2. Materials and methods
2.1 Materials
The extractant TMPD (97%) and the
diluent CCl4 (97%) were purchased from TCI Co. Ltd..
Boric acid (99.5%), purchased from Tianjin Kemiāou Chemical Reagent
Co., was used as the boron source. Ultrapure water was used in all
experiments. The simulated brine was prepared by dissolving
H3BO3 in saturated magnesium chloride
solution or ultrapure water, while
the pH value of experimental solutions was adjusted using HCl or NaOH.
All reagents were of analytical grade and were used without further
purification.
The SL brine used in this study was collected from the Xitaijiner SL
(located in the central part of the Qaidam Basin in China) and provided
by Qinghai Citic Guoan Co.. The main characteristics of the brine are
presented in Table 1.
Table 1. Main characteristics of the brine.