Synthesis of mesoporous lanthanum hydroxide with enhanced adsorption performance for phosphate removal

Abstract

MLHO exhibited outstanding phosphate removal performance with a high adsorption capacity as well as efficient removal in low P concentrations.

Toward efficient dye degradation and the bactericidal behavior of Mo-doped La2O3 nanostructures

“…The electronic and optical properties were computed employing the more accurate Heyd-Scuseria-Ernzerhof hybrid functional (HSE06). 57-59 La(OH) 3 (JCPDS no: 36-1481), which arose as La 2 O 3 is hygroscopic in nature and upon exposure to a moist environment it quickly changes to La(OH) 3 , as reported by Fleming et al [61][62][63] No undesired peak appeared in the synthesized samples, suggesting the high purity of the nanostructures. The average size of the crystallites was found to be in the range of 13.1-10.6 nm, as estimated using Scherrer's formula.…”

“…XRD was employed on control and Mo-doped La 2 O 3 in 2θ range of 20°-70° to examine the crystal structure, phase purity, and size of crystallites (figure 4 changes to La(OH) 3 , as reported by Fleming et al (61)(62)(63). No undesired peak appeared in the synthesized samples suggesting high purity of nanostructures .…”

A comprehensive review on nitrate and phosphate removal and recovery from aqueous solutions by adsorption

“…Gibbs free energy change of the sorption (ΔG o ) will be determined using Equation (1). It is reported that the negative value of ΔG o indicates spontaneity of adsorption (Shin et al 2004;Mayer et al 2016;Monfet et al 2017;Ruzhitskaya & Gogina 2017;Xiao et al 2017;Zhang et al 2017;Liu et al 2018;Meena 2018;Prashantha Kumar et al 2018;Berkessa et al 2019;Kim et al 2019;Bacelo et al 2020). The value of ΔG o , which increases (Deng & Shi 2015;Mor et al 2016;Aljeboree et al 2017;Yang et al 2017;Banu et al 2019;Gaidoumi et al 2019 (Chatterjee & Woo 2009;Rezaei Kalantary et al 2016;Song et al 2016;Liu et al 2019aLiu et al , 2019bZhang et al 2019), indicates that the adsorption process is favorable at low and high temperatures, respectively.…”

“…To combat these effects, countries and organizations set nitrate and phosphate discharge limits for water bodies. According to European Union (EU) countries, phosphate discharge to sensitive water bodies such as lakes and rivers is set to be less than 0.01 and 0.07 mg/L, respectively (Guignard et al 2017;Ruzhitskaya & Gogina 2017;Berkessa et al 2019;Kim et al 2019). The US Environmental Protection Agency (EPA) also highly recommends the maximum permissible level of nitrate in drinking water to be 10 mg/L (Bhatnagar & Sillanpää 2011;Rashidi Nodeh et al 2017).…”

Phosphate removal and recovery by lanthanum-based adsorbents: A review for current advances

“…J o u r n a l P r e -p r o o f 10 Mesoporous materials have a controllable morphology, and they are widely concerned because of their large specific surface area and abundant active sites. Kim et al (2019) prepared ordered mesoporous lanthanum oxide (MLHO) using a hard template method, in which the size and distribution of pores were controlled mainly by adjusting the template structure and synthesis conditions. The material can quickly remove low concentration of phosphate within 10 min, and its maximum adsorption capacity is 109.41 mg P/g by using Langmuir simulation.…”