2 025 年 8 月 8 日， 华南理工大学 吴嘉燕 ，中国海洋大学 赵建 ，陕西师范大学 王艳华 等在 Cell 子刊 Cell Reports Sustainability 上发表了题为： Microplastics and nanoplastics on Mt. Everest 的研究论文，陕西师范大学为该论文第一单位。 该研究提供了全面的证据，表明了 微塑料 （MP） 和 纳米塑料 （NP） 已渗入珠穆朗玛峰生态系统的各个组成部分，这些微塑料/纳米塑料 改变了土壤微生物群 落，并通过牲畜进入食物链，对高海拔生态系统产生了潜在威胁，该研究还分析了珠穆朗玛峰微塑料/纳米塑料的来源， 提供了珠穆朗玛峰有关 微塑料/纳米塑料 污染的宝贵初步数据，为高海拔生态系统的塑料污染提供了新见解。 撰文丨王聪 编辑丨王多鱼 排版丨水成文 微塑料 （MP） 和 纳米塑料 （NP） 作为新出现的环境污染物，已无处不在。在世界各地，甚 至海 底、高山等偏远地区，以及人体各个组织中，都发现了它们 的存在。然而，微塑料和纳米塑料在 珠穆朗玛峰 上的数量、分布情况以及对环境的影响，在很大程度上仍未得到探索。 微塑料 （ Micro ...

Core Viewpoint - The article discusses an innovative method for chemically recycling mixed plastic waste into valuable chemical products, addressing the environmental challenges posed by plastic waste [2][3]. Group 1: Research Overview - The research, published in Nature, presents a strategy to convert eight common types of plastic waste into their original chemical components or other valuable compounds [3][10]. - The method focuses on identifying functional groups in mixed plastic waste to facilitate the separation and conversion of these materials into useful products [5][8]. Group 2: Methodology - The research team developed a solid-state NMR method to accurately identify the types of plastics present in the mixed waste, which is crucial for the subsequent processing steps [5][6]. - By using selective solvents, the team was able to dissolve and separate specific plastics from the mixed waste, followed by catalytic processes to convert these plastics into valuable products [6][7]. Group 3: Results and Innovations - The study successfully demonstrated the feasibility of the proposed strategy using a real-life plastic mixture, yielding various chemical substances such as benzoic acid, plasticizers, and hydrocarbons [7][8]. - The key innovation lies in the universal strategy designed to tackle the challenge of chemical recycling of mixed plastics, allowing for adjustments in chemical steps based on the initial identification of major components [8][10].

Group 1 - China's exports to ASEAN increased by 21% year-on-year in April, compensating for a 21% decline in exports to the United States due to high tariffs imposed by the Trump administration [1][3] - Exports to Southeast Asian countries, particularly Vietnam, Thailand, and Indonesia, saw growth of 20-30%, while exports to Singapore and Malaysia rebounded by 15% in April after a decline in March [1][3] - The transition period for U.S. tariffs has led to a surge in Vietnamese exports to the U.S., with a year-on-year increase of over 30% in April, prompting an increase in imports of raw materials from China [3] Group 2 - In Indonesia, the import of Chinese electric vehicles (EVs) surged, with sales reaching four times the volume of the previous year, accounting for 14% of new car sales [4] - The influx of low-priced Chinese products is causing disruptions in local industries in Indonesia, leading to factory closures and layoffs in the textile and footwear sectors [4] - Malaysia has implemented anti-dumping duties on certain Chinese imports, reflecting growing resistance against the influx of low-priced Chinese goods [4][5]

如果美国对这些关键矿产加征关税，并导致上述催化剂价格大幅上涨，那么炼油厂可能会改变其运 营方式以降低成本。如炼油厂可降低烷基化装置的开工率，转向生产甲苯或混合二甲苯，进而影响芳烃 市场。此外，烷基化装置和FCC装置开工率的变化将同时影响丙烯的供需。 萤石也是含氟化学品和含氟聚合物的上游原料。含氟化学品是聚氨酯等材料的发泡剂；含氟聚合物 （如特氟龙）在5G设备、半导体制造和锂离子电池中的重要性日益增加，还用作氢燃料电池和氯碱厂 的隔膜。 笔者还注意到，市场消息人士还担忧氧化钛被纳入征税范围。氧化钛是生产二氧化钛的原料，这使 得关税大棒开始影响美国涂料企业。此前，涂料企业已因美国对钢铁征收进口关税而备受成本压力，若 对氧化钛加征进口关税，将进一步增加涂料生产商的成本。 此外，特种催化剂也是值得关注的产品。如果美国对锑加征关税，聚对苯二甲酸乙二醇酯（PET） 的生产商可能提价，因为锑是PET生产的重要催化剂原料。同理，铋作为聚氨酯生产催化剂同样面临关 税风险。而根据美国地质调查局（USGS）的数据，包括铱、钕、铑、钌、镱和钇在内的多种矿产均用 于各类催化剂制造，而钯和铂则是汽车催化转化器的核心材料。可想而知，美国对 ...