Effect of mass fraction of long flame coal on swelling pressure and microstructures of cokes

Long flame coal are abundant and widely distributed in China, but the resource utilization is quite low, the production efficiency is not high. Stamp-charging coke making technology can bend some long flame coal, which can reduce production cost and expand the coking coal resources. The long flame coal of different mass fraction is added into prime coking coal including fat coal from Longhu, 1/3 coking coal from Xinjian and coking coal from Didao in experiment. The swelling pressure is tested on-line detection using pressure sensor in coke making process, and the pores are observed by scanning electron microscopy. The results show that, the swelling pressure first increase and then decrease with the temperature increased and the maximum swelling pressure reduces gradually with mass fraction of the Long flame coal from Shenmu increased in coke making process. The SEM images of resultant coke display that the coke get more and more loose and the amount of pores is increased with mass fraction of the long flame coal from Shenmu increased. The amount pores and the pore diameter both is minimum for coking coal from Didao as prime coking coal under the same fraction of long flame coal.     

工业园区大气环境影响预测研究--以内蒙古蒙大新能源化工基地为例

工业园区大气环境影响预测的难点主要在于进入园区项目的不确定性使得预测工作没有较为精准的基础数据。因此,要在充分分析园区定位、产业特征和入园行业的基础上,以宏观与微观相结合的方式进行预测,设立多种情景分析;同时充分分析园区的所在地区的环境承载力,才能对园区建设对大气环境的影响有较为准确的把握。以内蒙古蒙大新能源化工基地为例,简要说明。     

环境保护历史转变时期的环境监测分析

本文通过多年来的工作实践和管理经验,针对新时期环境监测及污染源监测工作的特殊要求,围绕环境监测站的定位,软、硬件建设及监测数据管理的重要性,从多方面、多角度进行了详尽的阐述,提出了有针对性的对策与建议.     

浅谈环境影响评价中的环境监测

当前,我国正处于经济建设的高速发展时期,环境保护工作的发展面临着前所未有的机遇和挑战。环境监测作为环境保护管理中的最重要手段,贯穿于环境影响评价的全过程,其监测数据反映了环境质量状况和污染物排放情况,是环境污染预测的基础,是实施总量控制必不可少的手段,在环境影响评价体系中有着重要的作用。     

欧洲战略环境影响评价工作程序与特点分析研究

战略环境影响评价是指对法律、政策、计划或规划及其替代方案的环境影响进行正式的、系统的和综合的评价。欧洲战略环境影响评价的理论和实践在国际上具有领先的地位。本文介绍了战略环境影响评价的发展历程,特别对欧洲发达国家的战略环境影响评价的工作程序做了深入的分析,从战略的筛选、确定范围、环境影响评价、决策和批准、执行和监督、咨询与公众参与等方面,总结了欧洲战略环境影响评价的工作特点,对于中国战略环评工作的推动具有一定的借鉴意义。     

Optimization analysis of silver extraction from waste monolithic ceramic capacitor using persulfate-ammonia system

Journal of Material Cycles and Waste Management - Monolithic ceramic capacitors (MLCCs) contain a high level of silver. This paper describes a method to recover silver from the waste MLCCs. First,...     

气相色谱法测定饮用水中三氯乙烯含量的不确定度评定研究

分析和评定气相色谱法测定饮用水中三氯乙烯含量过程中引入的不确定度,分析了标准物质、分析操作、重复性测定等方面对不确定度的影响,实验表明在置信水平95%,包含因子k=2时,水中三氯乙烯测量结果的相对扩展不确定度为8.31%,三氯乙烯含量为3.17μg/L,扩展不确定度为0.263μg/L,测试过程的随机效应引入的不确定度对合成不确定度的贡献最大.     

区带流动分析技术测定水质中六价铬的研究

通过研究区带流动分析技术,借助于便携式MobiChem多功能化学分析仪,探索环境水样中六价铬的快速及连续的监测方法.采用二苯碳酰二肼做显色剂,检测波长540 nm,线性范围0~1000μg/L,校准曲线的线性相关系数R2=0.9996,具备良好的线性,检测限MDL=4.0μg/L.本方法测试数据的重复性好,智能除泡技术,能有效排除气泡干扰,适用于突发环境污染事故的现场快速应急监测与连续监测.     

Dynamics of phosphorus fractions and potential bioavailability along soil profiles from seasonal-flooding wetlands in a Chinese estuary

Environmental Science and Pollution Research - Soil phosphorus fractions in wetland ecosystems have received increasing attention due to its high eutrophication risks. Soil samples were collected...     

Application of different foliar iron fertilizers for enhancing the growth and antioxidant capacity of rice and minimizing cadmium accumulation

Environmental Science and Pollution Research - Iron (Fe) fertilizer can reduce cadmium (Cd) uptake and toxicity in rice, but the underlying mechanisms of Cd mitigation by different fertilizers are...