Physicochemical properties of chars at different treatment temperatures

In this study, the physicochemical properties of the char of Indonesian SM coal following heat treatment at various temperatures were evaluated using X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and morphological and specific surface area analysis. Based on these analyses, heat treatment of coal was determined to be the most effective in increasing the coal rank. In the XPS analysis, the C–O and C–O–C groups and quaternary-N species were found to be of a lower grade coal when the pretreatment temperature decreased, meanwhile the C–C group and pyridinic species increased. In the FT-IR analysis, the collapse of the C–O and C–O–C group was observed due to the collapse of the ether group. In SEM and Brunauer–Emmett–Teller (BET) analysis, a decrease in the ether group was shown to be accompanied with the formation of micropores.

Implications Recently, XPS analyses have been reported as coal surface analysis. Usually, they have reported the analysis of the coals with different rank. This study investigated the coal surface characteristics of the coals pretreated at different temperature using various analyses (BET, SEM, XPS, FT-IR), and this study can be the basis for other research and applications.     

稻壳基活性炭的制备及其对亚甲基蓝吸附的研究

以稻壳为原料,采用K2CO3活化法和H3P04活化法制备了比表面积为1312m^2／g和682m^2／g的活性炭,通过扫描电子显微镜（SEM）、X-射线衍射仪（XRD）对样品进行了表征,并将孔隙发达的活性炭样品用于对亚甲基蓝的吸附,结果表明,K2CO3活化法制备的活性炭样品具有更多的微孔结构;随着亚甲基蓝溶液初始浓度的增加、活性炭吸附时间的延长,亚甲基蓝的去除率呈现逐渐降低和逐渐增大的变化规律,当pH值为6时,活性炭对亚甲基蓝的吸附效果最佳;稻壳基活性炭对亚甲基蓝的吸附等温线符合Langmuir模型,Qm最高可达476．2mg／g;热力学参数△G^0△H^0和△S^0均为负值,表明稻壳基活性炭对亚甲基蓝的吸附是一个自发的放热反应。     

Assessment and distribution of antimony in soils around three coal mines, Anhui, China

Thirty-three soil samples were collected from the Luling, Liuer, and Zhangji coal mines in the Huaibei and Huainan areas of Anhui Province, China. The samples were analyzed for antimony (Sb) by inductively coupled plasma-optical emission spectrometry (ICP-OES) method. The average Sb content in the 33 samples was 4 mg kg(-1), which is lower than in coals from this region (6.2 mg kg(-1)). More than 75% of the soils sampled showed a significant degree of Sb pollution (enrichment factors [EFs] 5-20). The soils collected near the gob pile and coal preparation plant were higher in Sb content than those collected from residential areas near the mines. The gob pile and tailings from the preparation plant were high in mineral matter content and high in Sb. They are the sources of Sb pollution in surface soils in the vicinity of coal mines. The spatial dispersion of Sb in surface soil in the mine region shows that Sb pollution could reach out as far as 350 m into the local environment conditions. Crops in rice paddies may adsorb some Sb and reduce the Sb content in soils from paddyfields. Vertical distribution of Sb in two soil profiles indicates that Sb is normally relatively immobile in soils.     

人工泳池水质的模糊综合评判及分析

用模糊数学方法 ,处理人工泳池水质监测数据 ,综合评判泳池水质状况 ,分析水质参数间关系 ,探讨了该方法应用的可能性     

钢材混酸酸洗中NO_x与酸雾综合治理技术的研究与应用

采用硝酸与其它酸的混合酸对特殊钢进行表面处理时，会产生大量的ＮＯｘ和其它挥发性酸雾，是冶金企业的主要污染源之一。在金属酸洗过程中以投加化学抑制剂的方法控制ＮＯｘ污染，同时以水洗涤、吸收的方法治理其它挥发性酸雾，是治理这种污染的行之有效的综合治理技术。本文简要介绍了化学抑制法控制ＮＯｘ的基本原理，模拟试验的方法以及综合治理技术在工程中应用情况，以供参考。     

