Magnetic activated carbon (MAC) was prepared by co-precipitation. These particles had attractive adsorption capacity and could be easily separated from aqueous. MAC was used as adsorbent to remove p-chlorophenol (p- CP) and p-nitrophenol (p-NP) from solution in single and binary systems. In a single system, the equilibrium time was 60 min, the best initial pH was 3-8 and 3-6 for p-CP or p-NP adsorption, respectively. The existence of salt ions had little influence on the adsorption process, while surfactant had negative influence. The adsorption quantity from experiments was up to 97.3mg·g-1 for p-CP and 116mg·g-1 for p-NP at 293 K, respectively. Freundlich model and pseudosecond- order kinetic model fitted well the adsorption behavior. Thermodynamic parameters were calculated and the results showed that the process was spontaneous, exothermic and entropy production in nature. In addition, p-CP or p- NP-loaded MAC could be well reused by 0.01 mol·L-1 sodium hydroxide solution as regeneration agent. Kinetic process of desorption was fitted best by pseudo-second-order kinetic model. Results from the binary system showed that competitive adsorption existed during the process, and p-NP adsorption on MAC was easier than p-CP. Freundlich model well fitted the adsorption behavior in the binary system. Hydrogen-bonding, electron donor-acceptor and π-π interactions may be the main mechanisms of adsorption. MAC proved to be an excellent adsorbent for the removal of p-CP and p-NP from solution.

Magnetic Activated Carbon p-Chlorophenol p-Nitrophenol Competitive Adsorption Desorption

Anbia M, Khoshbooei S, J. Nanostruct. Chem., 5, 139 (2015)
Koubaissy B, Toufaily J, El-murr M, Hamieh T, Magnoux P, Joly G, Phys. Procedia, 21, 220 (2011)
Rad LR, Haririan I, Divsar F, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 136, 423 (2015)
Acosta CA, Pasquali C, Paniagua G, Garcinuno RM, Hernando PF, Environ. Pollut., 236, 265 (2018)
Borras C, Laredo T, Scharifker BR, Electrochim. Acta, 48(19), 2775 (2003)
Ozaki H, Li H, Water Res., 36, 123 (2002)
Li Y, Loh KC, J. Appl. Polym. Sci., 105, 1732 (2010)
Lin SH, Wang CS, J. Hazard. Mater., 90(2), 205 (2002)
Chu S, Zheng XM, Kong F, Wu GH, Luo LL, Guo Y, Liu HL, Wang Y, Yu HX, Zou ZG, Mater. Chem. Phys., 129(3), 1184 (2011)
Wu J, Yu HQ, J. Hazard. Mater., 137(1), 498 (2006)
Su J, Lin HF, Wang QP, Xie ZM, Chen ZL, Desalination, 269(1-3), 163 (2011)
Salman M, Athar M, Farooq U, Rev. Environ. Sci. Bio., 14, 211 (2015)
Wang JL, Chen C, Biotechnol. Adv., 17, 195 (2009)
Bhatnagar A, Hogland W, Marques M, Sillanpaa M, Chem. Eng. J., 219, 499 (2013)
Canizares P, Carmona M, Baraza O, Delgado A, Rodrigo MA, J. Hazard. Mater., 131(1-3), 243 (2006)
Yang N, Zhu SM, Zhang D, Xu S, Mater. Lett., 62, 645 (2008)
Singh S, Res. J. Chem. Sci., 6, 361 (2015)
