References

1. A.Y. Li, H. Deng, Y.H. Jiang, C.H. Ye, B.G. Yu, X.L. Zhou, A.Y. Ma, Superefficient removal of heavy metals from wastewater by Mg-loaded biochars: adsorption characteristics and removal mechanisms, Langmuir, 36 (2020) 9160–9174.
2. M.H. Dehghani, M. Sarmadi, M.R. Alipour, D. Sanaei, H. Abdolmaleki, S. Agarwal, V.K. Gupta, Investigating the equilibrium and adsorption kinetics for the removal of Ni(II) ions from aqueous solutions using adsorbents prepared from the modified waste newspapers: a low-cost and available adsorbent, Microchem. J., 146 (2019) 1043–1053.
3. A. Ma, A. Abushaikha, S.J. Allen, G. McKay, Ion exchange homogeneous surface diffusion modelling by binary site resin for the removal of nickel ions from wastewater in fixed beds, Chem. Eng. J., 358 (2019) 1–10.
4. W. Yin, C. Zhao, J. Xu, J. Zhang, Z. Guo, Y. Shao, Removal of Cd(II) and Ni(II) from aqueous solutions using activated carbon developed from powder-hydrolyzed-feathers and Trapa natans husks, Colloids Surf., A, 560 (2019) 426–433.
5. J. Štefelová, T. Zelenka, V. Slovák, Biosorption (removing) of Cd(II), Cu(II) and methylene blue using biochar produced by different pyrolysis conditions of beech and spruce sawdust, Wood Sci. Technol., 51 (2017) 1321–1338.
6. A. Muhmood, J. Lu, R. Kadam, R. Dong, J. Guo, S. Wu, Biochar seeding promotes struvite formation, but accelerates heavy metal accumulation, Sci. Total Environ., 652 (2019) 623–632.
7. A. Ngigi, Y.S. Ok, S. Thiele-Bruhn, Biochar-mediated sorption of antibiotics in pig manure, J. Hazard. Mater., 364 (2019) 663–670.
8. S.-Y. Oh, Y.-D. Seo, K.-S. Ryu, Reductive removal of 2,4-dinitrotoluene and 2,4-dichlorophenol with zero-valent iron-included biochar, Bioresour. Technol., 216 (2016) 1014–1021.
9. C. Fan, C. Guo, Y. Zeng, Z. Tu, Y. Ji, J.R. Reinfelder, M. Chen, W. Huang, G. Lu, X. Yi, The behavior of chromium and arsenic associated with redox transformation of schwertmannite in AMD environment, Chemosphere, 222 (2019) 945–953.
10. J. Zhu, M. Gan, D. Zhang, Y. Hu, L. Chai, The nature of Schwertmannite and jarosite mediated by two strains of Acidithiobacillus ferrooxidans with different ferrous oxidation ability, Mater. Sci. Eng., C, 33 (2013) 2679–2685.
11. J.M. Bigham, U. Schwertmann, S.J. Traina, R.L. Winland, M. Wolf, Schwertmannite and the chemical modeling of iron in acid sulfate waters, Geochim. Cosmochim. Acta, 60 (1996) 2111–2121.
12. S. Regenspurg, A. Brand, S. Peiffer, Formation and stability of schwertmannite in acidic mining lakes, Geochim. Cosmochim. Acta, 68 (2004) 1185–1197.
13. X. Meng, C. Zhang, J. Zhuang, G. Zheng, L. Zhou, Assessment of schwertmannite, jarosite and goethite as adsorbents for efficient adsorption of phenanthrene in water and the regeneration of spent adsorbents by heterogeneous Fenton-like reaction, Chemosphere, 244 (2020) 125523,
    doi: 10.1016/j.chemosphere.2019.125523.
14. K. Rout, M. Mohapatra, S. Anand, 2-Line ferrihydrite: synthesis, characterization and its adsorption behaviour for removal of Pb(II), Cd(II), Cu(II) and Zn(II) from aqueous solutions, Dalton Trans., 41 (2012) 3302–3312.
15. Y. Mamindy-Pajany, C. Hurel, N. Marmier, M. Roméo, Arsenic adsorption onto hematite and goethite, C.R. Chim., 12 (2009) 876–881.
16. L.-Y. Gao, J.-H. Deng, G.-F. Huang, K. Li, K.-Z. Cai, Y. Liu, F. Huang, Relative distribution of Cd²⁺ adsorption mechanisms on biochars derived from rice straw and sewage sludge, Bioresour. Technol., 272 (2019) 114–122.
