P＆T／GC／MS／SIS法在加氯消毒饮用水中痕量挥发性氯代烃测定中的应用

以吹扫捕集-气相色谱-质谱联用选择离子存储法(P&T/GC/MS/SIS)测定自来水中微量挥发性氯代烃,确定了最佳定性定量操作条件,同时探讨了改变原水中加氯量对三氯甲烷形成量的影响。当进样量为5.00mL时,四种氯代烃的线性范围为0～50ug/L,相关系数达0.9991以上;相对标准偏差RSD<9.8%;相对误差<7.6%,样品加标回收率为88%～128%,检测限在0.0006～0.26μg.L-1。方法操作方便,结果令人满意。     

油田水处理药剂研究进展

水处理剂是工业用水、生活用水、废水处理过程中所必需使用的化学药剂。介绍了缓蚀剂、阻垢剂、杀菌剂、絮凝剂四种水处理药剂在油田及石化工业中的研究应用现状,并分析提出了其发展趋势。     

50%乙酰甲胺磷WG的配制

以98％乙酰甲胺磷为原药，硅藻土为载体，进行了50％乙酰甲胺磷WG的配方研究。并对样品的分散性、润湿性、崩解性和稳定性进行测定，从中筛选出最佳配方：乙酰甲胺磷50％，十二烷基苯磺酸钠5％，木质素磺酸钠6％，尿素4％，硅藻土补至100％。实验证明：50％乙酰甲胺磷WG配方，其制剂性能优良。     

A new maritime lifesaving multiple-effect solar still design

This paper presents a new maritime lifesaving multiple-effect solar still design where several extended wicks feed seawater to their evaporating areas by capillary force, and the resulting water vapor diffuses and condenses on facing wicks with the condensate flowing through the wicks into storage bags. A theoretical analysis showed that a temperature drop through diffusion layers between evaporating and condensing wicks slowly increases in the main evaporating areas and rapidly near salt depositions whereas the evaporation rate decreases slowly in the main area and rapidly near salt depositions. These changes are caused by increases in salt concentrations and resulting boiling point elevation. With steady-state transfer analysis, the proposed still is predicted to produce about 15 kg m ⁻²d⁻¹ fresh water on a sunny day of 22 MJm⁻²d⁻¹ solar radiation, showing a potential to be a maritime lifesaving desalinator.     

Thermal properties measurements of renatured gelatin using conventional and temperature modulated differential scanning calorimetry

The thermal properties of amorphous gelatin films and gelatin films with renatured structural order were measured by using conventional and temperature modulated differential scanning calorimetry (DSC). Different amounts of gelatin structural order associated with a melting enthalpic change in the DSC measurement were prepared based on different gelatin drying conditions. Two consecutive heating and cooling DSC measurements on the gelatin films showed that there was no change in the glass‐transition temperature (T_g) for the amorphous gelatin but there was a decrease in the T_g for the structural gelatin on the second DSC scan. This decrease was attributed to the plasticizing effect from the release of originally hydrogen‐bonded water associated with the structural gelatin. In addition, a reversing endotherm observed upon melting of the structural gelatin during a temperature modulated DSC measurement indicated that the transition of bound water to free water occurred as the partial triple‐helix gelatin melted. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1795–1801, 2006     

High-performance dispersant of coal–water slurry synthesized from wheat straw alkali lignin

Environmental concerns have stimulated interest in utilizing plant-derived materials in various industrial fields. The main objective of the present study was to synthesize a new type of high-performance lignin series dispersant of coal–water slurry (CWS) from wheat straw alkali lignin (WAL), and determine the affecting factors in the reaction and the application performance for CWS preparation. The experimental results showed that the inherent viscosity and the sulfonic group content of the modified wheat straw alkali lignin (MSL) are the key factors affecting its dispersing effect for CWS. In the reaction, the reactant mass concentration and the sulfonating agent amount were changed to obtain the MSL with different inherent viscosities and sulfonic group contents, and the MSL with intermediate inherent viscosity (6.0 ml/g) and higher sulfonic group content (1.80 mmol g^− 1) was found to have excellent dispersing effect for CWS. The MSL obtained from optimized process was used as dispersant for CWS preparation, the studies of the properties of CWS showed that MSL has similar dispersing effect with naphtalenesulfonate–formaldehyde condensate, and far better dispersing effect than lignosulphonate. Recently this kind of new dispersant has been applied in several power plants in China.     

染料及中间体生产中的治理方法三废(Ⅰ)

由于我国染料及中间体行业近三十年来发展迅猛,而染料企业大多数是小型厂,染料品种繁多,在化工系统中,这一行业目前几乎是污染最严重、污染面最大、治理最差的。同时,一些发达国家把污染重、难治理的产品关停,转向发展中国家生产,染料中间体便是其中之一。所以我国大量的小型乡镇企业治理难度就更大了。不同染料生产原料、工艺过程不同,所排“三废”即有共同的特性,又有各自特点,因此需要针对各自的不同分别处理。本文从废气、有机废液和废渣、废水三方面详细叙述了工业上常用的治理方法及适用条件。并例举了几类排放量较大的废水的治理方法。     

良庄煤矿发展煤炭加工与综合利用的有效途径

良庄煤矿在发展煤炭加工与综合利用方面探索了一些有效途径 ,在洗选加工方面采用重介选煤工艺代替跳汰选 ,运行效果良好 ,利用浮选精煤制备水煤浆及燃煤锅炉改烧水煤浆、压滤煤泥发电及矸石制砖等方面均有显著的经济和环保效益     

浅谈水景元素在景观设计中的运用

水在自然界中,是重要的存在物质之一,也是人与自然之间互相联系的纽带。而水景元素,是现代景观设计中非常重要的组成,也是最富有表现魅力的艺术形式。水景元素在景观设计中的运用是十分广泛的,而且水具有很强的灵活性,变化形式丰富多样,在现代景观设计中是不可缺少的一部分。加强对于水景元素在现代景观设计中的研究与探讨,能够更好的促进现代景观设计的水平,催生出更多优秀的景观设计作品。文章介绍了景观设计中水景元素的一般类型以及特征,并阐述了水景元素在景观设计中的具体运用,以便在以后的景观设计中,更好的优化水景元素的设计。     

智能水滴算法研究

智能水滴算法是模拟自然界中河水与周围环境相互作用的过程而提出的一种智能计算方法。文章首先描述智能水滴算法的原理,然后综述智能水滴算法在多个研究领域的应用,最后对智能水滴算法进行总结与讨论。