A regional data assimilation system for estimating CO surface flux from atmospheric mixing ratio observations—a case study of Xuzhou,China

Environmental Science and Pollution Research - Carbon monoxide (CO) emission inventory data are crucial for air quality control. However, the emission inventories are labor-intensive and...     

钢铁行业典型HAPs的控制减排

针对钢铁行业有毒有害大气污染物(HAPs)的污染控制难题,以汞和二噁英为典型污染物,论述了钢铁行业HAPs排放特征及控制技术,介绍了HAPs的管控机制,提出了钢铁行业HAPs减排建议。     

金沙江中游地区山茶属植物资源及其应用前景

金沙江中游地区山茶属植物资源非常丰富，种类２５种１变种，多度、频度都较大、所产种子富含油脂，油质好、无污染，是理想的食用油和工业用油，精提的山茶油是极好的护肤、护发用品，并发现了很有价值的优良育种材料，如开白花的四倍体山茶。     

三乙基铝泄漏及预防

介绍了3起典型的三乙基铝泄漏事故,总结了现有三乙基铝系统所采取的安全措施,提出预防三乙基铝系统泄漏应强化的措施。     

高浓度印染废水集中处理污水处理厂运行模式的探讨

介绍了绍兴污水处理厂春节枯水期、夏季高温以及污泥膨胀时这些不同情况下的运行情况进行分析,寻找规律,保证了污水处理厂能在不同的运行模式下能连续、稳定、预处理经济运行。     

生产三氯杀螨醇的滴滴涕环境风险及其控制途径研究

滴滴涕是《关于持久性有机污染物（POPs）的斯德哥尔摩公约》中首批受控物质。本文调查了国内传统三氯杀螨醇生产工艺情况,分析了生产过程和产品使用过程中滴滴涕环境排放途径及环境风险,结合公约中有关滴滴涕风险控制的相关要求,分析了有限场地封闭体系三氯杀螨醇生产的基本要素,提出了生产过程中的环境排放限值建议,明确了控制环境排放和环境风险的有效途径。为相关生产企业开展技术改造和实施自我考核以及相关部门开展监督管理工作提供建议。     

井口平台模型的完善与强度结果分析

分析了海上采油平台安全评估模型产生误差的原因,提出了平台安全评估模型修改建议,并应用修改后模型进行了计算,结果表明,修改后模型的计算结果与实际情况较为接近。     

Control of membrane fouling during hyperhaline municipal wastewater treatment using a pilot-scale anoxic/aerobic-membrane bioreactor system

Membrane fouling limits the effects of long-term stable operation of membrane bioreactor (MBR). Control of membrane fouling can extend the membrane life and reduce water treatment cost effectively. A pilot scale anoxic/aerobic-membrane bioreactor (A/O-MBR, 40 L/hr) was used to treat the hyperhaline municipal sewage from a processing zone of Tianjin, China. Impact factors including mixed liquid sludge suspension (MLSS), sludge viscosity (μup), microorganisms, extracellular polymeric substances (EPS), aeration intensity and suction/suspended time on membrane fouling and pollution control were studied. The relationships among various factors associated with membrane fouling were analyzed. Results showed that there was a positive correlation among MLSS, sludge viscosity and trans-membrane pressure (TMP). Considering water treatment efficiency and stable operation of the membrane module, MLSS of 5 g/L was suggested for the process. There was a same trend among EPS, sludge viscosity and TMP. Numbers and species of microorganisms affected membrane fouling. Either too high or too low aeration intensity was not conducive to membrane fouling control. Aeration intensity of 1.0 m³/hr (gas/water ratio of 25:1) is suggested for the process. A long suction time caused a rapid increase in membrane resistance. However, long suspended time cannot prevent the increase of membrane resistance effectively even though a suspended time was necessary for scale off particles from the membrane surface. The suction/suspended time of 12 min/3 min was selected for the process. The interaction of various environmental factors and operation conditions must be considered synthetically.     

铬盐废渣解毒研究

通过试验测定了长沙铬盐厂铬盐废渣的性质。正交试验研究得出了以硫酸铵[(NH4)2SO4]为解毒剂的铬渣干法解毒最佳工艺。即以粒径为75μm铬渣与加入量为13．3％(质量百分比)、粒径为427μm的硫酸铵混合均匀,于500℃急速加热30min、闭炉门冷却,解毒处理效率达96．41％。     

燃煤电站CFB锅炉飞灰热处理中汞释放特性

为考察循环流化床锅炉飞灰的汞释放特性,本文以某循环流化床CFB锅炉燃煤发电机组飞灰为样品,通过热处理实验和程序升温热解实验考察温度和时间对飞灰样品汞释放特性的影响以及热处理前后飞灰中汞的种类及其释放规律,并结合一级动力学方程、Elovich动力学方程、Freundlich动力学方程和抛物线扩散动力学方程对该过程进行具体分析.热处理实验结果表明,飞灰汞释放速率与热处理的温度和时间密切相关.温度为200℃以下时飞灰中汞的释放率最大不超过0.2,当温度达到300℃以上时,飞灰中汞的释放率不低于0.935.程序升温热解实验表明,飞灰中汞化合物种类包括HgCl_2、Hg_2Cl_2、HgO、HgSO_4、HgS (黑)和HgS (红),其中HgS (黑)和HgS (红)是飞灰中汞的主要赋存形态.动力学方程拟合结果表明,Elovic动力学方程适用于描述飞灰汞释放过程,各实验条件下拟合值与实验值的相关系数R~2均大于0.95,这说明该过程受多个反应机制控制且反应中活化能变化较大.