DNDC模型在长江三角洲农田生态系统的CH4和N2O排放量估算中的应用

长江三角洲是我国农业发达地区之一 ,其农业生产所排放的CH4 和N2 O ,早已引起了研究者的重视 .本研究在分析总结现有的野外观测结果的基础上 ,验证了估算区域痕量气体排放量的生物地球化学模型DNDC ,估算出长江三角洲地区的CH4 和N2 O排放量分别为 1 69( 1 2 9～ 2 0 9)Tg·a-1和 0 0 1 9( 0 0 1 4～ 0 0 2 4 )Tg·a-1,分别占全国农田CH4 和N2 O排放量的 1 6 7%和 6 1 % .     

富氧条件下氢部分选择性催化还原NO研究

研制成功了低钯含量活性非均布Pd Al2 O3催化剂 ,实现了富氧条件下 ,氢部分选择性催化还原NO过程。实验表明在该催化剂上 ,低温、富氧条件下NO的转化率高达 80 %～ 10 0 %。室温下 (～ 2 0℃ ) ,NO对氢氧反应有强烈的抑制作用 ,氢氧反应进行后 ,NO还原反应开始明显进行 ,其与氢氧反应为竞争的平行反应     

Fe3++草酸盐络合物/H2O2/日光体系对垃圾渗滤液的处理

以Fe^3 草酸盐络合物／H2O2作光氧化剂，利用太阳光对垃圾渗滤液进行了光氧化降解实验。结果表明：在溶液的初始pH为3．0，H2O2投加量为460mg/L，ρ(Fe^3 )为20mg／L条件下，反应60min后，CODC4去除率可达80％左右；溶液的pH，P(H2O2)和ρ(Fe^3 )对光解过程有显著影响，而且在太阳光的照射下，CODCr去除率比在紫外光下高。在一定实验条件下，用日光／H2O2／草酸铁体系对城市垃圾渗滤液处理效果较好，可作为垃圾渗滤液的深度处理。     

高铁酸钾预处理印染废水的可行性研究

研究了高铁酸钾对印染废水中有机物、色度及重金属的去除；氧化絮凝后对污泥的产生和处置及其分解产物对后续生物处理系统的影响。高铁酸钾对COD去除率不高；在20mg／l投量下色度去除率可达90％以上，其分解产物不会对后续生物处理系统产生影响，高铁酸钾预处理印染废水是可行的。     

Kinetics of selective catalytic reduction of NO by NH_3 on Fe-Mo/ZSM-5 catalyst

The catalyst of Fe-Mo/ZSM-5 has been found to be more active than Fe-ZSM-5 and Mo/ZSM-5 separately for selective catalytic reduction (SCR) of nitric oxide (NO) with NH_3.The kinetics of the SCR reaction in the presence of O_2 was studied in this work.The results showed that the observed reaction orders were 0.74-0.99,0.01-0.13,and 0 for NO,O_2 and NH_3 at 350-450℃,respectively. And the apparent activation energy of the SCR was 65 kJ/mol on the Fe-Mo/ZSM-5 catalyst.The SCR mechanism was also deduced. Adsorbed NO species can react directly with adsorbed ammonia species on the active sites to form N_2 and H_2O.Gaseous O_2 might serve as a reoxidizing agent for the active sites that have undergone reduction in the SCR process.It is also important to note that a certain amount of NO was decomposed directly over the Fe-Mo/ZSM-5 catalyst in the absence of NH_3.     

Role of barium nitrate on the sulfur fixation of calcium oxide

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湿法吸收法处理氮氧化物废气

介绍了湿法吸收氮氧化物工业废气的方法，并对吸收液和吸收塔进行了深入的探讨和研究。     

An estimate of the conversion rates of SO_2 to SO_4~(2-)- and NO_2 to HNO_(3+) NO_3~- for the evaluation air pollution in Beijing

The conversion rates of SO2 to SO42- and NO2 to HNO3+NO3- are estimated from the field-data obtained in Beijing in summer, 1988. The results show that the conversion rate of NO2 is about four times as much as that of SO2; The conversion rates have a diurnal variation in a day. On the average, the rate of SO2 is estimated to be 4.7% h-1 during the daytime and 3.4% h-1 during the nighttime. Similarly, the rate of NO2 is estimated to be 17.2% h-1 and 12% h-1 respectively.     

血红蛋白-环氧苯乙烯加合物的分析

采用环氧苯乙烯和血红蛋白中羧酸基和巯基位的加合物同时测定的方法，对大鼠血红蛋白ＳＯ加的进行了体外实 腹腔注射环氧苯乙烯和苯乙烯的体内实验。结果表明在血红蛋白中所分析的３种加合物（ＳＧ，１－ＰＥ，２－ＰＥ）均随着ＳＯ剂量而增加。     

Competitive role of nitrogen functionalities of N doped GO and sensitizing effect of Bi2O3 QDs on TiO2 for water remediation

The promising solar irradiated photocatalyst by pairing of bismuth oxide quantum dots (BQDs) doped TiO₂ with nitrogen doped graphene oxide (NGO) nanocomposite (NGO/BQDs-TiO₂) was fabricated. It was used for degradation of organic pollutants like 2,4-dichlorophenol (2,4-DCP) and stable dyes, i.e. Rhodamine B and Congo Red. X-ray diffraction (XRD) profile of NGO showed reduction in oxygenic functional groups and restoring of graphitic crystal structure. The characteristic diffraction peaks of TiO₂ and its composites showed crystalline anatase TiO₂. Morphological images represent spherical shaped TiO₂ evenly covered with BQDs spread on NGO sheet. The surface linkages of $\text{NO}?\mathrm{O}?\text{Ti}$, $\mathrm{C}?\mathrm{O}?\text{Ti}$, $\mathrm{B}\mathrm{i}?\mathrm{O}?\text{Ti}$ and vibrational modes are observed by Fourier transform infrared spectroscopy (FTIR) and Raman studies. BQDs and NGO modified TiO₂ results into red shifting in visible region as studied in diffused reflectance spectroscopy (DRS). NGO and BQDs in TiO₂ are linked with defect centers which reduced the recombination of free charge carriers by quenching of photoluminescence (PL) intensities. X-ray photoelectron spectroscopy (XPS) shows that no peak related to $\mathrm{C}?\mathrm{O}$ in NGO/BQDs-TiO₂ is observed. This indicated that doping of nitrogen into GO has reduced some oxygen functional groups. Nitrogen functionalities in NGO and photosensitizing effect of BQDs in ternary composite have improved photocatalytic activity against organic pollutants. Intermediate byproducts during photo degradation process of 2,4-DCP were studied through high performance liquid chromatography (HPLC). Study of radical scavengers indicated that ${\mathrm{O}}_2^{·?}$ has significant role for degradation of 2,4-DCP. Our investigations propose that fabricated nanohybrid architecture has potential for degradation of environmental pollutions.