ชื่อเรื่อง | : | Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles |
นักวิจัย | : | Goh, Kok Hui , Lim, Teik-Thye , Banas, Agnieszka , Dong, Zhili |
คำค้น | : | DRNTU::Engineering::Materials |
หน่วยงาน | : | Nanyang Technological University, Singapore |
ผู้ร่วมงาน | : | - |
ปีพิมพ์ | : | 2553 |
อ้างอิง | : | Goh, K. H., Lim, T. T., Banas, A., & Dong, Z. (2010). Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles. Journal of Hazardous Materials, 179(1-3), 818-827. , 0304-3894 , http://hdl.handle.net/10220/8869 , http://dx.doi.org/10.1016/j.jhazmat.2010.03.077 |
ที่มา | : | - |
ความเชี่ยวชาญ | : | - |
ความสัมพันธ์ | : | Journal of hazardous materials |
ขอบเขตของเนื้อหา | : | - |
บทคัดย่อ/คำอธิบาย | : | The sorption ability of fast-coprecipitated and hydrothermally-treated Mg/Al layered double hydroxide nanoparticles (FCHT-LDH) for various oxyhalides and oxyanions was evaluated. Interactions of oxyhalide such as monovalent bromate or oxyanions such as divalent chromate and divalent vanadate with FCHT-LDH were investigated using a combination of macroscopic (batch sorption/desorption studies and electrophoretic mobility (EM) measurements) and microscopic techniques (CHNS/O, XRD, FTIR, XPS, and EXAFS analyses). The sorption studies on various oxyanions and oxyhalides suggested that their sorption characteristics on FCHT-LDH were largely governed by their ionic potentials and molecular structures. Oxyanions which have ionic potentials higher than 7 nm−1 were found to be more readily sorbed by FCHT-LDH than oxyhalides with ionic potentials lower than 5 nm−1. The results obtained also demonstrated that trigonal pyramid oxyhalides showed a lower degree of specificity for FCHT-LDH than the tetrahedral coordinated oxyanions. From the macroscopic and microscopic studies, monovalent oxyhalide sorption on FCHT-LDH was postulated to occur mainly via anion exchange mechanism with subsequent formation of outer-sphere surface complexes. For polyvalent oxyanion sorption on FCHT-LDH, the mechanisms were possibly associated with both anion exchange and ligand exchange reactions, resulting in the coexistence of outer-sphere and inner-sphere surface complexes. |
บรรณานุกรม | : |
Goh, Kok Hui , Lim, Teik-Thye , Banas, Agnieszka , Dong, Zhili . (2553). Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles.
กรุงเทพมหานคร : Nanyang Technological University, Singapore. Goh, Kok Hui , Lim, Teik-Thye , Banas, Agnieszka , Dong, Zhili . 2553. "Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles".
กรุงเทพมหานคร : Nanyang Technological University, Singapore. Goh, Kok Hui , Lim, Teik-Thye , Banas, Agnieszka , Dong, Zhili . "Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles."
กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2553. Print. Goh, Kok Hui , Lim, Teik-Thye , Banas, Agnieszka , Dong, Zhili . Sorption characteristics and mechanisms of oxyanions and oxyhalides having different molecular properties on Mg/Al layered double hydroxide nanoparticles. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2553.
|