Han S, Zhao F, Sun J, Wang B, Wei RY, Yan SQ, J. Magn. Magn. Mater., 341, 133 (2013)
Rong YC, Li H, Xiao LH, Wang Q, Hu YY, Zhang SS, Han RP, Desalin. Water. Treat., 106, 273 (2018)
Kakavandi B, Jahangiri-rad M, Rafiee M, Esfahani AR, Babaei AA, Microporous Mesoporous Mater., 231, 192 (2016)
Lassalle VL, Zysler RD, Ferreira ML, Mater. Chem. Phys., 130(1-2), 624 (2011)
Oliveira LCA, Rios R, Fabris JD, Garg V, Sapag K, Lago RM, Carbon, 40, 2177 (2002)
Toth A, Torocsik A, Tombacz E, Laszlo K, J. Colloid Interface Sci., 387, 244 (2012)
Wei QM, Nakato T, Microporous Mesoporous Mater., 96, 84 (2006)
Mohamed EF, Andriantsiferana C, Wilhelm AM, Delmas H, Environ. Technol., 32, 1325 (2011)
Jiao YB, Han DL, Lu YZ, Rong YC, Fang LY, Liu YL, Han RP, Desalin. Water. Treat., 77, 247 (2017)
Zhou T, Fang LY, Wang XW, Han MY, Zhang SS, Han RP, Desalin. Water Treat., 70, 294 (2017)
Battisha IK, Afify HH, Ibrahim M, J. Magn. Magn. Mater., 306, 211 (2006)
Song JY, Zou WH, Bian YY, Su FY, Han RP, Desalination, 265(1-3), 119 (2011)
Zhang RD, Zhang JH, Zhang XN, Dou CC, Han RP, J. Taiwan Inst. Chem. E., 45, 2578 (2014)
Li N, Chen J, Shi YP, Anal. Chim. Acta, 949, 23 (2017)
Mihoc G, Ianos R, Pacurariu C, Water Sci. Technol., 69, 385 (2014)
Zhang B, Li F, Wu T, Sun DJ, Li YJ, Colloids Surf. A: Physicochem. Eng. Asp., 464, 78 (2015)
Srivastava SK, Tyagi R, Water Res., 29, 483 (1995)
Zhang F, Wei Z, Zhang WN, Cui HY, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 182, 116 (2017)
Ho YS, McKay G, Process Biochem., 34(5), 451 (1999)
Cheung CW, Porter JF, McKay G, Sep. Purif. Technol., 19(1-2), 55 (2000)
Hameed BH, Rahman AA, J. Hazard. Mater., 160(2-3), 576 (2008)
Ofomaja AE, Unuabonah EI, Carbohydr. Polym., 83, 1192 (2011)
Vasu AE, E-J. Chem., 5, 224 (2012)
Bello IA, Oladipo MA, Giwa AA, Adeoye DO, Int. J. Basic Appl. Sci., 2, 79 (2013)
Li JM, Meng XG, Hu CW, Du J, Bioresour. Technol., 100(3), 1168 (2009)
Arafat HA, Franz M, Pinto NG, Langmuir, 15(18), 5997 (1999)
Yang K, Jing Q, Wu W, Zhu L, Xing B, Environ. Sci. Technol., 44, 681 (2010)
Ahmaruzzaman M, Sharma DK, J. Colloid Interface Sci., 287(1), 14 (2005)
Halhouli KA, Darwish NA, Al-Jahmany YY, Sep. Sci. Technol., 32(18), 3027 (1997)
Crini G, Dyes Pigment., 77, 145 (2008)
Han RP, Wang YF, Han P, Shi J, Yang J, Lu YS, J. Hazard. Mater., 137(1), 550 (2006)
Chabani M, Amrane A, Bensmaili A, Chem. Eng. J., 125(2), 111 (2006)
Anirudhan TS, Ramachandran M, J. Water Process Eng., 1, 46 (2014)
Chang CY, Tsai WT, Ing CH, Chang CF, J. Colloid Interface Sci., 260(2), 273 (2003)
Fan Y, Yang R, Lei Z, Liu N, Lv J, Zhai S, Zhai B, Wang L, Korean J. Chem. Eng., 33(4), 1416 (2016)
Zhou T, Lu WZ, Liu LF, Zhu HM, Jiao YB, Zhang SS, Han RP, J. Mol. Liq., 211, 909 (2015)
Nguyen ML, Juang RS, Biotechnol. Bioproc. E., 20, 614 (2015)
Chern JM, Chien YW, Water Res., 37, 2347 (2003)
Ha SR, Vinitnantharat S, Environ. Technol., 21, 387 (2000)