长江中下游海相三叠系膏盐层与铜(金)、铁矿床

长江中下游海相三叠系膏盖层中含有很大比例的大、中型铜（金）、铁、多金属矿床。膏盐层不仅是铜（金）、铁矿床的主要赋矿层位之一，而且是部分成矿金属的矿源层；膏盐层还为燕山期岩浆提供部分钠质、钾质及挥发组分，影响岩浆演化的方向，改变了含矿流体的性质；另外，从岩体和矿床中金属硫化物中流同位素重硫成分的增高，说明在成者、成矿过程中，膏盐层是硫的供应者之一。因此膏盐层与铜（金）、铁、多金属矿床之间存在着特殊的成因联系。     

碘量法测定甲醛废水中Fe^＋＋＋干扰的消除

用碘量法测定废水中甲醛含量时，Ｆｅ＾３＋的存在会使测定结果偏低，宜寻找合适的掩蔽剂以消除干扰。     

V2O5-WO3/TiO2脱硝催化剂的制备及其性能

对选择性催化还原脱硝用催化剂V2O5-WO3/TiO2的制备工艺进行了实验研究.采用溶胶-凝胶法制得TiO2凝胶,对凝胶进行不同条件下的干燥和煅烧处理,然后通过浸渍法在TiO2上依次负载WO3和V2O5,最终得到V2O5-WO3/TiO2催化剂.结果表明,TiO2凝胶的处理温度对催化剂结构和脱除NO的性能有一定的影响,TiO2凝胶干燥温度为105 ℃时制得的催化剂活性较高,在实验条件下NO脱除率最高可达98.3%.     

An approach to the fluctuation mechanism of ecotone

In this paper,the relationship among land productivity,population pressure and the fluctuation mechanism of ecotone is analyzed,taking coumties and banners of southeast Inner Mongolia plateau as an example,which is the most fragile part in the farming and husbandry interleaving belt of north China due to its severe desertification degree and low level of economic development.The Cv for the total output value of agriculture decreases from southeast to northwest,with the same rule as which the overloading population cumulated distributes,and both indicators have close relation with the high linear coefficient of 0.83.These reveal the fluctuation mechanism for ecotone:fluctuation of the level of economic development is a scientific and practical measure both to weakness degree and to instability of ecotone,because it is a synthesized response to the variation of climate as well as irrational land uses,which reinforce and magnify the fluctuation.In detail,the heavier the population overloading,the severer the grassland reclamation,the stronger the dependence of regional productivity on rainfall,the lower the level of economic development,the rougher the fluctuation of ecotone,but the weaker the PRED system.     

聚合氯化铝铁检验方法研究

聚合氯化铝铁是一种新型净水剂,它结合铝系和铁系净水剂的优点,有助于减少水中铅含量。利用《水处理剂聚合氯化铅(GB15892-1995)》和《净化剂聚合氯化铁(GB14591-93)》的方法,对聚合氯化铅铁主要技术指标的检验做了探索。经反复实验,取得了较好的效果。     

On-line optical determination of floc size of Fe(Ⅲ) coagulants

This study investigated the floc aggregation, average floc size, floc size variance and floc growth velocity when ferric chloride （FeCl3） and polyferric chloride （PFC） were used to treat the simulated water samples. The factors including coagulant dose, ionic strength and solution pH, which affect the floc aggregation, were studied. Experiments were carried out in a bench-scale reactor using photometric dispersion analyzer （ PDA）. Results showed that there were great differences between the floc aggregation of PFC and FeCl3. The average floc size and fioc growth velocity of PFC were much larger than those of FeCl3. Compared with FeCl3, PFC gave a better coagulation performance in wider range of pH, dosage and ionic strength. It was also found that the coagulation efficiency of PFC did not depend on average floc size but on floc growth velocity.     

从自燃煤矸石中提取聚合铝铁(PAFC)的试验研究

采用盐酸酸浸的方法从自燃煤矸石中提取聚合铝铁，对煤矸石的粉碎粒径、酸浸盐酸的浓度及用量、酸浸的温度等工艺条件进行了试验研究。结果表明，从100g自燃煤矸石中，可提取19．85g固体聚合铝铁，成品的Al2O3含量33％、Fe2O3含量16％、盐基度70％。     

Catalytic dechlorinafion of o-chlorophenol by nanoscale Pd／Fe

Transformation of chlorophenols by nanoscale bimetallic particles represents one of the latest innovative technologies for environmental remediation. Nanoscale Pd/Fe bimetallic particles were synthesized in the laboratory for treatment of o-chlorophenol. Most of the nanoscale particles are in the size range of 20-100 nm. BET specific surface area of the nanoscale Pd/Fe particles is 12.4 m2/g. In comparison, a commercially available Fe powder( < 100 mesh) has a specific surface area of just 0.49 m2/g. Batch experiments demonstrated that the nanoscale Pd/Fe bimetallic particles can effectively dechlorinate o-chlorophenol. Dechlorination efficiency is affected by the mass fraction of Pd in the bimetal, nanoscale Pd/Fe mass concentration and mixing intensity.     

油罐铁的硫化物"自燃"危害及防护措施

分析了铁的硫化物的危害特性，阐述了硫化物“自燃”产生的热量是造成油罐发生火灾事故的主要原因，并提出了相应的防护措施，提高油罐日常使用的安全可靠性。     

用熟化法从硫铁矿烧渣中提取铁

用熟化法提取硫铁矿烧渣中的铁 ,熟化温度与硫酸浓度对铁的提取率有显著影响 ,过高的酸浓度不利于铁的提取。为了提高铁的提取率 ,应选择适宜的硫酸浓度和熟化温度。