Recently,Cafe Show China was held in Beijing.Relying on the accumulated exhibition experience and rich resources focusing on the global coffee industry for 10 years,the Cafe Show China has built an international profe...Recently,Cafe Show China was held in Beijing.Relying on the accumulated exhibition experience and rich resources focusing on the global coffee industry for 10 years,the Cafe Show China has built an international professional coffee brand culture display and product selection platform for the whole industry chain,and built an innovative and efficient exchange and trading bridge for many exhibitors and buyers.展开更多
After a three-year suspension, on December 13, 2005. authorities in Shenzhen again began accepting business applications for Internet cafes. The first batch of newly licensed cafes began operation in February. Accordi...After a three-year suspension, on December 13, 2005. authorities in Shenzhen again began accepting business applications for Internet cafes. The first batch of newly licensed cafes began operation in February. According to the local government's plan, 746 cafes will be opened in Shenzhen, in addition to the existing 314 licensed ones.展开更多
As younger consumers increasingly favor experiences over products,“curator”-led cafes and boutiques have emerged across China.Yet with growing pushback against overpriced,underwhelming offerings,is this fad already ...As younger consumers increasingly favor experiences over products,“curator”-led cafes and boutiques have emerged across China.Yet with growing pushback against overpriced,underwhelming offerings,is this fad already losing its appeal?展开更多
Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory polluta...Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory pollutantswas concomitantly produced,whichmay cause secondary environmental problemswithout proper disposal.We here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100%)and advancing organics removal(final TOC removal>70%)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe_(3)O_(4)@CaFe-LDH)nano-material.Cations(Ca^(2+)and Fe^(3+))concentration(≥30 mmol/L)and their molar ratio(Ca:Fe≥1.75)were crucial to the success of the method.Extrinsic nano Fe_(3)O_(4)was designed to be involved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxidation intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca^(2+)(originated from Ca(OH)_(2)added after oxidation process)and byproduced Fe^(3+)cations on its surface to in situ generate core-shell Fe_(3)O_(4)@CaFe-LDH.The oxidation products were further removed during Fe_(3)O_(4)@CaFe-LDH material formation via intercalation and adsorption.Thismethodwas applicable to many kinds of organicwastewater,such as bisphenol A,methyl orange,humics,and biogas slurry.The prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported CaFe-LDHs.This work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.展开更多
文摘Recently,Cafe Show China was held in Beijing.Relying on the accumulated exhibition experience and rich resources focusing on the global coffee industry for 10 years,the Cafe Show China has built an international professional coffee brand culture display and product selection platform for the whole industry chain,and built an innovative and efficient exchange and trading bridge for many exhibitors and buyers.
文摘After a three-year suspension, on December 13, 2005. authorities in Shenzhen again began accepting business applications for Internet cafes. The first batch of newly licensed cafes began operation in February. According to the local government's plan, 746 cafes will be opened in Shenzhen, in addition to the existing 314 licensed ones.
文摘As younger consumers increasingly favor experiences over products,“curator”-led cafes and boutiques have emerged across China.Yet with growing pushback against overpriced,underwhelming offerings,is this fad already losing its appeal?
基金supported by the Chinese Agriculture Research System(No.CARS-35-06B)111 Project(No.B17030)the Sichuan Science and Technology Program(No.2021ZDZX0012).
文摘Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory pollutantswas concomitantly produced,whichmay cause secondary environmental problemswithout proper disposal.We here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100%)and advancing organics removal(final TOC removal>70%)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe_(3)O_(4)@CaFe-LDH)nano-material.Cations(Ca^(2+)and Fe^(3+))concentration(≥30 mmol/L)and their molar ratio(Ca:Fe≥1.75)were crucial to the success of the method.Extrinsic nano Fe_(3)O_(4)was designed to be involved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxidation intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca^(2+)(originated from Ca(OH)_(2)added after oxidation process)and byproduced Fe^(3+)cations on its surface to in situ generate core-shell Fe_(3)O_(4)@CaFe-LDH.The oxidation products were further removed during Fe_(3)O_(4)@CaFe-LDH material formation via intercalation and adsorption.Thismethodwas applicable to many kinds of organicwastewater,such as bisphenol A,methyl orange,humics,and biogas slurry.The prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported CaFe-LDHs.This work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.
