农业资源与环境学报
農業資源與環境學報
농업자원여배경학보
Journal of Agricultural Resources and Environment
2015年
3期
250-256
,共7页
许育新%喻曼%陈喜靖%安文浩%王云龙%肖华%沈阿林
許育新%喻曼%陳喜靖%安文浩%王雲龍%肖華%瀋阿林
허육신%유만%진희정%안문호%왕운룡%초화%침아림
沸石%氨氮%吸附%等温吸附方程%穿透曲线
沸石%氨氮%吸附%等溫吸附方程%穿透麯線
비석%안담%흡부%등온흡부방정%천투곡선
zeolite%ammonia-nitrogen%adsorption%isothermal adsorption equation%breakthrough curve
以浙江缙云天然沸石为原料，分别用摇床和吸附柱实验研究了天然沸石对氨氮的静态和动态吸附特性。结果显示，在10、25、40℃温度下沸石吸附氨氮有显著差异（P＜0.05）。在25℃、氨氮初始浓度为50 mg·L-1的条件下，1~2 mm沸石对氨氮的360 min吸附容量为4.05±0.02 mg·g-1。沸石对氨氮的吸附过程遵循二级吸附动力学方程，沸石对氨氮的等温吸附可用Langmuir和Fre-undlich等温吸附方程拟合，相关性分析结果表明Langmuir方程达到极显著相关（P＜0.01），可以更好地描述沸石吸附氨氮的热力学过程。随着沸石粒径与投加量的减小，沸石对氨氮的吸附量显著增加。在pH值6.0~8.0时，沸石对氨氮去除效果最好。动态试验显示，当氨氮浓度为50 mg·L-1时，沸石的穿透时间约96 h，动态饱和吸附量为18.8 mg·g-1。
以浙江縉雲天然沸石為原料，分彆用搖床和吸附柱實驗研究瞭天然沸石對氨氮的靜態和動態吸附特性。結果顯示，在10、25、40℃溫度下沸石吸附氨氮有顯著差異（P＜0.05）。在25℃、氨氮初始濃度為50 mg·L-1的條件下，1~2 mm沸石對氨氮的360 min吸附容量為4.05±0.02 mg·g-1。沸石對氨氮的吸附過程遵循二級吸附動力學方程，沸石對氨氮的等溫吸附可用Langmuir和Fre-undlich等溫吸附方程擬閤，相關性分析結果錶明Langmuir方程達到極顯著相關（P＜0.01），可以更好地描述沸石吸附氨氮的熱力學過程。隨著沸石粒徑與投加量的減小，沸石對氨氮的吸附量顯著增加。在pH值6.0~8.0時，沸石對氨氮去除效果最好。動態試驗顯示，噹氨氮濃度為50 mg·L-1時，沸石的穿透時間約96 h，動態飽和吸附量為18.8 mg·g-1。
이절강진운천연비석위원료，분별용요상화흡부주실험연구료천연비석대안담적정태화동태흡부특성。결과현시，재10、25、40℃온도하비석흡부안담유현저차이（P＜0.05）。재25℃、안담초시농도위50 mg·L-1적조건하，1~2 mm비석대안담적360 min흡부용량위4.05±0.02 mg·g-1。비석대안담적흡부과정준순이급흡부동역학방정，비석대안담적등온흡부가용Langmuir화Fre-undlich등온흡부방정의합，상관성분석결과표명Langmuir방정체도겁현저상관（P＜0.01），가이경호지묘술비석흡부안담적열역학과정。수착비석립경여투가량적감소，비석대안담적흡부량현저증가。재pH치6.0~8.0시，비석대안담거제효과최호。동태시험현시，당안담농도위50 mg·L-1시，비석적천투시간약96 h，동태포화흡부량위18.8 mg·g-1。
Taking Zhejiang Jinyun natural zeolite as raw material, the static and dynamic characteristics of ammonia nitrogen adsorption were studied by shaking table and column experiment, respectively. Results showed that ammonia nitrogen adsorption by zeolite was significant difference(P<0.05)at 10, 25, 40℃. At initial ammonia nitrogen concentration of 50 mg·L-1, the adsorption capacity of 1~2 mm zeolite to am-monia nitrogen was 4.05±0.02 mg·g-1 at 25℃within 360 min. Adsorption process of ammonia nitrogen on natural zeolite followed two stage adsorption kinetics equation. Isothermal adsorption of ammonia nitrogen by zeolite could be fitted by both the Langmuir and Freundlich isother-mal adsorption equation, and the correlation analysis of Langmuir equation was significant correlation(P<0.01), which could better describe the thermodynamic process of the ammonia nitrogen adsorption on zeolite. With reducing particle size and dosage of zeolite, adsorption ca-pacity of zeolite to ammonia nitrogen increased significantly. The optimum adsorption capacity of ammonium was obtained at pH value in the range of 6.0~8.0. Dynamic tests showed when the ammonia nitrogen concentration was 50 mg·L-1, zeolite of breakthrough time was about 96 h, the saturated adsorption capacity was 18.8 mg·g-1.
