Fluoride Action Network

Fluoride removal by thermally treated egg shells with high adsorption capacity, low cost, and easy acquisition

Source: Environmental Science and Pollution Research | Lee JI, Hong SH, Lee CG, Park SJ.
Posted on March 7th, 2021
Location: International
Industry type: Water Treatment

In this study, the use of eggshells was suggested as an adsorbent for fluoride removal, and their mechanism of fluoride removal was investigated. The eggshells underwent thermal treatment to improve their adsorption capacity; 800 °C was found to be the optimal temperature for treatment. Eggshells thermally treated at 800 °C (ES-800) were mainly composed of Ca (82.4%) and C (15.9%), and the peaks of ES-800 obtained from X-ray diffraction (XRD) corresponded to calcite, portlandite, and lime. Fluorine adsorption by ES-800 reached 70% of the equilibrium adsorption amount within 15 min and gradually increased until 24 h. The maximum adsorption capacity of ES-800 at pH 7 and 25 °C was 258.28 mg/g, which is 18 times larger than that of activated alumina; this is classified as the best available technology by the United States Environmental Protection Agency. Both enthalpy and entropy increased in the process of fluoride adsorption onto ES-800. Fluoride adsorption of ES-800 decreased from 59.16 to 11.85 mg/g with an increase in pH from 3 to 11. Fluoride adsorption decreased in the presence of anions, whose impact follows the order: HPO43- > HCO3 >> SO42- > Cl. XRD, and X-ray photoelectron spectroscopy analysis revealed that fluoride removal was achieved by the formation of calcium fluorite (CaF2). Thus, it can be concluded that eggshells can function as highly efficient adsorbents for fluoride removal, replacing bone char and activated alumina; further, their adsorption capacity can be improved by thermal treatment.


*Original abstract online at https://link.springer.com/article/10.1007%2Fs11356-021-13284-z


References

  1. Affonso LN, Marques JL Jr, Lima VV, Gonçalves JO, Barbosa SC, Primel EG, Burgo TAL, Dotto GL, Pinto LAA, Cadaval TR Jr (2020) Removal of fluoride from fertilizer industry effluent using carbon nanotubes stabilized in chitosan sponge. J Hazard Mater 388:122042

    CAS  Article  Google Scholar

  2. Ahmad M, Hashimoto Y, Moon DH, Lee SS, Ok YS (2012) Immobilization of lead in a Korean military shooting range soil using egg-shell waste: an integrated mechanistic approach. J Hazard Mater 209:392–401

    Article  CAS  Google Scholar

  3. Alkurdi SS, Al-Juboori RA, Bundschuh J, Hamawand I (2019) Bone char as a green sorbent for removing health threatening fluoride from drinking water. Environ Int 127:704–719

    CAS  Article  Google Scholar

  4. Annadurai G, Ling LY, Lee JF (2008) Adsorption of reactive dye from an aqueous solution by chitosan: isotherm, kinetic and thermodynamic analysis. J Hazard Mater 152(1):337–346

    CAS  Article  Google Scholar

  5. Asouhidou DD, Triantafyllidis KS, Lazaridis NK, Matis KA (2009) Adsorption of Remazol Red 3BS from aqueous solutions using APTES-and cyclodextrin-modified HMS-type mesoporous silicas. Colloid Surf A 346(1-3):83–90

    CAS  Article  Google Scholar

  6. Ayoob S, Gupta AK (2008) Insights into isotherm making in the sorptive removal of fluoride from drinking water. J Hazard Mater 152(3):976–985

    CAS  Article  Google Scholar

  7. Ayoob S, Gupta AK, Bhat VT (2008) A conceptual overview on sustainable technologies for the defluoridation of drinking water. Crit Rev Environ Sci Technol 38(6):401–470

    CAS  Article  Google Scholar

  8. Bhatnagar A, Kumar E, Sillanpää M (2011) Fluoride removal from water by adsorption—a review. Chem Eng J 171(3):811–840

    CAS  Article  Google Scholar

  9. Bhaumik R, Mondal NK, Das B, Roy P, Pal KC, Das C, Baneerjee A (2012) Eggshell powder as an adsorbent for removal of fluoride from aqueous solution: equilibrium, kinetic and thermodynamic studies. J Chem-NY 9(3):1457–1480

