Details

Autor(en) / Beteiligte

• Jian-Hong, Luo
• Jun, Li
• Long-fei, Lin

Titel

Solvent extraction of calcium ion from cation-exchange resin regeneration wastewater using D2EHPA and saponified D2EHPA

Ist Teil von

• Desalination and water treatment, 2015-01, Vol.53 (5), p.1286-1291

Ort / Verlag

Abingdon: Taylor & Francis Ltd

Erscheinungsjahr

2015

Link zum Volltext

Beschreibungen/Notizen

• Solvent extraction experiments of Ca super(2+) with D2EHPA and 15% saponified D2EHPA from cation-exchange resin regeneration wastewater have been performed. Compared with the extraction efficiency (E) of Ca super(2+) with D2EHPA, the use of 15% saponified D2EHPA significantly increases the extraction efficiency (E) of Ca super(2+). In this work, a systematic study on the extraction of Ca super(2+) from cation-exchange resin regeneration wastewater using saponified D2EHPA has been carried out. To study the extraction efficiency and advantages of the method in the removal of Ca super(2+), various parameters such as saponification ratio of D2EHPA sub(,) D2EHPA mass fraction, reaction temperature, phase mass ratio, initial pH of wastewater, transfer-speed, and transfer-time are studied and optimized. The results show that Ca super(2+) in wastewater can be effectively removed by saponified D2EHPA. An extraction efficiency of more than 99.9% is attained at the optimized parameters and the cation-exchange resin regeneration waste-water can be discharged directly by two levels of extraction, and it meets the Chinese National Emission Standards.