Removal Of Phosphate And Fluoride From Optoelectronic Wastewater By Calcite

  • Impact of Phosphate on Fluoride Removal by Calcite

    Fluoride can be removed from wastewater by addition of calcite. However, fluoride is often found in complex mixtures where other contaminants can affect the removal process. Batch experiments were used to determine the impact of phosphate (PO 4 3) on the removal of fluoride from solution by calcite. In the experiments, up to

    Get Price
  • Coprecipitation of phosphate with calcite in a naturally ...

    In Black Lake the soluble reactive phosphorus (SRP) usually exceeds 250 µg P · liter −1. When calcite precipitation occurred during blooms of Aphanizomenon, SRP was completely removed from the photic zone. In blooms with no calcite formation, SRP changed little. These observations were replicated by splitting the lake with a curtain.

    Get Price
  • Fluoride Removal from Water by various techniques : Review

    Fluoride Removal from Water by various techniques : Review . ... granular calcite is utilized to catch fluoride present in water as calcium fluoride in a fluidized bed reactor by ... wastewater particularly for the removal and recovery of fluoride from its effluents. More than 90% of fluoride …

    Get Price
  • Removal of Phosphate from Aqueous Solutions Using ...

    Eutrophication is one of the most adverse impacts of nutrient contamination of water bodies where the phosphate is considered to be the primary limiting factor. The vaterite polymorph of porous calcium carbonate nanoparticles (VPCCNPs) were synthesized and used to remove orthophosphate ions in water. In this study, the VPCCNPs were synthesized chemically, using …

    Get Price
  • Precipitation Methods Using Calcium-Containing Ores for ...

    Minerals 2019, 9, 511 2 of 12 CaCl2 and CaO are added for precipitating fluoride in wastewater. Zeng, Ling, Li, Luo, Sui and Guan [20] used 0.84 g/L CaCl2 to precipitate fluoride in synthetic water with 400 mg/L F , 15.2 mg/L Ca2+ and 2.16 Mg2+, with high fluoride removal of 95.73%.Calcium hydroxide nanorods with dosage of 2 g/L were adopted for fluoride …

    Get Price
  • Pyrolysed powdered mussel shells for eutrophication ...

    Furthermore, the mechanisms of phosphate removal were determined by quantifying the phosphate content in all components before and after reaction with the synthetic wastewater. It was found that with excess of partially calcined pyrolysed shells, at a concentration of 5 g l −1 , more than 95% phosphate removal was achieved, irrespective of ...

    Get Price
  • 1. Introduction

    Freundlich isotherm of LDPO-G for fluoride and phosphate removal. (a) Removal of phosphate at 20, 30, and 40°C. (b) Removal of fluoride at 20, 30, and 40°C. (a) (b) Many adsorbents have been tested for their either phosphate or fluoride removal potentials from aqueous solutions and some of the results were summarized in Table 3.

    Get Price
  • Effective Low Cost Adsorbents for Removal of Fluoride from ...

    industrial discharge from aluminum industries, phosphate industries, coal plants as well as due to water, food, air, medicament and cosmetics. The total inorganic fluoride emissions from various industries are given in Table 1. Removal of fluoride from water is important because of the ill effects it causes.

    Get Price
  • Study about Doping Ion La3+ onto Surface of Pyrolusite Ore ...

    Fluoride and Phosphate from Wastewater NguyenThiHueandNguyenHoangTung ... where the dissolution of calcite occurred to form CaF2 precipitate.Otherwise,variousadsorbents,activatedalumina ... dynamics of phosphate and fluoride removal, two types. 4 JournalofChemistry (a) (b)

    Get Price
  • Removal of high-concentration phosphate by calcite: …

    Removal of high-concentration phosphate by calcite: Effect of sulfate and pH Yun Liu a,⁎, Xia Sheng b, Yuanhua Dong a,⁎, Yijie Ma a a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, 210008 Nanjing, China b Mineral construction branch, Yanzhou Mining Group, Donghua Construction Co., Ltd. Yanzhou …

    Get Price
  • Fluoride Removal by Calcite: Evidence for Fluorite ...

    Fluoride contamination of groundwater, both anthropogenic and natural, is a major problem worldwide. In this study, fluoride removal by crushed limestone (99% pure calcite) was investigated by batch studies and surface-sensitive techniques from solutions with fluoride concentra tions from 150 μmol/L (3 mg/L) to 110 mM (∼2100 mg/L). Surface-sensitive …

    Get Price
  • Fluoride Removal from Contaminated Water by Limestone ...

    This fluoride removal efficiency was higher than with the limestone reactor of Reardon and Wang (by a further reduction of 1.19 mg/L fluoride in total) yet still lower than the predicted efficiency. One important reason of the lower fluoride removal efficiency than with prediction is that the citrate ions suppressed the precipitation of calcite.

    Get Price
  • Removal of Phosphate Using Ettringite Synthesized from ...

    May 25, 2018· Removal of phosphate and fluoride from optoelectronic wastewater by calcite. International Journal of Environmental Technology and Management, 12, 308–321. Han, C., Wang, Z., Yang, W., Wu, Q., Yang, H., & Xue, X. (2016). Effects of pH on phosphorus removal capacities of basic oxygen furnace slag.

    Get Price
  • Extraction of Phosphate from Polluted Waters Using Calcium ...

    3.2. Effect of Adsorption Parameters on Phosphate Removal. The effect of physicochemical parameters, namely, pH, adsorbent concentration, equilibration time, initial concentration of adsorbate, and temperature on the adsorptive removal of phosphate from simulated wastewater samples, was analyzed adopting batch mode of adsorption methods.

