...
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Preparation and characterization of functionalized hybrid
Singh SP, Ma LQ, Harris WG (2001) Heavy metal interactions with phosphatic clay: sorption and desorption behavior. J Environ Qual 30:1961–1968. ... (2009) Amino acid containing amorphous calcium phosphates and the rapid transformation into apatite. J Mater Chem 19:4906–4913. Article Google Scholar
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Enhanced leaching recovery of rare earth elements from a phosphatic
Phosphatic clay is a waste material produced during the beneficiation of phosphate ore, which likely poses severe environmental problems. In this study, a phosphatic clay containing 258 ppm of total rare earth elements (REEs) was used as a feedstock for REE recovery. By reacting with 0.1 M HCl at 75 °C for 3 h, around 36 % of …
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A comprehensive study on modified-pillared clays as an …
Heavy metal interactions with phosphatic clay: kinetic and equilibrium studies. Chem. Eng. J. (2012) S ... The ultrasound aided rapid chromium pillared clay adsorbent synthesis process proposed in this study enables the reuse of the intercalating solution over three cycles without discharge into the environment and led to a non …
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