Comparative Analysis of Ecophysiological Characteristics of Stephanodiscus hantzschii Grun. in the Periods of Its Bloom in Recreational Water Bodies

In the periods of summer and autumn bloom of the Stephanodiscus hantzschii Crun. in recreational water bodies, studies on the vertical distribution of chlorophyll a, its contents per unit biomass, efficiency in using photosynthetically active radiation (E_PhAR), and assimilative activity of microalgae were performed. The results confirmed the existence of two ecophysiological forms of St. hantzschii and provided evidence that both forms are typically autotrophic and can efficiently use low-intensity PhAR for photosynthesis.     

自动电位滴定法测定水中氯离子

以银电极为响应电极，用硝酸银溶液滴定水中氯离子，等当点时，产生电位突跃，以此确定终点电位，在仪器上锁定的此终点电位值，从而完成样品的自动分析。     

过氧化聚吡咯/聚乙烯吡咯烷酮修饰碳糊电极测定废水中苯酚

建立了过氧化聚吡咯(OPPy)和聚乙烯吡咯烷酮(PVP)修饰碳糊电极测定废水中苯酚的方法.优化了试验条件,苯酚的氧化峰电流在1.0×10-5 mol/L～1.0×10-3 mol/L之间线性关系良好,检出限为1.0×10-6 mol/L.该电极制作简单,选择性好,测定灵敏度高,精密度与准确度均符合要求.     

BOD5测定方法的研究

通过对比实验，对BOD5的测定方法进行研究，探索用氧电极法测定BOD5的可能性和可行性，对其不足之处提出相应的解决措施，使之能更适用于科研、监测教学等方面的需要。     

电极旋转放电条件下O3合成效率的理论研究

根据低温等离子体理论和电磁场理论，在实验的基础上研究了电极旋转条件下低温等离子体的产生机制和臭氧的合成机制，分析了放电过程中二次放电重叠对臭氧合成的影响，建立了旋转放电与二次放电的理论模型，并根据这一理论模型导出电极旋转条件下的臭氧合成效率与二次放电重叠概率以及电极旋转速度间的理论关系．这一理论结果表明：二次放电重叠使得臭氧合成效率降低，而电极以适当地速度旋转则可以有效地避免二次放电的重叠，从而提高臭氧的合成效率．理论值和实验结果能够较好地吻合．     

银硫离子选择电极测定工业废水中的硫化物

本法用Ag/S离子选择电极测定废水中的硫化物,测定浓度范围0.1～1000.0mg/l,方法精密度为4.3％,回收率为P2.5％,检出限为0.1mg/l。大多数离子不干扰测定,该法简便快速,适用于例行监测。     

Decomplexation of Cu-1-hydroxyethylidene-1,1-diphosphonic acid by a three-dimensional electrolysis system with activated biochar as particle electrodes

The feasibility of decomplexation removal of typical contaminants in electroplating wastewater, complexed Cu(II) with 1-hydroxyethylidene-1,1-diphosphonic acid (Cu-HEDP), was first performed by a three-dimensional electric reactor with activated biochar as particle electrodes. For the case of 50 mg/L Cu-HEDP, Cu(II) removal (90.7%) and PO initial pH 7, acid-treated almond shell biochar (AASB) addition 20 g/L, and reaction time 180 min, with second-order rate constants of 1.10 × 10⁻³ and 1.94 × 10⁻⁵ min⁻¹respectively. The growing chelating effect between Cu(II) and HEDP and the comprehensive actions of adsorptive accumulation, direct and indirect oxidation given by particle electrodes accounted for the enhanced removal of Cu-HEDP, even though the mineralization of HEDP was mainly dependent on anode oxidation. The performance attenuation of AASB particle electrodes was ascribed to the excessive consumption of oxygen-containing functionalities during the reaction, especially acidic carboxylic groups and quinones on particle electrodes, which decreased from 446.74 to 291.48 µmol/g, and 377.55 to 247.71 µmol/g, respectively. Based on the determination of adsorption behavior and indirect electrochemical oxidation mediated by in situ electrogenerated H₂O₂ and reactive oxygen species (e.g., •OH), a possible removal mechanism of Cu-HEDP by three-dimensional electrolysis was further proposed.     

修正光度法测定痕量阳离子表面活性剂

阳离子表面活性剂与二甲酚橙在ｐＨ７～８的溶液中发生显色反应，用修正光度法处理，能消除空白干扰，提高分析灵敏度，该方法检出限为０．０８ｍｇ／Ｌ，线性范围０～１５ｍｇ／Ｌ，加标回收率９６％～１０２％，适于环境痕量分析。     

活性污泥作为气化用型煤粘结剂的研究 Ⅰ.污泥添加量和型煤成型条件的考察

以活性污泥为研究对象，以合成氨厂广泛使用的白泥型煤参照，进行了气化用型煤粘结剂的研究，结果表明，当污泥添加量为２％白泥添加量为０．３％时，所制得的型煤抗压强度、跌落强度、热稳定性与白泥型相当。     

光电化学法处理水体中腐殖酸的初步研究

结合９０年代欧美学者提出了高级化学氧化过程（Ａｄｖａｎｃｅｄｃｈｅｍｉｃａｌｏｘｉｄａｔｉｏｎｐｒｏｃｅｓｓ，ＡＯＰ）原理，提出了并建立了一套光电化学联用的新用于处理难以生物降解的腐殖酸废水，实验表明，在通电１ｈ加光条件下（Ｉ＝０．２Ａ）总有碳（ＴＯＣ）去除率达到９０％，色度去除率达到９５％。