环保PPP的八维变量分析及在重金属污染治理中的应用

对PPP应用的主要领域做了分析,并对市政环保领域利用"八维变量分析法"进行了研究,分别从资产条件、项目条件、经营条件3个方向对投资强度、资产沉淀性、资产变现、供应预期、边界清晰度、付费模式、经营增值空间和公益偏见八个变量展开研究,对重金属治理的PPP应用进行了分析,提出重金属治理PPP领域主要存在于环境监测与检测、末端治理和环境修复市场。     

高压低流电化学深度处理砷氟废水技术研究

为解决企业外排生产废水砷氟超标问题,采用高压低流电化学技术对某矿山企业外排的含砷氟废水进行深度处理,研究考察进水pH值,电流密度,电化学反应时间、极板材料、絮凝反应、pH等工艺条件对处理效果的影响。得到2最佳工艺条件为进水pH5.5左右、絮凝pH6.5~7.0、电化学反应时间6 min,铁铝极板比例为1:2,电流密度10.9 m A/cm。处理出水中的砷、氟能稳定达到《地表水环境质量标准》(GB3838—2002)Ⅲ类水体水质标准要求。     

多氯联苯电容器焚烧系统预处理装置的工程设计

介绍了多氯联苯电力电容器焚烧系统预处理装置的工程设计及多氯联苯电力电容器切割装置实用新型专利技术 (专利号 96 115 4 4 9.7)的具体实施情况 ,并借鉴国外处理固体废物设备的设计 ,对切割后的电力电容器进行分选     

污泥厌氧消化的强化处理技术

污泥固体的生物可降解性低 ,影响了污泥的厌氧消化 ,提高厌氧消化效率的一个主要途径是促进污泥细胞的分解 ,增强生物可降解性 ,本文综述了强化污泥厌氧消化的几种预处理技术 ,包括热解、碱处理、臭氧氧化和超声处理     

絮凝沉降法强化处理城市污水的试验研究与探讨

通过絮凝沉降法强化城市综合污水的一级处理 ,该方法简易高效 ,运行灵活 ,出水水质稳定 ,对中低浓度的城市污水而言在技术上可靠 ,经济上可行。     

表面活性物质对HPMA阻垢缓蚀性能的影响

表面活性物质的加入可明显提高水解聚马来酸酐(HPMA)的阻垢、缓蚀性能,且不同表面活性物质影响程度不同,通过剩余硬度法测定阻垢性能,静态失重法测定缓蚀性能,从而比较异丙醇、葡萄糖酸钠对HPMA阻垢、缓蚀性能的影响。实验结果表明,异丙醇与HPMA复合使用时效果较好,阻垢率达到 79 0 %,缓蚀率达 70 7%,且阻垢率随Ca2 + 浓度增大而增大。     

我国城市垃圾处理现状与分析

城市垃圾已经成为我国面临的严重问题。本文对我国垃圾处理的现状进行了介绍,通过对其进行分析,提出了几点建议。     

用聚苯乙烯泡沫塑料废弃物调制油性腻子

以工业废弃物聚苯乙烯泡沫塑料及电厂粉煤灰为主要原料,用适量轻溶剂油调制成油性腻子,搅拌均匀经三辊机或轮碾机研磨至完全均匀细腻,包装即得产品。该产品的性能与同类油性腻子相似,而制造成本显著降低,适用于填平金属、木质、混凝土物体表面的凹坑、针孔和缝隙,同时减少了白色污染物聚苯乙烯泡沫塑料废弃物对环境的污染。     

Treatment and skin decontamination of sarin intoxicated mice

Abstract

This study aimed at evaluating the efficacy of oral treatment and skin decontamination with the mineral cationic carrier in sarin-intoxicated mice. Mice were contaminated with increasing percutaneous sarin doses and decontaminated. Furthermore, the surviving mice were treated per os. The behavioral patterns of the surviving animals were monitored for 72?h, including the animals’ posture, desire for food and water, and approach and touch response. The results showed the mineral cationic carrier to be capable of efficiently decontaminating animals percutaneous poisoned with triple lethal dose. The comparison of behavioral pattern of control animals against those treated per os showed statistically significant differences. Oral treatment with mineral cationic carrier may be a detoxification tool against nerve agents’ poisoning, and this merits further research.     

Microplastics removal strategies: A step toward finding the solution

• Physical, chemical and biological methods are explored for MPs removal. • Physical methods based on adsorption/filtration are mostly used for MPs removal. • Chemical methods of MPs removal work on coagulation and flocculation mechanism. • MBR technology has also shown the removal of MPs from water. • Global policy on plastic control is lacking. Microplastics are an emerging threat and a big challenge for the environment. The presence of microplastics (MPs) in water is life-threatening to diverse organisms of aquatic ecosystems. Hence, the scientific community is exploring deeper to find treatment and removal options of MPs. Various physical, chemical and biological methods are researched for MPs removal, among which few have shown good efficiency in the laboratory. These methods also have a few limitations in environmental conditions. Other than finding a suitable method, the creation of legal restrictions at a governmental level by imposing policies against MPs is still a daunting task in many countries. This review is an effort to place all effectual MP removal methods in one document to compare the mechanisms, efficiency, advantages, and disadvantages and find the best solution. Further, it also discusses the policies and regulations available in different countries to design an effective global policy. Efforts are also made to discuss the research gaps, recent advancements, and insights in the field.