Assessment of the risk of excess sulfur input into terrestrial ecosystems of the Kola Peninsula

The tolerance of terrestrial ecosystems of the Kola Peninsula to atmospheric deposition of acid-forming sulfur compounds and the risk of their excess input into these ecosystems have been assessed on the basis of the critical load concept. The most sensitive ecosystems (critical sulfur load <400 equiv/ha per year) occupy 58% of the total area of the peninsula. These are mainly pine, spruce, and birch forests (including open and crooked birch forests) growing on podzols formed on sandy boulder-pebble glacial deposits. The zones of ecological risk cover the northwestern and central parts of the peninsula near the Pechenganikel and Severonikel combined works (20% of the total area).     

企业突发职业中毒事故应急物资准备研究

应急物资准备是突发职业中毒事故应急救援成功的关键因素。而我国企业目前普遍存在应急物资和资源配备不足、应急救援装备落后、老化等现象,这严重影响了突发职业中毒事故应急救援工作的有效开展。为在突发事件发生时能快速响应,企业必须做好应急物资准备工作。国家也应根据应急工作的特点,结合法律法规方面有关问题进行规定,以便从制度化、标准化方面入手,指导和进一步规范企业进行应急资源的配备。该文根据企业应急物资准备中存在的主要问题,提出了企业在充分危险评估的基础上,科学合理进行应急物资准备。国家也应不断完善并制订相应的应急资源准备标准,以指导和加强企业突发职业中毒事故应急救援物资的准备。     

裂解气脱硫新趋势

在回顾现有裂解气脱硫工艺的基础上，介绍了近年来国内外在该领域的研究和应用中所取得的进展及未来的发展趋势。     

废催化剂中金属的回收

简述了含有铂、钒、镍金属组分的废催化剂来源及金属回收工艺，介绍了萃取法在金属回收中的应用。     

三氧化硫磺化工艺用于DSD酸生产

用三氧化硫磺化工艺替代发烟硫酸磺化工艺是可行的。在ＤＳＤ生产中，采用干燥空气稀释三充气相磺对化硝基甲苯具有反应易控制，副反应少，产品质量好，对设备防腐要求低，投资省等优点，彻底解决了老工艺的废酸问题。     

解决硫酸尾气污染的两转两吸工艺流程

概述了采用两转两吸工艺流程，治理硫酸生产尾气的技术改造方案。实际运行结果表明，该工艺流程是实现将硫酸毛气二氧化硫污染消灭于生产过程中最有效途径。     

改性半焦烟气脱硫的机理研究

本文对海拉尔褐煤半焦及其水蒸气活化和高温氧化改性后的烟气脱硫性能进行了研究。     

THE EFFECTS OF MINE ACID ON THE POND RIVER WATERSHED IN WESTERN KENTUCKY1

ABSTRACT: H₂SO₄ (sulfuric acid) is formed by a chemical process that occurs in unreclaimed coal mines. The highly toxic acid then flows into the lower swamp areas where it causes considerable damage to the ecosystem. The major effect of the acid is the mass destruction of thousands of trees and various other phreatophytic plants. The contamination is so serious that most of the wildlife has migrated out of the affected area of the swamp in order to survive. Certain geological features such as coal bearing monadanocks make the area somewhat sensitive to mining activities and related geologic hazards. New methods of mine acid abatement make the concept of mass reclamation more realistic than at any time in the past. The constant annihilation of swamp life and processes emphasizes the urgent need for reclamation of the swamp.     

铅职业危害及其防治

通过对某铅冶炼厂职业铅危害情况及防治现状进行调查分析,提出了防治铅中毒、铅吸收的措施。     

从废催化剂中回收钼的新工艺

确定了用新型复合浸取剂从废催化剂中回收钼的最佳工艺条件废催化剂颗粒度１００目焙烧温度７５０℃,焙烧时间１ｈ复合浸取剂中助浸剂质量为５％,浸取固液质量比１：３,浸取温度６０℃,浸取时间６ｈ,在该条件下,钼的浸取率达到９２．７％～９５．５％。