    CAS  Google Scholar

  10. Budyanto S, Kuo YL, Liu JC (2015) Adsorption and precipitation of fluoride on calcite nanoparticles: a spectroscopic study. Sep Purif Technol 150:325–331

    CAS  Article  Google Scholar

  11. Çengelo?lu Y, K?r E, Ersöz M (2002) Removal of fluoride from aqueous solution by using red mud. Sep Purif Technol 28(1):81–86

    Article  Google Scholar

  12. Chai L, Wang Y, Zhao N, Yang W, You X (2013) Sulfate-doped Fe3O4/Al2O3 nanoparticles as a novel adsorbent for fluoride removal from drinking water. Water Res 47(12):4040–4049

    CAS  Article  Google Scholar

  13. Chaudhary M, Maiti A (2019) Defluoridation by highly efficient calcium hydroxide nanorods from synthetic and industrial wastewater. Colloid Surf A 561:79–88

    CAS  Article  Google Scholar

  14. Chen N, Zhang Z, Feng C, Sugiura N, Li M, Chen R (2010) Fluoride removal from water by granular ceramic adsorption. J Colloid Interface Sci 348(2):579–584

    CAS  Article  Google Scholar

  15. Chojnacka K (2005) Biosorption of Cr (III) ions by egg-shells. J Hazard Mater 121(1-3):167–173

    CAS  Article  Google Scholar

  16. Cooney DO (1998) Adsorption design for wastewater treatment. CRC press, USA

    Google Scholar

  17. Dada AO, Olalekan AP, Olatunya AM, Dada OJIJC (2012) Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms studies of equilibrium sorption of Zn2+ unto phosphoric acid modified rice husk. IOSR-J Appl Chem 3(1):38–45

    Article  CAS  Google Scholar

  18. De la Puente G, Pis JJ, Menéndez JA, Grange P (1997) Thermal stability of oxygenated functions in activated carbons. J Anal Appl Pyrolysis 43(2):125–138

    Article  Google Scholar

  19. Dou X, Mohan D, Pittman CU Jr, Yang S (2012) Remediating fluoride from water using hydrous zirconium oxide. Chem Eng J 198:236–245

    Article  CAS  Google Scholar

  20. Dou X, Zhang Y, Wang H, Wang T, Wang Y (2011) Performance of granular zirconium–iron oxide in the removal of fluoride from drinking water. Water Res 45(12):3571–3578

    CAS  Article  Google Scholar

  21. Dwivedi C, Pathak SK, Kumar M, Tripathi SC, Bajaj PN (2015) Preparation and characterization of potassium nickel hexacyanoferrate-loaded hydrogel beads for the removal of cesium ions. Environ Sci Water Res Technol 1:153–160

    CAS  Article  Google Scholar

  22. Eletta OAA, Ajayi OA, Ogunleye OO, Akpan IC (2016) Adsorption of cyanide from aqueous solution using calcinated egg-shells: Equilibrium and optimisation studies. J Environ Chem Eng 4(1):1367–1375

    CAS  Article  Google Scholar

  23. Eskandarpour A, Onyango MS, Ochieng A, Asai S (2008) Removal of fluoride ions from aqueous solution at low pH using schwertmannite. J Hazard Mater 152(2):571–579

    CAS  Article  Google Scholar

  24. Fan X, Parker DJ, Smith MD (2003) Adsorption kinetics of fluoride on low cost materials. Water Res 37(20):4929–4937

    CAS  Article  Google Scholar

  25. Foo KY, Hameed BH (2010) Insights into the modeling of adsorption isotherm systems. Chem Eng J 156(1):2–10

    CAS  Article  Google Scholar

  26. Ghorai S, Pant KK (2004) Investigations on the column performance of fluoride adsorption by activated alumina in a fixed-bed. Chem Eng J 98(1-2):165–173

    CAS  Article  Google Scholar

  27. Ghorai S, Pant KK (2005) Equilibrium, kinetics and breakthrough studies for adsorption of fluoride on activated alumina. Sep Purif Technol 42(3):265–271

    CAS  Article  Google Scholar

  28. Goldberg S (2005) Equations and Models Describing Adsorption Processes in Soils. In: Equations and models describing adsorption processes in soils. Chemical Processes in Soils, USA

    Google Scholar

  29. Gopal V, Elango KP (2007) Equilibrium, kinetic and thermodynamic studies of adsorption of fluoride onto plaster of Paris. J Hazard Mater 141(1):98–105

