plastic-alternatives Environment

11 个科学问题 · 环境生态 Environment

本页目录

化学回收相比机械回收在处理混合塑料上有何优劣?

What are the pros and cons of chemical versus mechanical recycling for mixed plastics?

化学回收通过解聚或热解处理受污染和混合废塑料,可得单体或油;但能耗与成本较高且规模有限。机械回收更节能,却难以处理多层复合与污染料。
Chemical recycling uses depolymerization or pyrolysis to handle contaminated and mixed waste into monomers or oil, but is energy-intensive, costly, and limited in scale. Mechanical recycling is more efficient yet struggles with multilayer and dirty streams.
难度 专业 · 适合 初中(12-15) CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:著录仅给书名,无版次与年份;同一书名常对应多个版次,不臆测具体版本。

《Nature Sustainability》塑料回收综述

Nature Sustainability recycling review

#化学回收 #机械回收 #循环经济

可降解塑料在自然海洋环境中真的能快速分解吗?

Do biodegradable plastics actually degrade quickly in the natural marine environment?

多数标注「可降解」的塑料需工业堆肥的高温高湿条件,在低温、缺光的海水中分解极慢。若误入海洋,其环境行为与常规塑料相近,难以短期消解。
Most labelled biodegradable plastics need industrial-compost heat and humidity; in cold, low-light seawater they fragment very slowly. In the ocean their behavior resembles conventional plastic over short timescales.
难度 专业 · 适合 高中(15-18) CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:著录仅给书名,无版次与年份;同一书名常对应多个版次,不臆测具体版本。

《Science》塑料海洋降解研究

Science plastic marine degradation

#可降解塑料 #海洋环境 #降解条件

为何塑料中的 PFAS 等添加剂被视为新关注的污染物?

Why are additives like PFAS in plastics emerging as pollutants of concern?

PFAS 用于塑料的不粘、防水和阻燃,极难降解且可在生物体内累积。它们在塑料回收中还会被带入新制品,扩大暴露途径。
PFAS are used in plastics for non-stick, water-repellent, and flame-retardant properties; they are persistent and bioaccumulative. Recycling can carry them into new products, widening exposure routes.
难度 进阶 · 适合 大众 CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:著录仅给书名,无版次与年份;同一书名常对应多个版次,不臆测具体版本。

《Science》全氟化合物综述

Science PFAS review

#PFAS #塑料添加剂 #持久性污染物

生产者责任延伸制度中的「差异化费率」如何激励塑料包装的生态设计?

How do modulated fees within extended producer responsibility incentivize eco-design of plastic packaging?

EPR 按包装的可回收性、再生料含量等设定差异化费率,难回收者缴费更高。这种经济信号促使企业在源头采用单一材质、易分离的设计以降低合规成本。
EPR sets modulated fees by recyclability and recycled-content, charging more for hard-to-recycle packaging. The economic signal pushes firms toward mono-material, easily separable designs that lower compliance cost.
难度 进阶 · 适合 大众 CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
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左玉辉 主编,《环境学》第2版,高等教育出版社,2009

Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009

#EPR #差异化费率 #生态设计

PHA 和 PLA 的生物降解条件有什么不同?

How do degradation conditions of PHA and PLA differ?

PHA 可在海洋、土壤等自然环境中被微生物降解;PLA 通常需要工业堆肥的高温高湿条件,在常温自然环境下降解极慢。
PHA biodegrades in marine and soil environments via microbes; PLA usually needs industrial composting's high heat and humidity, degrading very slowly in ordinary nature.
难度 进阶 · 适合 大众 CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:此条未指向带版次的可引用著作(通识性内容、机构文件或未展开的英文书名),本库不提供独立书目出处;如需精确引用,需由编辑补全具体篇目与版次。

Polymer Degradation 研究

polym degrad studies

#PHA #PLA #可降解

环境中微塑料的主要来源有哪些?

What are the main sources of microplastics in the environment?

