BRICS Climate Cooperation in the Post-Paris Agreement Era

As representatives of emerging economies,BRICS countries are increasingly prominent in global governance.The rapid economic development of BRICS countries is accompanied by a significant increase in greenhouse gas(GHG)emissions,and BRICS countries are paying increasing attention to climate change issues and actively participating in the construction of the international climate regime.The Paris Agreement was a historic breakthrough in international climate negotiations,and since then BRICS countries have strengthened multilateral and bilateral cooperation in energy efficiency,agricultural emission reduction and climate governance financing.Due to the constraints of technology,cooperation mechanism construction,financing,and other objective conditions,BRICS countries still face some challenges to further advance the global climate governance agenda with their group power in the short term.Whether BRICS countries can further advance the global climate governance agenda as a group in the post-Paris Agreement era depends on whether they can improve energy efficiency and optimize their energy mix,and whether they can deepen cooperation in agricultural emission reduction and climate finance.BRICS countries need to continue to promote clean energy development and low-carbon economic transformation,deepen the potential of climate cooperation in agricultural emission reduction,and give full play to the climate financing role of the New Development Bank,so as to further enhance the level of climate cooperation.At the same time,BRICS countries can widely involve developing countries in climate governance cooperation and strengthen dialogue and exchanges with other countries,so as to promote global climate governance in the post-Paris Agreement era.

微生物絮凝剂提取方法的优化及其对废水中木质纤维类污染物的絮凝机理

利用芽孢杆菌生产的微生物絮凝剂配合助凝剂三价铁,在实际废水的处理中具有良好的应用潜力。为了更好地在实际废水处理中应用微生物絮凝剂,需要优化微生物絮凝剂的提取方法。实验结果表明,通过响应曲面优化法,最终可将微生物絮凝剂的产量由原先的0.5 g·L^(−1)提升至1.64 g·L^(−1)。最佳提取条件为:将培养好的培养液在50℃下超声6 min,处理结束后,调节溶液pH在9~11内,然后进行离心、醇沉等操作。微生物絮凝剂对烟草废水COD、氨氮去除率可分别达到50%和28%;对畜禽废水COD、氨氮去除率可分别到达85%和45%。此外,由于微生物絮凝剂的无害性,通过微生物絮凝剂干湿分离后的固体和液体部分可以分别作为有机肥和液体叶面肥再利用,从而可产生一定的经济效益。本研究可为环保絮凝剂的开发与应用提供参考。