氯苯类有机物生物降解性及共代谢作用研究

利用测定微生物呼吸耗氧量的方法,对氯苯类中的5种优先污染物：氯苯,邻、间、对－二氯苯,1,2,4－三氯苯的生物降解性能进行测试,比较了它们用不同的驯化污泥试验的生物降解性能差异。结果表明,五种氯苯在各自驯化污泥作用下的降解性易难顺序为：氯苯＞邻二氯苯＞间二氯苯＞对二氯苯＞1,2,4－三氯苯,对于氯苯、邻二氯苯、间二氯苯分别驯化污泥,它们能彼此降解,但不能降解对二氯苯和1,2,4－三氯苯,对于对二氯苯和1,2,4－三氯苯分别驯化污泥,对5种受试有机物都能产生降解作用,且能提高它们的生物降解速率。分析表明,5种受试物诱导产生了两种不同类型的酶系统,共代谢作用在它们的生物降解过程中发挥了重要作用。     

一种低功耗高性能数据采集数字处理平台的设计

目的构建一套基于中频信号基带数字信号处理的软件无线电平台。方法通过选择芯片设计硬件电路设计出合适的PCB板。结果主要依据软件无线电平台,提出了一种基于A/D+FPGA+D/A的硬件设计方案,该系统包括了前端的A/D数据采集和后端的D/A模拟数据恢复的详细收发电路原理设计。结论构建了一个从前端数据接收到后端模拟发送的高速基带数字信号处理平台。     

Removal kinetics of phosphorus from synthetic wastewater using basic oxygen furnace slag

Removal kinetics of phosphorus through use of basic oxygen furnace slag(BOF-slag)was investigated through batch experiments. Effects of several parameters such as initial phosphorus concentration, temperature, BOF-slag size, initial p H, and BOF-slag dosage on phosphorus removal kinetics were measured in detail. It was demonstrated that the removal process of phosphorus through BOF-slag followed pseudo-first-order reaction kinetics. The apparent rate constant(kobs) significantly decreased with increasing initial phosphorus concentration, BOF-slag size, and initial p H, whereas it exhibited an opposite trend with increasing reaction temperature and BOF-slag dosage.A linear dependence of kobson total removed phosphorus(TRP) was established with kobs=(3.51 ± 0.11) × 10- 4× TRP. Finally, it was suggested that the Langmuir–Rideal(L–R)or Langmuir–Hinshelwood(L–H) mechanism may be used to describe the removal process of phosphorus using BOF-slag.     

Impacts of land use change on ecosystem service value in Lijiang River Basin,China

Environmental Science and Pollution Research - It is of great significance for the coordinated development of the environment and the economy to study the impact of the human driving factors of...     

Research progress on the association between environmental pollutants and the resistance mechanism of PARP inhibitors in ovarian cancer

Environmental Science and Pollution Research - The occurrence and progression of ovarian cancer are closely related to genetics and environmental pollutants. Poly(ADP-ribose) polymerase (PARP)...     

钢渣吸附-微波降解法处理碱性品红废水

研究了钢渣对碱性品红染料的吸附性能、影响因素以及微波对吸附在钢渣-焦炭上的染料的降解作用。实验表明,在中性条件下,钢渣对碱性品红具有优良的吸附性能,饱和吸附量可达到42．4mg／g。以钢渣处理质量浓度为100mg/L的碱性品红溶液,当固液质量比为1：50、振荡吸附1h后,染料溶液脱色率达97％。实验还表明,焦炭可吸收微波产生高温,用钢渣-焦炭混合物（质量比1：1）吸附染料后,以微波辐照可使物料达到665℃的高温,吸附的染料降解。吸附剂再生后重复使用4次,脱色率都达到95％以上。     

聚α-烯烃合成油的清洁生产工艺

针对聚α-烯烃合成油（PAO）生产旧工艺存在的问题,介绍了以固载化AlCl3为催化剂的PAO生产新工艺,考察了各种因素对PAO收率的影响。实验结果表明,在反应温度为100℃、反应时间为8h、A1C1,与α-烯烃质量比为10：75的条件下,PAO收率为48．8％。采用新工艺后,PAO产品质量有了明显提高,黏度指数为132,碱和白土的消耗为零,且没有废渣产生,可实现清洁化生产。     

搞好煤矿安全生产工作的建议

煤矿作为高危行业,安全始终是天字号的头等大事。从全国范围内发生的重特大事故来看,也主要集中在煤炭领域。泰安市是煤炭主要产区,因此,抓好煤矿安全生产工作,不仅能有效遏制和减少重特大安全事故的发生,也充分体现了代表最广大人民群众的根本利益,执政为民的具体要求。     

Spatial variation and toxicity assessment for heavy metals in sediments of intertidal zone in a typical subtropical estuary (Min River) of China

Environmental Science and Pollution Research - Sediment samples were collected in five marshes (C1, Phragmites australis marsh; C2, P. australis and Cyperus malaccensis marsh; C3, C. malaccensis...     

Bio-immobilization of Cu and Zn in recirculated bioreactor landfill

Purpose  

To protect the environmental quality of soil, groundwater, and surface water near the landfill site, it is necessary to make an accurate assessment of the heavy metal mobility. This study aims to present the bio-immobilization behavior of heavy metals in landfill and provide some reference suggestion for the manipulation of heavy metal pollution control after closure.