PTA污水处理装置存在问题及对策

针对洛阳石化PTA污水处理装置存在的主要问题，通过分析，提出了相应对策，优化了生产操作，提高了装置的处理水平，保证了污水的达标排放。     

中国未来氟氯化碳(CFC)的生产和消费变化趋势

本文首先分析了中国履行《蒙特利尔议定书》控制CFC的生产和消费的履约目标，回顾了中国历史上CFC的生产和消费，最后提出了中国未来CFC的生产和各相关行业的消费计划。中国将在2010年前淘汰CFC生产和消费，2005-2010年间预计生产CFC共52450t ODP，消费48320t；2005-2010年期间，生产和消费计划量分别从《议定节》限定的目标低15744吨和35700t，现有CFC生产和消费淘汰计划相对安全，而替代品的发展将是保障CFC淘汰目标实现的关键之一。     

复合垂直流人工湿地微生物特征对典型污水的响应差异

污水性质是影响人工湿地微生物特征的重要因子,而微生物对人工湿地污染物净化功能的发挥至关重要. 运用两组IVCW(复合垂直流人工湿地)分别处理模拟生活污水和污水处理厂尾水,比较研究两组系统下行流、上行流池的基质酶活性及硝化反硝化强度,并通过脂肪酸甲酯图谱分析系统中的微生物群落结构,以解析人工湿地微生物特征对两种污水的响应差异. 结果表明:处理生活污水的IVCW下行流池中脱氢酶、过氧化氢酶、脲酶及硝酸盐还原酶活性均显著高于其他单元,四者平均值分别为其他单元的2.8~4.6、7.9~10.3、19.3~41.7和4.5~10.8倍. 处理生活污水IVCW基质的硝化强度是尾水处理系统对应单元的1.4~5.3倍(下行流)和1.3~3.9倍(上行流),而两组IVCW对应单元基质的反硝化强度之间无显著差异. IVCW下行流池中特征脂肪酸比值及微生物群落结构受污水类型的影响较小,均以厌氧细菌和革兰氏阳性菌为优势菌;上行流池微生物群落结构则受到污水类型的一定影响,真菌的相对丰度较高. 两种污水对IVCW基质酶活性和硝化强度的影响高于对反硝化强度和微生物群落结构的影响.      

上海市农村富营养化河道生态修复工程研究

用食藻虫引导沉水植物生态修复工程技术对上海市临港新城果园镇里塘河道富营养化水体进行了工程治理和生态修复,辅以种植沉水植物,采取开放式生态修复和治理。每月水质跟踪检测结果表明:该工程治理方法具有显著生态修复效果,水质得到明显改善;COD_Mn、TN、TP在最低平均值时分别比生态修复前下降了60.67%、85.36%、88.74%;氨氮、亚硝态氮和叶绿素a在生态修复中的最低平均值分别为0.088 mg/L、0.024 mg/L和5.31 mg/m³;试验期间,修复区水体TN、TP、NO₂-N、NH₄-N和COD_Mn显著低于对照区,水体透明度（SD）平均为150～180 cm,水质达到国家Ⅱ～Ⅲ类地表水水质标准。     

基于卫星遥感数据(AOD)估算PM2.5的研究进展

雾霾天气的频繁出现,不断向人们警示中国大气环境污染的严重性.细颗粒物PM2.5作为空气质量评价指标之一,由于粒径小、为有毒性物质提供载体的特性,对人们的健康和生活产生很大的负面影响.近年来,PM2.5的相关研究引起了世界各国研究者的广泛关注,通过地基手段获得PM2.5质量浓度受到环境、地理等因素的限制,而利用卫星遥感技术估算地面PM2.5质量浓度,覆盖面广、估算精度可靠,对环境污染监测和治理具有重要意义.在综合了国内外关于气溶胶光学厚度(AOD)估算PM2.5文献的基础上,对AOD和PM2.5的数据源和估算的方法及手段作了简要介绍,分析总结了AOD与PM2.5相关性与PM2.5遥感估算的模型,并展望了未来PM2.5研究的发展方向.