汽车排气污染现状及防治对策

论述了汽车污染现状 ,污染的原因 ,提出了防治对策     

油气田水环境污染隐患及其治理对策

四川盆地的XC气田勘探开发已近30年，对周围环境的影响日异突出。对油气田环境污染隐患进行分析总结，并结合近年来油气田废水的治理实践，提出保护气田水环境的对策。     

沈阳市汽车排气检测情况及有关问题探讨

本文对沈阳市４条检车线汽车排气的检测情况做了简单介绍，并把测试数据进行了概括分析，根据实践经验提出限制汽车污染物排放的几项建议．     

单甲脒残留量的气相色谱分析

以气相色谱法分析水果和土壤中单甲脒的总残留量。单甲脒及其代谢物先水解成2.4—二甲苯胺,经石油醚萃取,酸碱液液分配净化,七氟丁酸酐衍生化后,用带有电子捕获检测器的气相色谱仪检测。柑桔和土壤中单甲脒的最低检测浓度分别为1ppb和5ppb。单甲脒的添加浓度在0.25～2.0ppm范围内,在柑桔和土壤中的平均回收率分别为82.4％±5.4％和82.8％±2.3％。     

气相色谱在我国水质监测中的应用

从系统分析,有机污染物的分析,金属类的分析,多组份污染物的分析及底质分析等几方面,概述了气相色谱在我国水质监测中的应用.     

加膜流动注射光度法测定水中微量氨

采取在流动注射体系中加气体扩散膜装置的方法，让水样中的ＮＨ４在ＮａＯＨ载液中转变成ＮＨ３后扩散透过气体分离膜，再在Ｈ２ＳＯ４吸收液中又重新转变成ＮＨ＾＋４，以此在线分离出水样中微量ＮＨ＾＋４后用靛酚蓝光度法测定。结果表明，在５～８０μｇ／ｍＬ和２００～５００μｇ／ｍＬ这２个区间内分别与吸光度呈现良好的线性，其相关系数分别为０．９９４和０．９９８。对５００μｇ／ｍＬ样品１０次测定的ＲＳＤ为１．６％，     

吹脱捕集-热解析-气相色谱法测定水中苯系物含量的探讨

建立了吹脱捕集-热解析的方法对样品进行浓缩,提高了方法的灵敏度,降低了方法的检出限。用微量的甲醇作中间溶剂,使水中苯系物这一分散体系,变为均匀稳定的单液相状态,方法的准确度和精密度较高。当进样量为3mL时,苯系物的各组分检出限在0 1～1 0 μg/L之间,浓度与峰高线性关系良好(r >0 998) ,线性范围在10 3～10 4 μg/L之间,方法的变异系数在1 0～6 5 %之间,回收率在92 7%～10 5 3%之间,该方法操作简单实用性强,能够充分满足生产要求     

二溴醛干燥窑尾气治理方法研究

二溴醛干燥窑尾气污染主要是恶臭污染，本文着重叙述了净化的方法研究，结果表明，采用二级处理方式．能有效地除去固态污染物及恶臭污染．     

Impacts of earthworms on soil nutrients and plant growth in soybean and maize agroecosystems

The objective of this experiment was to determine the effects of earthworms on soil N pools and plant growth in soybean and maize agroecosystems. The species and number of individuals in earthworm communities were manipulated in plot-scale field enclosures (2.4 m × 1.2 m) by first reducing earthworm populations within enclosures with carbaryl pesticide, and then adding earthworm treatments to the enclosures. Soybean was grown in the enclosures in the first year and stover maize in the second year.The success of earthworm manipulations in field enclosures was affected by climate conditions and available food resources. The endogeic earthworm species Aporrectodea caliginosa was dominant in all enclosures, while introduced anecic Lumbricus terrestris earthworms had poor survival. In the first season, when climate conditions were favourable for earthworm survival and growth, there was a significant (P < 0.05) linear increase in soil mineral-N and microbial biomass N concentrations in the 0–15 cm depth of enclosures with more earthworms. Similarly, soybean grain and grain-N yield was significantly (P < 0.05) greater in enclosures with the largest earthworm populations than the control which had no earthworms added. In the second season, when climate conditions were less favourable, there was no effect of earthworms on soil N pools or maize plants, probably due to poor survival of introduced earthworms.     

城市生活垃圾填埋场气体的产生、控制及利用综述

对城市生活垃圾填埋场气体的产生、控制及利用进行了较为系统的综述分析，描述了填埋场气体的组成、性质及产生过程，分析了影响填埋场气体产生的因素，概括了填埋场气体控制手段和管理利用方式。