MgAlFe复合氧化物氧化吸附SO_2的性质

MgAlFe水滑石在 6 0 0℃以上焙烧后脱去表面水和层间水形成MgAlFe复合氧化物 通过对MgAlFe复合氧化物BET、XRD表征和测定它的吸附硫容 ,发现它对SO2 有优良的氧化吸附性能 吸附SO2 后MgO和尖晶石相消失 ,形成硫酸盐晶相 用氢气对饱和吸附SO2 后的MgAlFe复合氧化物进行还原再生 ,发现它经过 10次吸附还原循环后 ,MgO和尖晶石的晶相依然存在 ,是一种可循环利用脱除SO2 的环境催化材料     

活性炭固定床操作参数的优化

研究了操作参数对活性炭固定床处理有机废气的影响。温度升高，吸附容量下降。湿度的存在会减少活性炭对有机物的吸附容量。适当的操作气速为0.1-0.5m/s，在此范围内，气速与压降在对数坐标上呈线性关系。     

Exchange of sulfur pollution between Bulgaria and Greece

The EMAP model (Eulerian Model for Air Pollution) is applied for calculating the sulfur concentration and deposition fields for 1995 as based upon Bulgarian and Greek sources. The country-to-country budgets show that about 4% of the sulfur oxides emitted by Bulgaria are deposited over Greek territory, estimated at 28 kt S. Only 2% of sulfur compounds emitted by Greece are deposited over Bulgaria, estimated at 6.2 kt S for 1995. This data is in agreement with EMEP/MSC-W estimates and provides more details concerning time and space. The results can be used in decision-making, negotiating and the development of contamination strategies.     

负载型金催化剂用于室温下CO的消除

从催化活性、抗潮湿、抗硫中毒、稳定性等方面考察了负载型金催化剂对于ＣＯ氧化反应的性能。筛选出的２－３催化剂可在－２２℃下完全消除ＣＯ，并且在催化活性、抗潮湿、抗硫中毒、稳定性等方面具有现行催化剂无法比拟的优点。     

Baseline study of methane emission from open digesting tanks of palm oil mill effluent treatment

Anthropogenic release of greenhouse gases, especially CO₂ and CH₄ has been recognized as one of the main causes of global warming. Several measures under the Kyoto Protocol 1997 have been drawn up to reduce the greenhouse gases emission. One of the measures is Clean Development Mechanisms (CDM) that was created to enable developed countries to cooperate with developing countries in emission reduction activities. In Malaysia, palm oil industry particularly from palm oil mill effluent (POME) anaerobic treatment has been identified as an important source of CH₄. However, there is no study to quantify the actual CH₄ emission from the commercial scale wastewater treatment facility. Hence, this paper shall address the CH₄ emission from the open digesting tanks in Felda Serting Hilir Palm Oil Mill. CH₄ emission pattern was recorded for 52 weeks from 3600 m³ open digesting tanks. The findings indicated that the CH₄ content was between 13.5% and 49.0% which was lower than the value of 65% reported earlier. The biogas flow rate ranged between 0.8 l min⁻¹ m⁻² and 9.8 l min⁻¹ m⁻². Total CH₄ emission per open digesting tank was 518.9 kg day⁻¹. Relationships between CH₄ emission and total carbon removal and POME discharged were also discussed. Fluctuation of biogas production was observed throughout the studies as a result of seasonal oil palm cropping, mill activities, variation of POME quality and quantity discharged from the mill. Thus only through long-term field measurement CH₄ emission can be accurately estimated.     

砷华生产废渣中硫的回收利用研究

高温下氧化焙烧细磨后的砷华生产废渣，利用软锰矿浆吸收产生的SO2气体，吸收液经净化除杂、浓缩结晶等工序可制备工业产品硫酸锰。适宜的焙烧条件如下：焙烧温度为650℃，焙烧时间为60min，废渣粒度为-97μm。选择合适的吸收工艺，Mn的浸出率可达96．20％，此时SO2脱除率为87．20％。     

一种新型烟气脱硫技术在燃煤锅炉上的扩大试验

介绍了用硫化碱加TFS添加剂进行燃煤锅炉煤气脱硫并副产硫代硫酸钠的中试成果。     

挥发性有机硫化合物释放的研究与展望

在介绍硫的生物地球化学循环的基础上，概述了几种挥发性有机硫气体ＤＭＳ，ＣＯＳ，ＭＳＨ，ＣＳ２和ＤＭＤＳ从各种自然源（主要是生物源）释放的情况，着重阐述了陆地生态系统中各种生物硫源的释放情况，列举了测定这些释放的硫通量的方法，并且对有机硫气体的大气行为及环境影响也作了论述。     

硫自养反硝化过程中含硫副产物产生规律及微生物群落结构的空间分布

为探究硫自养反硝化过程中含硫副产物的产生规律,建立了上流式硫自养固定床生物反应器,考察HRT（水力停留时间）对水中NO₃--N去除的影响,运用零级和1/2级反应动力学模型对NO₃--N还原过程进行拟合,通过测定与理论计算分析含硫副产物的产生趋势及规律,利用高通量测序技术（high-throughput sequencing）测定微生物群落结构空间分布特征.结果表明:①当进水NO₃--N浓度为（30.45±0.38）mg/L,HRT为4和1 h时,NO₃--N去除率达到98%以上.硫自养反硝化过程符合1/2级反应动力学模型,1/2K_1/2V（1/2级反应动力学速率常数）为5.69 mg1/2/（L1/2·h）.②出水SO₄2-的产生量接近理论值,S2-在反应器中部出现微量的积累,在出水口处浓度进一步降低（< 0.5 mg/L）.③HRT的缩短改变了反应器内部微生物群落α多样性的变化规律;Proteobacteria成为了最主要的优势菌群,各阶段所占比例均大于59%,Sulfurimonas为最常见的反硝化菌,在HRT为1 h时,反应器中部其丰度达到36%,成为反应器中的优势菌属;Desulfurella为SRB（硫酸盐还原菌）,其丰度的增加与反应器内部S2-的积累一致.研究显示,硫自养反硝化过程中产生的SO₄2-与理论值接近,S2-产生量沿反应器高度方向呈现先增加后降低的趋势,微生物群落结构分布情况与反应器高度有关.