CAJ | 학술논문

研究溶液 pH 值、Cu2+初始浓度、吸附时间、吸附剂投加量及温度对中药渣和麦麸吸附模拟矿山酸性废水中较高浓度Cu2+的影响。结果表明，随pH值的升高中药渣和麦麸对Cu2+的吸附量均增大；吸附剂最佳投加量为10 g/L；吸附过程更好地符合拟二级动力学模型；在pH值为3时，二者的最大吸附量分别为14.03和7.34 mg/g，吸附平衡符合Langmuir等温线方程；热力学研究表明，二者对Cu2+的吸附为非自发的放热反应。Zeta电位显示中药渣和麦麸在水溶液中均带负电，能够以静电引力吸附Cu2+；红外光谱分析表明，中药渣吸附Cu2+的官能团主要为羟基、羧基、酰胺基和酯基等，而麦麸吸附Cu2+的主要官能团为羟基、酰胺基和硅氧基等。
연구용액 pH 치、Cu2+초시농도、흡부시간、흡부제투가량급온도대중약사화맥부흡부모의광산산성폐수중교고농도Cu2+적영향。결과표명，수pH치적승고중약사화맥부대Cu2+적흡부량균증대；흡부제최가투가량위10 g/L；흡부과정경호지부합의이급동역학모형；재pH치위3시，이자적최대흡부량분별위14.03화7.34 mg/g，흡부평형부합Langmuir등온선방정；열역학연구표명，이자대Cu2+적흡부위비자발적방열반응。Zeta전위현시중약사화맥부재수용액중균대부전，능구이정전인력흡부Cu2+；홍외광보분석표명，중약사흡부Cu2+적관능단주요위간기、최기、선알기화지기등，이맥부흡부Cu2+적주요관능단위간기、선알기화규양기등。
Effective parameters including solution pH, initial Cu2+concentration, contact time, mass of adsorbents and temperature were studied to assess the biosorption of high Cu2+ions from simulated acid mine drainage by herb-medicine residues and wheat bran. The results show that biosorption capacities of both of them increase with the raising solution pH? the addition of adsorbents is optimized to be 10 g/L? pseudo-second-order model is more suitable for biosorption processes. The maximum biosorption capacities are 14.03 and 7.34 mg/g, respectively at solution pH value of 3?Langmuir model is observed to fit well. Thermodynamics analysis indicates that biosorption processes of herb-medicine residues and wheat bran are exothermic and unspontaneous. By means of Zeta potentials, it is found that both herb-medicine residues and wheat bran bear negative charges in solution, which can adsorb Cu2+by electrostatic pull. For FT-IR spectrum, the results indicate that the functional groups of herb-medicine residues are hydroxyl, carboxyl, amide and ester, while the functional groups of wheat bran are hydroxyl, amide and silicon-oxygen groups.