生物法净化再生胶生产废气工业试验研究

在再生橡胶厂进行橡胶再生低浓度有机废气的生物法净化工业试验研究，对于甲苯浓度为300～1400mg/m^3的再生胶脱硫废气，在常温常压下以气体流量10～20m^3/h、循环液体喷淋量300～500L/h运行生物法废气净化装置获得了良好物净化效果。该装置连续运行100d的结果显示，其对再生胶废气中甲苯的净化效率可较长时间的保持在90%左右，废气经处理后可以实现达标排放，废气处理成本约为工厂再生胶产值的0.12%～0.14%，具有明显的技术先进性和经济合理性。     

有机废气的生物处理

有机废气的处理是大气污染控制的一个重要方面。目前处理有机废气的主要方法有吸收法、吸附法和催化燃烧法三种,但前两种方法因吸附剂或吸收剂需要再生,故工艺复杂;后一种方法则运行费较高。因此,目前需要发展新的有机废气处理方法和技术。应用生物法处理有机废气正是在这种要求下受到人们重视和进行研究的。废水的生物处理早在一百多年以前就已成为一项确认的技术,而研究利用微生物处理废气的历史则要短得多。较早的报道见于1957年     

吸附—催化燃烧法处理低浓度有机废气

介绍了用活性炭纤维吸收器和催化反应器组合成一体，处理低肖度有机废气，废气先通过活性炭纤维吸收，饱和后利用催化反应器排出的热气脱吸，脱吸气经过催化燃烧后排放。     

活性炭吸附-精馏提纯有机废气回收技术在循环经济中的应用

阐述了治理有机废气的重要性，重点介绍了活性炭吸附-精馏提纯有机废气的回收技术，通过案例分析和对比，显示了该技术的优越性，提出在工业行业中，推广应用活性炭吸附-精馏提纯的回收技术，是符合循环经济理念的，不仅能够减少资源消耗，而且可以降低废气的污染物排放，实现有机废气的资源化利用。     

生物法净化低浓度工业废气的技术进展

综述了生物法净化有害气体的发展历史与现状，介绍了有机废气、SO2、H2S、NOx废气处理的生物净化实验研究和工业应用情况。     

改进型填料塔的设计及其在净化轮胎行业废气的应用研究

轮胎生产企业排放的废气，含有碳黑、非甲烷总烃、H2S及其他恶臭类有机气态污染物，难于处理。作者在连续接触式气液填料塔的基础上，通过设计改进，研制了新型气体喷淋填料塔，并将其应用于某轮胎生产企业的废气处理工程中，取得了较好的处理效果。     

生物滴滤床废气净化技术及应用

生物滴滤床是一种高效的废气净化装置 ,但其运行受诸多因素影响 ,采用传统的传质理论和传统的生物膜理论进行描述 ,难以取得满意结果 ,因此应从多方面来理解生物滴滤床的设计和运行 ,以开发高效的反应器和合理的运行处理系统。在分析中 ,综述了生物滴滤床净化有机废气的原理及运行中的多种影响因素 ,阐述了生物滴滤床的研究现状及相关应用。     

玻纤布上胶车间有机溶剂废气净化处理

介绍了工厂有机溶剂废气处理方案和设计及实际运行效果,具有简单经济、净化彻底的特点.     

玻纤布上胶车间有机溶剂废气净化处理

介绍了工厂有机溶剂废气处理方案和设计及实际运行效果,具有简单经济、净化彻底的特点。     

利用无泵水幕废气净化器治理高浓度NOx的工程实践

介绍了无泵水幕废气净化器的工作原理和运行特点，采用该设备处理某金刚石公司的酸洗车间高浓度的NOx气体，其净化效率达90％以上，净化后的NOx气体可直接达标排放。无泵水幕废气净化器解决了传统的水喷淋塔普遍存在的喷嘴堵塞、单级净化效率低、运行费用高等问题，在高浓度酸性气体治理方面具有很好的推广应用前景。     

Risk management activities for oil and gas producers and the impact on firm value

This study analyses whether hedging activities of oil and gas firms have a significant effect on the performance of the companies. The performance of companies is proxied by Tobin’s Q and panel regression models are built to estimate the coefficients for firm value and derivative use. The speculative use of derivatives is eliminated in models by the regulations under IFRS and GAAP. The results give critical information regarding asymmetric information and signalling effect. Since the coefficient of derivatives use is negative, it shows the critical meaning of disclosures on the financial healthiness. If companies are publishing high level of hedging activities, it might be a warning for investors to avoid investing at that company. This study also seeks for explanation behind firms’ hedging decisions. To our knowledge, it is among the first studies with a wide range of region and data.

     

贝壳粉型煤固硫剂固硫的实验及机理研究

以贝壳粉作为型煤固硫剂,用正交实验的方法研究了影响贝壳粉固硫率的主要影响因素,在高温(1 150℃)时固硫效率达到56.6%,比CaCO3的固硫率提高40%以上,具有较好的高温固硫性。分析得知,贝壳的主要成分为CaCO3,其含钙量在40%左右,贝壳中又含有较高的Na等碱金属元素以及Fe,Al和Si等。用X射线粉末衍射法分析了高温(1 150℃)型煤样生成的灰渣,分析了贝壳粉作为型煤固硫剂在高温下具有较高固硫率的机理。发现CaAlSi2O8为主的复合晶体在高温下包裹在CaSO4的表面,抑制了CaSO4的热分解从而有效地提高了固硫率。     

