Spatiotemporal changes and driving factors of vegetation in 14 different climatic regions in the global from 1981 to 2018

Environmental Science and Pollution Research - Climate change affects the change of vegetation, and the analysis of vegetation change and its drivers in different globe climate zones is important...     

Spatiotemporal dynamics of vegetation in China from 1981 to 2100 from the perspective of hydrothermal factor analysis

Environmental Science and Pollution Research - The increased growth of vegetation has the potential to slow global climate warming. Therefore, analyzing and predicting the response assessment of...     

Numerical simulation and experimental research of fractal suspended carrier based on nonlinear equation

Environmental Science and Pollution Research - The geometric structure of the suspended carrier is an important factor that directly affects the effluent quality of the moving bed biofilm reactor,...     

附加电场对中空纤维膜污染的减缓作用

通过对新型附加电场的中空纤维膜组件的实验室研究,探讨了电场对缓解微滤膜污染的作用.在恒定流量下过滤含有20mg/L腐殖酸的原水,无电压时,跨膜压力从0.0200MPa上升到0.0300MPa耗时2h,而施加60V电压时该时间段延长至10h.研究表明,原水中的腐殖酸在电场中发生电泳迁移,减少了向膜表面的移动,其对膜的污染被减缓;同时腐殖酸在电场中发生凝聚现象,沉积在膜表面形成疏松的滤饼层,是跨膜压力增加缓慢的另一原因.     

Drivers and barriers to engage enterprises in environmental management initiatives in Suzhou Industrial Park, China

Small- and medium-sized enterprises (SMEs) play an important role in sustainable development not only for their significant contribution to China’s economy, but also for their large share of total discharged pollutants. Therefore, this research takes the enterprises in Suzhou Industrial Park, China as the case study to investigate the environmental management practices of SMEs, and identify drivers and barriers to engaging businesses in environmental management initiatives. It is shown that, as in other countries, SMEs are less active in adopting environmental management initiatives than larger companies. Legislation remains the key driver to engage SMEs in environmental management initiatives. Based on the analysis, policy recommendations are also presented.     

表面活性剂异位淋洗法修复石油污染土壤

综述了表面活性剂在石油污染土壤修复中的应用情况,介绍了表面活性剂的卷缩和增溶作用机理,分析了在异位淋洗修复中的表面活性剂浓度、复配等影响因素,并对表面活性剂在石油污染土壤修复领域的研究和应用前景进行了展望。     

枯草芽孢杆菌胞外蛋白酶突变株的筛选及其拮抗作用

从小麦根际土壤中分离到一株对多种植物病原真菌有拮抗作用且产蛋白酶的枯草芽孢杆菌 Bacillus subtilis T2.经紫外线(UV)和硫酸二乙酯(DES)诱变处理,获得具有良好遗传稳定性的蛋白酶正负突变株.与出发菌株相比,培养48 h的正突变株胞外蛋白酶活力提高108.5%,负突变株蛋白酶活力降低81.1%,而二者的几丁质酶和β-1.3-葡聚糖酶活力均无显著变化.正突变株对棉花枯萎病菌(Fusarium oxysporum f. Sp. Vasinfectum)的平板拮抗作用增强,其粗酶液可使该菌菌丝变形膨大成珠状、原生质浓缩,萌发的孢子芽管短且畸形膨大;负突变株对该菌的平板拮抗作用显著降低,粗酶液对该菌菌丝和孢子的形态无明显作用.表明提高生防芽孢杆菌胞外蛋白酶的活力可增强其拮抗病原真菌的能力.     

污染土壤电动修复增强方法研究进展

污染土壤电动修复是一项新兴绿色原位修复技术。其原理是在土壤上施加直流电场 ,利用电迁移和电渗去除污染物 ,土壤pH、Zeta电位以及土壤化学性质等因素影响电动修复效果。为了提高修复效率和扩大电动修复应用范围 ,现在已经发展了针对不同类型土壤和污染物的增强修复技术。本文归纳总结了 1995年以来土壤电动修复中常用增强处理效果的 8种方法 ,即酸碱中和法、阳离子选择膜法、电渗析法、络合剂法、表面活性剂法、氧化 还原法、EK 生物联用和LasagnaTM法 ,且对每种方法的典型实验装置、增强原理、方法特点和适用范围等进行了分析和讨论 ,为以后的实验设计提供了有益的参考     

清洁过程环境影响评估模块的开发

在过程开发早期阶段考虑环境问题是实现污染预防的有效手段。将环境影响评估功能集成于过程模拟软件是一项重要的工作。以通用模拟软件ECSS—ChStar为平台,开发出环境影响评估模块。该模块可以对物质流、过程单元和总流程提供环境模拟分析,并计算过程方案的环境影响指数。     

纳米ZnO/PS薄膜的制备及光降解性能

利用纳米ZnO与聚苯乙烯(PS)高速共混法制备了一种在紫外光下具有自降解性能的复合薄膜.分析表明,经过KH570处理的纳米ZnO与PS通过化学键的方式桥联在一起.TG分析表明,复合薄膜的耐热性较PS有所提高;SEM图像显示0.5 wt％ ZnO在PS薄膜表面分布均匀,经过UV照射后薄膜表面出现光腐蚀现象.复合薄膜紫外光自降解实验表明:0.5 wt％ ZnO/PS薄膜在15W的紫外灯照射下,15d的自降解率为3.715％.