In this study,a porous biochar material derived from waste crab shell was prepared by one-step hydrothermal carbonization and acetic acid activation method at 180°C,which was characterized by SEM,BET,XRD and FTIR...In this study,a porous biochar material derived from waste crab shell was prepared by one-step hydrothermal carbonization and acetic acid activation method at 180°C,which was characterized by SEM,BET,XRD and FTIR.The results show that the as-prepared crab shell biochar(CSB)exhibits a fluffy irregular layered structure with abundant pores and oxygen-containing functional groups,which can facilitate the adsorption of diesel using CSB.In addition,batch adsorption experiments had been performed,effects of initial diesel concentration,adsorption time,adsorbent dosage and pH on the diesel adsorption using CSB were analyzed,which could be observed that CSB has high removal efficiency for diesel,and the maximum removal rate is up to 80.1%.The adsorption isotherms and kinetic studies were also investigated to determine the adsorption mechanism of diesel using CSB,the results show that the Langmuir model and the pseudo-second-order model are more suitable for describing the adsorption of diesel using CSB,indicating that the adsorption of diesel oil by CSB is monolayer chemical adsorption.This study will provide a theoretical basis for the high-value utilization of waste crab shell,which has a great potential in the treatment of oil spill.展开更多
In this work,carbonized mussel shell powder(CMSP)was modified by alkyl polyglucosides(APG)and rhamnolipid(RL)to render porous biomass a lipophilic surface,which was innovatively utilized as an environmentally friendly...In this work,carbonized mussel shell powder(CMSP)was modified by alkyl polyglucosides(APG)and rhamnolipid(RL)to render porous biomass a lipophilic surface,which was innovatively utilized as an environmentally friendly tableware cleaning material.The modified method was two-step hydrotherm-assisted synthesis.A contact angle meter was used to determine the surface hydrophobic property of modified samples(MTAR).The pore and the surface structure of CMSP and MTAR were characterized by BET,SEM,XRD,FTIR and XPS.The effect of removing oil was tested by gravimetric method.The results showed that the surface of MTAR was more porous and fluffier than CMSP,and the specific surface area is increased by 16.76 times.The results showed that when calcining CMSP at 1000℃,the oil removal rate of the synthesized MTAR is the best,and the decontamination rate can reach 87.05%.This research aims to develop a green and environmentally-friendly tableware cleaning material,solve environmental problems,and make full use of waste,which is very conducive to environmental protection.展开更多
基金This study was supported by the Fundamental Research Funds for Zhejiang Provincial Universities and Research Institutes(Nos.2019J00045,2019J00025)the General Research Project of Zhejiang Province Education Department(No.Y202044721)Key Research and Development Projects of Zhejiang Province of China(No.2018C02043).
文摘In this study,a porous biochar material derived from waste crab shell was prepared by one-step hydrothermal carbonization and acetic acid activation method at 180°C,which was characterized by SEM,BET,XRD and FTIR.The results show that the as-prepared crab shell biochar(CSB)exhibits a fluffy irregular layered structure with abundant pores and oxygen-containing functional groups,which can facilitate the adsorption of diesel using CSB.In addition,batch adsorption experiments had been performed,effects of initial diesel concentration,adsorption time,adsorbent dosage and pH on the diesel adsorption using CSB were analyzed,which could be observed that CSB has high removal efficiency for diesel,and the maximum removal rate is up to 80.1%.The adsorption isotherms and kinetic studies were also investigated to determine the adsorption mechanism of diesel using CSB,the results show that the Langmuir model and the pseudo-second-order model are more suitable for describing the adsorption of diesel using CSB,indicating that the adsorption of diesel oil by CSB is monolayer chemical adsorption.This study will provide a theoretical basis for the high-value utilization of waste crab shell,which has a great potential in the treatment of oil spill.
基金supported by scientific research fund of Zhejiang provincial education department(Y201942627)Zhejiang Provincial Universities and Research Institutes(No.2019J00025)Demonstration Project of Marine Economic Innovation and Development of Zhoushan City of China.
文摘In this work,carbonized mussel shell powder(CMSP)was modified by alkyl polyglucosides(APG)and rhamnolipid(RL)to render porous biomass a lipophilic surface,which was innovatively utilized as an environmentally friendly tableware cleaning material.The modified method was two-step hydrotherm-assisted synthesis.A contact angle meter was used to determine the surface hydrophobic property of modified samples(MTAR).The pore and the surface structure of CMSP and MTAR were characterized by BET,SEM,XRD,FTIR and XPS.The effect of removing oil was tested by gravimetric method.The results showed that the surface of MTAR was more porous and fluffier than CMSP,and the specific surface area is increased by 16.76 times.The results showed that when calcining CMSP at 1000℃,the oil removal rate of the synthesized MTAR is the best,and the decontamination rate can reach 87.05%.This research aims to develop a green and environmentally-friendly tableware cleaning material,solve environmental problems,and make full use of waste,which is very conducive to environmental protection.
