一种新型沉降离心分离装置自控排液阀的设计

设计了一种新型的自控排液阀,来实现沉降离心分离装置中液体和悬浮物的连续分离和自动排出.从理论上论述了自控阀的工作原理,并对自控阀的可靠性进行了分析.讨论了有关参数对该阀动作的影响.设计的自控排液阀可使悬浮物的分离装置结构简单紧凑,实现高效、可靠的连续作业.     

中国加入WTO环保产业面临的机遇与挑战

中国加入世界贸易组织（ＷＴＯ）意味着中国将与世界上１３５个国家相互开放市场，对中国的环境保护、环保产业将来产生何种影响，文章进行了分析与阐述。总的结论是：机遇是主要的且具有深远意义；挑战是现实的且又不可回避。     

合理回收和再利用涤纶POY废油剂

洛阳石油化工总厂长丝车间POY废油剂原来是各条生产线分别收集，然后由污水处理场处理。设计合理的POY废油剂回收方案，将回收的POY油剂经多级过滤，再利用于生产，可以节约油剂消耗量，同时大大减少了环保处理费用。     

筛板塔气提法处理生产AC发泡剂的含氨废水

采用板塔气提法处理ＡＣ发泡剂发生中的含氨废水，研究了筛板塔不同结构对空气吹脱除氨效率的影响，以及在筛板中吹脱氨的工艺条件。试验结果表明，在常温常压下，废水中含氨浓度为８００ｍｇ／ｌ，ｐＨ＞１２气液比为１２００时，经一级塔板吹脱，氨的去除率≥９０％。     

用LCA方法评估城市“白色垃圾”的处置

对目前城市白色垃圾的 2种普遍处置方法———厌氧卫生填埋法和焚烧法进行了LCA分析评估 ,得出焚烧法可使环境负担相对较轻的结论。     

中美环境影响评价制度中公众参与的比较研究

公众参与是环境影响评价制度的重要组成部分,有利于取得经济效益、社会效益、环境效益的协调统一.相对于美国环境影响评价制度中已发展成熟的公众参与制度,中国公众参与还处在探索阶段.通过对中美环境影响评价制度中公众参与产生的背景的介绍,以及公众参与评价对象、参评阶段等内容的比较,指出中国环境影响评价制度中公众参与存在的不足.以期在美国立法具体、操作性强的基础之上,找出可供中国公众参与立法的借鉴之处,并提出了完善中国公众参与立法的建议.     

MnCeOx/diatomite catalyst for persulfate activation to degrade organic pollutants

Persulfate(PS)-based oxidation technologies are attracting increasing attentions in water treatment due to their high efficiency and stability.In this study,a novel diatomite supported MnCeO_x composite(MnCeO_x/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants.Results indicated that diatomite not only dispersed MnCeO_x and increased the specific surface area of catalyst,but also improved the low-valence metal site(Mn~(2+)and Ce~(3+)) and reactive oxygen species site(-OH) of MnCeO_x,thus enhancing the activities of MnCeO_x.MnCeO_x/diatomite/PS showed high efficiency for multiple dyes and pharmaceutical pollutants.Constant rate(k) of MnCeO_x/diatomite(k_(MnCeOx/diatomite)) was three times higher than the sum of constant rate of MnCeOx(k_(MnCeO_x))and constant rate of diatomite(k_(diatomite)).In addition,MnCeO_x/diatomite showed wide pH application(5-9).Cl~- and NO_3~(2-) had no effect while SO_4~(2-) and humid acid had slightly negative effects on MnCeOx/diatomite/PS system.Moreover,MnCeOx/diatomite showed good reusability and stability.Mechanism analyses indicated that electron transfer of Mn and Ce attributed to the activation of PS and oxygen to produce free radicals.SO_4·~-,·OH and O_2·~-on the surface of catalyst were the main active free radicals to attack pollutants.     

Ce-based catalysts used in advanced oxidation processes for organic wastewater treatment: A review

Refractory organic pollutants in water threaten human health and environmental safety, and advanced oxidation processes (AOPs) are effective for the degradation of these pollutants. Catalysts play vital role in AOPs, and Ce-based catalysts have exhibited excellent performance. Recently, the development and application of Ce-based catalysts in various AOPs have been reported. Our study conducts the first review in this rapid growing field. This paper clarifies the variety and properties of Ce-based catalysts. Their applications in different AOP systems (catalytic ozonation, photodegradation, Fenton-like reactions, sulfate radical-based AOPs, and catalytic sonochemistry) are discussed. Different Ce-based catalysts suit different reaction systems and produce different active radicals. Finally, future research directions of Ce-based catalysts in AOP systems are suggested.     

法律健全性对环境保护推行的影响研究分析

过去不健全的环境法律制度对环境保护的推进作用不明显,对环境污染企业的惩罚力度较低,健全的法律制度对环境保护可以起到一定的引导作用,对环境产业的组织管理机构起到全面组织和引导环境保护推行的作用;在提高经济发展的同时还能够带动国民其它行业和部门的发展。健全的法律制度可以很好的规范环保产业市场发展,创新环境的公共管理。通过《环保法》对环境治理做出了一系列要求,加强环境保护推进的力量,促使环保产业和经济快速发展。     

Phosphine production in anaerobic wastewater treatment under tetracycline antibiotic pressure

The influence of tetracycline(TC) antibiotics on phosphine(PH_3) production in the anaerobic wastewater treatment was studied. A lab-scale anaerobic baffled reactor with three compartments was employed to simulate this process. The reactor was operated in a TC-absence wastewater and 250 μg/L TC-presence wastewater for three months after a start-up period,respectively. The responses of p H, oxidation–reduction potential(ORP), chemical oxygen demand(COD), total phosphorus(TP), enzymes activity(dehydrogenase and acid phosphatase),and microbial community were investigated to reveal the effect of TC on PH_3 production.Results suggested that the dehydrogenase(DH) activity, acid phosphatase(ACP) activity and COD have positive relationship with PH_3 production, while p H, ORP level and the TP in liquid phase have negative relationship with PH_3 production. With prolonged TC exposure, decrease in p H and increase in DH activity are beneficial to PH_3 production, while decrease in COD and ACP activity are not the limiting factors for PH_3 production.