    CAS  Article  Google Scholar

  30. Haghseresht F, Lu GQ (1998) Adsorption characteristics of phenolic compounds onto coal-reject-derived adsorbents. Energy Fuel 12(6):1100–1107

    CAS  Article  Google Scholar

  31. Hameed BH, Ahmad AA, Aziz N (2007) Isotherms, kinetics and thermodynamics of acid dye adsorption on activated palm ash. Chem Eng J 133(1-3):195–203

    CAS  Article  Google Scholar

  32. Hameed BH, Mahmoud DK, Ahmad AL (2008) Sorption equilibrium and kinetics of basic dye from aqueous solution using banana stalk waste. J Hazard Mater 158(2-3):499–506

    CAS  Article  Google Scholar

  33. He Y, Zhang L, An X, Wan G, Zhu W, Luo Y (2019) Enhanced fluoride removal from water by rare earth (La and Ce) modified alumina: Adsorption isotherms, kinetics, thermodynamics and mechanism. Sci Total Environ 688:184–198

    CAS  Article  Google Scholar

  34. Ho YS (2006) Review of second-order models for adsorption systems. J Hazard Mater 136:681–689

    CAS  Article  Google Scholar

  35. Hu H, Yang L, Lin Z, Xiang X, Jiang X, Hou L (2018) Preparation and characterization of novel magnetic Fe3O4/chitosan/Al(OH)3 beads and its adsorption for fluoride. Int J Biol Macromol 114:256–262

    CAS  Article  Google Scholar

  36. Huang CJ, Liu JC (1999) Precipitate flotation of fluoride-containing wastewater from a semiconductor manufacturer. Water Res 33(16):3403–3412

    CAS  Article  Google Scholar

  37. Huang YH, Shih YJ, Chang CC (2011) Adsorption of fluoride by waste iron oxide: the effects of solution pH, major coexisting anions, and adsorbent calcination temperature. J Hazard Mater 186(2-3):1355–1359

    CAS  Article  Google Scholar

  38. Hui KS, Chao CYH, Kot SC (2005) Removal of mixed heavy metal ions in wastewater by zeolite 4A and residual products from recycled coal fly ash. J Hazard Mater 127(1-3):89–101

    CAS  Article  Google Scholar

  39. Jagtap S, Yenkie MK, Labhsetwar N, Rayalu S (2012) Fluoride in drinking water and defluoridation of water. Chem Rev 112(4):2454–2466

    CAS  Article  Google Scholar

  40. Javed H, Luong DX, Lee CG, Zhang D, Tour JM, Alvarez PJJ (2018) Efficient removal of bisphenol-A by ultra-high surface area porous activated carbon derived from asphalt. Carbon 140:441–448

    CAS  Article  Google Scholar

  41. Kaseva ME (2006) Optimization of regenerated bone char for fluoride removal in drinking water: a case study in Tanzania. J Water Health 4(1):139–147

    CAS  Article  Google Scholar

  42. Kashi G, Mehree A, Zaeimdar M, Khoshab F, Madaree AM (2015) Removal of fluoride from urban drinking water by egg-shell powder. Bulg Chem Commun 47:187–192

    Google Scholar

  43. Khemthong P, Luadthong C, Nualpaeng W, Changsuwan P, Tongprem P, Viriya-Empikul N, Faungnawakij K (2012) Industrial egg-shell wastes as the heterogeneous catalysts for microwave-assisted biodiesel production. Catal Today 190(1):112–116

    CAS  Article  Google Scholar

  44. Köse TE, K?vanç B (2011) Adsorption of phosphate from aqueous solutions using calcined waste egg-shell. Chem Eng J 178:34–39

    Article  CAS  Google Scholar

  45. Ku Y, Chiou HM (2002) The adsorption of fluoride ion from aqueous solution by activated alumina. Water Air Soil Pollut 133(1-4):349–361

    CAS  Article  Google Scholar

  46. Lee JI, Hong SH, Lee CG, Park SJ (2020) Experimental and model study for fluoride removal by thermally activated sepiolite. Chemosphere 241:125094

    CAS  Article  Google Scholar

  47. Lee JI, Kang JK, Hong SH, Lee CG, Jeong S, Park SJ (2021) Thermally treated Mytilus coruscus shells for fluoride removal and their adsorption mechanism. Chemosphere 263:128328

