1. F.N. Kemmer, The NALCO Water Handbook, 2nd ed., Nalco Chemical Company, McGraw-Hill Book Company, New York, NY, 1988.
  2. G. Martine, State of World Population 2007: Unleashing the Potential of Urban Growth, New York, NY, 2007.
  3. S.Y. Choy, K.M.N. Prasad, T.Y. Wu, M.E. Raghunandan, R.N. Ramanan, Utilization of plant-based natural coagulants as future alternatives towards sustainable water clarification, J. Environ. Sci., 26 (2014) 2178–2189.
  4. M.A. Aboulhassan, S. Souabi, A. Yaacoubi, M. Baudu, Improvement of paint effluents coagulation using natural and synthetic coagulant aids, J. Hazard. Mater., 138 (2006) 40–45.
  5. G. Muthuraman, S. Sasikala, Removal of turbidity from drinking water using natural coagulants, J. Ind. Eng. Chem., 20 (2014) 1727–1731.
  6. M.F. Chong, K.P. Lee, H.J. Chieng, I.I. Syazwani Binti Ramli, Removal of boron from ceramic industry wastewater by adsorption–flocculation mechanism using palm oil mill boiler (POMB) bottom ash and polymer, Water Res., 43 (2009) 3326–3334.
  7. G. Zhu, H. Zheng, W. Chen, W. Fan, P. Zhang, T. Tshukudu, Preparation of a composite coagulant: polymeric aluminum ferric sulfate (PAFS) for wastewater treatment, Desalination, 285 (2012) 315–323.
  8. S.M. Miller, E.J. Fugate, V.O. Craver, J.A. Smith, J.B. Zimmerman, Toward understanding the efficacy and mechanism of Opuntia spp. as a natural coagulant for potential application in water treatment, Environ. Sci. Technol., 42 (2008) 4274–4279.
  9. N.A. Oladoja, Headway on natural polymeric coagulants in water and wastewater treatment operations, J. Water Process Eng., 6 (2015) 174–192.
  10. S. Dhivya, S.T. Ramesh, R. Gandhimathi, P.V. Nidheesh, Performance of natural coagulant extracted from Plantago ovata seed for the treatment of turbid water, Water Air Soil Pollut., 228 (2017) 423, doi: 10.1007/s11270-017-3592-1.
  11. J.P. Wang, Y.Z. Chen, Y. Wang, S.J. Yuan, H.Q. Yu, Optimization of the coagulation–flocculation process for pulp mill wastewater treatment using a combination of uniform design and response surface methodology, Water Res., 45 (2011) 5633–5640.
  12. A.K. Tolkou, A.I. Zouboulis, Synthesis and coagulation performance of composite poly-aluminum-ferric-silicatechloride coagulants in water and wastewater, Desal. Water Treat., 53 (2014) 3309–3318.
  13. J.R. Jeon, E.J. Kim, Y.M. Kim, K. Murugesan, J.H. Kim Y.S. Chang, Use of grape seed and its natural polyphenol extracts as a natural organic coagulant for removal of cationic dyes, Chemosphere, 77 (2009) 1090–1098.
  14. A.I. Zouboulis, P.A. Moussas, Polyferric silicate sulphate (PFSiS): preparation, characterisation and coagulation behaviour, Desalination, 224 (2008) 307–316.
  15. S.Y. Choy, K.M.N. Prasad, T.Y. Wu, R.N. Ramanan, A review on common vegetables and legumes as promising plant-based natural coagulants in water clarification, Int. J. Environ. Sci. Technol., 12 (2015) 367–390.
  16. M.G. Antov, M.B. Šćiban, J.M. Prodanović, Evaluation of the efficiency of natural coagulant obtained by ultrafiltration of common bean seed extract in water turbidity removal, Ecol. Eng., 49 (2012) 48–52.
  17. D. Wang, W. Sun, Y. Xu, H. Tang, J.Gregory, Speciation stability of inorganic polymer flocculant-PACl, Colloids Surf., A, 243 (2004) 1–10.
  18. X. Niu, X. Li, J. Zhao, Y. Ren, Y. Yang, Preparation and coagulation efficiency of polyaluminium ferric silicate chloride composite coagulant from wastewater of high-purity graphite production, J. Environ. Sci., 23 (2011) 1122–1128.
  19. M. Šćiban, M. Klašnja, M. Antov, B. Škrbić, Removal of water turbidity by natural coagulants obtained from chestnut and acorn, Bioresour. Technol., 100 (2009) 6639–6643.
  20. J. Duan, J. Gregory, Coagulation by hydrolysing metal salts, Adv. Colloid Interface Sci., 100–102 (2003) 475–502.
  21. A.I. Zouboulis, N.D. Tzoupanos, Polyaluminium silicate chloride-A systematic study for the preparation and application of an efficient coagulant for water or wastewater treatment, J. Hazard. Mater., 162 (2009) 1379–1389.
  22. A. Matilainen, M. Vepsäläinen, M. Sillanpää, Natural organic matter removal by coagulation during drinking water treatment: a review, Adv. Colloid Interface Sci., 159 (2010) 189–197.
  23. P.P. Hellstén, J.M. Salminen, K.S. Jørgensen, T.H. Nystén, Use of potassium formate in road winter deicing can reduce groundwater deterioration, Environ. Sci. Technol., 39 (2005) 5095–5100.
  24. G.F. Talu, V. Diyamandoglu, Formate ion decomposition in water under UV irradiation at 253.7 nm, Environ. Sci. Technol., 38 (2004) 3984–3993.
  25. M. Väänänen, L. Kupiainen, J. Rämö, A. Sarpola, J. Tanskanen, Speciation and coagulation performance of novel coagulant - aluminium formate, Sep. Purif. Technol., 86 (2012) 242–247.
  26. APHA, Standard Methods for the Examination of Water and Wastewater, 22nd ed., American Public Health Association, American Water Works Association, Water Environment Federation, 2012.
  27. J.H. Roque-Ruiz, S.Y. Reyes-López, Synthesis of α-Al2O3 nanopowders at low temperature from aluminum formate by combustion process, J. Mater. Sci. Eng., 6 (2016) 1–6.
  28. M. Mikola, J. Tanskanen, Preparation and coagulation performance of solid aluminium formate, J. Water Process Eng., 5 (2015) 1–5.
  29. J.E. Van Benschoten, J.K. Edzwald, Chemical aspects of coagulation using aluminum salts—I. Hydrolytic reactions of alum and polyaluminum chloride, Water Res., 24 (1990) 1519–1526.
  30. C.Y. Yin, Emerging usage of plant-based coagulants for water and wastewater treatment, Process Biochem., 24 (2010) 1437–1444.