利用低品质余热处理高含盐废水,实现废水“零排放”

2012年,我国颁布了新的《钢铁工业水污染物排放标准》(GB 123456-2012),新标准中主要水质指标有很大幅度的提高。环保部门不但对废水最终出水水质进行了要求,而且对废水排放总量和污染物排放总量进行了限制,故要求企业对废水站进行升级改造及深度处理回用,减少废水的排放量和污染物的排放量。目前钢铁企业的废水处理     

淀粉废水资源化工程改造技术

针对河北省某玉米淀粉生产企业产生的玉米浸泡废水,研究了采用离子交换法从玉米浸泡水中提取菲叮,使玉米浸泡水回用率达到100%。在原污水处理工艺基础上增加絮凝沉淀和气浮工序,可大大减少污染物,使处理后污水水质达到《污水综合排放标准》(GB8978—1996)—级排放标准。     

电化学技术在有色冶金含重金属废水处理的运用与实践

针对有色冶金废水水量大、种类多、水质复杂多变等特点,概述了目前处理重金属废水的主要技术方法,包括物理处理法、化学沉淀法、膜分离法、生物法和电化学法等,并重点探讨了电化学法处理铅锌冶炼废水的工业化试验和产业化运用情况。结果显示,利用电化学法处理铅锌冶炼废水系统自正式投入运行以来,运行稳定,处理后的出水水质中Pb、Cd、Zn、As等重金属污染物浓度均低于《铅、锌工业污染物排放标准》(GB25466-2010),且接近或达到《地表水环境质量标准》(GB3838-2002)Ⅲ类水标准。     

硫酸雾监测过程中的影响分析及处理措施

介绍了某铜冶炼企业废水来源及其 COD 浓度分布情况，采用物理化学法除去企业废酸废水中重金属和 COD 等污染物，并通过源头削减或者废水均质调节等方式，减少污水处理站压力，从而进一步降低污水处理站出水 COD 含量，达到企业内部回用水标准。     

某锑矿含重金属废水的处理

对锑矿废水处理常用工艺进行比选后,采用石灰-铁盐联合化学中和沉淀法处理该类型废水。工程实际运行结果表明,通过该工艺处理后,出水水质可达到《污水排放综合标准》(GB8978-1996)中一级标准的要求,锑的浓度符合《工业废水中锑污染物排放标准》(DB43/350-2007)中限值。该工艺处理效果稳定可靠,运行操作简单,出水水质达标。     

纳米制剂高效脱除冶炼污酸废水重金属技术的应用

铜铅锌冶炼生产中产生的污酸、废水中含有铜、铅、锌、镉、砷等重金属且浓度高、波动大、难以处理,传统处理工艺流程长、占地面积大,而且渣量大成本高。研究表明,纳米制剂对冶炼污酸、废水中的各种重金属脱除效果显著,可以实现重金属离子的深度脱除,处理后出水可以达到国家《铅、锌工业污染物排放标准》(GB25466-2010),《铜、镍、钴工业污染物排放标准》(GB25467-2010),低于或接近《生活饮用水水源水质标准》(CJ3020-93)。     

气浮-混凝沉淀工艺处理含重金属含油废水

采用"预处理气浮除油+混凝沉淀深度处理重金属"组合工艺处理某企业超声清洗工序产生废水,该废水具有酸性强、含油量高,并含有金属铜离子的水质特征。当进水COD、BOD_5、石油类、总铜平均浓度分别为450 mg/L、135 mg/L、100 mg/L、25 mg/L时,该工艺对COD、BOD_5、石油类、总铜的去除率分别达到86.7%、92.6%、97%、98%,出水水质满足《城市污水再生利用·城市杂用水水质》(GB/T18920-2002)标准后厂区内回用。     

镍钼矿冶炼废水的处理

对常用工艺进行比选,采用石灰-亚铁絮凝共沉淀法处理镍钼矿冶炼废水。针对该废水的特点,设计了一套污水处理工艺流程。工程实际运行结果表明,废水经该工艺流程处理后,砷、镍等主要污染物去除率可达99%以上,出水水质可达到《污水综合排放标准》(GB8978-1996)中的一级标准。该工艺运行稳定,操作简便,处理效率高,出水水质好。     

轧钢废水深度处理及生态化再生利用技术

人工湿地技术以其较低的运行成本及简便的管理模式近年来被广泛地应用在工业废水深度处理和污水的再生回用中.采用锰砂和砾石填料的人工湿地试验装置应用在轧钢废水深度处理中,并对污染物的去除效果进行了分析,利用人工湿地中的填料、微生物、植物协同作用研究轧钢废水中COD和总磷等污染物的去除效果,研究发现,经过湿地处理后,COD等出水水质指标能够满足《城市污水再生利用工业用水水质》(GB/T19923-2005)标准.     

高效催化电解法处理酸性重金属废水工艺的研究

文章通过自行开发的高效催化电解一体化装置处理酸性重金属废水,研究结果表明:产出净化水中锌浓度0.55～1.44 mg/L,铅浓度0.11～0.46 mg/L,镉浓度0.019～0.049 mg/L,COD浓度31.89～59.12 mg/L,均低于国家《铅、锌工业污染物排放标准》(GB 25466-2010)。净化水中的氯离子含量低于锌浸出工艺回用要求150 mg/L,酸性重金属废水经处理后可实现在有色处理工艺中最大限度的回用。该工艺简单,无需加入石灰等混凝剂,产生的泥渣量少,且泥渣中锌含量超过了18%,可通过回收泥渣中的锌,创造更高的经济效益。     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。     

抗腐蚀高强耐磨涂料研发与应用

介绍了抗腐蚀高强度耐磨涂料的研制和开发，以及用作柳钢球团回转烘干机刮板保护涂层的应用效果。