ICP-OES法同时测定蛋制品中铅、锌、铜含量

建立了同时测定蛋制品中铅、锌、铜三种金属元素等离子体原子发射光谱检测方法。样品经微波消解前处理后,处理液进ICP测定。结果显示:3种金属元素的线性范围较宽,相关系数均(r)为0.999以上,检出限分别为0.8、0.4和1.0 mg/kg。该方法稳定可靠、操作简单、试剂消耗量小。     

基于最小二乘支持向量机测定重油中金属含量

运用微波消解样品预处理技术,对训练集光谱测试数据进行小波压缩,然后用最小二乘支持向量机建立数学模型,并用检验集光谱数据考察模型的优劣,表明小波压缩—支持向量机建立的数学模型泛化能力好。试验表明,用建立的方法,测定重油中的铁、镍和钒,使测试时间由2 d缩短为5 h,与原子吸收的测试结果一致。     

槲皮素芸香糖苷废水处理技术研究

分别采用厌氧-SBR工艺和蒸发浓缩-SBR工艺对槲皮素芸香糖苷(芦丁)废水进行处理。发现经过厌氧—好氧生物处理后,COD由4 300 mg/L降到539 mg/L;而经过蒸发浓缩后COD由4 300 mg/L降到800 mg/L左右,再经过好氧生物处理后能降到50 mg/L以下。因此本文认为芦丁废水的合理处理方法是蒸发浓缩-SBR工艺。     

悬浮污泥过滤技术在海外油田采出水回注处理中的应用研究初探

悬浮污泥过滤技术集混凝沉降和过滤于一体。分析了大庆油田和胜利油田采出水处理站悬浮污泥过滤技术的应用效果和存在的问题。介绍了悬浮污泥过滤技术在伊拉克油田采出水处理中的应用现状,分析了影响净化效果的主要因素,并与传统油田采出水处理工艺进行了比较,     

Sewage sludge digestion at increased micropollutant content

Research was conducted, which aim was to evaluate quantitative and qualitative PCB changes in sewage sludge during mesophilic digestion, and the influence of those compound concentration above acceptable level (1.9 mg kg⁻¹ of sludge dry matter), also nickel and cadmium ions, on mesophilic digestion process. Before and after the digestion, concentration of seven PCB congeners, Ni and Cd in particular chemical fractions of the sludge was analyzed.     

A Review of Dehydration of Various Industrial Sludges

Wastewater characteristics and sludge generation potential of point source categories are reviewed critically. Novel industry-specific sludge dewatering/drying solutions necessary to establish a sustainable model are examined through a detailed literature survey. Knowledge of sludge properties is one of the most critical issues needed to design dewatering/drying equipment. This study focuses on industrial wastewater/sludge characterization. In addition, a comprehensive review of current drying models and technologies is also presented. A summary of the results derived from a novel thin-film-based photonic sludge dewatering/drying study is outlined as an alternative approach for industrial sludge control. Sludge was dried in a tubular quartz reactor (TQR), the inner surface of which was coated with a TiO₂ thin film. The TQR was irradiated with UV A, UV B, and UV C lamps. The consumed and generated energy fluxes through endergonic and exergonic reactions driven by photolysis and photocatalysis were investigated. In addition, the variations in sludge dewatering/drying characteristics were also examined and compared with conventional methods to evaluate the energy requirements.     

电子陶瓷材料元素分析的前处理方法研究

陶瓷材料,由于其耐高温、耐腐蚀、耐磨等性能优异,在各行各业应用相当广泛。但也正是因为它的这些特性,在使用化学方法进行元素分析时,会遇到样品难以消解的问题,导致测试无法进行。文章重点研究电子元件中常用的三氧化二铝、氧化锆类陶瓷材料的消解方法,并介绍使用ICP-OES对消解完全的样品溶液进行元素分析的注意事项。     

线路板污泥和电镀含铜废液同时处理回收铜的新工艺

作者开发出一套将线路板污泥和电镀含铜废液同时处理回收铜的新工艺,利用两种含铜废物自身的特性可以节约化工原料的添加,同时可以有效去除COD,以及实现铜和铁等杂质金属的有效分离,对铜的回收率达95%以上并制备出符合饲料级标准的五水硫酸铜,而且无三废排出。     

快速消解分光光度法测定工业废水COD试剂探讨

快速消解分光光度法[1]测定污水中COD是一种快速高效的分析方法,文章详细介绍了分别用快速消解仪专用试剂和自制试剂测定工业废水中的COD。结果表明,在COD值在40~1200 mg/L范围内,两种试剂测定的结果的线性关系几乎相同,相关系数都能达到1.000,同时都还具有很好的精密度和准确度。     

微生物在变压器油中的生长研究

取土壤样通过富集、分离、纯化等方法,得到能以变压器油为唯一碳源的好氧细菌和厌氧细菌,说明自然环境中的确存在能利用变压器油为碳源生长繁殖的细菌.在不同条件下,以变压器油为唯一碳源进行好氧和厌氧培养,当体系在无游离水条件下、温度≥50℃或pH值≤5.0时,微生物均不能生长繁殖,说明在变压器油工作状态下,微生物不能在其中生长繁殖.从运行中的介损值偏高的变压器中取油样,未检测出微生物.