新型负载型纳米TiO_2光催化降解苯酚的试验研究

以岩棉为载体制备一种新型负载型纳米TiO2,对有机污染物苯酚的降解效果较好。岩棉对苯酚有一定的吸附作用。经过120min的处理,苯酚基本上被完全降解。流速对降解率的影响较大,本试验选择流速为5mL/min。初始浓度越小,苯酚的降解效果越好。通入O2和加入适量H2O2均有利于苯酚的降解,且少量的H2O2可使苯酚的降解率大大提高。苯酚在pH=4.5时降解效果最好。     

显像管玻壳铅尘污染特性的研究

以石家庄市显像管玻壳厂排放的铅尘为研究对象，通过在该玻壳厂周围土壤布点采样，较系统地研究了铅尘在大气和周围土壤中的迁移和转化规律，研究表明，用高斯模式能成功地预测铅尘在大气中的迁移扩散规律，玻壳厂周围土壤表层铅含量较大值出现在当地年主导风向（SSE，N）下风向，铅在土壤中的分布主要集中在0－20cm的耕作层，在20－40cm深度范围内，铅含量呈下降趋势，最大降幅达50％。     

玻璃生产企业废水综合利用的可行性探讨

本文分析了玻璃生产企业废水的来源,并从耀华玻璃集团实施的废水治理项目的实际出发,阐述了废水经过治理后综合利用的途径,实现废水的零排放,减少环境污染,节约水资源。     

用超滤膜分离技术从洗毛废水中回收羊毛脂

洗毛废水中含有重要的工业原料羊毛脂,不做回收处理排放到环境中就是＂三废＂,既污染了环境又浪费了资源.介绍了用超滤膜从洗毛废水中回收羊毛脂的工艺技术,经处理的洗毛废水CODcr去除率达95.5%,BOD5去除率达93.1%,有效的回收了羊毛脂,经济效益良好,符合国家环保产业政策.     

Charging behavior of glass beads using a spiral air type tribocharging apparatus that utilizes a Faraday cup

This paper introduces a novel tribocharging apparatus that utilizes a Faraday cup and experimentally investigates the charging behavior of glass beads. The novel apparatus mainly consists of four parts: an air supply part to control air duration and pressure, a powder supply part for setting the desired amount of powder (1 g in this experiment), a metal pipeline for generating a tribocharge, and a cyclone for collecting the powder that has passed through the pipeline. Four different sizes of spherical glass beads were used in this experiment. As for the results, the charge clearly increased as the glass bead particles passed through the pipeline for all four types of glass beads. The charge amount of the glass beads and the charge amount obtained from the pipeline had a very similar trend and absolute values. This confirmed the reliability of the test and showed that there was no disturbance due to external noise. In all of the tests, the net charge was observed to be negative for all glass beads. This agrees with the triboelectric series relating to the work functions of metals and glass particles. Smaller particles had larger charge amounts than did larger ones with good reproducibility. The charge amount of all glass beads increased as the supplied spiral air pressure increased.     

Effect of Recycling on Material Properties of Glass-filled Polyethylene Terephthalate

Recycled plastics are considered low performance materials because their properties are expected to decrease drastically with recycling. The objective of this study was to characterize a 15 wt.% glass filled polyethylene terephthalate (rPET-15GF) using six recycle generations and four recycle ratios. Mechanical properties such as tensile strength, elastic modulus, and percent elongation to failure of the PET composite were determined for various recycle generations and recycle ratios. Results show that the mechanical properties of rPET-15GF decrease slightly per recycle generation. In contrast, thermal properties of rPET-15GF were not at all affected by the recycling process. This data demonstrates that recycled glass filled PET can be used effectively to fabricate components without significantly affecting their mechanical performance.     

序列间歇式活性污泥法处理毛纺厂废水的研究

采用序列间歇式活性污泥法处理毛纺厂废水。试验结果表明,经4h曝气处理,进水COD为190～650mg/L时,出水COD始终低于100mg/L,去除率大多在80％～90％之间,色度去除率大多在50％以上,出水COD和色度均达到行业排放标准。还对较低COD浓度下序列间歇式活性污泥法的COD降解过程进行了研究,推导出一级反应动力学关系式Sr＝So（1－10￣^-k1^t）,并以试验数据进行了拟合,求解出动力学常数k1和So。     

Glass buildings on river banks as “polarized light traps” for mass-swarming polarotactic caddis flies

The caddis flies Hydropsyche pellucidula emerge at dusk from the river Danube and swarm around trees and bushes on the river bank. We document here that these aquatic insects can also be attracted en masse to the vertical glass surfaces of buildings on the river bank. The individuals lured to dark, vertical glass panes land, copulate, and remain on the glass for hours. Many of them are trapped by the partly open, tiltable windows. In laboratory choice experiments, we showed that ovipositing H. pellucidula are attracted to highly and horizontally polarized light stimulating their ventral eye region and, thus, have positive polarotaxis. In the field, we documented that highly polarizing vertical black glass surfaces are significantly more attractive to both female and male H. pellucidula than weakly polarizing white ones. Using video polarimetry, we measured the reflection-polarization characteristics of vertical glass surfaces of buildings where caddis flies swarmed. We propose that after its emergence from the river, H. pellucidula is attracted to buildings by their dark silhouettes and the glass-reflected, horizontally polarized light. After sunset, this attraction may be strengthened by positive phototaxis elicited by the buildings' lights. The novelty of this visual-ecological phenomenon is that the attraction of caddis flies to vertical glass surfaces has not been expected because vertical glass panes do not resemble the horizontal surface of waters from which these insects emerge and to which they must return to oviposit.     

Utilization of calcite and waste glass for preparing construction materials with a low environmental load

In this study, porous calcite materials are hydrothermally treated at 200 °C using powder compacts consisting of calcite and glasses composed of silica-rich soda-lime. After treatment, the glasses are converted into calcium aluminosilicate hydrates, such as zeolite phases, which increase their strength. The porosity and morphology of new deposits of hydrothermally solidified materials depend up on the chemical composition of glass. The use of calcite and glass in the hydrothermal treatment plays an important role in the solidification of calcite without thermal decomposition.     

General vs. domain specific recycling behaviour—Applying a multilevel comprehensive action determination model to recycling in Norwegian student homes

This paper reports the results of a multilevel structure equation model predicting general and fraction specific self-reported recycling behaviour. The model was tested on a sample of 697 undergraduate students from four Norwegian universities who each reported their degree of participation in the local recycling schemes for paper/cardboard, glass, metal, and plastic. It was demonstrated that variance in recycling behaviour can be divided into a smaller general part that is relatively stable across waste fractions and a specific part that depends on the respective fraction. General recycling behaviour is well predicted by intentions to recycle and recycling habits, whereas perceived behavioural control is to a large extend fraction specific and influences the fraction specific recycling. Perceived behavioural control mediates the influence of the recycling scheme type, distance to recycling containers, and transport mode used to reach the recycling containers.