水泥窑协同处置POPs污染土壤对环境的影响研究

 分析了水泥窑协同处置POPs污染土壤对烟气中污染物排放和熟料品质的影响,结果表明,SO2、NOx、HCl、Hg、As、Ni、Pb、粉尘、二 的排放量均低于工业大气污染物排放规定限制,与空白试验相比,水泥窑协同处置污染土壤过程中烟气中特征污染物排放量没有显著增加.水泥熟料化学成分满足相关规定,熟料产品质量达到相关标准,因此利用水泥窑协同处置POPs污染土壤是一种环境友好处理方式.     

一株产生物表面活性剂菌株的筛选

从被长期受石油污染的特定环境中取样,经富集培养和平板法筛选得到9株乳化性能较好的菌株.采用排油圈法对这9株菌进行表成活性测定,其中菌株SF-6表面活性最强,通过形态观察和部分生理生化试验初步鉴定该菌株为铜绿假单胞菌(Pseudomonas Aeruginosa),其所产生物表面活性物质初步鉴定为鼠李糖脂.     

聚丙烯中空纤维膜吸收法烟气脱硫实验研究

采用质量分数为30%的甲基二乙醇胺(MDEA)水溶液为烟气SO2吸收液,聚丙烯(PP)中空纤维微孔膜组件为吸收器,研究吸收液温度、流量变化,气体停留时间,以及气液两相流程等操作条件对聚丙烯(PP)中宅纤维膜脱硫率的影响,研究表明30%MDEA水溶液在温度35℃,流量100mL/min的最佳试验条件下,经过一个膜吸收过程...     

成都地铁4号线施工期环境影响分析及对策

文章分别从施工噪声及振动环境、大气环境、水环境等方面分析了成都地铁4号线一期工程施工期对环境的影响,指出了上述几个方面对环境要素的影响范围及程度,并提出了对噪声振动源集中布置、合理安排作业时间、工地内定期洒水防尘、施工污废水分类处理排放等防治对策,最后从工程实施全过程的角度提出了加强环境管理的具体措施。     

燃煤电厂脱硫粉煤灰理化特性及排放特征

以徐州某电厂脱硫粉煤灰为研究对象,分别研究了脱硫粉煤灰的粒径分布、微观形态、矿物组成和元素含量4方面的物理化学特性,并在此基础上研究了该电厂脱硫粉煤灰颗粒及其中所含元素的排放特征.结果显示,该电厂粉煤灰颗粒物以拉径在3～45 μm的颗粒为主,数量占80％以上,并以表面光滑的球形颗粒居多,并含有少量表面附着小颗粒晶体的球形颗粒和表面有孔的球形颗粒,以及一些不规则颗粒,其主要的矿物组成是莫来石和石英.该电厂粉煤灰颗粒物的排放因子达到了1.95 kgt.粉煤灰的元素组成选取了Mn,Zn,Cr,Cu,Pb,Ni,Cd 7种元素,其中Mn在粉煤灰中的含量最高,相对应的Mn元素的排放因子也高,达到了125.04 g/t.由于该厂粉煤灰含有一定量的重金属元素,随意堆放和处理会对人体和环境产生一定的影响,因此必须做好粉煤灰的处理与处置,降低粉煤灰对人体和环境的危害作用.     

UASB+双级好氧生物工艺处理豆奶制品废水

根据徐州市某豆奶制品企业废水水质分析,采用UASB+双级好氧生物法进行处理.运行结果表明,出水各项指标均能达到GB 8978-1996《污水综合排放标准》一级标准,工程投资和运行费用合理,运行效果稳定.     