    CAS  Article  Google Scholar

  48. Leyva-Ramos R, Rivera-Utrilla J, Medellin-Castillo NA, Sanchez-Polo M (2010) Kinetic modeling of fluoride adsorption from aqueous solution onto bone char. Chem Eng J 158(3):458–467

    CAS  Article  Google Scholar

  49. Li YH, Wang S, Zhang X, Wei J, Xu C, Luan Z, Wu D (2003) Adsorption of fluoride from water by aligned carbon nanotubes. Mater Res Bull 38(3):469–476

    CAS  Article  Google Scholar

  50. Li YH, Di Z, Ding J, Wu D, Luan Z, Zhu Y (2005) Adsorption thermodynamic, kinetic and desorption studies of Pb2+ on carbon nanotubes. Water Res 39(4):605–609

    CAS  Article  Google Scholar

  51. Li Y, Zhang P, Du Q, Peng X, Liu T, Wang Z, Xia Y, Zhang W, Wang K, Zhu H, Wu D (2011) Adsorption of fluoride from aqueous solution by graphene. J Colloid Interface Sci 363(1):348–354

    CAS  Article  Google Scholar

  52. Liu Q, Guo H, Shan Y (2010) Adsorption of fluoride on synthetic siderite from aqueous solution. J Fluor Chem 131(5):635–641

    CAS  Article  Google Scholar

  53. Loganathan P, Vigneswaran S, Kandasamy J, Naidu R (2013) Defluoridation of drinking water using adsorption processes. J Hazard Mater 248:1–19

    Article  CAS  Google Scholar

  54. Lunge S, Thakre D, Kamble S, Labhsetwar N, Rayalu S (2012) Alumina supported carbon composite material with exceptionally high defluoridation property from egg-shell waste. J Hazard Mater 237:161–169

    Article  CAS  Google Scholar

  55. Luo F, Inoue K (2004) The removal of fluoride ion by using metal (III)-loaded amberlite resins. Solvent Extr Ion Exc 22(2):305–322

    CAS  Article  Google Scholar

  56. Lv L, He J, Wei M, Evans DG, Duan X (2006) Factors influencing the removal of fluoride from aqueous solution by calcined Mg–Al–CO3 layered double hydroxides. J Hazard Mater 133(1-3):119–128

    CAS  Article  Google Scholar

  57. Ma W, Ya FQ, Han M, Wang R (2007) Characteristics of equilibrium, kinetics studies for adsorption of fluoride on magnetic-chitosan particle. J Hazard Mater 143(1-2):296–302

    CAS  Article  Google Scholar

  58. Medellin-Castillo NA, Leyva-Ramos R, Padilla-Ortega E, Perez RO, Flores-Cano JV, Berber-Mendoza MS (2014) Adsorption capacity of bone char for removing fluoride from water solution. Role of hydroxyapatite content, adsorption mechanism and competing anions. J Ind Eng Chem 20(6):4014–4021

    CAS  Article  Google Scholar

  59. Mittal A, Teotia M, Soni RK, Mittal J (2016) Applications of egg shell and egg shell membrane as adsorbents: a review. J Mol Liq 223:376–387

    CAS  Article  Google Scholar

  60. Mondal P, George S (2015) A review on adsorbents used for defluoridation of drinking water. Rev Environ Sci Biotechnol 14(2):195–210

    CAS  Article  Google Scholar

  61. Moulder JF, Chastain J, King RC Jr (1995) Handbook of X-ray photoelectron spectroscopy: a reference book of standard spectra for identification and interpretation of XPS data (physical electronics). Perkin-Elmer Corporation, USA

    Google Scholar

  62. Mumtaz N, Pandey G, Labhasetwar PK (2015) Global fluoride occurrence, available technologies for fluoride removal and electrolytic defluoridation: a review. Crit Rev Environ Sci Technol 45(21):2357–2389

    CAS  Article  Google Scholar

  63. Ni M, Ratner BD (2008) Differentiating calcium carbonate polymorphs by surface analysis techniques—an XPS and TOF-SIMS study. Surf Interface Anal 40(10):1356–1361

    CAS  Article  Google Scholar

  64. Nigri EM, Bhatnagar A, Rocha SDF (2017) Thermal regeneration process of bone char used in the fluoride removal from aqueous solution. J Clean Prod 142:3558–3570

