References

1. Z.H. Pang, S.P. Huang, S.B. Hu, P. Zhao, L. He, Geothermal studies in China: progress and prospects 1995–2014, Chin. J. Geol., 49 (2014) 719–727.
2. L. Zhang, S. Chen, C. Zhang, Geothermal power generation in China: status and prospects, Energy Sci. Eng., 7 (2019) 1428–1450.
3. Q.H. Guo, Hydrogeochemistry of high-temperature geothermal systems in China: a review, Appl. Geochem., 27 (2012) 1887–1898.
4. Q. Zhang, H. Tan, T. Qu, W. Zhang, Y. Zhang, N. Kong, Impacts of typical harmful elements in geothermal water on river water quality in Tibet, J. Water Resour. Prot., 30 (2014) 23–29.
5. T. Tuutijärvi, J. Lu, M. Sillanpää, G. Chen, As(V) adsorption on maghemite nanoparticles, J. Hazard. Mater., 166 (2009) 1415–1420.
6. A. Bhatnagar, E. Kumar, M. Sillanpää, Fluoride removal from water by adsorption—a review, Chem. Eng. J., 171 (2011) 811–840.
7. R.T. Rao, N.T. Manjunath, Removal of fluoride from aqueous solutions by precipitation, Eng. Techol, 4 (2013) 40–42.
8. M. Cledon, R. Galvez, J.R. Vega-Baudrit, Using vegetal biomass for pollution adsorption. Integrated and sustainable environmental remediation, Am. Chem. Soc., 1302 (2018) 1–13.
9. M. Hassan, R. Naidu, J.H. Du, Y.J. Liu, F.J. Qi, Critical review of magnetic biosorbents: their preparation, application, and regeneration for wastewater treatment, Sci. Total Environ., 702 (2020) 134893.
10. D. Kołodyńska, R. Wnętrzak, J.J. Leahy, M.H.B. Hayes, W. Kwapiński, Z. Hubicki, Kinetic and adsorptive characterization of biochar in metal ions removal, Chem. Eng. J., 197 (2012) 295–305.
11. J. Lehmann, J. Gaunt, M. Rondon, Bio-char sequestration in terrestrial ecosystems – a review, Nat. Commun., 11 (2006) 403–427.
12. D. Woolf, J.E. Amonette, F.A. Street-Perrott, J. Lehmann, S. Joseph, Sustainable biochar to mitigate global climate change, Nat. Commun., 1 (2010) 56.
13. J.S. Clemente, S. Beauchemin, T. MacKinnon, J. Martin, C.T. Johnston, B. Joern, Initial biochar properties related to the removal of As, Se, Pb, Cd, Cu, Ni, and Zn from an acidic suspension, Chemosphere, 170 (2017) 216–224.
14. J.C. Tang, W.Y. Zhu, R. Kookana, A. Katayama, Characteristics of biochar and its application in remediation of contaminated soil, J. Biosci. Bioeng., 116 (2013) 653–659.
15. D. Yang, L. Wang, Z.T. Li, X.J. Tang, M.J. He, S.Y. Yang, X.M. Liu, J.M. Xu, Simultaneous adsorption of Cd(II) and As(III) by a novel biochar-supported nanoscale zero-valent iron in aqueous systems, Sci. Total Environ., 708 (2020) 134823.
16. C.A. Takaya, L.A. Fletcher, S. Singh, U.C. Okwuosa, A.B. Ross, Recovery of phosphate with chemically modified biochars, J. Environ. Chem. Eng., 4 (2016) 1156–1165.
17. F. Zhang, X. Wang, J. Xionghui, L.J. Ma, Efficient arsenate removal by magnetite-modified water hyacinth biochar, Environ. Pollut., 216 (2016) 575–583.
18. J.W. Kim, J.Y. Song, S.-M. Lee, J.H. Jung, Application of ironmodified biochar for arsenite removal and toxicity reduction, J. Ind. Eng. Chem., 80 (2019) 17–22.
19. G. Wendimu, F. Zewge, E. Mulugeta, Aluminium-iron-amended activated bamboo charcoal (AIAABC) for fluoride removal from aqueous solutions, J. Water Process Eng., 16 (2017) 123–131.
20. C.H. Luo, J. Tian, P.L. Zhu, Z. Bin, D. Bu, X.B. Lu, Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent, R. Soc. Open Sci., 5 (2018), https://doi.org/10.1098/rsos.181266.
21. Z.H. Wang, H.Y. Guo, F. Shen, D.Q. Duan, Production of biochar by vermicompost carbonization and its adsorption to Rhodamine-B, Acta Sci. Circumstant., 35 (2015) 3170–3177.
22. Y.Y. Du, X. Wang, W.C. Xie, Y. Xiao, X. Wang, X.Y. He, Effects of Fe-impregnated biochar on arsenic immobilization in realgar mine tailings, Res. Environ. Sci., 30 (2017) 159–165.
23. Q.H. Guo, Y.X. Wang, W. Liu, Major hydrogeochemical processes in the two reservoirs of the Yangbajing geothermal field, Tibet, China, J. Volcanol. Geotherm. Res., 166 (2007) 255–268.
24. F.Z. Khelaifia, S. Hazourli, S. Nouacer, H. Rahima, M. Ziati, Valorization of raw biomaterial waste-date stones-for Cr(VI) adsorption in aqueous solution: thermodynamics, kinetics and regeneration studies, Int. Biodeterior. Biodegrad., 114 (2016) 76–86.
25. M. de Godoi Pereira, M. Korn, B.B. Santos, M.G. Ramos, Vermicompost for tinted organic cationic dyes retention, Water Air Soil Pollut., 200 (2009) 227–235.
26. J. Meng, X.L. Feng, Z.M. Dai, X.M. Liu, J.J. Wu, J.M. Xu, Adsorption characteristics of Cu(II) from aqueous solution onto biochar derived from swine manure, Environ. Sci. Pollut. Res., 21 (2014) 7035–7046.
27. S.-Y. Yoon, C.-G. Lee, J.-A. Park, J.-H. Kim, S.-B. Kim, S.-H. Lee, J.-W. Choi, Kinetic, equilibrium and thermodynamic studies for phosphate adsorption to magnetic iron oxide nanoparticles, Chem. Eng. J., 236 (2014) 341–347.