化学沉降沸石吸附法处理高浓度电镀含锌废水的研究

含锌废水对人体健康和环境具有严重的危害性。处理高浓度的含锌废水时需先进行化学沉降,然后再进行深度处理。试验结果证明,对于含289 mg/L Zn2+的电镀废水,用质量分数为10%的氢氧化钠处理,其投加量为3.7 mL/100 mL,处理后的Zn2+的浓度为6.6 mg/L。再用沸石进行吸附,沸石用量为0.25 g/L,搅拌(110 r/min)50 min,处理后,废水的锌离子去除率最高可达88.8%,剩余Zn2+浓度为0.47 mg/L,远低于《国家污水综合排放标准》(GB 8978-2002)的一级标准。     

The chemical exploitation of nickel phytoextraction: An environmental, ecologic and economic opportunity for New Caledonia

Herein, we explore the outlines of an innovative method based on the chemical recovery of metal-rich biomass produced in phytoextraction technologies. Taking advantage of the adaptive capacity of some New Caledonian plants to hyperaccumulate Ni²⁺ cations in their aerial parts, this technique is based on the direct use of metals derived from plants as “Lewis acid” catalysts in organic chemistry. Metallic cations contained in New Caledonian nickel hyperaccumulators are recovered through a simple cost-effective process and serve the preparation of heterogeneous catalysts used in synthetic transformations allowing access to molecules with high added-value. The design of all processes is in line with the principles of green chemistry; it is adapted to the new economic constraints; it offers a new relevant outlet for metal-rich biomass; and it represents an alternative to non-renewable mineral materials.     

Impact of spiked concentrations of Cd,Pb, As and Zn in growth medium on elemental uptake of Nasturtium officinale (Watercress)

This study is aimed at investigating the impact of water quality on the uptake and distribution of three non-essential and toxic elements, namely, As, Cd and Pb in the watercress plant to assess for metal toxicity. The plant was hydroponically cultivated under greenhouse conditions, with the growth medium being spiked with varying concentrations of As, Cd and Pb. Plants that were harvested weekly for elemental analysis showed physiological and morphological symptoms of toxicity on exposure to high concentrations of Cd and Pb. Plants exposed to high concentrations of As did not survive and the threshold for As uptake in watercress was established at 5 ppm. Translocation factors were low in all cases as the toxic elements accumulated more in the roots of the plant than the edible leaves. The impact of Zn on the uptake of toxic elements was also evaluated and Zn was found to have an antagonistic effect on uptake of both Cd and Pb with no notable effect on uptake of As. The findings indicate that phytotoxicity or death of the watercress plant would prevent it from being a route of human exposure to high concentrations of As, Cd and Pb in the environment.     

Statistical modelling of water colour in the uplands: The Upper Midd catchment 1979-1987

The increasing colour of raw water from the uplands is a matter of concern to water managers. The colour record for the period 1979-1987 is examined for the catchment of Upper Nidderdale, North Yorkshire. The variation in colour shows a marked seasonality with peaks occurring during the autumn months. No long-term sustained increase in colour is found, although colour levels were high in 1980, 1985 and 1987. Colour is found to be highly correlated with iron and, more particularly, aluminium. There is no relationship between colour and turbidity which suggests that there is no direct link between colour levels and erosion on the catchments. Colour increases appear to relate to large soil moisture deficits in months immediately prior to the colour flush and to high soil moisture deficits in the previous year. Complementary relationships are found between monthly rainfall totals and colour. In the light of these findings, it is suggested that high colour is associated with water table lowering and aerobic decomposition of the upper organic peat layers.     

The effects of preozonation on the biodegradability of mixed phenolic solution using a new gas-inducing reactor

In this study, the effects of preozonation on the biodegradability of mixed 2-chlorophenol/4-cresol solution were investigated using a new gas-inducing reactor, which can provide high ozone utilization efficiency. The decomposition rate of phenolic mixture, COD removal and TOC removal increases with increasing pH. A half-order overall kinetic model can correctly describe the decomposition of phenolic mixture. The BOD(5)/COD ratio of the preozonized solutions increases with increasing preozonation time, indicating that preozonation can enhance the biodegradability. Based on high ozone utilization rate, it is concluded that the best characteristic time can be chosen at the rapid increase of ozone gas outlet concentration. Since the ozone gas outlet concentration can be easily monitored, it is a useful real-time control parameter in preozonation.     

医疗垃圾的现状及处理对策

在评述各类医疗垃圾危害性及现有处理方法基础上提出，应重视医疗垃圾和生活垃圾的区分，医疗垃圾的最佳处置方法是焚烧，医疗废水的处理方法应建立在科学论证的基础上，并建议尽快出台相应的法规及政策。     

新型高效生物反应器类型和应用

近年来高效生物反应器得到不断发展,出现了多种新型生物反应器.从厌氧升流式生物反应器发展的经验和反应器的特点出发,提出了升流式反应器的结构、三相分离器的形式和污泥颗粒化现象等3个新概念是高效新型反应器的基础,进而在广义升流式污泥床反应器概念的基础上,提出具有传质效率高、处理能力强、有机负荷高以及抗冲击负荷能力强等优点的第三代高效生物反应器概念.     

膜生物反应器处理生活污水无泡供氧研究

用疏水性微孔膜制成的供氧器，向水溶液或发酵液供氧时，无气泡产生，这种无泡式供氧方式突破了传统的泡式供氧模式，具有传氧效率高，无泡沫产生和动力消耗低等优点，在膜生物反应器中用无泡式供氧进行生活污水处理试验研究，结果表明，它对生活污水中CODcr、BOD5、NH3－N、SS、大肠杆菌等都具有较好的去除效果。