共查询到19条相似文献,搜索用时 109 毫秒
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以高校科研实验室排放的废水为研究对象,根据实验室废水的特点,选取硫酸铝、硫酸铁、聚合氯化铝(PAC)、聚合硫酸铁(PFS)和聚丙烯酰胺(PAM)5种絮凝剂研究混凝法处理的效果及主要工艺条件.结果表明:(1)PAC是处理实验室废水最合适的絮凝剂;(2)PAC混凝处理的最佳条件为投加量80 mg/L,pH 5,沉降时间30min.在此条件下,不同水质实验室废水的浊度去除率都在95%以上,CODCr去除率一般在40%以上;(3)混凝法作为实验室废水处理的一个单元,可以达到很好的处理效果. 相似文献
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目的 探讨矿山酸性含铜废水无害化处理方法.方法 研究了不同煅烧温度(100-500℃)、鸡蛋壳用量(10~40g/L)、鸡蛋壳粒度(0.10~1.00 mm)、搅拌速度(120~300 r/min)下,处理后的鸡蛋壳对东华理工大学溶浸实验室铜矿石溶浸废水和模拟矿山酸性含铜废水(Cu2 浓度为143.00 mg/L,pH值为1.80~2.00)的处理情况.结果 鸡蛋壳对含铜废水进行处理的最佳实验条件如下:煅烧温度为400℃,鸡蛋壳用量为25 g/L,鸡蛋壳粒度为0.25 mm,搅拌速度为240 r/min.鸡蛋壳可将2种酸性含铜废水的pH值由1.80~2.00提高到6.86~7.34,Cu2 的浓度降低到0.09~0.43 mg/L,符合GB 8978-1996<污水综合排放标准>规定的一级标准,去除率可达99.70%~99.94%.结论 用鸡蛋壳处理酸性含铜废水,工艺简单,操作方便,处理效果好,具有一定的应用前景. 相似文献
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微波法处理有机实验室废水的研究 总被引:1,自引:0,他引:1
采用微波催化氧化处理有机实验室废水,探讨了微波功率等因素对有机实验室废水处理效果的影响,获得了最佳工艺条件为:100 mL COD为4 632 mg/L的废水(初始pH=3)在微波功率为800 W下,辐射10 min,粉煤灰4 g,30%H2O2 1 mL,FeSO4 0.08 g的条件下,COD去除率达91.5%. 相似文献
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利用耗盐细菌治理高盐废水科研人员经过将适盐细菌用于一连串生物膜反应器发现了一种治理高盐废水的方法。实验表明,这项技术能治理含盐量高达14%以上的废水。高盐废水来源于有机化学产品制造、汽油生产及地下水处理。高盐废水的生物处理是极其困难的,主要是因为细菌... 相似文献
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目的:探讨铁路含油废水达标后回用于绿化,水中残留污染物在长期使用中是否在土壤和植物中富集,对土壤和植物有何影响,是否会造成污染。方法:按照国家的标准分析方法,对铁路含油废水回用于绿化对土壤和植物的影响进行了2年的研究。结果:对所监测的数据进行了统计学处理,精密度、准确度完全符合国家分析标准。结论:使用达到《铁路回用水水质标准》后的含油废水回用于绿化,对土壤和植物没有不良影响,不会造成污染。 相似文献
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目的:采用溶胶-凝胶法制备负载二氧化钛的多壁碳纳米管,对其结构进行X-射线粉末衍射(XRD)、透射电镜表征,探讨负载二氧化钛的碳纳米管用于腈纶废水的处理。方法:以300W中压汞灯为光源,在250ml的腈纶废水中加入100mg负载有TiO2的碳管光催化处理1h,废水的CODCr去除率达22%;经Fenton试剂进行预处理后,加入150mg载有TiO2的碳纳米管进行光催化实验,经光催化氧化3h后,CODCr去除率达到90%,处理效果非常明显。结果:实验结果表明,该种催化剂具有很好的光催化活性。结论:用Fenton试剂预处理与TiO2光催化联合使用,对含腈废水中的难降解有机物去除效果好,具有一定的实用性。 相似文献
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《中国医学文摘:卫生学分册》2008,25(6):381-384
水解酸化-好氧生物工艺处理制浆造纸综合废水;生物助剂在制浆废水处理中的应用研究;化学沉淀法去除垃圾渗滤液中氨氮的试验研究;曝气生物滤池去除水中氨氮的试验研究;特高浓度有机膦氨氮废水预处理工艺研究 相似文献
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汪德进 《中国卫生检验杂志》2008,18(4):639-641
目的:以稻壳灰为载体,采用溶胶一凝胶法制备负载TiO2复合吸附剂。方法:对其结构进行X-射线粉末衍射、扫描电镜表征,探讨其用于含Cr^6+废水的处理。结果:在常温下,对于初始浓度为50mg/L的含铬废水,pH值在较宽范围内,投加量为6g/L时,去除率可达到85%左右。结论:处理效果高于普通活性炭吸附法,处理后的水质达到了国家排放标准。 相似文献
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目的 通过源项调查判断101堆废水贮存罐的运行状态。方法 对废水贮存罐周围的地下水和土壤及转运泵房进行调查,通过现场测量和取样实验室分析,找出土壤污染严重的区域和辐射剂量水平较高的区域。结果 对废水贮存罐周围土壤及地下水分析结果表明,废水贮存罐在已往运行期间没有对周围土壤及地下水造成不良影响;对转运泵房调查结果表明转,运泵房区域土壤及转运泵房内部地面受到了不同程度的放射性污染。结论 总体上讲,101堆废水贮存罐运行状态良好。 相似文献
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P. M. Koenraad R. Ayling W. C. Hazeleger F. M. Rombouts D. G. Newell 《Epidemiology and infection》1995,115(3):485-494
In this study the distribution of phenotypes of campylobacter strains in sewage and surface waters was investigated by subtyping and by speciation of isolates from various aquatic environments. These environments included two municipal sewage plants (SPA and SPB) and waste water from a poultry abattoir (WWA). Both the sewage plants SPA and SPB collected domestic and industrial waste, and SPA received drain water from WWA. SPB received no waste water from any meat-processing plant. The isolates were speciated by PCR and subtyped by PCR/RFLP based on the flagellin PCR products. From all three reservoirs, no Campylobacter lari was isolated, and approximately 80% of the isolates could be identified as C. jejuni and the rest belonged to the C. coli species. The PCR/RFLP typing technique has a high discrimination level and was reproducible between two separate laboratories. The 182 isolates tested yielded 22 distinct Dde I profiles. The results indicate that strains with profiles found in poultry are also detectable in waste water presumed to be solely from domestic and human sources. In addition some strains were unique to the known poultry-related sources, suggesting that avian-specific strains, non-pathogenic to man, may exist in the environment. In contrast some strains were unique to human waste indicating the potential importance of non-poultry sources of infection. No seasonality was observed in the profile distribution. So, at least in the Netherlands, it is unlikely that infections caused by contaminated surface waters contribute to the seasonality of human campylobacteriosis. 相似文献
