Acoustic performance of near-rail low-height noise barriers installed on suburban railway bridges

Environmental Science and Pollution Research - With the large-scale construction of suburban railway viaducts, the noise problem along the viaducts is becoming more and more prominent. Conventional...     

Agricultural factor endowment differences and relative poverty nexus: an analysis of macroeconomic and social determinants

Environmental Science and Pollution Research - Poverty is a significant global ongoing issue that influences a substantial amount of people despite all efforts to eliminate or lessen it. Although...     

Health risk assessment of soil trace elements using the Sequential Gaussian Simulation approach

Environmental Science and Pollution Research - In this study, the performance of the Sequential Gaussian Simulation (SGS) approach was studied with the aim of accurately determining local health...     

An investigation of the pullout behaviors of tire strips embedded in tire-derived aggregate reinforced sand

Environmental Science and Pollution Research - The recycling of scrap tires has become an important issue in the area of environmental protection in the past 20 years. In recent years, tire strips...     

Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane fouling control

• Ceramic membrane filtration showed high performance for surface water treatment. • PTC pre-coagulation could enhance ceramic membrane filtration performance. • Ceramic membrane fouling was investigated by four varied mathematical models. • PTC pre-coagulation was high-effective for ceramic membrane fouling control. Application of ceramic membrane (CM) with outstanding characteristics, such as high flux and chemical-resistance, is inevitably restricted by membrane fouling. Coagulation was an economical and effective technology for membrane fouling control. This study investigated the filtration performance of ceramic membrane enhanced by the emerging titanium-based coagulant (polytitanium chloride, PTC). Particular attention was paid to the simulation of ceramic membrane fouling using four widely used mathematical models. Results show that filtration of the PTC-coagulated effluent using flat-sheet ceramic membrane achieved the removal of organic matter up to 78.0%. Permeate flux of ceramic membrane filtration reached 600 L/(m²·h), which was 10-fold higher than that observed with conventional polyaluminum chloride (PAC) case. For PTC, fouling of the ceramic membrane was attributed to the formation of cake layer, whereas for PAC, standard filtration/intermediate filtration (blocking of membrane pores) was also a key fouling mechanism. To sum up, cross-flow filtration with flat-sheet ceramic membranes could be significantly enhanced by titanium-based coagulation to produce both high-quality filtrate and high-permeation flux.     

Efficient degradation of semi-coking wastewater in three-dimensional electro-Fenton by CuFe2O4 heterocatalyst

Semi-coking wastewater contains a rich source of toxic and refractory compounds. Three-dimensional electro-Fenton (3D/EF) process used CuFe₂O₄ as heterocatalyst and activated carbon (AC) as particle electrode was constructed for degrading semi-coking wastewater greenly and efficiently. CuFe₂O₄ nanoparticles were prepared by coprecipitation method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy disperse spectroscopy (EDS). Factors like dosage of CuFe₂O₄, applied voltage, dosage of AC and pH, which effect COD removal rate of semi-coking waste water were studied. The results showed that COD removal rate reached to 80.9% by 3D/EF process at the optimum condition: 4 V, 0.3 g of CuFe₂O₄, 1 g of AC and pH?=?3. Trapping experiment suggesting that hydroxyl radical (?OH) is the main active radical. The surface composition and chemical states of the fresh and used CuFe₂O₄ were analyzed by XPS indicating that Fe, Cu, and O species are involved into the 3D/EF process. Additionally, anode oxidation and the adsorption and catalysis of AC are also contributed to the bleaching of semi-coking waste water. The possible mechanisms of 3D/EF for degrading semi-coking waste water by CuFe₂O₄ heterocatalyst were proposed.

     

Experimental research on atomization process and dust reduction performance of swirl pressure nozzle

Environmental Science and Pollution Research - In this study, experimental studies on atomization process and dust reduction performance of four swirl nozzles with different inlet/outlet diameter...     

Hydraulic conductivity of compacted manufactured sand tailings–bentonite mixtures: a new hydraulic barrier material

Journal of Material Cycles and Waste Management - The valorization of manufactured sand tailings (MST) with annual production of 4 billion tons is crucial to the healthy development of manufactured...     

Preparation of Pyridine Polyionic Liquid Porous Microspheres and Their Application in Organic Dye Adsorption

Journal of Polymers and the Environment - Adsorption is a common method to treat organic dye pollution in industrial wastewater. Selective adsorption and reuse can greatly reduce the waste of...     

油气田绿色矿山建设管理要求与实践

针对目前国家对绿色矿山建设的要求和环境保护面临的新形势,结合国内油气勘探与生产业务绿色发展的相关要求,阐述了油气田绿色矿山建设的发展历程、重点内容、建设标准;总结了绿色矿山建设形成的具体成果和经验,这些经验主要包括注重依法合规、提升绿色理念、科技创新、责任落实、多部门协作等,为下一步建设指导方向,进而提升国内油气勘探与生产业务整体绿色发展水平。