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At present, the goal of "carbon neutrality" is concerned by all industries in China. As one of the representative carriers of new energy materials and devices in the transportation industry to achieve energy conservation and environmental protection goals, electric vehicles have made an important contribution to the realization of carbon neutrality in China. Power battery is one of the important components of electric vehicle, and its carbon neutral characteristics need to be explained urgently. In this paper, various environmental impacts of lithium-ion battery pack in the production stage were taken as the research object, and the life cycle assessment method was adopted to analyze the comprehensive impact of composition on the environment in the production process of lithium-ion battery. The results showed that FeS2SS battery pack had low environmental potential in 11 categories of tertiary indicators of resource depletion, toxic damage and footprint family. In other words, the FeS2SS battery pack had a low combined environmental impact during production stage. However, LFPy-C, NMC-SiNW and NMC-C contributed more to all environmental impact values. In order to achieve the goal of carbon neutrality and reduce carbon emissions, the production of NMC-SiNW, LFPy-C, NMC-C battery packs should be optimized. [ABSTRACT FROM AUTHOR]

The supervision and management of the reducing emission of total amount of major pollutants has made certain achievement in our country during the period of "Eleventh Five Years". NH3-N and NOx, which based on the original new target pollutants COD and SO2 were added with continuing to implement the emission reduction policies in the period of "Twelfth Five Years". In order to promote the supervision and management of the emission reduction progress successfully, urge the completion of the provincial reduction targets, and analyze the influence of regional social economy, industrial operation and other factors on the implementation of emission reduction targets, the pollutant emission reduction warning index system was established, which was based on the composite systems of social, economic, energy, environment. Then, by using Set Pair Analysis theory and method, the evaluation model can get the forecast evaluation and early warning analysis on the situation of the four major pollutants emission reduction at the end of "Twelfth Five Years". In addition, the application of the early warning model was improved according to the actual situation of pollutants emission of Xinjiang,Tibet and other regions where have some differences from other provinces. Finally, the warning evaluation results of the emission reduction will be shown clearly by using the GIS soft ware in order to develop the supervision and management of emission reduction. [ABSTRACT FROM AUTHOR]

Holographic quantitative structure-activity relationship( HQSAR) is an emerging QSAR technique with the combined application of molecular hologram, which encoded the frequency of occurrence of various molecular fragment types. and the subsequent partial least squares( PLS) regression analysis. In this paper, the acute toxicity data to the guppy( poecilia reticulanta ) for a series of 56 substituted benzenes. phenols, aromatic amines and nitro-aromatics were subjected and this resulted in a modol with a high prerfictive ability. The influence of fragment size and fragment distinction parameters on the quality of HQSAR model was investigated. The robustness and predictive ability of the model were also validated by leave-one-out (LOO) cross-validation procedure arid external testing data set. [ABSTRACT FROM AUTHOR]

Restoration and reconstruction of degraded riparian ecosystem caused by natural and anthropogenic disturbances is one of the important issues in restoration ecology and watershed ecology. The disturbances on riparian ecosystem include flow regime alteration, direct modification and watershed disturbance, which have different affecting mechanisms. Flow regime alteration affects riparian ecosystem by changing riparian soil humidity, oxidation-reduction potential, biotaliving environment, and sediment transfer; direct modification affects riparian vegetation diversity through human activities and exotic plants invasion; and watershed disturbance mainly manifests in the channel degradation, aggradation or widening, the lowering of groundwater table, and the modification in fluvial process. The assessment objects of riparian restoration are riparian ecosystem components, and the assessment indicators are shifted from ecological to synthetic indices. Riparian restoration should be based on the detailed understanding of the biological and physical processes which affect riparian ecosystem, and implemented by vegetation restoration and hydrological adjustment at watershed or landscape scale. To extend the research scales and objects and to apply interdisciplinary approaches should be the key points in the further studies on the degradation mechanisms and restoration of riparian ecosystem.

The characteristics for sorption of trichlorobenzene on sediment in Huaihe River (Jiangsu reach) was studied. It was also in vestigated at the same time that some factors of influence on the sorption, such as initial consistence of adsorbate, concentration of adsorbent and pH value, by ortho-experiment. The results indicate that the sorption isotherms of trichlorobenzene to sediment in Huaihe River (Jiangsu reach) are linear in the experiments condition,and distribution plays a leading role. The affected degrees of different environmental factors are different for sorption of trichlorobenzene on sediment in Huaihe River. The results of ortho-experiment are analysis with SPSS(Statistical Package for the Social Science) and the results are indicate that the affection of initial consistence of adsorbate is the biggest in all environmental factors,and initial consistences of adsorbate have expressly significant influence for sorption of trichlorobenzene on sediment in fresh water, and yet the pH has almost no influence for the sorption of trichlorobenzene on same sediment.

The single toxicities (24h-EC50) and mixture toxicities of 18 substituted biphenyls to Daphnia magna were tested. Quantitative structure-activity relationships (QSARs) were developed from the single toxicities. Octanol-water partition coefficient (IgK(ow)) model, theoretical linear solvation energy relationship (TLSER) model and quantum chemistry parameter model were built for these compounds. It was found that the quantum chemistry parameter model had a good predictive capability. The study of mixture toxicities of substituted biphenyls showed that the joint toxicity mechanism was concentration addition. Half effective concentrations of mixtures (EC50mix) were predicted according to concentration addition. The predicted and observed values coincided rather well.

Enrichment of volatile organic compounds(VOC) and semi-volatility organic compounds(SVOC) in surface microlayer(SM) of three drinking water sources were studied. The enrichment factor(EFs) were 0.67 to 13.37 and 0.16 to 136, respectively. The results showed some VOC and most SVOC could enrich in SM. Some EFs of SVOC was quite high. Suspension and temperature could affect EFs of SVOC, slim wind and water movement do not destroy enrichment of organic in SM.

Holographic quantitative structure-activity relationship (HQSAR) is an emerging QSAR technique with the combined application of molecular hologram, which encoded the frequency of occurrence of various molecular fragment types, and the subsequent partial least squares (PLS) regression analysis. In this paper, the acute toxicity data to the guppy (Poecilia reticulata) for a series of 56 substituted benzenes, phenols, aromatic amines and nitro-aromatics were subjected and this resulted in a model with a high predictive ability. The influence of fragment size and fragment distinction parameters on the quality of HQSAR model was investigated. The robustness and predictive ability of the model were also validated by leave-one-out (LOO) cross-validation procedure and external testing data set.