The extraction mechanism of At is inferred as following:The complex-anions AtX2-(X = Cl-, Br-, I-, OH-) were formed, mainly in aqueous solutions and paired with the cations M+(M=H+, K+, Na+), then the ion pair was extracted by crown ethers .
英
美
- At在溶液中主要形成絡(luò )合陰離子AtX_2-(X=CI~-,Br~-,I~-,OH~-),它與適宜的陽(yáng)離子M~+(M=H~+,K~+,Na~+)配成離子對被冠醚所萃取,這是At被萃取的主要形式,萃取反應簡(jiǎn)單表示為:M~++C_(有)+AtX_2~-(?)
