화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.37, 107-114, May, 2016
DOI10.1016/j.jiec.2016.03.013  Export Citation
A novel surfactant, N,N-diethyl-N'-cyclohexylthiourea:Synthesis, flotation and adsorption on chalcopyrite
Zhiling He, Guangyi Liu†, Xianglin Yang, and Wei Liu
  • College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
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In this paper, a novel surfactant, N,N-diethyl-N'-cyclohexylthiourea (DECHTU) was synthesized and first introduced as a collector for chalcopyrite flotation. The micro-flotation results demonstrated chalcopyrite with adsorbed DECHTU exhibited good hydrophobicity and was effectively concentrated by nitrogen bubbles under pH 4-8. The adsorption of DECHTU onto chalcopyrite surfaces was fitted well by the pseudo-second-order model and Langmuir isotherm, and was a spontaneously exothermic chemisorption process. The adsorption enthalpy change, entropy change and free energy change were ΔH = -31.10 kJ mol-1, ΔS = -6.32 J mol-1 and ΔG (298 K) = -29.41 kJ mol-1, respectively. The activa-tion energy of the adsorption process was 17.39 kJ mol-1. The zeta potential results implied that DECHTU adsorbed onto chalcopyrite surfaces as its anionic species with the release of H+ ion of NH-C(=S)-N group into aqueous solutions. The XPS spectra confirmed that there existed Cu(I)-DECHTU surface complexes on chalcopyrite surface by bonding of copper atom with the sulfur atom of DECHTU, accompanying with the reduction of cupric to cuprous.
Keywords:N,N-Diethyl-N'-cyclohexylthiourea;Chalcopyrite;Thermodynamics;Kinetics;Adsorption
  1. Huang ZG, Zhong H, Wang S, Xia LY, Zou WB, Liu GY, Chem. Eng. J., 257, 218 (2014)
  2. Ma X, Hu Y, Zhong H, Wang S, Liu GY, Zhao G, Appl. Surf. Sci., 365, 342 (2016)
  3. Deng L, Zhao G, Zhong H, Wang S, Liu G, J. Ind. Eng. Chem., 33, 131 (2016)
  4. Zhao Y, Li YP, Huang J, Liu J, Wang WK, Sep. Purif. Technol., 144, 123 (2015)
  5. Li Y, Yang L, Zhu T, Yang J, Ruan X, J. Surfactants. Deterg., 16, 409 (2013)
  6. Shen H, Pugh RJ, Forssberg E, Colloids Surf. A: Physicochem. Eng. Asp., 196, 63 (2002)
  7. Yang L, Zhao Y, Yang J, Li Y, Meng Q, Water Sci. Technol., 70, 627 (2014)
  8. Hu CY, Lo SL, Li CM, Kuan WH, J. Hazard. Mater., 120(1-3), 15 (2005)
  9. Yuan X, Meng Y, Zeng G, Fang Y, Shi J, Colloids Surf. A: Physicochem. Eng. Asp., 317, 256 (2008)
  10. Polat H, Erdogan D, J. Hazard. Mater., 148(1-2), 267 (2007)
  11. Cui Z, Li YP, Ge Y, Fan LS, Chem. Eng. Sci., 60(22), 5971 (2005)
  12. Li Y, Zhu T, Liu Y, Tian Y, Wang H, Water Sci. Technol., 65, 1060 (2012)
  13. Liu GY, Zhong H, Xia LY, Wang SA, Xu ZH, Miner. Eng., 24(8), 817 (2011)
  14. Fairthorne G, Fornasiero D, Ralston J, Int. J. Miner. Process., 50(4), 227 (1997)
  15. Boyd SE, Healy PC, Hope GA, Woods R, Z. Anorg. Allg. Chem., 9, 1537 (2008)
  16. Nagaraj DR, Lewellyn ME, Wang S, in: Proceedings of the XVIth International Mineral Processing Congress, Stockholm, Elsevier, Amsterdam, 1988, p. 1221.
  17. Fairthorne G, Fornasiero D, Ralston J, Anal. Chim. Acta, 346, 237 (1997)
  18. Hope GA, Woods R, Boyd SE, Watling K, Colloids Surf. A: Physicochem. Eng. Asp., 232, 129 (2004)
  19. Fuerstenau DW, Herrera-Urbina R, McGlashan DW, Int. J. Miner. Process., 58(1), 15 (2000)
  20. Liu GY, Qiu ZH, Wang JY, Liu QX, Xiao JJ, Zeng HB, Zhong H, Xu ZH, J. Colloid Interface Sci., 437, 42 (2015)
  21. Liu G, Ren H, Zhan J, Xiao J, Zhong H, Res. Chem. Intermed., 40, 2025 (2014)
  22. Liu G, Zhong H, Xia L, Wang S, Dai T, Trans. Nonferrous Met. Soc. China, 20, 695 (2010)
  23. Liu G, Xiao J, Ren H, Zhong H, J. Ind. Eng. Chem., 21, 1306 (2015)
  24. Vidyadhar A, Rao KH, Forssberg KSE, J. Colloid Interface Sci., 248(1), 19 (2002)
  25. Guler T, J. Colloid Interface Sci., 288(2), 319 (2005)
  26. Nagaraj DR, Brinen JS, Int. J. Miner. Process., 63(1), 45 (2001)
  27. Hope GA, Buckley FM, Munce CG, Woods R, Miner. Eng., 20(10), 964 (2007)
  28. Vidyadhar A, Rao KH, J. Colloid Interface Sci., 306(2), 195 (2007)
  29. Wang J, Liu Q, Zeng H, J. Phys. Chem. C, 117, 20089 (2013)
  30. Gupta VK, Gupta M, Sharma S, Water Res., 35, 1125 (2001)
  31. Langmuir I, J. Am. Chem. Soc., 40, 1361 (1918)
  32. Freundlich HMF, J. Phys. Chem., 57, 385 (1906)
  33. Haghseresht F, Lu GQ, Energy Fuels, 12(6), 1100 (1998)
  34. Ozcan AS, Erdem B, Ozcan A, J. Colloid Interface Sci., 280(1), 44 (2004)
  35. Gupta VK, Mittal A, Gajbe V, Mittal J, J. Colloid Interface Sci., 319(1), 30 (2008)
  36. Unlu N, Ersoz M, Sep. Purif. Technol., 52(3), 461 (2007)
  37. Ho YS, McKay G, Process Saf. Environ. Protect., 76(4), 332 (1998)
  38. Ho YS, McKay G, Water Res., 34, 735 (2000)
  39. Jaycock MJ, Parfitt GD, Chemistry of Interfaces, Ellis Horwood Limited, New York, 1981.
  40. Aksu Z, Process Biochem., 38(1), 89 (2002)
  41. Mitchell KT, Nguyen AV, Evans GM, Adv. Colloid Interface Sci., 114-115, 227 (2005)
  42. Han KN, Healy TW, Fuerstenau DW, J. Colloid Interface Sci., 44, 407 (1973)
  43. Yoshida T, Yamasaki K, Sawada S, Bull. Chem. Soc. Jpn., 10, 2908 (1979)
  44. Yoshida T, Bull. Chem. Soc. Jpn., 53, 1449 (1980)
  45. Harmer SL, Thomas JE, Fornasiero D, Gerson AR, Geochim. Cosmochim. Acta, 70, 4392 (2006)