다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Catalytic ozonation for water and wastewater treatment: Recent advances and perspective.

Climate change is defined as the shift in climate patterns mainly caused by greenhouse gas emissions from natural systems and human activities. So far, anthropogenic activities have caused about 1.0 °C of global warming above the pre-industrial level and this is likely to reach 1.5 °C between 2030 and 2052 if the current emission rates persist. In 2018, the world encountered 315 cases of natural disasters which are mainly related to the climate. Approximately 68.5 million people were affected, and economic losses amounted to $131.7 billion, of which storms, floods, wildfires and droughts accounted for approximately 93%. Economic losses attributed to wildfires in 2018 alone are almost equal to the collective losses from wildfires incurred over the past decade, which is quite alarming. Furthermore, food, water, health, ecosystem, human habitat and infrastructure have been identified as the most vulnerable sectors under climate attack. In 2015, the Paris agreement was introduced with the main objective of limiting global temperature increase to 2 °C by 2100 and pursuing efforts to limit the increase to 1.5 °C. This article reviews the main strategies for climate change abatement, namely conventional mitigation, negative emissions and radiative forcing geoengineering. Conventional mitigation technologies focus on reducing fossil-based CO2 emissions. Negative emissions technologies are aiming to capture and sequester atmospheric carbon to reduce carbon dioxide levels. Finally, geoengineering techniques of radiative forcing alter the earth’s radiative energy budget to stabilize or reduce global temperatures. It is evident that conventional mitigation efforts alone are not sufficient to meet the targets stipulated by the Paris agreement; therefore, the utilization of alternative routes appears inevitable. While various technologies presented may still be at an early stage of development, biogenic-based sequestration techniques are to a certain extent mature and can be deployed immediately.

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Strategies for mitigation of climate change: a review

Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines.

Achieving superior electromagnetic wave absorbers through the novel metal-organic frameworks derived magnetic porous carbon nanorods

Crosslinked norbornene copolymer anion exchange membrane for fuel cells

Ball-milling treatment effect on physicochemical properties and features for cassava and maize starches

Activated carbon (AC) was modified by linear polyethyleneimine (PEI) to prepare polyethyleneimine modified activated carbon (PEI/AC) adsorbent, which was applied in the cadmium ions adsorption in wastewater. The results showed that PEI was successfully loaded on the AC surface, and the specific surface area decreased from 305.8 to 113.3 m²/g on the PEI/AC with 10 wt% PEI loading amounts. The positively charged amine group on the PEI molecule changed the surface ζ-potential from –38.3 to 11.1 mV. XPS analysis demonstrated that the adsorption mainly occurred on the –NH and –NH2 groups on the PEI/AC surface. The adsorption results showed that the adsorption capacity of PEI/AC for Cd(II) was greatly enhanced by the PEI loading, and compared with unmodified activated carbon, the adsorption amount of Cd(II) on the PEI/AC increased four times from 11 to 45 mg/g. The adsorption of Cd(II) by PEI/AC was a pH-dependent process with a maximum adsorption capacity of 45 mg/g at an initial solution pH of 6–7. The adsorption process was fitted with a Langmuir isotherm adsorption model and a pseudo-second-order kinetic equation, indicating the Cd(II) adsorption on PEI/AC was monolayer coverage, and the adsorption process was controlled by a chemical process. After five adsorption-desorption cycles, PEI/AC still exhibited a high adsorption capacity for Cd(II), indicating the adsorbent has good regeneration ability and could be recycled.

Polyethyleneimine modified activated carbon for adsorption of Cd(II) in aqueous solution

In situ DRIFTS study of O3 adsorption on CaO, γ-Al2O3, CuO, α-Fe2O3 and ZnO at room temperature for the catalytic ozonation of cinnamaldehyde

Global warming is mainly due to the massive emissions of greenhouse gases such as carbon dioxide (CO2) and methane (CH4), which should thus be limited in the future. For that, dry reforming of methane (DRM) is promising because this process uses CH4 and CO2. Ni-based catalysts have been recently developed for DRM, as a cheaper alternative to noble metal catalysts. Here, we review CO2 reforming of CH4 to syngas over nickel-based catalysts, with focus on the design and controlling factors. We discuss the microscale structure to overcome the bottlenecks of rapid carbon deposition and easy sintering. We present the four factors controlling the activity of Ni-based catalysts: 1) promoters, which improve the catalytic activity and reduce carbon deposition; 2) supports allowing to obtain highly dispersed active components and to limit metal sintering and carbon deposition at high temperatures; 3) preparation methods, which control particle size and dispersion of the active metal; and 4) bimetallic catalytic components, which improve the properties of nickel-based catalysts.

Xie Xinling

Papers

Crosslinked norbornene copolymer anion exchange membrane for fuel cells

Ball-milling treatment effect on physicochemical properties and features for cassava and maize starches

Polyethyleneimine modified activated carbon for adsorption of Cd(II) in aqueous solution

In situ DRIFTS study of O3 adsorption on CaO, γ-Al2O3, CuO, α-Fe2O3 and ZnO at room temperature for the catalytic ozonation of cinnamaldehyde

CO2 reforming of CH4 to syngas over nickel-based catalysts