    CAS  Article  Google Scholar

  65. Oguz E (2005) Adsorption of fluoride on gas concrete materials. J Hazard Mater 117(2-3):227–233

    CAS  Article  Google Scholar

  66. Onyango MS, Kojima Y, Aoyi O, Bernardo EC, Matsuda H (2004) Adsorption equilibrium modeling and solution chemistry dependence of fluoride removal from water by trivalent-cation-exchanged zeolite F-9. J Colloid Interface Sci 279(2):341–350

    CAS  Article  Google Scholar

  67. Park HJ, Jeong SW, Yang JK, Kim BG, Lee SM (2007) Removal of heavy metals using waste egg-shell. J Environ Sci 19(12):1436–1441

    CAS  Article  Google Scholar

  68. Patel S, Han J, Qiu W, Gao W (2015) Synthesis and characterisation of mesoporous bone char obtained by pyrolysis of animal bones, for environmental application. J Environ Chem Eng 3(4):2368–2377

    CAS  Article  Google Scholar

  69. Qiu H, Lv L, Pan BC, Zhang QJ, Zhang WM, Zhang QX (2009) Critical review in adsorption kinetic models. J Zhejiang Univ-SC A 10(5):716–724

    CAS  Article  Google Scholar

  70. Raghav S, Kumar D (2019) Comparative kinetics and thermodynamic studies of fluoride adsorption by two novel synthesized biopolymer composites. Carbohydr Polym 203:430–440

    CAS  Article  Google Scholar

  71. Raji C, Anirudha TS (1997) Chromium (VI) adsorption by sawdust carbon: kinetics and equilibrium. Indian J Chem Techn 3:228–236

    Google Scholar

  72. Ramdani A, Taleb S, Benghalem A, Ghaffour N (2010) Removal of excess fluoride ions from Saharan brackish water by adsorption on natural materials. Desalination 250(1):408–413

    CAS  Article  Google Scholar

  73. Reimann C, Bjorvatn K, Frengstad B, Melaku Z, Tekle-Haimanot R, Siewers U (2003) Drinking water quality in the Ethiopian section of the East African Rift Valley I—data and health aspects. Sci Total Environ 311(1-3):65–80

    CAS  Article  Google Scholar

  74. Rojas-Mayorga CK, Bonilla-Petriciolet A, Aguayo-Villarreal IA, Hernandez-Montoya V, Moreno-Virgen MR, Tovar-Gómez R, Montes-Morán MA (2013) Optimization of pyrolysis conditions and adsorption properties of bone char for fluoride removal from water. J Anal Appl Pyrolysis 104:10–18

    CAS  Article  Google Scholar

  75. Ruiz T, Persin F, Hichour M, Sandeaux J (2003) Modelisation of fluoride removal in Donnan dialysis. J Membr Sci 212(1-2):113–121

    CAS  Article  Google Scholar

  76. Sahli MM, Annouar S, Tahaikt M, Mountadar M, Soufiane A, Elmidaoui A (2007) Fluoride removal for underground brackish water by adsorption on the natural chitosan and by electrodialysis. Desalination 212(1-3):37–45

    Article  CAS  Google Scholar

  77. Santos AF, Arim AL, Lopes DV, Gando-Ferreira LM, Quina MJ (2019) Recovery of phosphate from aqueous solutions using calcined egg-shell as an eco-friendly adsorbent. J Environ Manag 238:451–459

    CAS  Article  Google Scholar

  78. Sepehr MN, Sivasankar V, Zarrabi M, Kumar MS (2013) Surface modification of pumice enhancing its fluoride adsorption capacity: an insight into kinetic and thermodynamic studies. Chem Eng J 228:192–204

    CAS  Article  Google Scholar

  79. Shang Y, Xu X, Gao B, Yue Q (2018) Highly selective and efficient removal of fluoride from aqueous solution by ZrLa dual-metal hydroxide anchored bio-sorbents. J Clean Prod 199:36–46

    CAS  Article  Google Scholar

  80. Simonin JP (2016) On the comparison of pseudo-first order and pseudo-second order rate laws in the modeling of adsorption kinetics. Chem Eng J 300:254–263

    CAS  Article  Google Scholar

  81. Solangi IB, Memon S, Bhanger MI (2009) Removal of fluoride from aqueous environment by modified Amberlite resin. J Hazard Mater 171(1-3):815–819

    CAS  Article  Google Scholar

  82. Swain SK, Patnaik T, Singh VK, Jha U, Patel RK, Dey RK (2011) Kinetics, equilibrium and thermodynamic aspects of removal of fluoride from drinking water using meso-structured zirconium phosphate. Chem Eng J 171(3):1218–1226

