浅谈欧盟化学品新法规及其对我国石油化工行业的影响

介绍了即将实施的欧盟化学品新法规出台背景和主要内容,并浅析了新法规对我国石油化工行业的影响.     

石化污水处理场浮选剂的优化

对几种浮选剂在荆门石化污水处理场的处理效果进行了对比,结果表明岳阳云溪XY-Ⅱ和江苏武进PAFC比现有PAC浮选剂的处理效果佳,且运行成本低.     

Multilevel air quality evolution in Shenyang: Impact of elevated point emission reduction

Visibility observed at different altitudes is favorable to understand the causes of air pollution. We conducted 4-years of observations of visibility at 2.8 and 60 m and particulate matter(PM) concentrations from 2015 to 2018 in Shenyang, a provincial city in Northeast China. The results indicated that visibility increased with the increasing height in winter(especially at night), and decreased with height in summer(especially at the daytime). PM concentration exhibited opposite vertical variati...     

上海市若干环境污染物的诱变性

用中国仓鼠肺成纤维细胞(V_(79)),进行次黄嘌呤—鸟嘌呤磷酸核糖转移酶位点(HGPRT Locus)试验,检测了上海市若干环境污染物的诱变性。结果发现,污染物量与诱变性之间呈剂量—反应关系。所有样品经代谢活化后(加S_9),其诱变性均有增高的趋势。卷烟焦油、油烟冷凝物的T/C值均>3,而不加S_9的黄浦江水和自来水样,则对V_(79)细胞可能具有间接的诱变作用(T/C值<3)。     

普通高校的音乐教学探讨

音乐教育对每个人的素质培养具有重要作用，但长久以来音乐教育都不被学校、学生所重视，在我国高校的音乐教育才刚刚起步。作者根据自身多年的高校音乐教学经验，认为高校的音乐教育关键是编订独具特色的音乐教材、开启学生的兴趣之门、施行兼收并蓄的教学方法。     

Identification of rice cultivars with low brown rice mixed cadmium and lead contents and their interactions with the micronutrients iron, zinc, nickel and manganese

Paddy fields in mining areas are usually co-contaminated by a cocktail of mixed toxic heavy metals (e.g., Cd and Pb in Pb/Zn mines). However, previous studies on rice cultivars screened for effective metal exclusion have mostly focused on individual metals, and have been conducted under pot-trial or hydroponic solution conditions. This study identified rice cultivars with both low Cd and Pb accumulation under Cd-and Pb-contaminated field conditions, and the interactions of the toxic elements Cd and Pb with the micronutrient elements Fe, Zn, Mn and Ni were also studied. Among 32 rice cultivars tested, there were significant differences in Cd (0.06-0.59 mg/kg) and Pb (0.25-3.15 mg/kg) levels in their brown rice, and similar results were also found for the micronutrient elements. Significant decreases in concentrations of Fe and Mn were detected with increasing Cd concentrations and a significant elevation in Fe, Mn and Ni with increasing Pb concentrations. A similar result was also shown by Cd and Ni. Three cultivars were identified with a combination of low brown rice Cd and Pb, high micronutrient and grain yield (Wufengyou 2168, Tianyou 196 and Guinongzhan). Present results suggest that it is possible to breed rice cultivars with low mixed toxic element (Cd, Pb) and high micronutrient contents along with high grain yields, thus ensuring food safety and quality.     

Co对腈纶废水厌氧处理效果的影响

利用厌氧反应装置,以腈纶废水为处理对象,通过2组试验,对比了微量金属(Co)投加前后废水中有机物降解情况、累积产气量、三维荧光光谱图以及微生物生长情况,研究了微量Co对腈纶废水厌氧处理效果的影响.结果表明:当Co的投加浓度〔以ρ(CoCl2)计〕为1.0 mg/L时,CODCr去除率达71.7%,累积产气量达到22.5 mL;当Co的投加浓度超过10 mg/L时,CODCr去除率为20%左右,累积产气量8.5 mL,未投加Co元素的空白对照组CODCr去除率为43.1%,累积产气量为10 mL.显示微量Co对腈纶废水厌氧生物降解具有一定的促进作用.      

Surface clogging process modeling of suspended solids during urban stormwater aquifer recharge

Aquifer recharge,which uses urban stormwater,is an effective technique to control the negative effects of groundwater overexploitation,while clogging problems in infiltration systems remain the key restricting factor in broadening its practice.Quantitative understanding of the clogging process is still very poor.A laboratory study was conducted to understand surface physical clogging processes,with the primary aim of developing a model for predicting suspended solid clogging processes before aquifer recharge projects start.The experiments investigated the clogging characteristics of different suspended solid sizes in recharge water by using a series of one-dimensional fine quartz sand columns.The results showed that the smaller the suspended particles in recharge water,the farther the distance of movement and the larger the scope of clogging in porous media.Clogging extents in fine sand were 1 cm,for suspended particle size ranging from 0.075 to 0.0385 mm,and 2 cm,for particles less than 0.0385 mm.In addition,clogging development occurred more rapidly for smaller suspended solid particles.It took 48,42,and 36 hr respectively,for large-,medium-,and small-sized particles to reach pre-determined clogging standards.An empirical formula and iteration model for the surface clogging evolution process were derived.The verification results obtained from stormwater recharge into fine sand demonstrated that the model could reflect the real laws of the surface clogging process.     

县域农用地生态价值评估研究 ——以玉山县为例

针对当前农用地估价工作中存在的重社会经济价值评价,轻生态价值评价,长期缺乏农用地价值的完整认识,直接导致农用地被低价转为建设用地的问题,本研究将采用农用地生态价值估价新方法——吸碳制氧法来测算玉山县农用地生态价值,并与玉山县各乡镇农用地经济价值比较分析,以说明农用地生态价值评估在农用地估价工作中的重要性.研究结果表明,农用地生态价值的评估可以用于指导农用地外部合理流转,有利于农用地的保护,同时,对退耕还林、退田还湖也具有一定的指导意义,因此农用地生态价值评估是非常必要的.     

长寿湖富营养化调查

通过对2002年7月长寿湖发生严重富营养化时的监测，利用富营养化评价标准对产生富营养化的几项主要指标进行综合评价，评价结果表明；长寿湖水体已经处于富营养化状况，在所有监测点，总磷，总氮浓度高，其中总氮超标严重按GB3838-2002地表水环境质量标准评价，已经为劣V类水，长寿湖水体中主要的植物为稀脉浮萍和少量紫背浮萍，造成长寿湖水质污染的主要原因有3个方面；工业和生活废水污染，地表径流污染和养殖业污染。