Adsorption–Desorption Properties of Granular EP/HMO Composite and Its Application in Lithium Recovery from Brine

Abstract

The forming of adsorbent powder is the bottleneck of the current technology for lithium adsorption from brine. In this study, an epoxy resin (E-12) was directly adopted to prepare a cylindrical granular adsorbent (the EP/HMO composite) with excellent adsorption performance. Furthermore, the conventional adsorption–desorption process was optimized to improve the adsorptive efficiency for lithium. The batch experimental results showed that the adsorptive capacity for lithium per gram of granular adsorbents was 30.2 mg g–1, disclosing the highest uptake of lithium reported in the literature to our knowledge. The continuous adsorption–desorption experimental results presented that the adsorptive capacities for lithium in LiCl solution and sampled brine were 21.3 mg g–1 HMO and 17.2 mg g–1 HMO, respectively. Moreover, 30 cyclic adsorption–desorption experiments were carried out under optimized operating conditions. The lithium recovery rate of the optimized method was 2.34 times higher than that of the conventional method, which was beneficial for the industrial application of adsorption with a packed column.

Efficient Lithium Extraction from Shale Gas Wastewater Using Sodium Alginate/H1.33Mn1.67O4 Composite Granular Adsorbents

“…The high selectivity for Li + is rationalized with the ion sieve effect of the HMO: the spinel structure size is suitable for Li + , and suitable ion exchange occurs between H + and Li + . According to this rationalization, other metal ions can only be adsorbed on the surface by van der Waals force because their ionic radius is larger than the adsorption site/cavity size and/or because the free energy of hydration is larger than Li + , which prevents their entry into the HMO cavity site. , …”

“…According to this rationalization, other metal ions can only be adsorbed on the surface by van der Waals force because their ionic radius is larger than the adsorption site/cavity size and/or because the free energy of hydration is larger than Li + , which prevents their entry into the HMO cavity site. 52,53 Results of Lithium Extraction and Recovery in Preliminary Depth Filtration Experiments. The emptybed contact time (EBCT) is an important parameter related to the reactor volume size or to the flow rate processable in a system and should be as small as possible to ensure the economy of the process.…”

Simultaneous Recovery of Lithium and Boron from Brine by the Collaborative Adsorption of Lithium-Ion Sieves and Boron Chelating Resins

“…For the adsorption method, the selection of adsorbents is very important. , Three kinds of adsorbents are reported frequently for lithium recovery from brines, including aluminum salt adsorbents, − manganese-type lithium-ion sieves (HMO) − and titanium-type lithium-ion sieves (HTO). − Compared with aluminum salt adsorbents, lithium-ion sieves have obviously higher Li + adsorption capacities for the low-grade lithium recovery from brines, for example, actually achieving ∼40 mg (Li + )/g adsorption capacity on H 1.6 Mn 1.6 O 4 ion sieves, ∼30 mg (Li + )/g adsorption capacity on H 2 TiO 3 ion sieves. In our laboratory, we have prepared titanium-type lithium-ion sieves (PVB-HTO granules), and it is found that the home-made PVB-HTO granules have good cycling stability for the repetitive experiments of lithium adsorption and acid desorption. , Therefore, we use the home-made PVB-HTO granules to recover lithium from brines in this article.…”

Tri(ethylene glycol) modified HYC‐100 resin for lithium ion recovery from aqueous solution

“…10 Polymeric resin have been well-developed for wide application for water purification, metal ion adsorption and medical waste treatment, and so forth. [11][12][13][14][15][16][17] Although the crown ethers have been recognized as excellent binding units for alkali metal ion, its toxicity and high costs prevent direct modification on the polymeric resin to enhance the adsorption performance. [18][19][20][21][22][23][24][25][26][27] Therefore, to develop highly efficient polymeric resin showing satisfactory lithium adsorption capacity, low cost and good recycling abilities in the LIB industrial wastewater still pose great challenging.…”

“…Their adsorption capacities are not satisfactory with the capacity less than 7 mg/L 10 . Polymeric resin have been well‐developed for wide application for water purification, metal ion adsorption and medical waste treatment, and so forth 11–17 . Although the crown ethers have been recognized as excellent binding units for alkali metal ion, its toxicity and high costs prevent direct modification on the polymeric resin to enhance the adsorption performance 18–27 .…”