催化湿式氧化法处理吡虫啉农药废水

自制了Cu／Mn，Cu／Ce，Cu／Ni，Ce／Mn，Ce／Ag等催化剂，经过性能比较，选择催化活性较高且金属溶出量较小的Cu／Ni作催化剂。用催化湿式氧化法处理吡虫啉农药废水，考察了各种因素对处理效果的影响。实验结果表明：在进水pH为6．93、Cu／Ni加入量为4．0g、反应温度为190oC、氧分压为1．6MPa、反应时间为120min的条件下，COD去除率为95％；处理后废水的BOD5／COD从0．093增至0．590，可生化性明显改善。     

臭氧氧化—湿式钙法吸收工艺对烟气的同时脱硫脱硝

采用臭氧氧化—湿式钙法吸收工艺对模拟烟气进行同时脱硫脱硝处理。O₃于150 ℃下具有较高的热稳定性,可将NO氧化为高价态氮氧化物,且NO氧化率随n（O₃）∶n（NO）的增大而逐渐提高。烟气中SO₂和H₂O的存在对NO氧化率的影响不大。O₃对SO₂的氧化率较低,约为5%。3%（w）石灰石浆液对SO₂的吸收率接近100%,NO_x吸收率随n（O₃）∶n（NO）的增大而逐渐提高,当n（O₃）∶n（NO）为1.6时NO_x吸收率可达约65%。SO₂能促进吸收液对NO_x的脱除。石灰石浆液中加入0.2%（w）的（NH₄）₂SO₃或Na₂SO₃后NO_x吸收率可达约85%或82%,且吸收率随添加剂加入量的增加而提高,添加（NH₄）₂SO₃的NO_x吸收率略高于添加Na₂SO₃。     

火电厂石灰石湿法烟气脱硫废水处理方法

阐述了石灰石湿法烟气脱硫（FGD）废水的水质特征，介绍了国内外普遍应用的化学沉淀去除脱硫废水中重金属、悬浮物等物质的工艺特点及其不足，并着重介绍了最新发展的流化床法、沉淀一微滤法等FCD废水处理新型工艺。     

湿法FGD湿烟囱工艺的问题及对策

介绍了湿法FGD湿烟囱工艺的可行性和选择该工艺时应考虑的问题，并提出了湿烟道、湿烟囱设计的基本要求。     

催化湿式氧化预处理造纸黑液

采用连续式固定床反应器,利用自制稀土类复合金属氧化物催化剂对草浆造纸黑液进行了催化湿式氧化(CWAO)预处理研究.通过正交实验确定了最佳工艺条件为:进水COD 40 800 mg/L,空速0.8h-1,反应温度260℃,反应压力6.5 MPa.在此最佳条件下进行实验,COD去除率达90％.经CWAO工艺处理后,草浆造纸...     

湿式电除尘技术及其在电厂的应用前景探讨

作为大气复合污染物控制系统的终瑞精处理技术装备,湿式电除尘器可用于控制PM2.5、酸雾、气溶胶、亚微米颗粒物、汞、重金属及二恶英等污染物的排放。论述了湿式电除尘器的工作原理、技术特点、结构及设计形式,探讨了湿式电除尘器在我国燃煤电厂的应用前景。     

紫外辐照-催化湿式过氧化氢氧化技术处理酸性大红GR染料废水

采用自制的负载型CuO-ZnO-CeO2/γ-Al2O3催化剂,常温常压下通过紫外辐照-催化湿式氧化技术处理酸性大红GR模拟染料废水。考察了催化剂加入量、H2O2加入量、废水pH、反应时间、初始酸性大红GR质量浓度等对废水脱色率的影响。实验得到最佳工艺条件为初始酸性大红GR质量浓度200mg/L,催化剂加入量10.0g/L,H2O2加入量2.0mL/L,废水pH4,反应时间2h。最佳工艺条件下废水脱色率达99.33%。     

Using a Bayesian network to clarify areas requiring research in a host–pathogen system

Bayesian network analyses can be used to interactively change the strength of effect of variables in a model to explore complex relationships in new ways. In doing so, they allow one to identify influential nodes that are not well studied empirically so that future research can be prioritized. We identified relationships in host and pathogen biology to examine disease‐driven declines of amphibians associated with amphibian chytrid fungus (Batrachochytrium dendrobatidis). We constructed a Bayesian network consisting of behavioral, genetic, physiological, and environmental variables that influence disease and used them to predict host population trends. We varied the impacts of specific variables in the model to reveal factors with the most influence on host population trend. The behavior of the nodes (the way in which the variables probabilistically responded to changes in states of the parents, which are the nodes or variables that directly influenced them in the graphical model) was consistent with published results. The frog population had a 49% probability of decline when all states were set at their original values, and this probability increased when body temperatures were cold, the immune system was not suppressing infection, and the ambient environment was conducive to growth of B. dendrobatidis. These findings suggest the construction of our model reflected the complex relationships characteristic of host–pathogen interactions. Changes to climatic variables alone did not strongly influence the probability of population decline, which suggests that climate interacts with other factors such as the capacity of the frog immune system to suppress disease. Changes to the adaptive immune system and disease reservoirs had a large effect on the population trend, but there was little empirical information available for model construction. Our model inputs can be used as a base to examine other systems, and our results show that such analyses are useful tools for reviewing existing literature, identifying links poorly supported by evidence, and understanding complexities in emerging infectious‐disease systems.     

湿式脱硫除尘技术在开发应用中的几点看法

当前,随着经济的快速发展,全国燃煤量不断增加,二氧化硫、烟尘超标排放已导致严重的环境污染问题.二氧化硫、烟尘排放量的控制,可采用选用清洁煤,改变燃烧技术及末尾脱硫除尘技术.比较而言,烟气除尘脱硫技术是一种技术成熟较为经济的应用技术.其中湿式脱硫除尘技术已得到广泛推广与应用,但该技术中仍存在不能消除黑烟、二氧化硫脱除不稳定因素多、设备腐蚀问题.本文通过对实际测试结果分析及脱硫效率影响因素的分析,提出了相应的看法与建议.     

铁活化过二硫酸盐湿法氧化去除一甲胺恶臭气体

CH₃NH₂(一甲胺)作为一种重要的工业原料而被大量使用,其嗅阈值低,具有刺鼻的鱼臭味,是一种典型的恶臭气体. 选取PS(过二硫酸盐)作为氧化剂,采用湿法吸收氧化去除CH₃NH₂. 在探讨CH₃NH₂的吸收性能的基础上,比较了4种方式〔Fe2+活化PS、CA(柠檬酸)螯合Fe2+活化PS、Fe0活化PS、CA联合Fe0活化PS〕对CH₃NH₂湿法氧化去除效果的影响. 结果表明:CH₃NH₂ 气体在酸性条件下易溶于水;单独用Fe2+或Fe0活化PS处理CH₃NH₂时,Fe0活化后的去除效果明显优于Fe2+;然而,在联合使用螯合剂CA之后,Fe2+活化的去除效果反而优于Fe0. CA螯合Fe2+的CH₃NH₂去除率由单独Fe2+活化时的32%升至64%,Fe0活化与CA联合Fe0活化去除率均提升至40%. 究其原因,可能是由于不同活化方式下Fe2+释放速率不同所致,释放速率直接影响了Fe2+的存在时间,Fe2+活化PS速率对于氧化去除效果有影响,并最终影响CH₃NH₂的脱除.