17. M.F. Hamza, Y. Wei, H. Mira, A.-H. Adel, E. Guibal, Synthesis and adsorption characteristics of grafted hydrazinyl amine magnetite-chitosan for Ni(II) and Pb(II) recovery, Chem. Eng. J., 362 (2019) 310–324.
18. J. Jönsson, P. Persson, S. Sjöberg, L. Lövgren, Schwertmannite precipitated from acid mine drainage: phase transformation, sulphate release and surface properties, Appl. Geochem., 20 (2005) 179–191.
19. M. Loan, W. Richmond, G. Parkinson, On the crystal growth of nanoscale schwertmannite, J. Cryst. Growth, 275 (2005) e1875–e1881.
20. Y. Feng, Q. Liu, Y. Yu, Q. Kong, L.-l. Zhou, Y.-d. Du, X.-f. Wang, Norfloxacin removal from aqueous solution using biochar derived from luffa sponge, J. Water Supply Res. Technol. AQUA, 67 (2018) 703–714.
21. S. Tresintsi, K. Simeonidis, G. Vourlias, G. Stavropoulos, M. Mitrakas, Kilogram-scale synthesis of iron oxy-hydroxides with improved arsenic removal capacity: study of Fe(II) oxidation—precipitation parameters, Water Res., 46 (2012) 5255–5267.
22. L. Albanese, S. Baronti, F. Liguori, F. Meneguzzo, P. Barbaro, F.P. Vaccari, Hydrodynamic cavitation as an energy efficient process to increase biochar surface area and porosity: a case study, J. Cleaner Prod., 210 (2019) 159–169.
23. M. Mansouri, M. Nademi, M. Ebrahim Olya, H. Lotfi, Study of methyl tert-butyl ether (MTBE) photocatalytic degradation with UV/TiO₂-ZnO-CuO nanoparticles, J. Chem. Health Risks, 7 (2017) 19–32.
24. G. Marbán, BET adsorption reaction model based on the pseudo steady-state hypothesis for describing the kinetics of adsorption in liquid phase, J. Colloid Interface Sci., 467 (2016) 170–179.
25. G. Meng, A. Li, W. Yang, F. Liu, X. Yang, Q. Zhang, Mechanism of oxidative reaction in the post crosslinking of hyper-crosslinked polymers, Eur. Polym. J., 43 (2007) 2732–2737.
26. M.K. Aroua, S. Leong, L. Teo, C.Y. Yin, W.M.A.W. Daud, Realtime determination of kinetics of adsorption of lead(II) onto palm shell-based activated carbon using ion selective electrode, Bioresour. Technol., 99 (2008) 5786–5792.
27. P. Chingombe, B. Saha, R. Wakeman, Sorption of atrazine on conventional and surface modified activated carbons, J. Colloid Interface Sci., 302 (2006) 408–416.
28. A.W. Marczewski, Analysis of kinetic Langmuir model. Part I: integrated kinetic Langmuir equation (IKL): a new complete analytical solution of the Langmuir rate equation, Langmuir, 26 (2010) 15229–15238.
29. H. Qiu, M.G. Vijver, E. He, W.J. Peijnenburg, Predicting copper toxicity to different earthworm species using a multicomponent Freundlich model, Environ. Sci. Technol., 47 (2013) 4796–4803.
30. X.Q. Meng, C.M. Zhang, J. Zhuang, G.Y. Zheng, L.X. Zhou, Assessment of schwertmannite, jarosite and goethite as adsorbents for efficient adsorption of phenanthrene in water and the regeneration of spent adsorbents by heterogeneous Fenton-like reaction, Chemosphere, 244 (2020) 125523, doi: 10.1016/j.chemosphere.2019.125523.
31. J. Yu, J. Zhang, S. Song, H. Liu, Z. Guo, C. Zhang, Removal of Ni(II) from aqueous solutions using activated carbon with manganese formate hydrate in-situ modification, Colloids Surf., A, 560 (2019) 84–91.
32. Y. Kang, Z. Guo, J. Zhang, H. Xie, H. Liu, C. Zhang, Enhancement of Ni(II) removal by urea-modified activated carbon derived from Pennisetum alopecuroides with phosphoric acid activation, J. Taiwan Inst. Chem. Eng., 60 (2016) 335–341.
33. Y. Liu, S.P. Sohi, S. Liu, J. Guan, J. Zhou, J. Chen, Adsorption and reductive degradation of Cr(VI) and TCE by a simply synthesized zero valent iron magnetic biochar, J. Environ. Manage., 235 (2019) 276–281.
34. M. Li, H. Liu, T. Chen, C. Dong, Y. Sun, Synthesis of magnetic biochar composites for enhanced uranium(VI) adsorption, Sci. Total Environ., 651 (2019) 1020–1028.