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Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides
นักวิจัย : Lim, Teik-Thye , Goh, Kok Hui , Goei, Ronn , Dong, Zhili
คำค้น : DRNTU::Engineering::Materials::Testing of materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2552
อ้างอิง : Lim, T. T., Goh, K. H., Goei, R., & Dong, Z. L. (2009). Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides. Water Science & Technology, 59(5), 1011-1017. , 0273-1223 , http://hdl.handle.net/10220/9405 , http://dx.doi.org/10.2166/wst.2009.072
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Water science & technology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

In this study, Mg/Al layered double hydroxides (LDHs) were investigated for their potential in scavenging several harmful oxyanions from aqueous solution. LDHs could effectively remove oxyanions and the selectivity of LDHs was governed by both the valencies and the ionic radii of the oxyanions. LDHs prepared by the fast coprecipitation with hydrothermal treatment (FCHT) method and sol-gel with solvothermal treatment method (SGST) had higher oxyanion (i.e. arsenate) removal efficiency than those prepared by the conventional routes, owing to their lower carbonate content, higher surface area, larger pore volume, larger pore size, and nanocrystalline characteristic. The sorption of arsenate by FCHT-LDH was found primarily due to anion exchange mechanism and might involve a secondary sorption mechanism. The negative DG° for arsenate sorption confirmed the spontaneity of the removal process. The positive values of DH° and DS° provided further evidence of the anion exchange process in the removal mechanism.

บรรณานุกรม :
Lim, Teik-Thye , Goh, Kok Hui , Goei, Ronn , Dong, Zhili . (2552). Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lim, Teik-Thye , Goh, Kok Hui , Goei, Ronn , Dong, Zhili . 2552. "Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lim, Teik-Thye , Goh, Kok Hui , Goei, Ronn , Dong, Zhili . "Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2552. Print.
Lim, Teik-Thye , Goh, Kok Hui , Goei, Ronn , Dong, Zhili . Mechanistic and thermodynamic studies of oxyanion sorption by various synthetic Mg/Al layered double hydroxides. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2552.