微塑料来自大塑料的破碎,以及合成纤维洗涤、轮胎磨损、化妆品微珠等初级来源。它们已进入土壤、水体和食物链。
Microplastics arise from fragmentation of larger plastic and primary sources like synthetic-fiber washing, tire wear, and microbeads. They have entered soils, waters, and food chains.
难度 进阶 · 适合 高中(15-18) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
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左玉辉 主编,《环境学》第2版,高等教育出版社,2009

Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009

#微塑料 #来源 #污染

生物基塑料和可降解塑料是同一概念吗?

Are bio-based plastics and biodegradable plastics the same concept?

不是。生物基塑料指原料来自生物质,不一定可降解;可降解塑料强调在环境中能分解,可为化石基。两者需分别评估来源与末端。
No. Bio-based means feedstock from biomass and need not be degradable; biodegradable means it can break down and may be fossil-based. Source and end-of-life must be assessed separately.
难度 进阶 · 适合 初中(12-15) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

左玉辉 主编,《环境学》第2版,高等教育出版社,2009

Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009

#生物基塑料 #可降解塑料 #概念辨析

全球塑料公约谈判试图解决什么问题?

What problems does the global plastics treaty negotiation aim to solve?

该公约旨在建立具法律约束力的框架,统筹塑料全生命周期以减少泄漏与污染。核心争议包括是否限制原生塑料产量和 EPR 的全球落地。
The treaty seeks a legally binding framework covering the plastic life cycle to cut leakage and pollution. Key disputes include caps on virgin plastic and global EPR implementation.
难度 进阶 · 适合 初中(12-15) CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:此条未指向带版次的可引用著作(通识性内容、机构文件或未展开的英文书名),本库不提供独立书目出处;如需精确引用,需由编辑补全具体篇目与版次。

联合国环境大会第5/14号决议(2022)及UNEP塑料公约谈判(INC)官方文件

UNEA Resolution 5/14 (2022) and UNEP Global Plastics Treaty INC negotiation documents

#塑料公约 #全球治理 #污染控制

标着“可堆肥”的塑料在海洋里真的会降解吗?

Does 'compostable' plastic really degrade in the ocean?

多数“可堆肥”塑料按工业堆肥标准认证,需要 50°C 以上与特定微生物环境;冰冷缺菌的海洋中往往长期不降解,仍会造成塑料污染。
Most 'compostable' plastics are certified for industrial composting—over 50°C with specific microbes; cold, microbe-poor oceans often fail to degrade them, so pollution persists.
难度 进阶 · 适合 大众 CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

左玉辉 主编,《环境学》第2版,高等教育出版社,2009

Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009

#可堆肥 #海洋降解 #标签误导

工业可堆肥与家庭可堆肥认证在降解条件上有何差异?

How do industrial and home compostable certifications differ in degradation conditions?

工业可堆肥要求约 58℃ 与高湿的集中堆肥设施,家庭可堆肥则在较低常温条件下完成。两者误用会直接导致末端处理失效与污染。
Industrial compostable requires centralized facilities near 58°C and high humidity, whereas home compostable breaks down at lower ambient temperatures. Mislabeling leads to failed end-of-life treatment and contamination.
难度 进阶 · 适合 高中(15-18) CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source

出处备注:此条未指向带版次的可引用著作(通识性内容、机构文件或未展开的英文书名),本库不提供独立书目出处;如需精确引用,需由编辑补全具体篇目与版次。

欧盟 EN 13432 与家庭堆肥标准

EU EN 13432 and home compost standards

#可堆肥 #认证标准 #末端处理

微塑料是如何进入人体内部的?

How do microplastics get inside the human body?

主要通过食用受污染的食物(海鲜、盐、水)和吸入空气中的纤维与颗粒进入,部分能在肠道、肺部被检出,长期健康影响仍在研究中。
Mainly via contaminated food (seafood, salt, water) and inhaled airborne fibers and particles; they are detectable in gut and lungs, but long-term health effects are still studied.
难度 入门 · 适合 大众 CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

左玉辉 主编,《环境学》第2版,高等教育出版社,2009

Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009

#微塑料 #人体暴露 #摄入