利用粉煤灰合成Linde type F(K)沸石吸附重金属Ni2+,探讨吸附剂用量、初始pH、反应温度以及反应时间对Ni2+吸附效果的影响,同时进行吸附等温线和吸附动力学的数据模拟。结果表明,沸石投加量、初始pH以及反应温度均对Ni2+的去除效果影响...利用粉煤灰合成Linde type F(K)沸石吸附重金属Ni2+,探讨吸附剂用量、初始pH、反应温度以及反应时间对Ni2+吸附效果的影响,同时进行吸附等温线和吸附动力学的数据模拟。结果表明,沸石投加量、初始pH以及反应温度均对Ni2+的去除效果影响明显。随着沸石投加量的不断增大,Ni2+去除率不断提高,饱和吸附量逐渐减小。初始pH 7是沸石吸附Ni2+的最适pH。反应温度越高,沸石吸附Ni2+达到平衡的时间越短。沸石对Ni2+的吸附过程符合Langmuir吸附等温式;准一级动力学方程能较好地描述沸石对Ni2+的吸附行为。展开更多
利用粉煤灰合成了Linde type F(K)沸石吸附重金属Cd2+,考察了吸附剂量、初始pH值、反应温度以及反应时间对Cd2+吸附效果的影响,同时进行了吸附动力学数据模拟。结果表明:吸附剂量、初始pH值、反应温度以及反应时间均对Cd2+的去除率影响...利用粉煤灰合成了Linde type F(K)沸石吸附重金属Cd2+,考察了吸附剂量、初始pH值、反应温度以及反应时间对Cd2+吸附效果的影响,同时进行了吸附动力学数据模拟。结果表明:吸附剂量、初始pH值、反应温度以及反应时间均对Cd2+的去除率影响显著。随着吸附剂投加量的不断增大,Cd2+去除效果不断提高,饱和吸附量逐渐减小。初始pH值为7时沸石吸附Cd2+的去除率为100%。反应温度越高,沸石吸附Cd2+达到平衡的时间越短。Linde type F(K)沸石对Cd2+的吸附行为符合准二级反应动力学方程。展开更多
The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of man...The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of manufacture and installation. A numerical study was presented on the dynamic responses of K-type and inverted-K-type jacket support structures subjected to different kinds of dynamic load. The results show that the inverted-K-type jacket structure has higher natural frequencies than the K-type. The wave force spectrum response shows that the maximum displacement of the K-type jacket structure is larger than that of the inverted-K-type. The time-history responses under wind and wave-current load indicate that the inverted-K-type jacket structure shows smaller displacement and stress compared with the K-type, and presents different stress concentration phenomena. The dynamic responses reveal that the inverted-K-type of jacket support structure has greater stiffness and superior mechanical properties, and thus is more applicable in the offshore area with relatively deep water.展开更多
文摘利用粉煤灰合成Linde type F(K)沸石吸附重金属Ni2+,探讨吸附剂用量、初始pH、反应温度以及反应时间对Ni2+吸附效果的影响,同时进行吸附等温线和吸附动力学的数据模拟。结果表明,沸石投加量、初始pH以及反应温度均对Ni2+的去除效果影响明显。随着沸石投加量的不断增大,Ni2+去除率不断提高,饱和吸附量逐渐减小。初始pH 7是沸石吸附Ni2+的最适pH。反应温度越高,沸石吸附Ni2+达到平衡的时间越短。沸石对Ni2+的吸附过程符合Langmuir吸附等温式;准一级动力学方程能较好地描述沸石对Ni2+的吸附行为。
文摘利用粉煤灰合成了Linde type F(K)沸石吸附重金属Cd2+,考察了吸附剂量、初始pH值、反应温度以及反应时间对Cd2+吸附效果的影响,同时进行了吸附动力学数据模拟。结果表明:吸附剂量、初始pH值、反应温度以及反应时间均对Cd2+的去除率影响显著。随着吸附剂投加量的不断增大,Cd2+去除效果不断提高,饱和吸附量逐渐减小。初始pH值为7时沸石吸附Cd2+的去除率为100%。反应温度越高,沸石吸附Cd2+达到平衡的时间越短。Linde type F(K)沸石对Cd2+的吸附行为符合准二级反应动力学方程。
基金Project(51509081)supported by the National Natural Science Foundation of ChinaProject(B12032)supported by the “111 Project” of ChinaProjects(BK20150037,BK20150811)supported by the Natural Science Foundation of Jiangsu Province,China
文摘The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of manufacture and installation. A numerical study was presented on the dynamic responses of K-type and inverted-K-type jacket support structures subjected to different kinds of dynamic load. The results show that the inverted-K-type jacket structure has higher natural frequencies than the K-type. The wave force spectrum response shows that the maximum displacement of the K-type jacket structure is larger than that of the inverted-K-type. The time-history responses under wind and wave-current load indicate that the inverted-K-type jacket structure shows smaller displacement and stress compared with the K-type, and presents different stress concentration phenomena. The dynamic responses reveal that the inverted-K-type of jacket support structure has greater stiffness and superior mechanical properties, and thus is more applicable in the offshore area with relatively deep water.
