公众参与在环境影响评价中的问题与对策研究

识别公众参与在环境影响评价中存在的问题并提出建议意义重大。本文在系统回顾中国环评制度发展历程的基础上，对厦门PX项目和四川什邡事件进行再审视，分析发现目前我国环境影响评价中的公众参与存在时点滞后、效果不佳、信息公开制度不健全、参与权和知情权难以得到保障和满足、滞后于城市建设与经济发展速度等5方面问题。鉴于此，文章从4方面提出建议：一是强化公众参与环境影响评价的外部保障制度建设；二是完善公众参与环境影响评价的实施细则；三是建立环境影响评价公众参与决策的倒逼机制；四是加强环境宣传和教育，提升公民环境意识和参与能力。     

A review on SnFe2O4 and their composites: Synthesis,properties, and emerging applications

Tin ferrite (SnFe₂O₄) and their composites have been extensively studied due to their unique functional properties including appealing electronic band structure, good chemical stability, high magnetization, excellent biocompatible and earth-abundant nature. Over the past few years, SnFe₂O₄ and their composites have been well designed and investigated for various kind of applications. In this review, the most important methods for SnFe₂O₄ and their composites synthesis, such as co-precipitation, hydrothermal, solvothermal and sol-gel techniques are summarized. It is important to emphasize that this review mainly focuses on the application of SnFe₂O₄ and their composites for environmental remediation, lithium-ion batteries and hydrogen peroxide sensors, which are discussed in detail for the first time. Apart from that, the key factors and essential means to improve their performance and functionality are systematically reported. Finally, the development prospect and challenge of SnFe₂O₄ and their composites are introduced. It is anticipated that this review will be helpful in development of SnFe₂O₄ and their composites with ameliorated performances for practical application in various fields.