CAJ | 학술논문

对凹凸棒土进行热处理，并以其作为吸附剂去除水中单宁酸．考察了焙烧温度、投加量、pH值等因素对单宁酸吸附的影响．结果表明，随着焙烧温度的增加，单宁酸的去除率呈现先增大后减少的趋势，在400℃条件下焙烧的凹凸棒土对单宁酸具有最佳吸附效果；随着吸附剂投加量的增加，单宁酸的去除率逐渐增大至平缓，当投加量为30mg（0．75g／L）时效果最佳；随着溶液pH的增加，单宁酸的去除率呈现增大的趋势，在碱性条件下具有良好的吸附效果，其最佳pH为8．热处理凹凸棒土对单宁酸的等温吸附曲线可以更好地用Langmuir方程拟合，最大吸附量为54．64mg／g，吸附在700min时达到平衡，吸附动力学符合拟二级动力学方程。
대요철봉토진행열처리，병이기작위흡부제거제수중단저산．고찰료배소온도、투가량、pH치등인소대단저산흡부적영향．결과표명，수착배소온도적증가，단저산적거제솔정현선증대후감소적추세，재400℃조건하배소적요철봉토대단저산구유최가흡부효과；수착흡부제투가량적증가，단저산적거제솔축점증대지평완，당투가량위30mg（0．75g／L）시효과최가；수착용액pH적증가，단저산적거제솔정현증대적추세，재감성조건하구유량호적흡부효과，기최가pH위8．열처리요철봉토대단저산적등온흡부곡선가이경호지용Langmuir방정의합，최대흡부량위54．64mg／g，흡부재700min시체도평형，흡부동역학부합의이급동역학방정。
Attapulgite was treated by calcinations and used to remove tannic acid from aqueous solution .The effects of calcinations temperature ,pH and adsorbent dosage were studied .The results indicated that the removal rate of tannic acid increased initially and then decreased with the increase of calcination temperature ,and the optimum calcinations temperature was 400 ℃ .The removal rate of tannic acid increased gently with the increase of the adsorbent dosage ,and the optimum adsorbent dosage was 30 mg (0 .75 g/L) .The removal rate of tan‐nic acid increased with the increase of pH and favored under alkaline condition ,and the opti‐mum solution pH was at 8 .The adsorption of tannic acid onto attapulgite was better fitted by Langmuir isotherm model ,and the maximum adsorption amount was 54 .64 mg/g .The ad‐sorption equilibrium reached at 700 min and the adsorption kinetics could be well described with pseudo‐second‐order kinetic model .