    Get Price
  • Removal of phosphate and fluoride from optoelectronic ...

    Feb 11, 2010· Removal of phosphate and fluoride from optoelectronic wastewater by calcite Ekaterina K. Gunawan Related information 1 Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Road, Section 4, Taipei 106, Taiwan.

    Get Price
  • Reduction of Fluorine-containing Industrial Waste Using ...

    tion fluorine waste water. Focusing on the high fluorine removal capability of aluminum, and the good dehydrating capability and low cost of calcium, we examined a treatment method that decreases waste sludge. 3.2 Waste water treatment using aluminum-solubility method We experimented with a waste water treatment based on an

    Get Price
  • Simultaneous Removal Behavior of Phosphate and Fluoride ...

    Using scallop shell powder (calcite CaCO 3) instead of the calcium ion increased removal efficiency (%) of fluoride and phosphate ions to 92% and 97% at 48 h, respectively. This was ascribed to alkaline condition of pH higher than 8 due to the solution of CaCO 3 …

    Get Price
  • REMOVAL OF FLUORIDE FROM WASTEWATER BY …

    Other researchers utilised calcite to remove fluoride ion from industrial wastewater containing HF [23, 24]. Gogoi and Dutta [25] revealed that the addition of phosphoric acid to limestone enhanced the removal of fluoride by increasing the removal capacity to 4.38 mg/g of limestone. In another study by Nath et al. [15],

    Get Price
  • Removal of high-concentration phosphate by calcite: Effect ...

    Mar 15, 2012· In this work, the removal of phosphate with or without added sulfate at various concentrations was studied at 48 h and at pH 4.5 or 13.0 ().Compared to the results without the addition of sulfate at pH 4.5, low SO 4 2− /PO 4 3− ratios of 1.5 and 3.0 enhanced the removal of phosphate. Because sulfate increased dissolution of calcite and promoted calcium release from calcite, more …

    Get Price
  • Simultaneous Removal Behavior of Phosphate and Fluoride ...

    Using scallop shell powder (calcite CaCO 3) instead of the calcium ion increased removal efficiency (%) of fluoride and phosphate ions to 92% and 97% at 48 h, respectively. This was ascribed to alkaline condition of pH higher than 8 due to the solution of CaCO 3 , accelerating fluorine-containing apatite formation.

    Get Price
  • (PDF) Fluoride adsorption from aqueous solution by a ...

    Effect of pHThe removal of fluoride by polycinnamamide thorium (IV) phosphate at different pH was studied (Fig. 4) and was found that the percentage removal decreased from 90.1% to 77.9%, 86.9% to 74.2% and 84.2% to 69.9% for increase in pH from 2 to 12, for initial fluoride concentration of 1 mg/L, 5 mg/L and 10 mg/L respectively.

    Get Price
  • ‪IDAA Warmadewanthi‬ - ‪Google Scholar‬

    Removal of phosphate and fluoride from optoelectronic wastewater by calcite EK Gunawan, xxxx Warmadewanthi, JC Liu International Journal of Environmental Technology and Management 12 (2-4 … , 2010

    Get Price
  • Impact of Phosphate on Fluoride Removal by Calcite ...

    Fluoride can be removed from wastewater by addition of calcite. However, fluoride is often found in complex mixtures where other contaminants can affect the removal process. Batch experiments were used to determine the impact of phosphate (PO 4 3−) on the removal of fluoride from solution by calcite

    Get Price
  • Measurement of Surface Phosphate on Hydroxylapatite and ...

    Removal of phosphate and fluoride from optoelectronic wastewater by calcite. International Journal of Environmental Technology and Management 2010 , 12 (2/3/4) , 308.

    Get Price
  • Mechanisms and Applications of the Synthesized Fusiform ...

    Jan 28, 2016· Removal of phosphate and fluoride from optoelectronic wastewater by calcite. International Journal of Environmental Technology …

    Get Price
  • Calcium Phosphate Precipitation in Wastewater Treatment

    In wastewater of moderate alkalinity and hardness, a phosphate removal in excess of 80% was consistently achieved at pH 9. 5 with lime doses of, at the most, 200 mg/ liter as CaCO3. The overall phosphate removal performance was dictated by the performance of the precipitation reactor and its ensuing sedimentation basin.

    Get Price
  • Adsorption and precipitation of fluoride on calcite ...

    Aug 17, 2015· In addition, calcite has been used for removal of phosphate and fluoride simultaneously from optoelectronic wastewater. Adsorption of fluoride using calcite mainly depends on initial concentration, pH, and temperature. The amount of fluoride removed is also dependent on the particle size and the surface area of the adsorbent.

    Get Price
  • Removal of Fluoride from Groundwater by Carbonised …

    conut shell. Several adsorbents especially for the removal of fluoride anion from the aqueous solution have been developed, namely activated alumina, bone char, calcite, clay, zeolite, rare metal-loaded resins, etc. [34] [35] Activated alumina is quite effective for the removal of fluoride, while the leaked Al3+ in the drinking water may

    Get Price
  • Investigating the efficiency of surfactant-modified ...

    References. J. Ray, S. Jana, T. Tripathy, Synthesis of dipolar grafted hydroxyethyl cellulose and its application for the removal of phosphate ion from aqueous medium by adsorption, Int. J. Biol. Macromol., 109 (2018) 492–506.

    Get Price
  • Removal of phosphate and fluoride from optoelectronic ...

    Feb 11, 2010· Removal of phosphate and fluoride from optoelectronic wastewater by calcite Ekaterina K. Gunawan Related information 1 Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Road, Section 4, …

    Get Price