Using of Wet Process to Remove of Heavy Metals from Waste Incineration Fly Ash

以福建和湖北垃圾焚烧发电厂采集的飞灰为研究对象,比较了单独水洗、水洗结合酸洗等工艺对飞灰重金属的洗脱效果,考察了不同酸洗工艺条件下飞灰重金属浸出毒性的变化。结果表明:在水灰比为10时水洗效果最佳,水洗结合酸洗处理可有效降低飞灰重金属浸出毒性,部分飞灰经湿法脱除后可作为普通废物排放。Taking the fly ash samples obtained from Fujian and Hubei waste incineration plants as the research subjects,the effects of water washing and wash+acid washing for heavy metal extraction from fly ash were compared.The changes of leachimg toxicity of heavy metals from fly ash were investigated under different acid washing conditions.The results showed that the effect of water washing was best when the ratio of water to fly ash was 10 ∶ 1(L/kg).Water+acid washing process can effectively reduce the leachimg toxicity of heavy metals.Part of fly ash can be disposed as ordinary waste after treated by wetextraction process

Observation on Aggregation and Resting on Spider Web Behavior of Crane Fly Limonia(Euglochina) sp.from Nanjing Subtropical Rainforest of China

通讯作者: [email protected][中文文摘]在南靖和溪亚热带雨林中分布有数种大蚊,美刺亮大蚊(Lim onia(Euglochina)sp.)是雨林中唯一观察到在圆蛛科蜘蛛网上栖息的大蚊.因此我们对美刺亮大蚊和圆蛛科蜘蛛在蜘蛛网上的同现行为进行了观察研究.借助扫描电镜技术,在比较了其他大蚊、蜘蛛等节肢动物前跗节超微结构的基础上,对美刺亮大蚊栖息于蜘蛛网行为学的形态学机制进行了初步解析.文中也对美刺亮大蚊的聚集行为与雨林温湿度的关系进行了记录.[英文文摘]There are several species of crane flies in Nanjing subtropical rainforest,whereas,the Limonia(Euglochina) sp.is the only one we observed resting on the spider web(primary thread favor).So,observation on co-occurrence behavior of Limonia(Euglochina) sp.with the Araneidae spiders in the same orb-web was conducted.Ultrastructure of the pretarsus of several species of crane flies and one spider species of Araneidae were scanned by SEM technology,in addition,the mechanism of hanging on the orb-web thread by Limonia (Euglochina )sp.was discu ssed in this paper by comparing the tarsal externalmorpho logy of Limonia (Euglochina )sp.with the others. We also recorded the aggregation regulation of Limonia (Euglochina )sp.in the working field in the rainforest.国家基础科学人才培养基金(J0630649);厦门大学第一届大学生创新实验项目资

电化学微/纳米加工技术

通讯联系人，E-mail: dpzhan@ xmu． edu． cn介绍电化学微/纳米加工技术,特别是厦门大学电化学微/纳米加工课题组建立起来的约束刻蚀剂层技术,旨在让广大师生了解这一特种加工技术,共同促进我国电化学微/纳米加工技术的研究及产业化进程。国家自然科学基金(No.91023006,91023047,91023043);中央高校基本科研业务费专项资金(No.2010121022

Crosshole Seismic Tomographic Inversion Using Combined Direct and Reflected Traveltimes

提出一种井间地震直达波和反射波走时联合层析反演方法。建立了基于不规则单元的地层和界面完全耦合的三维井间离散模型,并在垂直于连井截面方向上假设模型参数不变;以直达波走时和反射波走时为观测数据,地层单元节点上的慢度和反射界面节点上的深度为模型参数,并考虑平滑约束和先验约束等,建立了线性迭代联合层析反演方程。理论模型合成资料和实测资料的应用结果表明,联合层析反演能同时发挥直达波和反射波各自的优势,不但可以确定反射界面,而且能提高地层速度的分辨率和可靠性。A method for crosshole seismic tomographic inversion using combined direct and reflected traveltimes is proposed in this paper.The 3-D crosshole model is represented as a set of layers separated by the interfaces,across which the velocity may be discontinuous.Each layer is discretized by irregular hexahedral and/or tetrahedral cells and each interface is discretized by inclined planes,which are perpendicular to the crosshole section.The discrete layers couple entirely with the discrete interfaces.The model parameters are assumed to be constant in the direction vertical to the crosshole section.Both velocities at layer nodes and depths at interface nodes are simultaneously inverted using a combination of direct and reflected arrival data.The inversion process seeks a minimum-structure model that is able to explain the given traveltime data satisfactorily by inverting to minimize data misfit and model roughness norms simultaneously.The nonlinear traveltime inversion is achieved using an iterative linearized approach.The applications of this method to synthetic and real data demonstrate that the combined direct and reflected traveltime tomographic inversion can obtain more accurate medium velocity and interface depth with a higher resolution than the direct traveltime inversion.国家自然科学基金项目(41074077;41230318)资