弯头拉延模的设计

弯头是某产品上的关键零件之一,用冲模成形为最佳方案。此文分析弯头的拉延工艺性,介绍弯头拉延模的结构特点,并提出在设计、制造、使用弯头拉延模时应重视的几个问题。对成批生产同类零件的单位具有较高的参考价值。     

天祝县地震监测网点建设及地质构造断层划分的探讨

地震监测网点建设与地质构造断层划分是地震观测和预报技术的一个重要组成部分。必须按照中国地震局地震台网前兆标准和甘肃省地震局台网建设规定，统一布设网点，打破行政区域界线，根据地震活动背景，从地震活动性、灵敏性、密集性，重要性构造差异，人口密度等因素布局设立地震监测网点。地震监测网点布局必须服从地震科研和预报的需要，有目地、有组织、有限度、有预测。本文以天祝县地震监测网点建设为实例，探讨了以上问题。     

粉煤灰的有效利用

介绍了我国粉煤灰利用状况及政策，结合实例分析了粉煤灰的有效利用和清洁生产对促进粉煤灰有效利用的作用。     

炼油厂废裂化催化剂的综合利用

炼油厂的催化裂化催化剂用过一段时间后就失去活性 ,卸出系统后成了废物 ,污染环境。该研究在实验的基础上介绍了综合利用方案 ,可达到变废为宝、增加效益、净化环境的目的     

天祝地震危险区划研究

研究天祝地震危险区划是一个综合性的课题。通过研究基本查清了自治县的地震危险家底,并进行了分析研究,得出了今后预防地震和主要防震减灾以及地震监测预报等方面的实施意见。揭示了本县的地域异常规律,划分了重点地震危险区。可见研究天祝地震危险区划分和强震预测、预报是很有意义的。     

废电池的环境污染及资源化价值分析

分析了各类废电池的资源化,安再生利用价值由高到低顺序依次为铅酸蓄电池、镍镉、镍氢电池、普通干电池。电池中含有的主要污染物质包括重金属以及酸、碱等电解质溶液。对环境和人体健康危害较大的废电池类别主要为：（1）含汞电池，指氧化汞电池，部分汞含量较高的锌锰和碱锰干电池；（2）铅酸蓄电池；（3）含镉电池，主要是Ni-Cd电池。废电池中化学物质释放进入环境过程是在电池包壳破损后发生的，或者是电池包壳本身发生浸蚀作用。普通家用干电池中的污染物质大多呈固态，由电池内部迁移到环境中是一种缓慢的过程。文中还分析了废电池污染环境的主要途径、采用各种不同处理、处置方式管理废电池可能引起的环境污染。     

炼厂常柴碱渣处理与利用

介绍了一种处理与利用炼厂常柴碱渣的方法,该方法实用、简单、速度快、成本低,经应用解决了碱渣的污染问题,并回收了可利用成分.     

Spatial Pattern Analysis of Regional Water Use Profile Based on the Gini Coefficient and Location Quotient

Water resources have become a barrier hampering socioeconomic development. Changes in the spatial distribution of water use profile have direct impacts to regional water use efficiency. However, the related research is inadequate, and a more suitable way to analyze regional water use profile is necessary. The Gini coefficient and location quotient, two reliable methods commonly used in discussing the spatial distribution of elements, were introduced and calculated. Taking Gansu Province as the study area, the concentration effect of industrial water use was the strongest, followed by domestic, environmental, and agricultural water use. However, a balanced distribution of agricultural water use failed to be coordinated with the production conditions, the center of Gansu’s grain production should be established to enhance the scale effect of agricultural production. The industrial agglomeration effect remained weak, and each region’s dominant industries need to be developed vigorously. Gansu’s domestic water use was consistent with its population distribution, but it is necessary to reduce the water use gap between urban and rural areas. With a growing awareness of environmental protection, environmental water use exhibited a more balanced distribution. Overall, the methods are simple and have good applicability, and the results can provide a reference in water use optimization.     

Preparation,Characterization, and Rapid Adsorption of Hg<Superscript>2+</Superscript> on Nanoscale Aramid-based Adsorbent

A series of nanaoscale aramid-based adsorbents were prepared by the functionalization of poly (p-phenylene terephthalamide) (PPTA) with different content of ethylenediamine (EDA). Their structures were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Metal ions, including Hg²⁺, Pb²⁺, Ag⁺, Cu²⁺, Cd²⁺, and Ni²⁺ were chosen as the models to explore the binding behaviors of PPTA–ECH–EDA in aqueous medium. Results showed that PPTA–ECH–EDA exhibited higher adsorption capacity for Hg²⁺ due to their nanoscale structures. In particular, the adsorption rate was so high that equilibrium was achieved within 15 min for Hg²⁺. The adsorption of Hg²⁺ on PPTA–ECH–EDA followed the pseudo second-order model well. Langmuir and Freundlich models were employed to fit the isothermal adsorption, and the results revealed that Freundlich isotherm was a better model to predict the experimental data. The adsorption mechanism was revealed by X-ray photoelectron spectroscopy. It is preconceived that PPTA–ECH–EDA could be used as an effective adsorbent for fast removal of heavy ions from wastewater.     

电化学辅助微电解法处理焦化废水

制备了锰粉改进的规整化微电解填料,采用电化学辅助改进微电解填料处理初始COD为6 153.6 mg/L、ρ(NH_3-N)为182.6 mg/L的焦化废水,优化了工艺条件。实验结果表明,电化学辅助微电解法处理焦化废水的最佳工艺条件为电压8 V,填料投加量20 g/L,初始废水pH 6,反应时间30 min。在此条件下废水COD去除率为75.3%,NH_3-N去除率为65.4%;在其他工艺条件相同的情况下,未通过电化学辅助的填料微电解反应的COD去除率为33.0%,NH_3-N去除率为16.2%,电化学辅助后的COD去除率和NH_3-N去除率均明显提高。