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251.
The photolysis of simulating low concentration of hydrogen sulfide malodorous gas was studied under UV irradiation emitted by self-made microwave discharge electrodeless lamps (i.e. microwave UV electrodeless mercury lamp (185/253.7 nm) and iodine lamp (178.3/180.1/183/184.4/187.6/206.2 nm)). Experiments results showed that the removal efficiency (eta H2S) of hydrogen sulfide was decreased with increasing initial H2S concentration and increased slightly with gas residence time; H2S removal efficiency was decreased dramatically with enlarged pipe diameter. Under the experimental conditions with pipe diameter of 36 mm, gas flow rate of 0.42 standard l s(-1), eta H2S was 52% with initial H2S concentration of 19.5 mg m(-3) by microwave mercury lamp, the absolute removal amount (ARA) was 4.30 microg s(-1), and energy yield (EY) was 77.3 mg kW h(-1); eta H2S was 56% with initial H2S concentration of 18.9 mg m(-3) by microwave iodine lamp, the ARA was 4.48 microg s(-1), and the EY was 80.5mg kW h(-1). The main photolysis product was confirmed to be SO4(2-) with IC. 相似文献
252.
A combined plasma photolysis (CPP) method for removal of CS2 from gas streams at atmospheric pressure 总被引:1,自引:0,他引:1
A combined plasma photolysis (CPP) reactor that utilizes a dielectric barrier discharge (DBD) plasma and 207 nm UV radiation from discharge-driven KrBr* excimers was designed and constructed. Gas streams containing CS2 were treated with stand-alone DBD and CPP at atmospheric pressure. In comparison to DBD, CPP greatly enhanced the removal efficiency at the same applied voltage, waste gas concentration and gas residence time. Thus the applied voltage could be reduced to a certain extent in the plasma processing of industrial wastes. Influences of the KrBr* radiation, inlet CS2 concentration and gas residence time on CS2 removal by CPP were also studied. In addition, the likely reaction mechanisms for the removal of CS2 by CPP are suggested based on the byproducts analysis. The enhanced removal efficiency and reaction mechanisms implied that the CPP process would probably be suitable for the removal of a large number of gaseous pollutants. 相似文献
253.
真菌Trichoderma viride Pers.ex Fr降解三苯废气性能实验 总被引:1,自引:0,他引:1
利用固相静态试验考察前期实验驯化出的真菌Trichoderma viride Pers.ex Fr对苯、甲苯、二甲苯的好氧生物降解性能。结果表明,在本研究的气相浓度范围内(苯47.25~1677.47g/m3,甲苯64.70~1258.50g/m3、二甲苯20.59~1707.85g/m3),3种气体的降解速率随其初始浓度的增大而增加,降解规律苯、甲苯符合Monod方程,二甲苯符合一级反应。 相似文献
254.
255.
This research aims to shed light on the interaction mechanism of cost risks for biomass material supply in power generation, especially for biomass-coal dual-fuel systems. Firstly, a game model is established to analyze interactions among factors including unit procurement cost, unit transportation cost, basic price and coal price for crop residue collection. Secondly, a Monte Carlo simulation is implemented to compare the profit increase under material competition with that under price alliance. The methodology is illustrated with a case study in a biomass power plant in Shandong Province, China. It shows that developing a price alliance will benefit both the allied enterprises and the local collection area in most circumstances. Thirdly, a risk tolerance area approach is applied in mapping the cost risk and in explaining the risky circumstances of the case study. 相似文献
256.
根据地震勘探爆破作业的特点 ,从爆破器材选择、作业过程中危险预防、爆破危害效应控制等方面提出了地震勘探爆破作业的安全对策。 相似文献
257.
着重阐述了武汉市汽车排气污染现状及汽车污染物的产生 ,介绍了国内外控制汽车污染物排放的技术和措施 ,提出了武汉市汽车排气污染的发展趋势。 相似文献
258.
ISO14000系列标准及其实施 总被引:1,自引:0,他引:1
本文从ISO14000系列标准的起源、标准的制定、标准的构成、标准的特点对ISO14000系列标准进行了全面介绍,阐述了我国实施ISO14000系列标准的必要性和组织如何实施环境管理体系,介绍了环境管理体系的认证和EMS审核员的要求,供读者对ISO14000系列标准有一全面的了解。 相似文献
259.
260.
城市污水生化处理水UV/O3法深度处理效果及影响因素研究 总被引:1,自引:0,他引:1
研究城市污水生化处理水的深度处理技术及其影响因素,对于减轻环境污染和实现废水回用具有重要理论意义和实用价值。考察了UV/O3法对城市污水生化处理水深度处理的效果及其影响因素。结果表明,由于UV/O3过程具有氧化能力强,反应无选择性等优点,使其在城市污水生化处理水深度处理方面较普通O3氧化更具有优势,50min时CODCr去除率达到90%以上,达到了深度处理的目的。对于难氧化有机物,UV/O3法处理时几乎大部分都被氧化分解残留量很少,而O3法处理时仍有较多难氧化有机物残留。UV/O3法处理城市污水生化处理水时,在pH=6~9时,CODCr去除率随pH的升高而降低,表明较低pH(pH=5)有利CODCr的去除。有机污泥对CODCr去除率基本没有影响。但无机悬浮物SiO2对CODCr去除率影响较大,投加70mg/L的SiO2后CODCr氧化速率和去除率有较明显下降。随溶液碱度的增加,CODCr的去除率下降,碱度越高对CODCr去除的影响也越明显。 相似文献