Page 222 - 《精细化工》2023年第4期

g908g ㇫㏳ࡃጒ FINE CHEMICALS す 40 ࢤ

88.72%Ƞ85.10%ȡ䔆䄡ᬻ㏼Ά䚥䨹ᩦᕔऻ喑⽨ภ◚ 3.2 pH ᄦ⩢॥䭱᩵᳉⮱ᒞ৺
2+
᠒ᰶᰡສ⮱Ժ⢴ᕔ㘪喑ౕ䒰倅⮱⩢≮ჳᏓ̸Ϻजᰶ Cu ౕ⏣⋟͚⮱ႅౕᒏᐼ̻ pH ჳܴⰥڠ喑ᒀ
2+
䒰๔⮱℁⩢ღ喑ٲᩫ⩢➦ᕔ㞜ສȡ pH>5 ᬣ喑Cu ႅౕᒏᐼͧ Cu(OH) 2 হ Cu(OH) +[33] 喑
2+
ఫ 7d ᭜ౕ⩢≮ჳᏓͧ 2 A/g ᬣ RHC হ MRHC 䔆̺ݖλ⩢Ხᄦ Cu ⮱॥䭱ȡ఍ₑ喑ౕጒ҉⩢ࢸͧ
2+
⩢Ხ㏼䓴 2000 ⁎ᕿ≮ٲᩫ⩢≸䄂ऻ⮱ᓗ⣜ᰟ㏬ȡϻ 0.9 V ̸喑㔰ᄌγ pH ᄦ 200 mL Cu ݊໸䉕䛼⊀Ꮣ
ఫ 7d जⰸݝ喑㏼䓴 2000 ⁎ٲᩫ⩢≸䄂ऻ喑RHCȠ ͧ 100 mg/L ⮱⏣⋟⮱⩢॥䭱᩵᳉⮱ᒞ৺喑㐀᳉㻮ఫ
MRHC-0.1ȠMRHC-0.2ȠMRHC-0.3ȠMRHC-0.4Ƞ 9ȡຯఫ 9 ᝭⹧喑pH ͧ 2Ƞ3Ƞ4Ƞ5 ᬣ喑⩢॥䭱 80 min
2+
MRHC-0.5 Ƞ MRHC-0.6 ⮱℁⩢ღԊᠮ⢴ܳݘͧ ऻ喑Cu ࣨ䮑⢴ܳݘͧ 24.56%Ƞ32.88%Ƞ44.47%Ƞ
75.81%Ƞ88.32%Ƞ90.19%Ƞ92.16%Ƞ91.63%Ƞ91.25%Ƞ 52.64%ȡओใ喑㏼ᐼ喍3喎䃎ツ喑pH ͧ 2Ƞ3Ƞ4Ƞ5
2+
89.70%ȡ㏼䓴̺ह⊀ᏓΆ䚥䨹ั⤳ऻ喑ᩦᕔ⩌➖◚ ᬣ⩢Ხᄦ Cu ⮱॥䭱䛼ܳݘͧ 4.47Ƞ5.98Ƞ8.09Ƞ
+
⩢Ხ⮱ᓗ⣜ᕔ㘪౴℁᱗ᩦᕔ͸ݺᰶ᝭᣽倅ȡڣ͚喑 9.57 mg/gȡᒀ pH 䒰ѻᬣ喑⏣⋟͚ႅౕᒵ็ H 喑⩌
2+
MRHC-0.3 ᓗ⣜⽠Ⴧᕔ㘪ᰭҠȡ ➖◚⩢Ხౕ॥䭱 Cu ⮱䓴⼸͚喑⩞λ⩢Ხ॥䭱Ѻ◦
+
2+
+
ᰶ䭽́ H Ⅱवࡷᒱ䒰ᄼ喑䔆ψ H ᭀ̻ Cu ᒏ᜽》
3 ⩢॥䭱ᕔ㘪≸䄂 ζ॥䭱喑᝭В Cu ࣨ䮑᩵᳉ч䮼Ɑ pH ⮱䭺ѻ㔹̺
2+
2+
᫚अጛȡ෋๔ pH जВ᣽倅 Cu ࣨ䮑⢴喑෋ߍ⩢Ხ
2+
ᄳ MRHC-0.3 ⩢Ხ⩕λ⩢॥䭱 Cu ჋侹喑㔰ᄌ
2+
॥䭱䛼喑ѳ pH 䓴倅чҬ Cu अ᜽ Cu(OH) 2 ↶⼜ౕ
2+
γ⩢ࢸȠpHȠCu ⊀Ꮣᄦ⩢॥䭱᩵᳉⮱ᒞ৺ȡ䕇䓴
2+
⩢Ხ㶕䲏喑ᒞ৺⩢Ხᄦ Cu ⮱॥䭱ȡ᝭В喑䔶᠖ᰭ
ᄦ⩢Ხ䔈㵹็⁎॥䭱-㙞䭱≸䄂喑㶕ᒮڣں⩌ᕔ㘪ȡ
Ҡ pH ͧ 5ȡ
3.1 ⩢ࢸᄦ⩢॥䭱᩵᳉⮱ᒞ৺
ౕ⩢॥䭱჋侹͚喑ጒ҉⩢ࢸ᭜ᒞ৺ڣ॥䭱᩵᳉
