Fe(<scp>ii</scp>)<sub>(aq)</sub>uptake of Mg(<scp>ii</scp>)–Al(<scp>iii</scp>)/Fe(<scp>iii</scp>)–SO<sub>4</sub>/CO<sub>3</sub>HTLCs under alkaline conditions: adsorption and solid state transformation mechanisms
作者:Mario A. Gomez、M. Jim Hendry、Samir Elouatik、Joseph Essilfie-Dughan、Susanta Paikaray
DOI:10.1039/c4ra08802f
日期:——
Abiotic reduction of Mg(II)–Al(III)/Fe(III)–SO4/CO3 hydrotalcites (HTLCs) was investigated under three anoxic abiotic reaction conditions: (1) a target pH of 8 and 10 mM Fe(II)(aq), (2) a target pH of 8 and 0.5 mM Fe(II)(aq), and (3) a target pH of 10 and 0.5 mM Fe(II)(aq). Under both Fe(II)(aq) concentrations and at the targeted pH of 8, the greatest Fe(II)(aq) uptake, Mg(II)(aq) release, and least
在三种缺氧非生物反应条件下研究了Mg(II)-Al(III)/ Fe(III)-SO 4 / CO 3水滑石(HTLCs)的非生物还原:(1)目标pH为8和10 mM Fe(II))(水溶液),(2)8和0.5mM的Fe(的目标pH II)(水溶液),和(3)10和0.5mM的Fe(的目标pH II)(水溶液)。在Fe(II)(aq)浓度和目标pH 8下,最大Fe(II)(aq)吸收Mg(II)(aq)不论层间离子(SO 4或CO 3)如何,铁基HTLC(Mg(II)–Fe(III)–SO 4 / CO 3)的pH释放最小,并且pH偏差最小。相比之下,基于Al的HTLC与目标pH值8相比显示最大的pH漂移;这种现象归因于溶液中剩余的总Fe(II + III)。在10和0.5 mM Fe(II)(aq)的目标pH值下,尽管两种情况下都从溶液中去除了99%的Fe(II),Al基HTLC的pH值仍高于Fe基HTLC