腐植酸
腐植痠
부식산
HUMIC ACID
2013年
5期
33-36
,共4页
Alexandre G.S.Prado(著)%Claudio Airoldi(著)%张志国(译)
Alexandre G.S.Prado(著)%Claudio Airoldi(著)%張誌國(譯)
Alexandre G.S.Prado(저)%Claudio Airoldi(저)%장지국(역)
腐植酸%热力学数据%二价阳离子%吸附
腐植痠%熱力學數據%二價暘離子%吸附
부식산%열역학수거%이개양리자%흡부
humic acid%thermodynamic data%divalent cations%adsorption
研究了水溶液中二价阳离子(Cu、Ni、Co和Zn)与商业化腐植酸(HAAl)和泥炭腐植酸(HAPs)的相互作用。研究采用修正的兰缪尔方程拟合了一系列吸附等温曲线。实验发现,HAAl对前述金属离子的最大吸附摩尔数分别为0.55±0.02 mmol/g,0.66±0.02 mmol/g,0.54±0.02 mmol/g,0.40±0.02 mmol/g,HAPs对它们的最大吸附摩尔数分别为:0.63±0.03 mmol/g,0.61±0.06 mmol/g,0.55±0.02 mmol/g,0.54±0.03 mmol/g。对于相同的序列,HAAl和HAPS之间的相互作用所吸收的热量值分别为2.4±1.0 mmol/g,8.4±0.9 mmol/g,18.3±0.9 mmol/g,10.6±0.9 kJ/mol,和18.4±1.2 mmol/g,15.9±1.4 kJ/mol,15.4±1.2 kJ/mol,15.0±1.2 kJ/mol。由于吉布斯自由能为负,离子络合作用过程必然伴随着熵的增加。
研究瞭水溶液中二價暘離子(Cu、Ni、Co和Zn)與商業化腐植痠(HAAl)和泥炭腐植痠(HAPs)的相互作用。研究採用脩正的蘭繆爾方程擬閤瞭一繫列吸附等溫麯線。實驗髮現,HAAl對前述金屬離子的最大吸附摩爾數分彆為0.55±0.02 mmol/g,0.66±0.02 mmol/g,0.54±0.02 mmol/g,0.40±0.02 mmol/g,HAPs對它們的最大吸附摩爾數分彆為:0.63±0.03 mmol/g,0.61±0.06 mmol/g,0.55±0.02 mmol/g,0.54±0.03 mmol/g。對于相同的序列,HAAl和HAPS之間的相互作用所吸收的熱量值分彆為2.4±1.0 mmol/g,8.4±0.9 mmol/g,18.3±0.9 mmol/g,10.6±0.9 kJ/mol,和18.4±1.2 mmol/g,15.9±1.4 kJ/mol,15.4±1.2 kJ/mol,15.0±1.2 kJ/mol。由于吉佈斯自由能為負,離子絡閤作用過程必然伴隨著熵的增加。
연구료수용액중이개양리자(Cu、Ni、Co화Zn)여상업화부식산(HAAl)화니탄부식산(HAPs)적상호작용。연구채용수정적란무이방정의합료일계렬흡부등온곡선。실험발현,HAAl대전술금속리자적최대흡부마이수분별위0.55±0.02 mmol/g,0.66±0.02 mmol/g,0.54±0.02 mmol/g,0.40±0.02 mmol/g,HAPs대타문적최대흡부마이수분별위:0.63±0.03 mmol/g,0.61±0.06 mmol/g,0.55±0.02 mmol/g,0.54±0.03 mmol/g。대우상동적서렬,HAAl화HAPS지간적상호작용소흡수적열량치분별위2.4±1.0 mmol/g,8.4±0.9 mmol/g,18.3±0.9 mmol/g,10.6±0.9 kJ/mol,화18.4±1.2 mmol/g,15.9±1.4 kJ/mol,15.4±1.2 kJ/mol,15.0±1.2 kJ/mol。유우길포사자유능위부,리자락합작용과정필연반수착적적증가。
The adsorption behavior of divalent cations M2+(Cu, Ni, Co and Zn) with commercial humic acid (HAAl) and also withan extracted fraction of peat soil (HAPs) was followed in aqueous solution. The series of adsorption iso-therms were ifttedto a modiifed Langmuir equation. The maximum number of moles adsorbed gave:0.55 ± 0.02 mmol/g, 0.66 ± 0.02 mmol/g, 0.54 ± 0.02 mmol/g, 0.40 ± 0.02 mmol/g for HAAl and 0.63 ± 0.03 mmol/g, 0.61 ± 0.06 mmol/g, 0.55 ± 0.02 mmol/g, 0.54 ± 0.03 mmol/g for solid HAPs, for copper, nickel, zinc and cobalt, respectively. The same in-teraction followed calorimetrically gave endothermic values:2.4 ± 1.0 kJ/mol, 8.4 ± 0.9 kJ/mol, 18.3 ± 0.9 kJ/mol, 10.6 ± 0.9 kJ/mol and 18.4 ± 1.2 kJ/mol, 15.9 ± 1.4 kJ/mol, 15.4 ± 1.2 kJ/mol, 15.0 ± 1.2 kJ/mol for HAAl and HAPs, respec-tively, for the same sequence. Because all Gibbs free energies were negative. Complexation must beaccompanied by an increase in entropy.