Have international remittance inflows degraded environmental quality? A carbon emission mitigation analysis for Ghana

Environmental Science and Pollution Research - Despite the considerable contributions of remittances to households and economic advancements, their environmental implications have received little...     

The combined toxicity and mechanism of multi-walled carbon nanotubes and nano copper oxide toward freshwater algae: Tetradesmus obliquus

Nanoparticles(NPs) are widely used for their special physical properties and released into the natural environment. When two types of NPs exist in the same environment, the presence of one type of NP may affect the properties of the other type of NP. This study investigated the toxic effects of multi-walled carbon nanotubes(MWCNTs) and copper oxide nanoparticles(Cu O NPs) on Tetradesmus obliquus. Both NPs had toxic effects on algae, and the toxic effects of MWCNTs were significantly stronger tha...     

区域可持续发展的人地关系探讨

本文从人的生存空间、活动空间以及人的生存活动、社会生产活动与自然环境的物质、能量、信息交流来论述人地关系，并且从人的生存与发展需求的角度讨论了人地关系矛盾的内涵与外在表现，进而提出了实现区域可持续发展的一般原则     

武钢贯彻实施OHSMS标准的探讨

论述了职业安全卫生管理体系(OHSMS)标准在规范安全管理、改善安全生产秩序中的重要保证作用，分析了公司目前的安全生产形势及存在的突出问题，探讨了武钢贯彻实施OHSMS标准的可行性和必要性。     

城市污泥中酚的测量不确定度及其符合性评定

为了给出日常检验接近符合限之测量结果的符合性结论,依据日常检测记录评估了4-氨基安替比林直接光度法测定城市污泥中挥发酚的测量不确定度。结果显示:曲线拟合、校准溶液配制、测量重复性和回收率不确定度为主要分量,体积与质量分量均可忽略;提高日常检验符合性评定能力水平的途径是努力提高校准曲线线性程度、尽量选用低浓度、低不确定度的标准储备液、对测量结果进行回收率校正。     

离子式静电消除器消电效果影响因素研究

目前离子式静电消除器在石化企业料仓粉体治理方面有较为广泛的应用,但在生产装置上未有应用的案例.文章对影响离子式静电消除器消电效果的因素进行了研究,包括空气湿度、正负极性放电、输送方式等.试验结果表明湿度会增加空气带载能力;通过一段管道输送后,离子被吸收较多,而此时正极性产生的离子消电能力更强.     

蛋壳处理洗涤废水中阴离子表面活性剂的试验研究

设计出以蛋壳为吸附剂的小型家用洗涤废水净化器处理洗涤废水,通过改变蛋壳的投加量、粒径、洗涤废水的流速,在动态实验的基础上考察蛋壳对洗涤废水中阴离子表面活性剂十二烷基苯磺酸钠(SDBS)的处理效果,研究过程中的SDBS含量采用荧光光度法检测.结果表明采用两级净化器装置处理SDBS效果较一级净化装置好,当两级净化器装置中蛋壳投加量为1 280 g,废水流速为0.25 L/min时,对SDBS的吸附率为73.4％.从本研究结果可以看出该家用废水净化器对洗涤废水处理具有现实意义.     

废酸再生装置尾气H2O2氧化法脱硝中试研究

为有效降低废酸再生装置尾气污染物NOx浓度,中海炼化惠州炼化分公司在l万吨/年的废酸再生装置尾气进行了H2 O2脱硝中试试验,以H2 O2为氧化剂,以钠碱为吸收剂,采用部分烟气加温激活H2 O2,产生大量的活性基团,从而氧化尾气中的NOx,生成高价态的NOx,然后用碱液吸收.结果表明:NOx脱除效率受停留时间影响,当采用填料塔时,停留时间达到4 s,脱除效率达到18％ ～21％;当采用填料-鼓泡工艺时,停留时间达到10 s～12 s,脱除效率可达到60％～70％,出口NOx浓度满足广东省地方排放标准要求.     

A case study of aggregation behaviors of titanium dioxide nanoparticles in the presence of dodecylbenzene sulfonate in natural water

The present work aims to ascertain the mechanisms of surfactant (dodecylbenzene sulfonate; DBS) effects on the aggregation behaviors of TiO₂ nanoparticles (TiO₂-NPs) in natural water samples. Aggregation experiments were conducted at a TiO₂-NPs concentration of 10 mg/L in deionized water and in natural water samples via dynamic light scattering and Zeta potential determination. Average attachment efficiency was calculated to compare the aggregation behaviors of nanoparticles in the two aqueous media. Results showed that the effects of DBS on aggregation could be interpreted by both Derjaguin–Landau–Verwey–Overbeek (DLVO) and non-DLVO mechanisms. In natural water samples, aggregation did not occur rapidly and was able to develop slowly under all conditions, and the roles of DBS were obvious at high DBS concentration owing to the impacts of inherent components of natural water samples, such as colloids and natural organic compounds. Future aggregation studies should concentrate on multi-factor, multi-colloidal and dynamic aspects under similar environmental conditions.     

1-(3-磺酸基)丙基哌啶十二烷基苯磺酸在CO_2捕集中的应用

合成了一种具有表面活性功能的离子液体1-(3-磺酸基)丙基哌啶十二烷基苯磺酸([PIPS]DBSA),采用FT-IR,1H NMR和元素分析等方法对产物进行表征,并将其用于促进CO2水合物的生成,考察[PIPS]DBSA对CO2水合物生成过程中温度和压力的影响.实验表明在温度4℃—6℃时,300 mg·L-1[PIPS]DBSA溶液中CO2的相平衡压力比700 mg·L-1的十二烷基苯磺酸钠(SDBS)溶液的相平衡压力下降了13.6%—14.96%.在4℃时,300 mg·L-1[PIPS]DBSA溶液中CO2压力稳定所用的时间与700 mg·L-1SDBS溶液相比减少了50 min,表明[PIPS]DBSA对CO2水合物的形成具有良好的促进作用.