The study of adsorption of arsenate and arsenite by hydrous ceric oxide in aquatic conditions

本文从稀土材料的充分利用以及高效除砷吸附材料开发与应用的角度出发，系统的研究了稀土材料水合氧化铈对As(Ⅲ)和As(Ⅴ)的基本吸附性能和反应机理，确定了解吸的最佳条件，并初步探讨了再生吸附效果及动态柱状试验。研究结果表明：水合氧化铈在较宽的pH值范围(4.0～9.0)内对As(Ⅲ)和As(Ⅴ)均表现出较强的吸附能力，其吸附容量都能达到110mg/g以上。水合氧化铈吸附As(Ⅲ)的最佳pH值范围为中性偏碱，吸附As(Ⅴ)的最佳pH值范围为弱酸性。无论As(Ⅲ)还是As(Ⅴ)，在开始阶段吸附速率非常快,随着时间的延长逐渐达到平衡。水合氧化铈对于As(Ⅲ)与As(Ⅴ)的吸附可以很好地用Langmui...In view of taking full advantage of rare earth materials and development and utilization of high effective arsenic adsorption material, this research had studied the adsorption/desorption of arsenate and arsenite onto hydrous ceric oxide (HCO). And the adsorption mechanisms were also investigated.It was found that the adsorption capacity of HCO absorbent was constant around a value of 110mg/L over...学位：工学硕士院系专业：海洋与环境学院环境科学与工程系_环境工程学号：2005130223

Adsorption Characteristics of Arsenic in Water by Cerous Hydroxide

研究了氢氧化铈对水中砷的吸附特性,结果表明:氢氧化铈对As(Ⅲ)和As(Ⅴ)均有良好的吸附效果,其吸附等温线能很好地用Langmuir方程描述。酸性条件下有利于As(Ⅴ)的吸收,而中性/微碱性条件下有利于As(Ⅲ)的吸收。氢氧化铈粉末粒径及共存离子对吸附效果影响甚微,通过TCLP测试可知吸附后的粉末对环境无二次污染。The adsorption characteristics of arsenic in water by cerous hydroxide were studied.The results showed that cerous hydroxide had well adsorption effect for trivalent arsenic and pentavalent arsenic.The adsorption isotherms fitted very well for Langmuir equation.It was more suitable to adsorb pentavalent arsenic in an acidic condition,whereas adsorb trivalent arsenic in neutrality/slightly alkaline conditions.The adsorption effect of particle diameter and the coexisted ions of cerous hydroxide were feeble.The powder after adsorption did not have secondary pollution to environment by TCLP test.福建省自然科学基金计划项目(D0510005

Content and partitioning and study on removal technology of heavy metals in tentative dredged sediments of Xiamen western harbor

着重研究了厦门西海域拟疏浚物中重金属的含量和赋存形态,探讨了化学试剂浸提和曝气法去除重金属的可行性,为建立后续的去污染方案提供科学依据。厦门西海域拟疏浚物枯洪两季沉积物中重金属含量变化不大,枯季稍高于洪季。从经济角度考虑,选用C2H2O4、(nH4)2C2O4、EdTA作为浸提剂结合曝气和TClP翻转实验对厦门西海域代表性拟疏浚物样品(X5站位)进行了重金属去除试验。结果表明,几种溶剂中,C2H2O4的效果最好;在相同溶剂条件下,对多数重金属元素,曝气处理可以有效地提高去除率。Total content and partition of heavy metals in the tentative dredged sediments of Xiamen western harbor were studied with the aim to development of conventional decontamination technology.The chemical extraction repair heavy metals polluted soil used the chemical medicament to exchange hydronium,dissolve(in acid or alkali) and complexation.The variety of content of heavy metals in Xiamen western harbor is not evident between dry season and rain season,content of heavy metals in dry season is comparatively higher.This experiment consider from economical,choose ammonium oxalate,oxalic acid and EDTA as the chemical medicament,combining aeration and TCLP upturning,carry though attempt on removing the heavy metals of X5 sample station of Xiamen western harbor.The results showed that the effect of oxalic acid is the best of several chemical medicaments.Using the same chemical medicament,remove the heavy metals much more effective with aeration for most heavy metals

