CAJ | 학술논문

采用差分脉冲阳极伏安法实现生物冶金中铜(II)浓度的在线检测。结果表明，当体系中仅有铜(II)存在且其浓度范围为1μmol/L~1 mmol/L时，差分脉冲阳极伏安法所测阳极氧化峰电流与浓度间有很好的线性度。当此体系中含有0.2 mol/L KCl时，铜离子检测的线性范围从1 mmol/L (64 mg/L)扩展到100 mmol/L (6.4 g/L)。在此条件下，二价铜离子的还原分为两步连续的单电子转移过程，中间态为Cu+的络合物CuCl-。此外，在铜的生物冶金体系中，经常会有铁离子存在，因此对铜离子检测的铁离子干扰也进行了研究，结果表明，当铁离子浓度低于100 mmol/L (5.6 g/L)时，其对铜离子检测的干扰可忽略。
채용차분맥충양겁복안법실현생물야금중동(II)농도적재선검측。결과표명，당체계중부유동(II)존재차기농도범위위1μmol/L~1 mmol/L시，차분맥충양겁복안법소측양겁양화봉전류여농도간유흔호적선성도。당차체계중함유0.2 mol/L KCl시，동리자검측적선성범위종1 mmol/L (64 mg/L)확전도100 mmol/L (6.4 g/L)。재차조건하，이개동리자적환원분위량보련속적단전자전이과정，중간태위Cu+적락합물CuCl-。차외，재동적생물야금체계중，경상회유철리자존재，인차대동리자검측적철리자간우야진행료연구，결과표명，당철리자농도저우100 mmol/L (5.6 g/L)시，기대동리자검측적간우가홀략。
On-line Cu (II) ion concentration detection in bioleaching system was achieved by anodic stripping differential pulse voltammetry (ASDPV). Good linearity between Cu (II) concentration and oxidation peak current was obtained when Cu (II) existed in 0K media in the concentration range of 1μmol/L (64μg/L) to 1 mmol/L (64 mg/L). Moreover, when 0.2 mol/L KCl was added into this media, the linear detection range could be extended from 1 mmol/L to 100 mmol/L (6.4 g/L). The reduction of Cu (II) to metallic copper was shown to proceed as two successive single-electron transfer reactions involving an intermediate chemical step where the cuprous ion (Cu+) was complexed by chloride to form the dichlorocuprous anion (CuCl-). In addition, interference effect was also investigated when Fe3+existed in the media, which was the common situation in the copper bioleaching system. The results showed no interference effect once the concentration of Fe3+was less than 100 mmol/L (5.6 g/L).