Removal of lead, cadmium and copper ions from aqueous solutions by using ion exchange resin C 160

Abstract

Industrial waste solutions may contain toxic Pb, Cu, Cd and other metal ions. These ions may also be components of leachates in landfills of ores. The toxicity of the ionic forms of these metals is high. For this reason the paper presents the results of studies on one of the methods to reduce their concentration in aqueous solutions. The article presents the results of studies on the removal of Pb2+, Cd2+ and Cu2+ ions from model aqueous solutions with synthetic ion exchange resin C 160 produced by Purolite. The investigated ion exchanger contains sulfonic acid groups (-SO3H) in its structure and is a strongly acidic cation-exchange resin. The range of the studied initial concentrations of the Pb2+, Cd2+ and Cu2+ ions in the solutions was from 6.25 mg/L to 109.39 mg/L. The results confirmed that the used ion exchange resin C160 efficiently removes the above-mentioned ions from the studied solutions. The highest degree of purification was achieved in lead solutions for the assumed range of concentrations and conditions of the ion exchange process. It reached 99.9%. In the case of other solutions, the ion exchange process occurs with lower efficiency, however it remains high and amounts to over 90% for all the ions. The results of research were interpreted on the basis of the Langmuir adsorption model. For each studied ion, sorption capacity of the ion exchange resin increases until the saturation and equilibrium state is reached. Based on the interpretation of the Langmuir equation coefficients, an indication can be made that the studied ion exchange resin has a major sorption capacity towards the copper ions. In their case, the highest value of constant qmax was obtained in the Langmuir isotherm. For Cu2+ ions it was 468.42 mg/g. For Pb2+ and Cd2+ ions, this parameter reached the values of 112.17 mg/g and 31.76 mg/g, respectively. Ion exchange resin C 160 shows the highest affinity for the Pb2+ ions. In this case, the achieved value of coefficient b is highest and equals 1.437 L/mg.

Development of Biosorbent Derived from the Endocarp Waste of Gayo Coffee for Lead Removal in Liquid Wastewater—Effects of Chemical Activators

“…Inorganic adsorbents include zeolites, silica sand, lignite, kaolin and bentonite [12,13]. There are also organic adsorbents like ion-exchangeresins that have been proven effective to remove heavy metals like Pb [6,14,15]. In addition, there are also nature-sourced bio-sorbents which are commonly developed from the lowcost by-products of agricultural, domestic and industrial sectors [10].…”

Removal of Cd (II) from Aqueous Media by Adsorption onto Chemically and Thermally Treated Rice Husk

“…In recent years, a wide variety of techniques have been applied for removal of heavy metal from aqueous media: ion exchange [8], bioremediation by microorganism [9], biometallurgy [10], and bioelectrochemical metal recovery [11], among others. In this context, adsorption has been referenced as an efficient and easy-to-use alternative.…”

Adsorption and removal studies of cadmium ion onto sulphonic/phosphonic acid functionalization resins

“…where K (L/g) and B (J/mol) are the Temkin and the heat of sorption constants, respectively. R = universal gas constant (8.314 J/mol/K), and T = temperature at 298.15 K. Bekri-Abbes et al [45] Lewatit MonoPlus MP 64 21.93 pH = 5.8 and 6.4, 25 C K o łody nska and Hubicki [46] 1,8-DAN/XAD-4 19.16 pH = 7, 25 C Hoque et al [47] PIDA1 33.7 pH = 0.5-2.5, 25 C Wang et al [48] PIDA2 29.2 pH = 0.5-2.5, 25 C Wang et al [48] PIDA3 32.6 pH = 0.5-2.5, 25 C Wang et al [48] PIDA4 22.48 pH = 0.5-2.5, 25 C Wang et al [48] PAA 16.86 pH = 0.5-2.5, 25 C Wang et al [48] FeO3@APS@AA-CO-CA 29.6 pH = 5.5, 25 C Ge et al [49] Na-Mt 22.4 pH = 4, 25 C Chen et al [50] Ca-Mt 17.8 pH = 4, 25 C Chen et al [50] C160 31.76 pH = 4.1, 25 C B o żęcka et al [51] Dowex 50W 27.65 pH = 8-9, 25 C Pehlivan and Altun [25] CR-20 35.7 pH = 4-6, 25 C Jachuła et al [23] MC-50 36.3 pH = 4-6, 25 C Jachuła et al [23] CNP-80 16.02 pH = 4-6, 25 C Jachuła et al [23] Dowex In this study, the Langmuir, Freundlich, and Temkin models are employed to understand the equilibrium characteristics of Cd (II) adsorption on Dowex G-26 and MTS9570 resins, which are shown in Figures 8-10. The Langmuir, Freundlich, and Temkin isotherm parameters for the adsorption of cadmium (II) ions onto resins, which are calculated using isotherm equations and their correlation coefficients, are listed in Table 2.…”