Expanding the valorization of waste mushroom substrates in agricultural production: progress and challenges

Environmental Science and Pollution Research - Waste mushroom substrate (WMS) generated in large quantities from mushroom production process has caused severe environmental pollution. As a...     

一种新型垃圾焚烧发电废水浓液的处理工艺技术

垃圾发电涉及烟气、废水、炉渣及飞灰的三废处理,如何在全厂工艺中合理消纳废水、这涉及各类设备新材料的应用以及结合生产中各种工艺的相互穿插应用,以便在工艺中的各环节,消纳废水。我国垃圾发电行业起步晚,各工艺独立且单一,本文以项目实例,在烟气处理工艺中,采用新型旋转雾化器,引入废水的浓液作为旋转雾化器冷却水,达到烟气处理与废水浓液处理两种工艺交叉,一起重叠处理,在烟气中蒸发,与常规垃圾电厂将浓液泵入石灰浆溶液中再达到旋转雾化器相比,开辟了一条有效的路径。     

氧化石墨烯抗菌性及生物安全性研究进展

氧化石墨烯是一种表面有丰富含氧官能团的石墨烯衍生物,具有与石墨烯相似的二维蜂窝状晶格结构,从而导致了其具有电学、光学、力学特性和良好的生物相容性,被广泛应用于材料学、生物医学和药物传递等诸多领域。因氧化石墨烯日益增多的生产和使用,其在空气、水和土壤中大量积累,引发了人们对其生物安全性的高度关注。以微生物、陆生动植物和水生动植物为分类标准,综述了近几年氧化石墨烯对微生物、动物和植物的毒性影响,总结并分析了三者的毒性机理,比较了不同生存环境下其对动植物毒性影响的不同,旨在更加全面地揭示氧化石墨烯的生物安全性,为氧化石墨烯安全使用剂量和其功能化应用提供一定的参考。     

Are energy conservation and emission reduction policy measures effective for industrial structure restructuring and upgrading?

The use of energy conservation emission reduction policies to promote industrial restructuring and upgrading and thus facilitate energy conservation and emission reduction is one of the 10 important strategies of environmental management in China. The use of energy conservation emission reduction policies to promote industrial restructuring and upgrading and thus facilitate energy conservation and emission reduction is one of the important strategies of environmental management in China. Based on the systematic collection of 1,195 energy conservation emission reduction policies, we discuss the influence of individual measure and measure synergy of energy conservation and emission reduction policies respectively. The results show that the energy conservation and emission reduction policies have a significant effect on the overall promotion of industrial upgrading. The financial measures and guidance measures have a positive impact; the financial measures and guidance measures have significantly positive effect; however, the administrative measures, fiscal tax measures, and other economic measures do the opposite; the positive effect of the synergy of guidance measures and financial measures is greater than the negative effect of considering only the synergy of fiscal tax measures and other economic measures, and significantly greater than the negative effect of the synergy of administrative measures, fiscal tax measures, and other economic measures. We should strengthen and emphasize the use of the measure that has positive effect on industrial structure restructuring and upgrading individually and synergistically.     

Simultaneous enhancement of sludge dewaterability and removal of sludge-borne heavy metals through a novel oxidative leaching induced by nano-CaO2

Environmental Science and Pollution Research - The production of sewage sludge with the presence of various contaminants has been a serious issue for the operation of wastewater treatment plants on...     

Intelligent bio-conversion of food waste by housefly larvae: a small-scale case in Nanjing,China

Journal of Material Cycles and Waste Management - This NOTE summarizes process, practical case, and perspectives of intelligent bioconversion via insect (housefly larvae) for treating food waste...     

卷式超滤膜在蓝藻收集中的应用

利用微孔滤布-卷式超滤膜组合工艺,构建蓝藻收集中试系统,用于处理高藻期富营养化水体。考察了高藻期该工艺的蓝藻收集效率、膜通量变化及膜污染状况。结果表明,该组合工艺在进水泵频率40 Hz,进水压力0.2 MPa的条件下,定期排蓝藻浓缩液实验和蓝藻连续浓缩实验的蓝藻截留率均能达到95%以上;6 d后定期排蓝藻浓缩液实验最低...     

Chemical and strontium isotope characterization of rainwater in Beijing,China

Major ion concentrations and Sr isotope ratios (⁸⁷Sr/⁸⁶Sr) were measured in rainwater samples collected at an urban site in Beijing over a period of one year. The pH value and major ion concentrations of samples varied considerably, and about 50% of the rainwater studied here were acidic rain with pH values less than 5.0. Ca²⁺ and NH₄⁺ were the dominant cations in rainwaters and their volume weighted mean (VWM) values were 608 μeq l^?1 (14–1781 μeq l^?1) and 186 μeq l^?1 (48–672 μeq l^?1), respectively. SO₄^2? was the predominant anion with VWM value of 316 μeq l^?1 (65–987 μeq l^?1), next was NO₃^? with VWM value of 109 μeq l^?1 (30–382 μeq l^?1).Using Na as an indicator of marine origin, and Al for the terrestrial inputs, the proportions of sea salt and terrestrial elements were estimated from elemental ratios. More than 99% of Ca²⁺ and 98% of SO₄^2? in rainwater samples are non-sea-salt origin. The ⁸⁷Sr/⁸⁶Sr ratios were used to characterize the different sources based on the data sets of this study and those from literatures. Such sources include sea salts (⁸⁷Sr/⁸⁶Sr～0.90917), soluble soil dust minerals originating from either local or the desert and loess areas (～0.7111), and anthropogenic sources (fertilizers, coal combustion and automobile exhausts). The high concentrations of alkaline ions (mainly Ca²⁺) in Beijing atmosphere have played an important role to neutralize the acidity of rainwater. However, it is worth noting that there is a remarkable acidification trend of rainwater in Beijing recent years.     

氨浸出含锌烟尘制取活性氧化锌

采用氨浸出法处理含锌烟尘,浸出液在微波-超声波联合作用下蒸氨得碱式碳酸锌沉淀,再经煅烧制得活性氧化锌.实验结果表明:在总氨浓度为9.0 mol/L、浸出温度为40 ℃、浸出液初始pH为 11.0～11.5、搅拌转速为400 r/min、浸出剂体积与含锌烟尘质量比为4、浸出时间为60 min的浸出条件下,锌的浸出率为83.3%.浸出液经过两段净化除杂后,在超声波功率50 W、微波辐射(微波功率随温度的设定而自动变化)的联合作用下,使溶液体系恒温90 ℃,进行蒸氨,沉淀得到前驱体碱式碳酸锌,经煅烧,得到平均直径为0.4 μm、晶型为六方晶系、片状的活性氧化锌.     

施工现场临时用电的通病及防治

建设工程施工用电最大的特点是“临时”。施工现场是临时的,竣工后就转移;施工人员是临时的,不同工种轮番作业,工人流动性大;施工机具是临时的,不同的分部工程所用的设备、机具各有不同,用完就撤;甚至施工供电设施也是临时的,随着施工的进展,供电设施需要经常拆装移位。