    CAS  Article  Google Scholar

  83. Tan IAW, Ahmad AL, Hameed BH (2008) Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies. J Hazard Mater 154(1-3):337–346

    CAS  Article  Google Scholar

  84. Tang Y, Guan X, Su T, Gao N, Wang J (2009) Fluoride adsorption onto activated alumina: modeling the effects of pH and some competing ions. Colloid Surface A 337(1-3):33–38

    CAS  Article  Google Scholar

  85. Tangboriboon N, Kunanuruksapong R, Sirivat A (2012) Preparation and properties of calcium oxide from egg-shells via calcination. Mater Sci-Poland 30(4):313–322

    CAS  Article  Google Scholar

  86. Tsai WT, Yang JM, Lai CW, Cheng YH, Lin CC, Yeh CW (2006) Characterization and adsorption properties of egg-shells and egg-shell membrane. Bioresour Technol 97(3):488–493

    CAS  Article  Google Scholar

  87. Tomar V, Kumar D (2013) A critical study on efficiency of different materials for fluoride removal from aqueous media. Chem Cent J 7(1):51

    Article  CAS  Google Scholar

  88. Tor A (2006) Removal of fluoride from an aqueous solution by using montmorillonite. Desalination 201(1-3):267–276

    CAS  Article  Google Scholar

  89. Turner BD, Binning P, Stipp SLS (2005) Fluoride removal by calcite: evidence for fluorite precipitation and surface adsorption. Environ Sci Technol 39(24):9561–9568

    CAS  Article  Google Scholar

  90. United States Environmental Protection Agency (2010) Basic information about fluoride in drinking water. https://tdb.epa.gov/tdb/contaminant?id=10700. Accessed April 2020

  91. Vijayaraghavan K, Jegan J, Palanivelu K, Velan M (2005) Removal and recovery of copper from aqueous solution by egg-shell in a packed column. Miner Eng 18(5):545–547

    CAS  Article  Google Scholar

  92. Voudrias E, Fytianos K, Bozani E (2002) Sorption–desorption isotherms of dyes from aqueous solutions and wastewaters with different sorbent materials. Global Nest Int J 4(1):75–83

    Google Scholar

  93. Wang L, Di C, Li T, Chun Y, Xu Q (2015) Preparation and catalytic behavior of biomorphic calcium oxide/carbon solid base materials. Catal Sci Technol 5(12):5185–5195

    CAS  Article  Google Scholar

  94. Wang XH, Song RH, Yang HC, Shi YJ, Dang GB, Yang S, Zhao Y, Sun XF, Wang SG (2013) Fluoride adsorption on carboxylated aerobic granules containing Ce (III). Bioresour Technol 127:106–111

    CAS  Article  Google Scholar

  95. Witoon T (2011) Characterization of calcium oxide derived from waste egg-shell and its application as CO2 sorbent. Ceram Int 37(8):3291–3298

    CAS  Article  Google Scholar

  96. World Health Organization (1993) Guidelines for drinking-water quality. WHO, Switzerland

    Google Scholar

  97. Wu X, Zhang Y, Dou X, Yang M (2007) Fluoride removal performance of a novel Fe–Al–Ce trimetal oxide adsorbent. Chemosphere 69(11):1758–1764

    CAS  Article  Google Scholar

  98. Yang C, Gao L, Wang Y, Tian X, Komarneni S (2014) Fluoride removal by ordered and disordered mesoporous aluminas. Microporous Mesoporous Mater 197:156–163

    CAS  Article  Google Scholar

  99. Yang J, Kaewpanha M, Karnjanakom S, Guan G, Hao X, Abudula A (2016) Steam reforming of biomass tar over calcined egg shell supported catalysts for hydrogen production. Int J Hydrogen Energ 41(16):6699–6705

    CAS  Article  Google Scholar

  100. Ye Y, Yang J, Jiang W, Kang J, Hu Y, Ngo HH, Guo W, Liu Y (2018) Fluoride removal from water using a magnesia-pullulan composite in a continuous fixed-bed column. J Environ Manag 206:929–937

    CAS  Article  Google Scholar

Funding

This work was supported by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry through the Animal Disease Management Technology Development Program, funded by the Ministry of Agriculture, Food and Rural Affairs (grant 118095-2).

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