刺猬肉的营养成分及其品质评价

本文对野生动物刺猬的肉质营养成分及其品质进行了理化与感官检验。结果表明,刺猬肉的感官指标良好,其品质与营养成分可与常用动物媲美;油脂与常用动植物油脂相比,脂肪酸不饱和程度明显高于动物油脂,与多种植物油相当     

农作物秸秆资源的综合利用

本文对农作物秸秆的产量、开发利用现状、设备及存在的问题等方面进行了分析研究,并对秸秆的综合利用作了初步的探讨     

推进城乡一体化统筹经济和环境协调发展

论述了加速城乡一体化建设过程中,加强环境保护工作的紧迫性;提出了以优美乡镇创建为抓手,生态县(市)、生态省建设为载体,整体推进环境保护工作,从而推动城乡一体化进程。     

关于在环境影响评价过程中开展公众参与的思考

通过对不同形式公众参与优缺点的分析,提出今后有效开展公众参与的建议,旨在探讨《中华人民共和国环境影响评价法》实施后,中国应如何开展环境影响评价中的公众参与。     

电解对氯苯酚稀水溶液中脱氯降解机理研究

利用石墨电极进行了多种条件下对氯苯酚水溶液的电解研究。研究结果表明,CODCr去除率和脱氯率随电压的升高呈先升高后下降的趋势、随对氯苯酚质量浓度的升高呈指数下降、随溶液pH的升高而升高。碱性条件下电解效果明显优于中性和酸性条件。在电压为10V,pH≈12,电解100mg L的对氯苯酚溶液2h后,CODCr去除率可达52 94%,脱氯率达52 8%。由脉冲辐解瞬态吸收光谱可知,中性、酸性条件下降解机制均为OH·自由基的作用,经过瞬态分子OH-adducts(OH加合物)的中间产物进一步氧化降解;碱性条件下通过OH·自由基和对氯苯酚氧基负离子的阳极直接失电子氧化作用2种降解机制,经过瞬态分子氯代酚氧自由基中间产物氧化降解对氯苯酚,产物分析结果显示生成了对苯二酚和苯醌等中间产物。      

深井动压影响下山煤巷围岩变形机理与控制研究

以刘桥一矿Ⅱ66回风下山为工程背景,采用现场实测、实验室实验、数值模拟和工业性试验综合分析了下山煤巷非对称变形破坏机理,提出动压影响下深井软弱煤巷围岩多层次组合控制理论,并给出优化控制措施。研究表明:回风下山变形失稳严重并呈非对称性,围岩完整性较差,强度低。地应力实测显示,回风下山处于高原岩应力区,最大主应力为水平应力且具有明显方向性,与巷道轴线夹角为71°,断面顶底板剪切破坏风险较大;数值模拟显示,回风下山开拓延伸期间,受邻近轨道下山、辅助下山影响显著,4煤回采对其影响较小,6煤工作面回采是下山煤巷非对称失稳的主要诱因;提出以围岩深浅孔注浆为核心,以新型注浆锚索、锚杆为装备基础的高阻让压全断面组合控制理论,并给出具体优化方案。工业性试验显示,下山煤巷围岩变形得到有效控制。     

Mechanism of complexation of toxic arsenate,selenate, and molybdate with hydrotalcites

Environmental Chemistry Letters - Wastewater from the uranium mining industry contains toxic arsenate (AsO43–), selenate (SeO42–), and molybdate (MoO42–) that can be removed by...     

Conversion of waste plastics into value-added carbon materials

Plastic pollution is a major environmental issue worldwide, calling for advanced methods to recycle waste plastics in the context of the circular economy. Here we review methods and strategies to convert waste plastics into value-added carbon materials, with focus on sources, properties, pretreatment of waste plastics, and on preparation of carbon materials. Pretreatment techniques include mechanical crushing, plastic stabilization and electrospinning. Carbon materials such as carbon nanotubes, graphene, carbon nanosheets, carbon spheres and porous carbon are prepared by oxygen-limited carbonization, catalytic carbonization, the template-based method, and pressure carbonization. We emphasize the conversion of polyethene terephthalate, polyethylene, polypropylene, polystyrene, halogenated plastics, polyurethane and mixed plastics.

     

Occurrence and volatility of several trace elements in pulverized coal boiler

The contents of eight trace elements(Mn, Cr, Pb, As, Se, Zn, Cd, Hg) in raw coal, bottom ash and fly ash were measured in a 220 t/h pulverized coal boiler. Factors affecting distribution of trace elements were investigated, including fly ash diameter, furnace temperature, oxygen content and trace elements‘ characters. One coefficient of Meij was also improved to more directly show element enrichment in combustion products. These elements may be classified into three groups according to their distribution: Group 1. Hg, which is very volatile. Group 2: Pb, Zn, Cd, which are partially volatile. Group 3: Mn, which is hardly volatile. Se may be located between groups 1 and 2. Cr has properties of both group ! and 3. In addition, the smaller diameter of fly ash, the more relative enrichment of trace elements (except Mn). The fly ash showed different adsorption mechanisms of trace elements and the volatilization of trace elements rises with furnace temperature. Relative enrichments of trace elements(except Mn and Cr) in fly ash are larger than that in bottom ash. Low oxygen content can not always improve the volatilization of trace elements. Pb is easier to form chloride than Cd during coal combustion. Trace elements should be classified in accordance with factors.     

乙腈罐区道化法火灾危险性分析

乙腈在常温常压下为无色透明液体,闪点为2℃,燃点524℃,爆炸极限3．0％～16．0％。乙睛易燃,其蒸气与空气可形成爆炸性混合物,遇明火、高热或与氧化剂接触,有引起燃烧爆炸的危险,与氧化剂能发生强烈反应,燃烧时有发光火焰,与硫酸、发烟硫酸、氯磺酸、过氯酸盐等反应剧烈。