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Sources of biohazardous waste include not only large hospitals and laboratories, but also physicians' offices, dental offices, clinics, research facilities, surgery centers, veterinary offices, funeral homes, and a growing number of settings where home health care is delivered. State and local municipality definitions and regulations on biohazardous waste vary widely. Most regulations exempt home health care settings, but include physicians' offices. Although the infectious public health risk posed by medical waste is exceedingly low, this fact is not well understood by the general public. Physicians should develop biohazardous waste management programs that fulfill their county, state, and municipal regulations and that consider the difference between health risks to employees and risks to the general public. Physicians can considerably reduce the amount and costs of biohazardous waste disposal by proper identification and segregation of waste in a manner that meets their state's criteria. Using products that can be recycled may reduce the amount and costs of disposal of biohazardous waste. Processing costs also may be reduced by cooperative arrangements among medical groups or health care facilities to negotiate group disposal rates with vendors. 相似文献
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目的分析病原微生物实验室生物安全管理现状及解决对策。方法2019年5月—2020年1月对该区内5家病原微生物实验室生物安全管理作调查分析,包括病原微生物实验室备案管理制度硬件布局、医疗废物管理及实验室样品的内部运送与外部运输。结果5家病原微生物实验室备案制度还有很大的完善空间;第三方医学检验机构统一管理临床检验业务后,无论是检验质量还是硬件布局均得到很大程度的提升;人员管理差异较为显著,其生物安全管理与防护意识有待提升;医疗废物集中处理能力有限;样本运输缺乏智能化管理意识和能力。结论现阶段病原微生物实验室生物安全管理中存在的问题较多,需要重点从人员管理、制度完善及样本运输信息化建设等方面着手,以求提升病原微生物实验室生物安全管理质量。 相似文献
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M Manzurul Hassan Shafiul Azam Ahmed K Anisur Rahman Tarit Kanti Biswas 《BMC public health》2008,8(1):36
Background
Medical waste is infectious and hazardous. It poses serious threats to environmental health and requires specific treatment and management prior to its final disposal. The problem is growing with an ever-increasing number of hospitals, clinics, and diagnostic laboratories in Dhaka City, Bangladesh. However, research on this critical issue has been very limited, and there is a serious dearth of information for planning. This paper seeks to document the handling practice of waste (e.g. collection, storage, transportation and disposal) along with the types and amount of wastes generated by Health Care Establishments (HCE). A total of 60 out of the existing 68 HCE in the study areas provided us with relevant information. 相似文献15.
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生物医学类实验室是从事生物医学实验与科学研究的重要场所,是人才培养、科学研究和学科建设等的关键支撑平台,是推进国家科技创新战略的主要阵地。实验室安全是生物医学实验室管理的重中之重,也是其良好运行的最好保障。中国目前生物医学实验室安全现状及面临挑战主要有生物医学类实验室管理制度不完善,实验室人员安全意识薄弱,实验室试剂药品、仪器设备管理以及废弃物处理不规范等。为此提出解决生物医学实验安全的措施和对策主要有加强安全教育宣传培训,提高生物医学实验室工作人员的安全意识,建立健全管理管理制度,强化安全责任体系,加强组织保障,提升安全工作能力建设。建立安全工作奖惩机制也是有效地预防生物医学实验室安全事故的措施。 相似文献
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Naturally occurring radon exists in ground water and drinking water supplies. Many water testing laboratories provide measurements of radon in water for the public. No known national intercomparison program exists to verify the accuracy of the laboratories measuring radon in water in Maine or the Northeast. In recognition of this situation, the State of Maine Radiation Control Program sanctioned an intercomparison study for laboratories registered in Maine to measure radon in water. The University of Maine supplied each laboratory with water samples of various radon concentrations, served as the reference laboratory, and analyzed the results. Of the nine participating laboratories, eight use the liquid scintillation method while the ninth uses the E-PERM method to measure radon in water. Presented here are the results of this intercomparison study with a tabulation of the materials and methods used by the laboratories. The results from five of the nine testing laboratories showed significant discrepancies with those of the reference laboratory, typically due to low measurements. 相似文献
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