Degradation of benzo[a]pyrene in soil with arbuscular mycorrhizal alfalfa

Mycorrhizal and non-mycorrhizal alfalfa (Medicago sativa) was grown in pots containing soil artificially contaminated with various levels of benzo[a]pyrene (B[a]P) (0, 1, 10 and 100 mg kg(-1)). Soil and plants were sampled after 30, 40, 50, 60 and 90 days and compared with unlanted pots. The percentage of mycorrhizal root length colonized by Glomus caledoniun was not significantly affected by the addition of B[a]P up to 10 mg kg(-1) but was significantly lower at 100 mg kg(-1)B[a]P compared with low concentrations (p < 0.05). There was no difference in soil polyphenol oxidase and dehydrogenase activity among the controls and applications of 1 and 10 mg kg(-1) of B[a]P. However, enzyme activities were significantly higher at 100 mg kg(-1) B[a]P compared with the other three treatments, and there was no mycorrhizal effect. Over a period of 90 days the concentration of B[a]P in soil in which alfalfa was grown was significantly lower than in unplanted soil (p < 0.05). Degradation rates of B[a]P added at 1, 10 and 100 mg kg(-1) without G. caledonium were 76, 78 and 53%, and with mycorrhizal inoculation were 86, 87 and 57%. The degradation rate in unplanted soil was significantly lower than in planted soil, and was significantly higher in medium- and low-B[a]P treatments than in the high B[a]P concentration tested. There is a possibility of enhancement phytoremediation of PAHs in rhizosphere soil with arbuscular mycorrhizal fungi.     

Degradation of Benzo[a]Pyrene in Soil with Arbuscular Mycorrhizal Alfalfa

Mycorrhizal and non-mycorrhizal alfalfa (Medicago sativa) was grown in pots containing soil artificially contaminated with various levels of benzo[a]pyrene (B[a]P)(0, 1, 10 and 100 mg kg^–1). Soil and plants were sampled after 30, 40, 50, 60 and 90 days and compared with unlanted pots. The percentage of mycorrhizal root length colonized by Glomus caledoniun was not significantly affected by the addition of B[a]P up to 10 mg kg^–1 but was significantly lower at 100 mg kg^–1B[a]P compared with low concentrations (p < 0.05). There was no difference in soil polyphenol oxidase and dehydrogenase activity among the controls and applications of 1 and 10 mg kg^–1 of B[a]P. However, enzyme activities were significantly higher at 100 mg kg^–1B[a]P compared with the other three treatments, and there was no mycorrhizal effect. Over a period of 90 days the concentration of B[a]P in soil in which alfalfa was grown was significantly lower than in unplanted soil (p < 0.05). Degradation rates of B[a]P added at 1, 10 and 100 mg kg^–1 without G. caledonium were 76, 78 and 53%, and with mycorrhizal inoculation were 86, 87 and 57%. The degradation rate in unplanted soil was significantly lower than in planted soil, and was significantly higher in medium- and low-B[a]P treatments than in the high B[a]P concentration tested. There is a possibility of enhancement phytoremediation of PAHs in rhizosphere soil with arbuscular mycorrhizal fungi.     

固态合成粉煤灰类脱硫吸附剂的脱硫活性测试

固态合成的粉煤灰吸附剂的脱硫活性测试结果表明 ,30 0℃得到的无定形硅铝钠高效脱硫剂 (FA NSA)在 5 0 0℃的脱硫温度下 ,穿透和饱和硫容分别为 64 6mg·g- 1 和 1 34 0mg·g- 1 ;穿透和饱和效率分别为 46 3%和 96 2 % .     

取代芳烃在共溶剂体系中溶解规律的研究

本文利用紫外分光光度法测定了多种取代芳烃在有机溶剂与水组成的共溶剂体系中的溶解度。实验结果表明：溶质溶解度的对数与有机溶剂的体积分数呈良好的线性关系；利用对数线性模型，以及ＵＮＩＦＡＣ基团贡献法对溶质的溶解度进行了估算，发现估算值与测定值吻合得较好。     

金矿床中毒砂的标型特征和地球化学行为探讨

本文总结了金矿床中毒砂的基本标型特征,并从地球化学角度阐述了金在毒砂中富集的机理,解释了同一金矿床中毒砂含金量比黄铁矿高,以及毒砂中常常出现晶格金的原因.     

扬中市地表水的致突变性研究

本研究诮蚕豆根尖微枋试验对扬中市不同水体的遗传毒物污染状况进行了初步调查。结果表明，扬中市水体的遗传毒物污染集中在汇集了乡镇工业废水和生活污水的排污河道和死水沟塘。各主要河道及通江闸口基本没有污染。除新坝大桥处，各样点底泥浸担液的微枋率均高于相应原水样微核率。     

Detennination of trace uranium in environment by laser induced fluorescence method

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"三同时"验收监测的数据统计处理

1 引言 “三同时”验收监测的过程中,比较受重视的是监测方案的提交和采样过程的质量控制,而验收报告也仅仅局限于强调监测数据的个体属性。但“三同时”验收监测项目多、频次高、时间长的特点却没有得到充分体现,大量数据背后隐藏的宝贵信息没有得到充分利用。 应用数理统计方法,分析“三同时”验收监测数据,揭示其数据分布规律,科学判断达标可信度及评价监测过程的质量控制,应成为验收监测报告的重要组成部分。下面,以数理统计方法,分析某污染治理设施竣工验收的监测数据为例加以说明。     

辽河流域地下水超采的生态环境效应及治理对策研究

20世纪70年代以来，辽河流域地下水资源开采量逐渐增加，局部地区地下水严重超采，地下水位下降、地下漏斗、地下水水质超标的情况日益严重，引发了天然植被退化、海水入侵等生态问题，进一步加剧了水资源短缺，严重威胁着流域水资源的可持续利用和社会经济的可持续发展。分析辽河流域地下水超采对地下水位、水质的影响及其相关的生态问题。并提出节约用水、加强地下水和地表水资源的统一规划和统一调度、建立健全地下水动态监测系统、沿海地区充分开采利用海水、已形成严重漏斗区建设利用地下水库等相应的对策与建议。