我国ABS树脂工业废水治理技术综述

ABS树脂是一种新型高分子热塑性材料,用途极其广泛,我国自20世纪80年代引进ABS树脂生产技术。但是ABS生产过程中废水成分复杂,给治理工作带来很大困难。对全国各ABS生产企业废水组成、处理现状及发展趋势进行了现场调研和实验研究。结果表明,ABS酸性水与真空泵污水酸度、COD、悬浮物较高,污染物组成复杂是造成ABS废水难以处理的主要原因。大多数ABS生产企业废水均采用混合后进行单级絮凝气浮处理,不能实现达标排放。实验研究证明,解决ABS废水处理问题的关键是增设二级生物处理单元以及采用资源回收、清污分流、清洁生产等措施。     

利用连续-间歇曝气工艺处理生活污水的试验研究

在对污水进行回用处理时,须开发一种处理效果好、投资省、运行费用低、易管理的污水处理工艺,本试验研究采用改进的连续-间歇曝气工艺处理生活污水。经过4个多月的运行试验,结果表明:该工艺流程简单,无须预沉池、调节池和二沉池;对生活污水中COD的去除效果较好,在除磷脱氮方面都取得了理想的处理效果,COD去除率可达90.6%,氨氮去除率可达70.8%,总磷去除率可达96.1%。     

A Study of Physicomechanical and Morphological Properties of Starch/Poly(vinylalcohol) Based Films

Starch/Poly(vinylalcohol) blends in two different ratios (60:40 and 50:50) were prepared with glycerol as a plasticizer. Films were cast by a solution casting method. One set of films were filled with 10 wt% of unmodified bentonite clay and another set of films were crosslinked with epichlorohydrin in an alkaline medium. The prepared film samples were subjected to X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), mechanical characterization and scanning electron microscope (SEM). Significant changes in the tensile properties were observed depending on the different chemical constituents of the films. The presence of clay and crosslinking with epichlorohydrin were both found to have considerable effect on the morphology and mechanical property of the films. The SEM investigations, XRD analysis and FTIR studies revealed the interaction between the various chemical components of the films.     

脉冲式SBR法处理生活污水的脱氮特性试验研究

脉冲式SBR工艺是针对传统SBR工艺反硝化效果较差提出的一种新型的SBR运行方式。本试验在北京工业大学污水处理实验室采用真实的生活污水进行研究,考察脉冲式SBR在硝化-投加原水-反硝化这一循环反复过程中（等量进水）的脱氮性能。试验结果表明,出水TN〈2mg/L,去除率达到了96%以上。     

四川酸性土壤石灰需求量方法的比较研究

四川盆地的部分土壤由于酸性氮肥的大量使用以及雨水的冲刷淋蚀作用而呈现越来越酸化的趋势。故有必要通过化学法确定土壤石灰需求量。该研究的目的是比较SMP—SB、SLP—DB在确定四川酸性土石灰需要量上的准确度。并提出一种全新的确定土壤石灰需要量的方法，即滴定法。在四川盆地8处采样点采集的土壤分别用这3种方法确定石灰需要量。将土壤实际培养所得的石灰用量作为标准方法，再将上述3种方法的测定结果分别与标准法进行线形相关分析，得到与标准曲线之间的线形方程。结果发现3种方法与标准方法之间均成线性相关。在确定石灰需求量上都具有一定的准确度，但相对而言。文章提出的滴定法更准确。更适合确定四川土壤的石灰施用量。     

排污单位排污许可证申请说明示例研究

改革后排污许可制实施以来,积累了宝贵的经验和做法,也暴露出了技术层面操作的问题。文中从技术角度探讨分析排污单位的申请材料填报情况,结合有关要求创新性示范制定了“排污单位排污许可证申请说明”,以期做到排污单位“说得清”、核发单位“审得明”,提高排污许可证申请与核发效率。     

本溪大气黑碳气溶胶浓度的观测研究

对2008年3月至2009年2月本溪黑碳气溶胶浓度观测资料进行了研究分析.结果表明,本溪黑碳平均浓度值为6.877 μg/m3,日平均浓度变化范围为0.592～20.577 μg/m3,每小时平均浓度最大值达64.518 μg/m3;黑碳浓度具有明最的季节变化,夏季的平均浓度最低,最高值出现在冬季的1月份,这与冬季取暖...     

衡水湖湿地生态系统健康评价

在充分考虑衡水湖湿地实际情况的基础上,从湿地生态特征、功能整合性和社会经济环境三个方面的评价指标中筛选出24项指标,同时参考湿地生态系统健康评价体系,得出了适合衡水湖湿地的评价体系。通过专家咨询法计算出各指标的权重,运用多级模糊综合评价模型进行计算,并与指标评价标准进行对比,得出衡水湖湿地生态系统的健康状况和制约湿地健康的因素,在此基础上提出了衡水湖湿地的生态恢复和保护措施。     

文山县饮用水水源铁锰超标调查研究、处理方法及建议

结合文山县当前饮用水源中铁锰超标的实际情况，分析了周边环境对文山县饮用水水源地的影响，阐述了饮用水中铁、锰超标对人体健康的危害，提出了解决饮用水中铁锰超标问题的必要性和可行方法，并提出相关的对策和建议。     

Simultaneous size characterization and mass quantification of the in vivo core-biocorona structure and dissolved species of silver nanoparticles

Size characterization of silver nanoparticles with biomolecule corona(AgNP@BCs) and mass quantification of various silver species in organisms are essential for understanding the in vivo transformation of Ag NPs. Herein, we report a versatile method that allows simultaneous determination of the size of AgNP@BCs and mass concentration of various silver species in rat liver. Both particulate and ionic silver were extracted in their original forms from the organs by alkaline digestion, and analyzed by size exclusion chromatography combined with inductively coupled plasma mass spectrometry(SEC-ICP-MS). While the silver mass concentrations were quantified by ICP-MS with a detection limit of 0.1 μg/g, the effective diameter of AgNP@BCs was determined based on the retention time in SEC separation with size discrimination of 0.6-3.3 nm. More importantly, we found that the BC thickness of AgNP@BCs is core size independent, and a linear correlation was found between the effective diameter and core diameter of AgNP@BCs in extracted tissues, which was used to calibrate the core diameter with standard deviations in the range of 0.2-1.1 nm. The utility of this strategy was demonstrated through application to rat livers in vivo. Our method is powerful for investigating the transformation mechanism of Ag NPs in vivo.