环境工程学报
環境工程學報
배경공정학보
CHINESE JOURNAL OF ENVIRONMENTAL ENGINEERING
2010年
4期
813-816
,共4页
4A沸石%废水%吸附%Pb~(2+)
4A沸石%廢水%吸附%Pb~(2+)
4A비석%폐수%흡부%Pb~(2+)
zeolite 4A%wastewater%adsorption%lead ion
在静态条件下,研究了4A沸石对废水中Pb~(2+)的吸附性能,并探讨了影响吸附的因素.实验表明:当温度为30℃,废水pH为5～6,0.0194A沸石对100 mg/L Pb~(2+)溶液10 mL吸附20 min,Pb~(2+)的去除率可达到99%以上.在实验研究条件下,4A沸石对Pb~(2+)的吸附符合Langmuir和Freundlich等温吸附方程,相关系数为0.9819和0.9998.经计算,4A沸石对Pb~(2+)的饱和吸附量为125 mg/g.4A沸石吸附水中Pb~(2+),达到吸附平衡的时间较短;溶液pH值的变化对吸附效果影响不显著;温度从室温略微升高,Pb~(2+)的去除率略有增大.吸附在4 A沸石上的Pb~(2+)可回收利用,处理后的4A沸石可以再生,且重复使用性能较好.
在靜態條件下,研究瞭4A沸石對廢水中Pb~(2+)的吸附性能,併探討瞭影響吸附的因素.實驗錶明:噹溫度為30℃,廢水pH為5～6,0.0194A沸石對100 mg/L Pb~(2+)溶液10 mL吸附20 min,Pb~(2+)的去除率可達到99%以上.在實驗研究條件下,4A沸石對Pb~(2+)的吸附符閤Langmuir和Freundlich等溫吸附方程,相關繫數為0.9819和0.9998.經計算,4A沸石對Pb~(2+)的飽和吸附量為125 mg/g.4A沸石吸附水中Pb~(2+),達到吸附平衡的時間較短;溶液pH值的變化對吸附效果影響不顯著;溫度從室溫略微升高,Pb~(2+)的去除率略有增大.吸附在4 A沸石上的Pb~(2+)可迴收利用,處理後的4A沸石可以再生,且重複使用性能較好.
재정태조건하,연구료4A비석대폐수중Pb~(2+)적흡부성능,병탐토료영향흡부적인소.실험표명:당온도위30℃,폐수pH위5～6,0.0194A비석대100 mg/L Pb~(2+)용액10 mL흡부20 min,Pb~(2+)적거제솔가체도99%이상.재실험연구조건하,4A비석대Pb~(2+)적흡부부합Langmuir화Freundlich등온흡부방정,상관계수위0.9819화0.9998.경계산,4A비석대Pb~(2+)적포화흡부량위125 mg/g.4A비석흡부수중Pb~(2+),체도흡부평형적시간교단;용액pH치적변화대흡부효과영향불현저;온도종실온략미승고,Pb~(2+)적거제솔략유증대.흡부재4 A비석상적Pb~(2+)가회수이용,처리후적4A비석가이재생,차중복사용성능교호.
Under static state, the Pb~(2+) in aqueous solution adsorption on zeolite 4A was studied. The results showed that the removal rate of Pb~(2+) in aqueous solution was up to 99% after 20 min at 30℃ when a 5 ～6 pH 10 mL aqueous solution of Pb~(2+) (100 mg/L) was adsorbed by 0. 01 g zeolite 4A. The isothermal adsorption of zeolite 4A for Pb~(2+) fit Langmuir equation and Freundlich equation under the condition of experimental concentration. The correlation coefficient was 0. 9819 and 0. 9998. The maximum adsorption capacity of zeolite 4A toward Pb~(2+) was 125 mg/g by calculation. It took a short period of time to reach the adsorption equilibrium. The pH value had no prominent effect on the removal rate of Pb~(2+). The removal rate of Pb~(2+) was increased less as temperature increased in the specified scope. It was able to regenerate zeolite 4A and recover Pb~(2+).
