燃煤锅炉烟气中一氧化氮排放浓度测量的不确定度评定

根据《测量不确定度评定与表示》（JJF1059-1999）,对燃煤锅炉烟气中一氧化氮排放浓度的测量不确定度进行评定。对废气监测领域不确定度评定具有现实意义。     

流化床厌氧反应器流化及反应特性研究

对流化床厌氧反应器的流化及反应特性进行研究,结果显示:床层实际初始流化流速umf为0.138～0.154cm/min,与理论计算值0.143 cm/min一致;在一定范围内,流速增大有利于反应量的提高,当流速为0.414 cm/min时,单位时间内的反应量达到最大,其值为4.66 mg/(L·min);适当提高流速有利...     

某高含硫气田采气厂职业病危害因素检测与评价分析

分析了采气厂采气生产过程的职业病危害因素,对所采取的职业危害防护措施的效果进行了评价,探讨了职业危害关键控制点和防护的特殊要求.     

主要污染物排放总量综合管理与应用

污染物排放总量控制制度在减少污染物排放、减轻环境污染、改善环境质量等方面发挥着重要的作用。本文以排污总量控制为出发点,梳理了污染物排放量初始核定、排污许可证、排污权交易、总量减排核查核算等工作现状,探讨了当前各项总量业务在管理中存在的问题,并提出构建"减排量综合利用体系"的观点,以期提供高效的总量管理方案,为进一步推进总量减排制度的发展和完善提供借鉴和参考。     

包谷垴-小河断裂——2014年8月3日云南鲁甸M_S6.5地震发震构造

2014年8月3日云南鲁甸发生MS6.5地震。通过对鲁甸地震震源机制解、余震分布、断裂组合样式及区域地质构造背景综合分析,得出以下结论:根据地震等震线长轴衰减方向、震源机制解、震后前期强余震分布样式及地表破裂,判定本次地震的发震构造为包谷垴-小河断裂;根据莲峰断裂、昭通断裂和包谷垴-小河断裂之间的构造组合样式、地表GPS水平运动速率及水平缩短速率的差异性判断包谷垴-小河断裂为同向差异逆冲型捩断层;根据莲峰、昭通断裂带上的地震震源深度分布规律,认为在断裂带下15~20km处地壳物质呈塑性流动状态,在来自大凉山次级块体南东向运动给予的应力挤压下,形成了包谷垴-小河捩断层,并且导致了鲁甸地震的发生。     

Interannual variability of carbon cycle implied by a 2-d atmospheric transport model

A 2-dimensional atmospheric transport model is deployed in asimplified CO2 inverse study. Calculated carbon flux distribution for the interval from 1981 to 1997 confirms the existence of a terrestrial carbon sink in mid-high latitude area of North Hemisphere. Strong interannual variability exists in carbon flux patterns, implying a possible link with ENSO and other natural episodes such as Pinatubo volcano eruption in 1991. Mechanism of this possible link was investigated with statistic method. Correlation analysis indicated that in North Hemisphere, climatic factors such as temperature and precipitation, to some extend, could influence the carbon cycle process of land and ocean, thus cause considerable change in carbon flux distribution. In addition, correlation study also demonstrated the possible important role of Asian terrestrial ecosystems in carbon cycle.     

Influence of packing media on nitrogen removal in a subsurface infiltration system

Influence of packing media on nitrogen removal in a subsurface infiltration system was studied. System A was filled with loamy soil and system B was filled with mixed soil of 75% red clay with 25% cinder. Both systems were fed with sewage at the same hydraulic loading of 2 cm/d at continuous operation mode. The same excellent removal performances of COD and T-P could be achieved in both infiltration systems with removal rates about 85% and 98%, respectively. In system A, NH4^ -N removal rate was as high as 96.5% and T-N removal rate was relatively much lower as 55.7%. And in system B, NH4^ -N removal rate was as low as 75.4% and T-N removal rate was relatively much higher as 75.5 %. The difference was attributed to different soil oxidation-reduction condition that was greatly influenced by soil texture in subsurface infiltration system. Loamy soil led to oxidative condition that was favorable to nitrification and disadvantageous to denitrification. The results were just adverse to the system filled with clay. Intermittent operation was adopted to improve nitrogen removal in system B. NH4^ -N removal rate could be increased to about 95% and T-N removal rate could be increased to about 90% at intermittent operation mode in system B. Analysis of nitrogen removal mechanisms indicated that nitrification-denitrification was the primary nitrogen removal path in subsurface infiltration system and crop uptake was another important nitrogen removal way, It was the key to improve the total N removal performance that a suitable packing soil was available to present favorable oxidation-reduction condition for simultaneous nitrification and denitrification.     

赣南稀土区生物效应研究——稀土日允许摄入量

通过对赣南稀土区食谱中稀土分布调查,人体某些健康项目调查及结合动物实验结果分析,估算得稀土区成人的稀土（REO）日摄入量为6.0～6.7mg,属不安全量,而对照区成人日摄入量为3.3mg为安全量,据此分析比较,认为成人日允许摄入量定为4.2mg较妥,约为前人由动物实验外推的允许日摄入量14～24mg的五分之一。本研究对预测稀土远期环境风险有一定的参考价值,并提出应着手研究稀土污染治理问题。     

厌氧滤池-膜生物反应器处理垃圾渗滤液不同工艺段中有机氯农药残留的分析

建立了基于HLB固相萃取柱和气相色谱／电子捕获(GC／ECD)分析垃圾渗滤液中有机氯农药的分析方法,对厌氧滤池．膜生物反应器处理垃圾渗滤液不同工艺段水体中有机氯农药的浓度进行了分析．结果表明,应用厌氧滤池．膜生物反应器处理垃圾渗滤液可以有效去除有机氯农药残留,主要去除工艺是厌氧,其中P,P’-DDT厌氧反应的中间体产物是P,P’-DDD,大部分继续转化为其它产物．在所试验的垃圾渗滤液中没有检出DDTs和HCHs以外的其它优先控制有机氯农药．     

脉冲电晕放电下用焦化废水脱硫的研究

在脉冲电晕放电条件下用武汉钢铁厂的炼焦废水进行了烟气脱硫实验。研究表明焦化废水具有良好的脱硫能力 ,实验中超过 85 %的SO2 被脱除 ,脉冲电晕的引入使出口处SO2 的含量进一步降低。在脱除烟气中SO2 的同时 ,脉冲电晕放电使焦化废水中油和酚的含量极大的减少 ,并使超过 99%的氰化物被除去 ,这对解决焦化废水的生化处理中的好氧微生物失活问题有重要意义 ,有利于降低焦化废水的生化处理的难度 ,并可达到以废治废的目的。该研究为钢铁企业的烟气脱硫和焦化废水处理提供一种新思路