Y型聚乙二醇干扰素琢-2b注射液治疗HCV基因2/3型慢性丙型肝炎患者疗效和安全性的多中心随机对照试验研究

目的以标准剂量的聚乙二醇干扰素(Peg IFN)α-2a联合利巴韦林作为阳性对照,评价新型试验药物Y型Peg IFNα-2b注射液联合利巴韦林治疗2型/3型慢性丙型肝炎(CHC)患者的疗效和安全性。方法采用多中心、随机开放、阳性药对照的Ⅲ期临床试验,筛选符合要求的2型/3型CHC患者,按照2:1的比例随机分配到Y型Peg IFNα-2b组和Peg IFNα-2a组,同时口服利巴韦林,疗程24 w,停药随访24 w。采用Abbott Real Time HCV Genotype II检测HCV基因型,采用Cobas Taq Man实时定量PCR法检测血清HCV RNA水平。详细记录不良事件。主要疗效指标为持续病毒学应答(SVR),并进行非劣效检验。结果本试验实际入组2型/3型CHC患者255例,实际治疗241例。全分析集(FAS)数据显示,158例试验组和83例对照组患者SVR分别为85.4%(95%CI 79.94%~90.94%)和79.5%(95%CI 70.84%~88.20%,P=0.2402);对符合方案分析集(PPS)人群分析显示,试验组和对照组患者SVR分别为87.9%(95%CI 82.45%~93.27%)和85.9%(95%CI 77.82%~94.01%,P=0.7060),率差的95%可置信区间均符合非劣效标准;对PPS人群分析显示,85.8%受试者获得了早期病毒学应答(RVR),RVR的阳性预测值为90.1%;试验组和对照组不良事件发生率相似,分别为95.6%和95.2%,严重不良事件发生率分别为3.8%和3.6%。结论应用Peg IFNα联合利巴韦林治疗2型/3型CHC患者,新型试验药物Y型Peg IFNα-2b具有与对照药物Peg IFNα-2a相似的疗效和安全性。国家科技部“十二五”重大专项(编号:2012ZX10002-003)；“重大新药创制”十二五科技重大专项(编号:2012ZX09303019)

大學生網路健康資訊使用經驗之初探——健康素養的觀點

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REGENERATE DOMESTIC WASTEWATER TO CITY GREEN LAND

采用生活污水为水源,经过混凝、过滤强化一级处理制得再生水,浇灌模拟城市绿化草地。经过近6个月的试验,结果表明:草地对混凝过滤处理后的再生水中的污染物有很强的处理能力,对COD、氨氮和无机磷的平均去除率分别达到69.2%、99%、87.5%。同样土壤层厚度条件下,污水浇灌和自来水浇灌的草地出水的硝酸盐含量相当,符合淋洗规律,并没有受浇灌水中氮素的影响。生活污水中含有的少量营养元素(如氮、磷)促进植物的生长。因此采用此方法制得的水浇灌绿地是可行的。Irrigate lawn with domestic wastewater was treated by the way of coagulation-filtration. The result of experiment for nearly six months showed that: the lawn has the strong ability to remove the pollutant in sewage. Its COD, ammonia nitrogen and inorganic phosphorus removing rate achieves 69.2%, 97%, 87.5% in average. The concentration of nitrate in extravasate increases with the thickness of soil increasing. There was not evident difference between lawn extravasate irrigated with tap water and treated domestic wastewater under the condition of same soil thickness. Nitrate in treated domestic wastewater has little influence on the concentration of nitrate of extravasate. Some nutrition like N、P contained in sewage promote the growth of lawn. Therefore, it is feasible to irrigate lawn with domestic wastewater treated by this way

第四次臺海危機之後-臺印兩國對中國威脅感知的媒體輿論分析

台灣政治學會(TPSA); 國立中山大學政治學研究所(NSYSU-IPS)補正完畢國內高雄市，台灣TW