切割刃料碳化硅的再生处理工艺研究

采用化学反应除杂和水力沉降粒度重新分级的方法,通过酸洗、碱洗、水力分级、pH值调节、干燥、配料等一系列处理工艺,对废砂浆中的碳化硅进行再生处理,得到的再生切割刃料各项性能指标满足切割工业使用要求,实现了资源再利用和循环发展.     

污染底泥掩蔽材料筛选综述

随着经济的高速发展,水体底泥污染已成为世界性的一个环境问题。掩蔽修复是一种修复效果明显,且工程造价较低的水体底泥修复技术,而掩蔽技术的关键在于掩蔽材料的选择。本文主要介绍了水泥、粉煤灰、沸石、方解石、铝盐等研究较为成熟的且具有应用前景的掩蔽材料,分析其各自的原理及优缺点。同时作者在文章中提出了一种新的掩蔽剂——净水厂改性污泥,对其的可行性进行了分析。并就掩蔽材料的选择的技术要求以及原则作出分析。     

甘孜州非物质文化遗产旅游开发对策

以国内外学者对非物质文化遗产的研究理论为依据,结合甘孜州非物质文化遗产实情、旅游现状,提出非物质文化遗产旅游开发的观念、“YON”评价指标、原则、基础设施建设、传承人利益保障体制和产品开发对策,为地区文化旅游事业的发展提供参考依据,对同质旅游区域具有一定的借鉴意义。     

非金属材料自然环境贮存特性数据库设计

针对型号单位长期利用专业环境试验机构各典型环境试验站开展自然环境试验,数据量大,数据类型多,数据分散,不能被设计师系统利用的实际情况,由五九所与北京电子工程技术研究所共同开发了非金属材料自然环境贮存特性数据库。数据库采用J2ee的技术架构进行开发,实现了对非金属材料自然环境贮存特性数据的有效管理、网络共享,为数据资源的系统积累和深层次利用奠定了基础。     

Trends of hazardous material accidents (HMAs) during highway transportation from 2013 to 2018 in China

Statistical analysis of hazardous material accidents (HMAs) in China from 20013 to 2018 related to characteristics and consequences is discussed in this study, revealing different time volatility, spatial distribution and accident consequence features. Yearly, monthly, weekly and hourly levels of HMAs are analysed, and the corresponding factors are discussed. The trends of HMAs are affected by different factors, such as efforts toward safety-specific rectification by the government, holidays, five-day workweek systems and daily traffic peaks. The spatial distribution trends indicate that highway transportation of hazardous materials is mostly short-distance transport. The accidents that occurred on normal road sections account for 82.76% of the total HMAs during transportation. Leaking accidents caused by HMAs account for 79.35% of the total accidents. Countermeasures focusing on improving highway transportation safety for hazardous materials are recommended.     

弱胶结软岩巷道高分子改性树脂注浆加固技术研究*

为解决弱胶结软岩胶结性差、力学强度低、遇水易软化带来的巷道围岩变形量大的问题,以王洼二矿为例,结合试验巷道围岩条件和注浆加固支护技术特点,提出高分子改性树脂注浆加固方案;并采用室内注浆加固体力学性能试验验证方案的可行性。结果表明:现场围岩单轴抗压强度平均值22.74 MPa、抗拉强度平均值0.674 MPa,高分子改性树脂注浆材料对围岩加固体单轴抗压强度影响不大,但加固体抗拉强度平均值3.07 MPa,相比原岩抗拉强度提高355.5%;现场试验顶板、两帮围岩变形量由之前的大变形逐渐控制在100 mm以内,注浆后30 d基本趋于稳定。研究结果对软岩巷道支护设计和施工具有一定的实际指导意义。     

抗生素废水的GC-MS分析与显色物质的初步确定

为确定抗生素废水中有机污染物构成和显色物质,以二氯甲烷为萃取剂,萃取废水中的有机物,经过浓缩纯化后,利用气相色谱质谱联用(GC-MS)技术对制药废水中的有机成分进行了分析鉴定,结合计算机质谱图库,定性确定了废水中60种有机污染物。其中,脂类为主要污染物成分,经对脱色后的废水进一步GC-MS分析后,初步确定油酸甲酯为此类抗生素废水的主要显色有机物。     

Monitoring the volume and lateral spread of disposed sediments by acoustic methods, Oslo Harbor, Norway

Acoustic equipment, including interferometric sonar and parametric sub-bottom profiler, have been used to determine the volume and lateral spread of dredged sediments disposed in the natural submarine depression in the Bekkelag Basin, inner Oslofjord since the beginning of the Oslo Harbor remediation project in 2006. This natural depression is used as a subaqueous confined disposal facility (CDF). Calculation of the volume of disposed sediments in the CDF is based on elevation change, derived from two high-resolution bathymetric datasets obtained in 2004, i.e. before the onset of the remediation project, and in April 2008. Seismic profiles across the CDF have been used to estimate the settlement of the original seabed, caused by loading-induced dewatering and compaction of the seabed sediments under the disposed masses.Detailed bathymetry and backscatter data demonstrate the lateral spread of disposed sediments within a well-confined area covering ca. 195,000 m². The sea bottom within this area is distinctly softer than the surrounding seabed as shown by very low acoustic backscatter amplitude, signifying a very loose surface character of the disposed sediments. The thickness of the disposed sediments reaches 6 m the deepest part of the original depression. The volume calculation of the disposed sediments in the CDF, based solely on bathymetry data, gives a value of ca. 310,000–320,000 m³. Settlement of the original seabed as a result of loading has been estimated to be 30 cm at 5 m thickness of the disposed sediments. Under the condition that the settlement rate is linearly correlated to the thickness of disposed sediments, the settlement corrected volume of disposed sediments is ca. 330,000–340,000 m³. Presented results demonstrate high accuracy and good reproducibility of acoustic seafloor data, and indicate a great potential of such methods as monitoring tools in environmental projects that involve dredging and subaqueous disposal.     

Immobilization of pentachlorophenol in soil using carbonaceous material amendments

In this study, three pentachlorophenol (PCP) laboratory-spiked and one field-contaminated soil were amended with 2.0% char, humic acid (HA) and peat, respectively. The amended soils were aged for either 7 or 250 days. After amendment, CaCl₂ extractability of PCP was significantly decreased. Desorption kinetics indicated that the proposed amendment could lead to a strong binding and slow desorption of PCP in soils. Amendment with char reduced the bioaccumulation factor (BAF) of PCP most significantly for earthworms (Eisenia fetida) in all soils studied. The results of both physicochemical and biological tests suggested that amendment reduced PCP bioavailability quickly and enduringly, implying that carbonaceous material amendment, especially char amendment, was a potentially attractive in situ remediation method for sequestration of PCP in contaminated soil.     

二恶英控制技术的研究现状及发展前景

分析了垃圾焚烧过程中产生的二恶英的危害以及目前世界各国对其控制处理技术的研究现状。重点讨论了二恶英新控制技术——催化分解二恶英滤料的功能特点。该技术具有对垃圾焚烧尾气中颗粒物的高效捕集和二恶英的高效分解的双重功效,并且为新型过滤材料的开发开辟了新途径。