The advantage of these methods is that the absorbing material can be regenerated so that the waste disposal problem is somewhat mitigated.
Atypical sulfite control methjod is single alkali scrubbing for which the reactions are:
SO2+Na2SO3+H2O=2NaHSO3
Sodium sulfite is then regenerated from the bisulfite by heating:
2NaHSO3=Na2SO3(S)+H2O+SO2(conc)
The concentrated SO2 recovered from this process can be used industrially (for example,in pulp and paper manufacture or for sulfuric acid manufacture).
參考答案:这些方法的优点在于，吸收材料可再生，因此污染处理问题得到了一些缓解。
一个典型的亚硫酸盐控制方法是碱洗涤，反应方程式为：
SO2+Na2SO3+H2O=2NaHSO3
然后通过对酸性亚硫酸盐加热，生成亚硫酸钠：
2NaHSO3=Na2SO3(S)+H2O+SO2(conc)
流程中重新生成的浓缩二氧化硫可以用于工业（例如，纸浆和纸的制造，或硫酸制造）。
累啊，还有多少？