东滩煤矿水资源梯级利用处理工艺与模式研究

东滩煤矿水资源包括深井水和矿井水,根据水源水质特征,将深井水和矿井水处理后最终作为直饮水、井下生产用水、电厂循环冷却水、电厂化水车间用水。实现了水资源的梯级利用,节约了水资源,保护了矿区环境。文中介绍了直饮水处理、矿井水净化处理、矿井水深度处理、生活污水二级生化处理、生活污水深度处理的处理规模、进水和出水水质、工艺流程等内容,并给出了水资源梯级利用模式,供其他类似矿区借鉴。     

Seasonal and diurnal variations of atmospheric peroxyacetyl nitrate, peroxypropionyl nitrate, and carbon tetrachloride in Beijing

Atmospheric peroxyacetyl nitrate(PAN), peroxypropionyl nitrate(PPN), and carbon tetrachloride(CCl4) were measured from September 2010 to August 2011 in Beijing. PAN exhibited low values from mid-autumn to early spring(October to March) with monthly average concentrations ranging from 0.28 to 0.73 ppbV, and increased from early spring to summer(March to August), ranging from 1.37–3.79 ppbV. The monthly variation of PPN was similar to PAN, with low values(below detection limit to 0.18 ppbV) from mid-autumn to early spring, and a monthly maximum in September(1.14 ppbV). The monthly variation of CCl4was tightly related to the variation of temperature, exhibiting a minimum in winter(69.3 pptV) and a maximum of 180.6 pptV in summer. Due to weak solar intensity and short duration, PAN and O3showed no distinct diurnal patterns from morning to night during winter, whereas for other seasons, they both exhibited maximal values in the late afternoon(ca. 15:00 to 16:00 local time) and minimal values during early morning and midnight. Good linear correlations between PAN and PPN were found in autumn(R = 0.91), spring(R = 0.94), and summer(R = 0.81), with slopes of 0.130, 0.222, and 0.133, respectively, suggesting that anthropogenic hydrocarbons dominated the photochemical formation of PANs in Beijing. Positive correlation between PAN and O3 in summer with the low slopes( O3 / PAN) ranging from 9.92 to 18.0 indicated serious air pollution in Beijing, and strong negative correlation in winter reflected strong O3consumption by NO titration and less thermal decompositin of PAN.     

Characteristics of atmospheric particles and heavy metals in winter in Chang-Zhu-Tan city clusters, China

To understand the pollution characteristics of atmospheric particles and heavy metals in winter in Chang-Zhu-Tan city clusters, China, total suspended particulate(TSP) and PM10samples were collected in cities of Changsha, Zhuzhou and Xiangtan from December 2011 to January 2012, and heavy metals of Cd, Pb, Cr, and As were analyzed. It shows that the average TSP concentration in Changsha, Zhuzhou and Xiangtan were(183 ± 73),(201 ± 84) and(190 ± 66) μg/m3respectively, and the average PM10 were(171 ± 82),(178 ± 65) and(179 ± 55) μg/m3respectively. The lowest TSP and PM10concentrations occurred at the background Shaping site of Changsha. The average ratio of ρ(PM10)/ρ(TSP) was 91.9%, ranging from 81.3% to 98.9%. Concerning heavy metals, in TSP samples, the concentration of Cr, As, Cd and Pb were 28.8–56.5, 18.1–76.3, 3.9–26.1 and 148.0–460.9 ng/m3, respectively, while in PM10samples, were 16.4–42.1, 15.5–67.9, 3.3–22.2 and 127.9–389.3 ng/m3, respectively. The enrichment factor of Cd was the highest, followed by Pb and As, while that of Cr was the lowest.     

浙江省污水污泥处理处置状况的调查

通过对丽水、宁波、衢州、诸暨等浙江省境内十几个地区的污水处理厂的调查发现:目前浙江省内的污水处理工艺中,A2/O、A/O、氧化沟三种工艺占了近50%的份额。而SBR因其方法特点正在受到越来越多的重视。在污泥处理工艺中,填埋占了最大的一部分,有近70%的污水处理厂将产生的污泥进行填埋处理。目前,污泥处理技术单一,需要继续探寻污泥的减量和资源化技术,为日益增多的污泥探寻出路。