Sulfur dioxide-hydrogen peroxide relationships and acidification of precipitation in Guiyang area-a case study

-The concentrations of gas phase SO2, O3 and chemical composition of sequential rainwater samples were measured on 6/11/88 to 6/28/88 at some sites of Guiyang area. S (IV) was present in great excess of H2O2 in rainwater samples collected at residential sites of the city corresponding to high level of gas phase SO2. Considerable H2O2 in rainwater samples was observed in background air at suburbs. The evidence that clean rainwater samples were collected at 20km away from the city in 6/18/88 precipitation event revealed that the major process of acidification of the rain in the high polluted areas was below-cloud scavenging of trace gases. From a simulation calculation it was found that the rate of oxidation of S(IV) by O3 and by Mn2+, Fe3+ catalytic in high pH rainwater is significant, but for low pH the major SO42- is produced by the reaction of S (IV) with H2O2.     

LS—931Al2O3基硫磺回收催化剂的工业应用

LS－931催化剂是新开发的Al2O3基硫磺回收催化剂，经洛阳炼油厂5000t/a装置使用考察结果证实其具有高活性和稳定性运行的特点。在第一转化器使用LS－931Al2O3基催化剂及在第二转化器仍然使用旧的LS－811Al2O3催化剂的情况下，与原来单纯使用LS－811Al2O3催化剂相对比，装置总硫转化率可提高1％左右，有机硫水解率达到96.4%，尾气中的硫化物含量则稳定地降至1％（V）以下。     

Control strategy for sulfur dioxide and acid rain pollution inChinaa

Several factors, namely, coal-dominated primary energy mix, extensive economic development mode, inefficient energy utilization, end the imperfect environmental regulations, result in the serious urban sulfur dioxide pollution end large-scale sulfatetype acid precipitation in China. In 1995, China's sulfur dioxide emissions reached 23.70 Mt, and the areas affected by acid rain accounted for 40% of the territory. Chinese government accords considerable importance to the sulfur dioxide end acid rain contamination. New sets of environmental friendly policies have been promulgated. But enforcement of laws and regulations on SO2 emissions need to be further improved and broadened, especially those respond to market conditions. This paper focuses particular attention on the analysis of strategy, policies, and national actions which had or should be taken against sulfur dioxide emissions nationwide to achieve the environmental targets, on the basis of which gives the technical options in future.     

洁净型煤技术及推广应用探讨

洁净型煤的推广使用是有效控制煤烟型污染的一种重要手段，采用在原煤中添加化学药剂，重新加工成型的方法，达到降尘、固硫、节能的目的。通过推广使用，有效的降低二氧化硫、烟尘的产生量和排放量，减少对城市大气环境的污染，达到煤的热量高效、清洁利用。     

从钛铁渣中回收钛和铝——(二)回收铝

提出了一种从钛铁渣中提取大量铝的方法.研究了将钛铁渣酸解液中大量铝合成洗涤助剂用4A沸石的工艺条件,得到了合格的4A沸石产品,铝的回收率约为89%.探讨了导向剂在合成沸石中的应用,并对4A沸石产品的物性进行了表征.     

二氧化硫对作物游离氨基酸浓度的作用

观察了四种作物接触二氧化硫后游离氨基酸,特别是十种昆虫必需氨基酸含量的变化.二氧化硫引起油菜、大豆和小麦叶片中昆虫必需氨基酸浓度明显增加,非必需氨基酸中,增加或减少趋势不一.玉米没有这种反应.二氧化硫熏气的大豆上叶螨生长繁殖快于对照.讨论了植物中氨基酸浓度的增加和大气污染诱发虫害加剧的关系.     

元谋糖厂,纸厂废水污灌后果分析

对元谋土壤理化性状，污灌作物，废水中污染物的对比分析表明，糖厂，纸厂废水用于元谋干热区污灌呵给土壤补充养份，增加稻米，但会使淀粉含量略有下降，并且废水中的Ｃｌ＾－和Ｎａ＾＋会使某蔗，红薯口感不佳，污灌基本不存在Ａｓ、Ｈｇ、酚等有害物质影响。     

塑料废弃物的回收与再生

论述了国内外塑料废弃物回收再生技术的发展现状及各种回收再生方法的原理和特点 ,并分析了回收再生技术的主要发展方向和前景。     

利用ADMS—Urban模型测算顺德区SO2环境容量

通过建立顺德区2004年的大气污染源排放清单、收集气象资料及大气自动监测站的SO2日均浓度数据，利用ADMS—Urban模型模拟了2004年1-12月期间12个大气自动监测站的SO2日均浓度，并与监测值进行了相关性分析。验证结果表明，模拟值与监测值相关性较好（相关性系数r=0．68），并通过相关性显著检验。利用修正后的ADMS—Urban模型和环境容量方程计算了顺德区SO2实际环境容量，计算值为5．1万t/a。     

镇雄、威信硫磺矿区生态破坏及其恢复工程措施

土法炼硫在镇雄、威信已有40多年历史。大量硫化物排放及矿渣污染造成严重的生态破坏。通过实施土地整治、炉渣堆场复垦、废弃地恢复、林业、水利水保等一系列工程将使矿区生态环境得到全面恢复和治理。