天津科技大学学报
天津科技大學學報
천진과기대학학보
JOURNAL OF TIANJIN UNIVERSITY OF SCIENCE & TECHNOLOGY
2013年
1期
38-41
,共4页
王昶%张相龙%翟炎龙%郝庆兰
王昶%張相龍%翟炎龍%郝慶蘭
왕창%장상룡%적염룡%학경란
adsorbent%Rb8,Nb22,O59%Na+%K+%ion exchange
adsorbent%Rb8,Nb22,O59%Na+%K+%ion exchange
adsorbent%Rb8,Nb22,O59%Na+%K+%ion exchange
adsorbent%Rb8,Nb22,O59%Na+%K+%ion exchange
用浓度为10,mol/L HNO3对高温固相合成的 Rb8,Nb22,O59进行酸洗脱 Rb+,制得吸附剂 H8,Nb22,O59·8H2O,并对K+的交换性能进行研究,同时运用XRD和SEM进行表征.结果表明:H8,Nb22,O59·8H2O与Rb8,Nb22,O59具有相似的结构;H8,Nb22,O59·8H2O对于Na+和K+的饱和吸附量接近理论吸附量2.55,mmol/g,表明吸附剂对Na+和K+具有较高的亲和性;在pH为2~8的范围内,H8,Nb22,O59·8H2O对K+具有较高的分配系数,而分离因数随pH的升高而显著降低;H8,Nb22,O59·8H2O重复使用后对K+仍具有较高的吸附选择性.
用濃度為10,mol/L HNO3對高溫固相閤成的 Rb8,Nb22,O59進行痠洗脫 Rb+,製得吸附劑 H8,Nb22,O59·8H2O,併對K+的交換性能進行研究,同時運用XRD和SEM進行錶徵.結果錶明:H8,Nb22,O59·8H2O與Rb8,Nb22,O59具有相似的結構;H8,Nb22,O59·8H2O對于Na+和K+的飽和吸附量接近理論吸附量2.55,mmol/g,錶明吸附劑對Na+和K+具有較高的親和性;在pH為2~8的範圍內,H8,Nb22,O59·8H2O對K+具有較高的分配繫數,而分離因數隨pH的升高而顯著降低;H8,Nb22,O59·8H2O重複使用後對K+仍具有較高的吸附選擇性.
용농도위10,mol/L HNO3대고온고상합성적 Rb8,Nb22,O59진행산세탈 Rb+,제득흡부제 H8,Nb22,O59·8H2O,병대K+적교환성능진행연구,동시운용XRD화SEM진행표정.결과표명:H8,Nb22,O59·8H2O여Rb8,Nb22,O59구유상사적결구;H8,Nb22,O59·8H2O대우Na+화K+적포화흡부량접근이론흡부량2.55,mmol/g,표명흡부제대Na+화K+구유교고적친화성;재pH위2~8적범위내,H8,Nb22,O59·8H2O대K+구유교고적분배계수,이분리인수수pH적승고이현저강저;H8,Nb22,O59·8H2O중복사용후대K+잉구유교고적흡부선택성.
The adsorbent H8,Nb22,O59·8H2O was obtained through extracting Rb+from Rb8,Nb22,O59 in the 10 mol/L HNO3 solution,the K+exchange capacity of H8,Nb22,O59·8H2O was studied,and samples were characterized with XRD and SEM, respectively. The results indicate that the structure of H8,Nb22,O59·8H2O is similar with that of Rb8,Nb22,O59,and the saturated adsorption capacities of Na+and K+for H8,Nb22,O59·8H2O are close to the theoretical value of 2.55 mmol/g,suggesting that the adsorbent H8,Nb22,O59·8H2O has a higher affinity for Na+and K+. H8,Nb22,O59·8H2O shows markedly high selectivity for the adsorption of K+within the pH range from 2 to 8,but separation factor decreases with the increase of pH value,and re-used H8,Nb22,O59·8H2O still exhibits markedly high selectivity for the adsorption of K+.