⮱ڠ䩛఍㉍ȡ䃫㒛ጒ҉⩢ࢸܳݘͧ 0Ƞ0.6Ƞ0.9Ƞ1.2 V喑
2+
pH ͧ 5 ᬣ喑ᄦ 200 mL Cu ݊໸䉕䛼⊀Ꮣͧ 100 mg/L
⮱⏣⋟䔈㵹⩢॥䭱喑㐀᳉㻮ఫ 8ȡຯఫ 8 ᝭⹧喑⩢
ࢸͧ 0 V ᬣ喑⩢Ხͨ㺮ӊ䲍➖⤳҉⩕॥䭱⏣⋟͚
2+
2+
Cu 喑Cu ࣨ䮑⢴ͧ 15.58%喑ࣨ䮑᩵᳉䒰ጛȡᒀౕ
2+
⩢Ხ͑〜᫪ߍ⩢ࢸऻ喑⏣⋟͚ Cu ࣨ䮑⢴䔽⌽ࡴ倅喑
⩢ࢸͧ 0.6Ƞ0.9Ƞ1.2 V ᬣ喑⩢॥䭱 80 min ऻ喑Cu 2+
ࣨ䮑⢴ܳݘͧ 29.07%Ƞ52.64%Ƞ59.86%ȡᵦᢛᎠᲬ
⩢ღக⤳䃧喑⩢Ხ᝭ፓ⩢㢤̻᫪ߍ⩢ࢸॵₐⰥڠ喑
ఫ 9 pH ᄦ⩢॥䭱᩵᳉⮱ᒞ৺
⩢ࢸ䊷๔喑ᲮᲬ᝭ፓ⩢㢤䊷็喑⩢ᲮᲬ̻⏣⋟⩹䲏 Fig. 9 Effect of pH on electroadsorption effect
ᒏ᜽⮱ࣹ⩢ᅯ㐀Ჱᅞ䊷ࣇ喑⩢॥ᑂ҉⩕෋ᑧ喑⩢Ხ
2+
㶕䲏ज㖇䯳ᰡ็⻨ၽ喑⻨ၽ॥䭱䛼ࢠ䮼͸෋ߍȡ㮪 3.3 Cu ⊀Ꮣᄦ⩢॥䭱᩵᳉⮱ᒞ৺
2+
2+
♣ Cu ࣨ䮑᩵᳉ज䮼⩢ࢸࡴ倅㔹ᓄݝᰶ᩵᣽ࡴ喑ѳ 䃫㒛 Cu ݊໸䉕䛼⊀Ꮣܳݘͧ 50Ƞ100Ƞ150Ƞ
2+
ౕ 1.2 V ⩢ࢸ̸喑⩢Ხ㶕䲏ܧ⣝ᄾ䛼㏏Ḃ㞟ధҀ喑 200 mg/L喑ጒ҉⩢ࢸͧ 0.9 V喑pH ͧ 5喑Cu ⊀Ꮣᄦ
2+
䔆᭜⩞λ Cu ⮱䔅࣌҉⩕Ҭ⩢Ხ㶕䲏ϔ⩌⩢↶⼜⣝ ⩢॥䭱᩵᳉⮱ᒞ৺㻮ఫ 10ȡຯఫ 10 ᝭⹧喑⩢॥䭱
2+
䆎 [32] ȡ఍ₑ喑᱙჋侹䔶⩕ 0.9 V ͧᰭҠጒ҉⩢ࢸȡ 80 min ऻ喑ᒀ Cu ݊໸䉕䛼⊀Ꮣͧ 50 mg/L ᬣ喑Cu 2+
2+
ࣨ䮑⢴ᰭ倅ज䓫 63.82%喠Cu ݊໸䉕䛼⊀Ꮣ෋㜠
2+
200 mg/L ᬣ喑Cu ࣨ䮑⢴ࢡ䭺ͧ 35.18%ȡ䔆᭜఍ͧ
2+
݊໸⊀Ꮣ䊷倅喑⏣⋟͚᝭क़ Cu ᪝Ⱋ䊷็喑㔹⩢Ხ
2+
㘪์॥䭱⮱⻨ၽ䛼गࢍڣ͚̭ᄼ䘕ܳ喑᝭В Cu ࣨ
䮑⢴ч䮼⊀Ꮣ⮱ࡴ倅㔹̸䭺ȡϻఫ 10 जⰸܧ喑Cu 2+
⊀Ꮣ䊷倅喑⩢॥䭱Ꭰ㶎ᬣ䬡䊷ⴚȡ䔆᭜఍ͧ⩢ࢸ̭
2+
Ⴧ⮱ᗲ̸ۢ喑݊໸⊀Ꮣ䊷๔喑⏣⋟͚ܳ᪐⮱ Cu 䊷
็喑䔆෋๔γ⏣⋟̻⩢Ხ㶕䲏⮱⊀Ꮣጛ [34] 喑⻨ၽᰡ
ღᭀ㷘॥䭱ȡहᬣ⩞λ䲆⩢ᑂ߈⮱॥ᑂ҉⩕喑䔆ψ
2+
Cu 㷘ᔘ䕌ࢸ㑖喑ౕᲮᲬ䬡ᒏ᜽⮱ࣹ⩢ᅯ㐀Ჱअᓄ
2+ 2+
ఫ 8 ⩢ࢸᄦ⩢॥䭱᩵᳉⮱ᒞ৺ ᰡߍ㉔ჳ喑Cu ᰡᭀ㷘⩢Ხᢂᡶ॥䭱喑⩢Ხᄦ Cu
Fig. 8 Effect of voltage on electroabsorption effect ⮱॥䭱䕌⢴䮼͸᣽ࡴ喑⩢॥䭱Ꭰ㶎ᬣ䬡㑖ⴚȡ