大力推进城市资源循环利用基地建设——以北京市朝阳区资源循环利用产业基地为例

资源循环利用基地的建设是破解城市固体废弃物“邻避效应”的创新道路,有助于新型城市功能区的建设,是推进资源循环利用的主要方式。以北京市朝阳区资源循环利用产业基地为例,研究其基地建设的优势基础及制约因素,通过探索基地建设模式,分析了基地建设的总体思路和重要举措,以期为其他地区资源循环利用基地建设提供经验。     

Impact of land use on shallow groundwater quality characteristics associated with human health risks in a typical agricultural area in Central China

Environmental Science and Pollution Research - Groundwater pollution seriously threatens water resource safety due to high-intensity land use throughout the world. However, the relationship between...     

园区循环化改造的建设成效及实施过程探索

发展循环经济对缓解环境压力、促进产业结构调整、发展生态文明、践行五大发展理念具有重大的意义。园区是我国经济发展的重要支撑,也是我国发展循环经济的重点领域。介绍了园区循环化的改造方向、改造目标及园区循环化试点工作及实践成效,并总结概括了园区循环化改造的下一步重点工作,供后续工作参考。     

洪湖沉积物内源污染及其氮磷释放特征

为研究洪湖沉积物污染特征及内源营养盐释放规律,在不同季节对洪湖13个沉积物采样点进行调查,并利用柱状沉积物采样器原位采集沉积物开展静态模拟释放试验. 结果表明:①洪湖沉积物有机质、总氮和总磷含量的平均值分别为19%、4 407.4 mg/kg和1421.0 mg/kg,内源污染严重;②洪湖沉积物污染可能是水体中氮磷营养盐的重要来源之一,在5 d的静态释放模拟试验中,夏季上覆水中总氮和总磷平均浓度分别升高1.467和0.042 mg/L,冬季分别升高0.224和0.036 mg/L;③洪湖沉积物中氮磷的释放表现出显著的时空差异,夏季洪湖沉积物总氮、总磷的平均释放速率分别为133.9和4.0 mg/(m2·d),冬季分别为32.1和3.4 mg/(m2·d);④根据试验结果估算,洪湖沉积物氮的释放潜力为3 500~14 000 t/a,磷的释放潜力为350~400 t/a. 研究显示,在控制流域外源污染输入和减少湖区面源污染的同时,应从根本上改善洪湖水质并重塑洪湖湿地生态系统结构与功能,在科学指导下采取远近结合的方式分区域在洪湖开展受污染沉积物的修复工作.      

Inconsistent seasonal variation of antibiotics between surface water and groundwater in the Jianghan Plain: Risks and linkage to land uses

Antibiotics are widely used in humans and animals, but their transformation from surface water to groundwater and the impact of land uses on them remain unclear. In this study, 14 antibiotics were systematically surveyed in a complex agricultural area in Central China. Results indicated that the selected antibiotic concentrations in surface waters were higher in winter (average: 32.7 ng/L) than in summer (average: 17.9 ng/L), while the seasonal variation in groundwaters showed an opposite trend (2.2 ng/L in dry winter vs. 8.0 ng/L in summer). Macrolides were the predominant antibiotics in this area, with a detected frequency of over 90%. A significant correlation between surface water and groundwater antibiotics was only observed in winter (R² = 0.58). This study further confirmed the impact of land uses on these contaminants, with optimal buffer radii of 2500 m in winter and 500 m in summer. Risk assessment indicated that clarithromycin posed high risks in this area. Overall, this study identified the spatiotemporal variability of antibiotics in a typical agricultural area in Central China and revealed the impact of land uses on antibiotic pollution in aquatic environments.     

中国餐厨垃圾资源化利用系统建设现状研究

中国餐厨垃圾具有高油、高盐、含水率高、高有机质的特点,具备废物和资源两重性,将其单独回收利用十分必要。在分析餐厨垃圾回收利用、政策法规体系建设以及资源化技术现状的基础上,指出了资源化处理能力存在较大的缺口、缺乏国家层面统一立法、监管主体混乱等问题。基于现有的厌氧制沼、好氧制肥、生物转化以及综合集成技术的特点分析,得出协同厌氧处置、生物转化蛋白饲料、构建多元化技术体系以及产业联动集中布局是餐厨垃圾资源化技术的发展趋势。