Graduate School of Environmental Studies, Tohoku University, Aramaki, Aoba-ku, Sendai, Japan.
Chemosphere. 2012 Jun;88(2):250-4. doi: 10.1016/j.chemosphere.2012.03.045. Epub 2012 Apr 10.
Although effective treatments of SO(x) are essential for preventing air pollution, current methods pose other environmental problems such as increased amounts of desulfurized gypsum and reduced landfill lifetimes. We report a process for removing SO(2) from waste streams using a Mg-Al oxide slurry. The ability of the mixed oxide to remove SO(2) increased with slurry quantity and temperature but decreased with time. SO(2) was removed through the reconstruction of a Mg-Al layered double hydroxide (Mg-Al LDH) intercalated with SO(3)(2-), which was derived from the dissociation of H(2)SO(3) upon dissolution of SO(2) in the slurry. SO(2) was not adsorbed onto the surface of the Mg-Al oxide. These results suggest that SO(2) removal using a Mg-Al oxide slurry may be possible without the concomitant problems of conventional treatment methods.
虽然有效治疗 SO(x)对于防止空气污染至关重要，但目前的方法会带来其他环境问题，例如增加脱硫石膏的数量和减少垃圾填埋场的使用寿命。我们报告了一种使用 Mg-Al 氧化物浆料从废物流中去除 SO(2)的方法。混合氧化物去除 SO(2)的能力随着浆料量和温度的增加而增加，但随着时间的推移而降低。SO(2)通过重建插层有 SO(3)(2-)的 Mg-Al 层状双氢氧化物 (Mg-Al LDH) 而被去除，这是由于 SO(2)在浆料中溶解时 H(2)SO(3)的离解而产生的。SO(2)没有吸附在 Mg-Al 氧化物的表面上。这些结果表明，使用 Mg-Al 氧化物浆料去除 SO(2)可能不会产生传统处理方法的伴随问题。
