Integrated multi-tropic aquaculture(IMTA)systems have been used in China for many years and have achieved significant economic,social,and ecological benefits.However,there is still a lack of benthic bioremediation spe...Integrated multi-tropic aquaculture(IMTA)systems have been used in China for many years and have achieved significant economic,social,and ecological benefits.However,there is still a lack of benthic bioremediation species that can effectively utilize the aquaculture particulate organic waste in the system.Polychaete Perinereis aibuhitensis Grube is used as an environmental remediation species for large-scale aquaculture to reduce particulate organic waste,which is of great significance to environmental protection.To improve bio-elements utilization efficiency,P.aibuhitensis was applied for IMTA indoor fish(Hexagrammos otakii)farming.Results showed that in the system,production of 1 kg of the fish discharged 2141-2338 mg of carbon and 529-532 mg of nitrogen,while in the monoculture of the fish,the figures were 3033-3390 mg and 764-794 mg,or 24.84%-35.26%and 30.35%-33.32%less,respectively.This approach promoted IMTA technology that could utilize the particulate organic waste from intensive aquaculture and reduce the adverse environmental effects.展开更多
Converting CO_(2) into valuable chemicals is an effective means to alleviate environmental pressure and the depletion of oil resources.Among them,polymers derived from the copolymerization of PO and CO_(2) have been w...Converting CO_(2) into valuable chemicals is an effective means to alleviate environmental pressure and the depletion of oil resources.Among them,polymers derived from the copolymerization of PO and CO_(2) have been widely studied because of their excellent properties.To meet the expansion of the application range of CO_(2)-based polymers,regulation of the CU in the polymer is imperative.Based on the understanding of the relationship between catalyst synergy and structure,we designed a new generation of polyester-based polymeric catalysts APEPC-R and RPEPC-N with discretely distributed active centers to achieve the synthesis of CO_(2)-based polymers with regulated CU(from 50%to 90%).The discrete arrangement of catalyst active centers was demonstrated by 1H NMR and UV-vis characterization.Benefiting from multi-site synergy,high molecular weight(M_(n)>100 kg/mol)CO_(2)-based copolymers with CU among 50%—90%were successfully synthesized and their properties were firstly investigated.This work not only contributes to enriching the scope of the application of CO_(2)-based copolymers but also provides a new platform for the development of a new generation of catalysts.展开更多
基金Supported by the National Natural Science Foundation of China(No.41876185)the Major Agricultural Applied Technological Innovation program in Shandong Province(No.SD2019YY007)the Central Public-interest Scientifi c Institution Basal Research Fund,Chinese Academy of Fishery Sciences(No.2018GH15)。
文摘Integrated multi-tropic aquaculture(IMTA)systems have been used in China for many years and have achieved significant economic,social,and ecological benefits.However,there is still a lack of benthic bioremediation species that can effectively utilize the aquaculture particulate organic waste in the system.Polychaete Perinereis aibuhitensis Grube is used as an environmental remediation species for large-scale aquaculture to reduce particulate organic waste,which is of great significance to environmental protection.To improve bio-elements utilization efficiency,P.aibuhitensis was applied for IMTA indoor fish(Hexagrammos otakii)farming.Results showed that in the system,production of 1 kg of the fish discharged 2141-2338 mg of carbon and 529-532 mg of nitrogen,while in the monoculture of the fish,the figures were 3033-3390 mg and 764-794 mg,or 24.84%-35.26%and 30.35%-33.32%less,respectively.This approach promoted IMTA technology that could utilize the particulate organic waste from intensive aquaculture and reduce the adverse environmental effects.
基金financial support from the National Key Research and Development Program of China(No.2021YFD1700700)National Natural Science Foundation of China(Nos.51988102,22271275,22101277)Youth Innovation Promotion Association of Chinese Academy of Sciences(2023236).
文摘Converting CO_(2) into valuable chemicals is an effective means to alleviate environmental pressure and the depletion of oil resources.Among them,polymers derived from the copolymerization of PO and CO_(2) have been widely studied because of their excellent properties.To meet the expansion of the application range of CO_(2)-based polymers,regulation of the CU in the polymer is imperative.Based on the understanding of the relationship between catalyst synergy and structure,we designed a new generation of polyester-based polymeric catalysts APEPC-R and RPEPC-N with discretely distributed active centers to achieve the synthesis of CO_(2)-based polymers with regulated CU(from 50%to 90%).The discrete arrangement of catalyst active centers was demonstrated by 1H NMR and UV-vis characterization.Benefiting from multi-site synergy,high molecular weight(M_(n)>100 kg/mol)CO_(2)-based copolymers with CU among 50%—90%were successfully synthesized and their properties were firstly investigated.This work not only contributes to enriching the scope of the application of CO_(2)-based copolymers but also provides a new platform for the development of a new generation of catalysts.
