Preparation of Calcium Silicate Hydrate Extrudates and Their Phosphate Adsorption Studies

Phani Brahma Somayajulu Rallapalli; Jeong Hyub Ha

Applied Chemistry for Engineering, Vol.30, No.5, 562-568, October, 2019

DOI10.14478/ace.2019.1059 Export Citation

Preparation of Calcium Silicate Hydrate Extrudates and Their Phosphate Adsorption Studies

Phani Brahma Somayajulu Rallapalli, and Jeong Hyub Ha^†

Department of Integrated Environmental Systems, Pyeongtaek University, Pyeongtaek 17869, Korea

E-mail:

Cylindrical shape extrudates of calcium silicate hydrate (CSH) were prepared using different percentages of polyvinyl alcohol (PVA) / sodium alginate (SA) mixtures as binders and an aqueous solution containing 6% H3BO3 and 3% CaCl2 was used as a cross linking agent. As the quantity of alginate increases, the phosphate removal efficiency and capacity were decreased. Among four different extrudate samples, the sample prepared by 8% PVA + 2% SA showed the highest phosphate removal efficiency (59.59%) and capacity (29.97 mg/g) at an initial phosphate concentration of 100 ppm and 2.0 g/L adsorbent dosage. Effects of the adsorbent dosage, contact time and initial phosphate concentration on the sample were further studied. The removal efficiency and capacity obtained by a 4.0 g/L adsorbent dose at an initial phosphate concentration of 100 ppm in 3 h were 79.38% and 19.96 mg/g, respectively. The experimental data of kinetic and isotherm measurements followed the pseudo-second-order kinetic equation and Langmuir isotherm model, respectively. These results suggested that the phosphate removal was processed via a chemisorption and a monolayer coverage of phosphate anions was on the CSH surface. The maximum adsorption capacity (qmax) was calculated as 23.87 mg/g from Langmuir isotherm model.

Keywords:Calcium silicate hydrate;Phosphate removal;Extrusion;Chemical cross linking;Chemisorption

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[4] Ravindra KG, Sushmita B, Pavan KG, Chattopadhyaya MC, Nova Science Publishers, Inc., 36, 177 (2014)

[5] Joshua TB, Edmond N, Irina DO, Andrew M, David WG, Front. Environ. Sci., 6, 1 (2018)

[6] Oehmen A, Lemos PC, Carvalho G, Yuan Z, Keller J, Blackall LL, Reis MAM, Water Res., 41, 2271 (2007)

[7] De-Bashan LE, Bashan Y, Water Res., 38, 4222 (2004)

[8] Okano K, Uemoto M, Kagami J, Miura K, Aketo T, Toda M, Water Res., 47, 2251 (2013)

[9] Loganathan P, Saravanamuthu V, Kandasamy J, Nanthi SB, Crit. Rev. Environ. Sci. Technol., 44, 847 (2014)

[10] Chitrakar R, Tezuka S, Sonoda A, Sakane K, Ooi K, Hirotsu T, J. Colloid Interface Sci., 297(2), 426 (2006)

[11] Zhang GS, Liu HJ, Liu RP, Qu JH, J. Colloid Interface Sci., 335(2), 168 (2009)

[12] Karaca S, Gurses A, Ejder M, Acikyildiz M, J. Hazard. Mater., B128, 273 (2006)

[13] Ashekuzzaman SM, Jiang JQ, Chem. Eng. J., 246, 97 (2014)

[14] Edzwald JK, Toensing DC, Leung MCY, Environ. Sci. Technol., 10, 485 (1976)

[15] Cui XQ, Dai X, Khan KY, Li TQ, Yang XE, He ZL, Bioresour. Technol., 218, 1123 (2016)

[16] Yin Q, Wang R, Zhao Z, J. Clean Prod., 176, 230 (2018)

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[18] Ou E, Zhou J, Mao S, Wang J, Xia F, Min L, Colloids Surf. A: Physicochem. Eng. Asp., 308, 47 (2007)

[19] Chen X, Kong H, Wu D, Wang X, Lin Y, J. Environ. Sci., 21, 575 (2009)

[20] Southam DC, Lewis TW, McFarlane AJ, Johnston JH, Curr. Appl. Phys., 4(2-4), 355 (2004)

[21] Okano K, Miyamaru S, Kitao A, Takano H, Aketo T, Toda M, Honda K, Ohtake H, Sep. Purif. Technol., 144, 63 (2015)

[22] Abd El-Latif MM, El-Kady MF, Amal MI, Mona EO, J. Am. Sci., 6(5), 280 (2010)

[23] Cheng S, Yaqian Z, Ranbin L, Yi M, David M, Water Sci. Technol., 78(9), 1980 (2018)

[24] Shilin D, Dexin F, Zishan P, Bin L, Li K, Han W, Qian Z, Qiushi S, Fangying J, Sci. Total Environ., 645, 937 (2018)

[25] Farid A, Linnea A, Steven O, Niklas H, Lennart B, J. Eur. Ceram. Soc., 34, 1643 (2014)

[26] Jinxing W, Jidong L, Li S, Sha G, Chemosphere, 219, 130 (2019)

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[30] Ragheb SM, Housing and Building National Research Center Journal (HBRC J.), 9, 270-275 (2013).

[31] Moussout H, Ahlafi H, Aazza M, Maghat H, Karbala Int. J. Mod. Sci., 4(2), 244 (2018)

[32] Dariush R, J. Nanostruct. Chem., 3, 55 (2013)

[33] Salman N, Vijay B, Jiri M, Jakub W, Promoda B, Azeem A, Fibers Polym., 17, 1245 (2016)

[34] Das J, Patra BS, Baliarsingh N, Parida KM, Appl. Clay Sci., 32, 252 (2006)

[35] Radheshyam RP, Prabuddha G, Lalhmunsiama B, Hari CB, Lee SM, Sci. Total Environ., 572, 1222 (2016)