当前位置: X-MOL 学术J. Environ. Manag. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synthesis of zeolite/geopolymer composite for enhanced sequestration of phosphate (PO43−) and ammonium (NH4+) ions; equilibrium properties and realistic study
Journal of Environmental Management ( IF 8.0 ) Pub Date : 2021-09-11 , DOI: 10.1016/j.jenvman.2021.113723
Mohamed Abdel Salam 1 , Mohamed Mokhtar 1 , Soha M Albukhari 1 , Doaa F Baamer 1 , Leonardo Palmisano 2 , Ali A AlHammadi 3 , Mostafa R Abukhadra 4
Affiliation  

Zeolite impeded geopolymer (Z/G) was synthesized from natural kaolinite and diatomite. The structure (Z/G) was characterized as an enhanced adsorbent for PO43− and NH4+ ions from aqueous solutions, groundwater, and sewage water. The synthetic Z/G structure exhibits sequestration capacities of 206 mg/g and 140 mg/g for PO43− and NH4+, respectively which are higher values than the recognized results for the geopolymer and other adsorbents in literature. The sequestration reactions of PO43− and NH4+ by Z/G are of Pseudo-Second order kinetic behavior considering both the Chi-squared (χ2) and correlation coefficient (R2) values. The sequestration reactions occur in homogenous and monolayer forms considering their agreement with Langmuir behavior. The Gaussian energies (12.4 kJ/mol (PO43−) and 10.47 kJ/mol (NH4+)) demonstrate the operation of a chemical sequestration mechanism that might be involved zeolitic ion exchange process and chemical complexation. Additionally, these reactions are exothermic processes of spontaneous and favorable properties based on thermodynamic studies. The Z/G structure is of significant affinity for both PO43− and NH4+ even in the existence of other anions as Cl, HCO3, SO42−, and NO3. Finally, the structure used effectively in the purification of groundwater and sewage water from PO43− and NH4+ in addition to nitrate, sulfate, and some metal ions.



中文翻译:

用于增强磷酸盐 (PO43-) 和铵 (NH4+) 离子螯合的沸石/地质聚合物复合材料的合成;平衡特性和现实研究

沸石阻隔地质聚合物 (Z/G) 由天然高岭石和硅藻土合成。该结构 (Z/G) 被表征为对来自水溶液、地下水和污水的PO 4 3-和 NH 4 +离子的增强吸附剂。合成的 Z/G 结构对 PO 4 3-和 NH 4 + 的螯合能力分别为 206 mg/g 和 140 mg/g ,这比文献中地质聚合物和其他吸附剂的公认结果要高。PO的螯合反应4 3-和NH 4 +由Z / G是伪二阶动力学行为同时考虑卡方(χ 2) 和相关系数 (R 2 ) 值。考虑到它们与朗缪尔行为的一致性,螯合反应以均质和单层形式发生。高斯能量(12.4 kJ/mol (PO 4 3- ) 和 10.47 kJ/mol (NH 4 + ))证明了可能涉及沸石离子交换过程和化学络合的化学螯合机制的操作。此外,这些反应是基于热力学研究的自发和有利特性的放热过程。Z/G 结构对 PO 4 3-和 NH 4 +都具有显着的亲和力,即使存在其他阴离子如 Cl - , HCO 3、SO 4 2−和 NO 3 。最后,除了硝酸盐、硫酸盐和一些金属离子之外,该结构还有效地用于净化地下水和污水中的 PO 4 3-和 NH 4 +

更新日期:2021-09-12
down
wechat
bug