硫化矿石自燃倾向性鉴定技术研究

根据硫化矿石自燃过程的复杂性,通过程序升温氧化（TPO）实验对硫化矿石吸附性能进行研究,提出了硫化矿石程序升温氧化（TPO）吸氧鉴定的方法,测试矿样温度从30℃到1000％条件下的总吸氧量和自热起始温度作为硫化矿石自燃倾向性鉴定指标,并对其进行分类;提出了基于支持向量机的硫化矿石自燃倾向性预测方法,通过预测建模最终达到了预期数据与实际数据的最佳拟合。     

海水中可溶性硫化物的快速分光光度法测定

在Zn(CH3COO)2和NaOH溶液固定硫化物和硼砂缓冲液加强沉淀效果的基础上,提出用离心法将硫化物从溶液中分离出来,采用亚甲基蓝法测定水样中硫化物浓度的方法.该方法具有速度快,操作简单,准确度和回收率高的特点,用于浑浊海水中硫离子测定,收到满意效果.     

Temperature dependence of the absolute rate constant for the reaction of ozone with dimethyl sulfide

Absolute rate constants for the reaction of ozone with dimethyl sulfide (DMS) were measured in a 200-L Teflon chamber over the temperature range of 283-353 K. Measurements were carried out using DMS in large excess over ozone of 10 to 1 or greater. Over the indicated temperature range,the data could be fit to the simple Arrhenius expression as KDMS = (9.96±3.61)×10-11exp(-(7309.7±1098.2)/T)cm3/(molecule·s). A compared investigation of the reaction between ozone and ethene had a kc2H4 value of(1.35±0.11)×10-18 cm3/(molecule·s) at room temperature.     

油气田开发中硫化氢产生机理和防治研究

文章概括总结了油气田开发生产中硫化氢的产生机理,论述了防治硫化氢的化学法、生物法和物理法,指出了油气田开发中硫化氢防治工作目前所存在的问题及今后的发展方向。提出加强现有各种方法的综合运用、开发新的防治方法,以及硫化氢防治措施的成套化、规范化、安全化是今后硫化氢防治工作的重要发展方向。     

大气中二甲硫等氧化的化学耦合作用

从遥远海洋到重污染地区在很宽的大气条件下,用灵敏度分析法研究了二甲硫（DMS）和SO2的氧化机理及其化学耦合作用,DMS最重要的氧化机理是OH自由基的摘氢反应,对SO2是SO2与OH自由基的反应。在DMS和SO2的氧化过程中,碳、氮、氧化合物的化学耦合作用起着根本性的作用,重要的化学耦合反应是OH自由基的生成反应、消耗反应和NOx等的光化学引发反应等。     

Monitoring of Aerial Pollutants Emitted from Swine Houses in Korea

This on-site survey study was performed to determine the concentrations and emissions of aerial contaminants in the different types of swine houses in Korea and then to present beneficial information available for Korean pig producers to manage optimal air quality in swine house. The swine houses investigated in this research were selected based on three criteria; manure removal system, ventilation mode and growth stage of swine. Mean concentrations of aerial pollutants in swine houses were 8 ppm for ammonia, 300 ppb for hydrogen sulfide, 2 mg m⁻³ for total dust, 0.6 mg m⁻³ for respirable dust, 4 log(cfu m⁻³) for total airborne bacteria and 3 log(cfu m⁻³) for total airborne fungi, respectively. Mean emissions based on pig (liveweight; 75 kg) and area (m²) were 250 and 340 mg h⁻¹ for ammonia, 40 and 50 mg h⁻¹ for hydrogen sulfide, 40 and 50 mg h⁻¹ for total dust, 10 and 15 mg h⁻¹ for respirable dust, 1.0 and 1.3 log(cfu) h⁻¹ for total airborne bacteria and 0.7 and 1.0 log(cfu) h⁻¹ for total airborne fungi, respectively. In general concentrations and emissions of gases were relatively higher in the swine houses managed with deep-pit manure system with slats and mechanical ventilation mode than the different swine housing types whereas those of particulates and bioaerosol were highest in the naturally ventilated swine houses with deep-litter bed system.     

化学填料塔工艺净化恶臭废气的研究

城市污水处理厂的恶臭污染已经引起越来越多的关注.介绍了城市污水处理厂的主要恶臭气体.采用氢氧化钠溶液和酸性氧化剂溶液作吸收剂,恶臭气体氨、硫化氢、甲硫醇通过二级吸收塔被吸收,气体达GB14554-93(二级)标准后排放.     

用甲基硫酸钠废渣制备二甲基硫醚

根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚（DMS）的方法。在反应温度100℃、加水量100mL、搅拌时间30min、合成反应时间50min的最佳工艺条件下，制得的DMS产品纯度为99％，收率为83．59％。该法工艺简单，技术可行，操作稳定，既消除了环境污染，又能制备化工产品，具有明显的环境效益和经济效益。     

碘量法测定硫化物实验研究

用碘量法测定了污水中的硫化物,实验探讨了加药次序、空白滤纸、滴定终点的判断问题。由实验结果可知:必须严格按照先加入碘标准溶液、再加入硫酸溶液的次序进行处理。空白实验中是否使用滤纸,其结果差异显著。在反应过程中,随着放置时间延长,硫化物测量值会增大。     

神农丹农药恶臭废气资源化治理研究

采用资源化治理方式,对神农丹农药废气进行治理研究,结果表明:选择安全环保的氧化剂,将具有恶臭气味的二甲基硫醚废气氧化成无臭的二甲基亚砜.通过对反应时间、物料配比、反应温度、铁屑催化的实验研究,优化了工艺条件,将二甲基硫醚彻底氧化为二甲基亚砜,使污染物变废为宝,并在华阳集团建成了治理装置,实现了资源化和无害化治理.