Stabilization of Pb, Cd, and Zn in soil by modified-zeolite: Mechanisms and evaluation of effectiveness

Synthesis of Acid–Base Bifunctional Catalysts by In Situ Growth of Co-LDH Nanosheets on HY Zeolite To Enhance Co(OH)x Utilization for Microalgal Lipid Conversion

“…The peaks of HY at 532.5 and 531.7 eV were attributed to Si–O–Si and Si–O–Al groups, respectively . Co-LDH exhibited three peaks at 530.4, 531.9, and 533.9 eV corresponding to surface oxygen (e.g., hydroxyl, chemisorbed oxygen, or lattice oxygen), Co–OH, and H 2 O. , After the growth of Co-LDH nanosheets, the peak belonging to Si–O–Al in HY-4 disappeared, and two peaks appeared at 531.9 and 530.9 eV, which were attributed to Co–OH and Si–O–Co groups, respectively. , This indicated that Co ions can be anchored on the bridging O atom of the Si–OH–Al tetrahedron and replace the proton to form a new Si–O–Co structure, which can be further used as a growth site for Co-LDH nanosheets to form Co–OH bonds. , With the increase in the Co ion content, the content of Si–O–Si groups gradually decreased, whereas that of Co–OH groups increased, indicating the formation of the Co-LDH shell.…”

“…35,37 This indicated that Co ions can be anchored on the bridging O atom of the Si−OH−Al tetrahedron and replace the proton to form a new Si−O−Co structure, which can be further used as a growth site for Co-LDH nanosheets to form Co−OH bonds. 21,38 With the increase in the Co ion content, the content of Si−O−Si groups gradually decreased, whereas that of Co−OH groups increased, indicating the formation of the Co-LDH shell.…”

Heavy metals in soils of Mayabeque, Cuba: multifaceted and hardly discernable contributions from pedogenic and anthropogenic sources

“…1 B) should emit any heavy metals. To the contrary, zeolite is a highly sorptive aluminosilicate (Pahlavanzadeh & Motamedi, 2020 ) that is often used to bind heavy metals for remediation purposes for instance in soils (Ma et al, 2022 ) or wastewaters (Elboughdiri, 2020 ; Pahlavanzadeh & Motamedi, 2020 ). The results of this section are summarised in Table 1 , f.…”

A Comprehensive Evaluation System for the Stabilization Effect of Heavy Metal-Contaminated Soil Based on Analytic Hierarchy Process

“…Recently, soil remediation has gotten a lot of attention because of issues with food safety and soil degradation caused by a heavy metal contamination [ 8 ]. The commonly used amendments are lime [ 9 ], calcium carbonate [ 10 ], fly ash [ 11 ], hydroxyapatite [ 12 ], biochar [ 13 ] and zeolite [ 14 ]. Studies have shown that various amendments exhibit different stabilization effects [ 10 ].…”