单液滴微萃取-气相色谱/质谱法检测水中多环芳烃

采用单液滴微萃取-气相色谱/质谱(GC/MS)法建立了检测水中多环芳烃(PAHs)的方法,研究了萃取溶剂种类、萃取时间、搅拌速度对萃取效率的影响,确定了最佳单液滴微萃取条件,该法用于水中PAHs的检测,16种PAHs的线性范围为0.2～7.0μg/mL,相关系数≥0.9784,检出限为0.002～0.190μg/mL,相对标准偏差为7.1%～15.1%,加标回收率在81%～122%.     

环境会计在煤炭企业中的应用研究

文章就四川西南部巢煤矿企业进行实地调查走访的基础上,对中国煤炭行业中普遍存在的一些环境问题及环境会计的现状进行分析,从资产负债表、损益表、现金流量表等方面入手,在各个表中增加能够反映出环境方面资产、负债、损益的一些科目,对科目设置进行调整,就具体的报表编制,财务处理等方面的问题用实例进行了分析和说明,其目的就是将环境要素尽量考虑到成本核算体系中去。有利于资源和环境的保护与合理利用,以期能为煤炭企业实施可持续发展战略提供参考。     

Removal of N,N-dimethylformamide by dielectric barrier discharge plasma combine with manganese activated carbon

Environmental Science and Pollution Research - Manganese activated carbon (Mn-AC) was successfully prepared by the incipient wetness method and characterized by SEM, XRD, and FTIR. This study chose...     

污泥回流对流化床生物膜—A/O活性污泥耦合工艺的影响研究

设计一套流化床生物膜(MBBR)—A/O活性污泥耦合装置处理城镇污水,考察了污泥回流对耦合工艺处理效率的影响,研究了系统中生物膜相和悬浮相微生物在有机物降解和脱氮反应中的活性差异。实验结果表明,当系统进水COD在200~400mg/L,进水氨氮在8.0~32.0mg/L,污泥回流比为1/8时,水力停留时间为12.4h,系统COD去除率平均值达81.4%,TN去除率平均值达70.6%,系统对较难降解城镇污水的处理具有明显的技术优势。污泥回流降低了生物膜相微生物的活性,而提高了悬浮相微生物活性,但生物膜相微生物活性速率仍高于悬浮相微生物活性。与传统活性污泥工艺相比,MBBR—A/O活性污泥耦合工艺将高活性生物膜引入,使悬浮污泥浓度极大降低,有助于减少污泥回流能耗与处理成本,具有明显应用价值。     

Soil calcium significantly promotes uptake of inorganic arsenic by garland chrysanthemum (ChrysanthemumL coronarium) fertilized with chicken manure bearing roxarsone and its metabolites

Roxarsone (ROX), a widely used feed organoarsenic additive, occurs as itself and its metabolites in animal manure that is commonly land used as fertilizer. Soil property impacts arsenic (As) speciation and bioavailability. Fourteen soils across China were used to conduct culture experiments to investigate As uptake by garland chrysanthemum (ChrysanthemumL coronarium), with the soils fertilized with chicken manure bearing ROX and its metabolites. The results show As(III) was the sole As form in garland chrysanthemum shoots, and As(III) and As(V) occurred in roots. Only inorganic As was detected in all soils when the plants were harvested. Stepwise regression analysis shows soil-exchangeable Ca predominated shoot As(III) concentration (shoot As(III) = 1.60030 soil Ca, R ² = 0.8832***). Therefore, ROX is transferred into the human food chain finally as inorganic As in plants. Application of animal manure bearing ROX and its metabolites is not recommended in Ca-rich soils to avoid excess inorganic As dietary exposure.

     

上海市水体中人工放射性水平调查及评价

调查了１９８９－１９９１年不海市各类水体中人工放射性核素的水平。调查共设点１５个，采集枯、丰水期水样４５个，结果表明，上海市各类水体中＾９０Ｓｒ、＾１３７Ｃｓ和总β放射性浓度均低于国家生活饮用水卫生限制标准，属正常本底水平。按调查结果估算的上海市居民从饮水中摄入的人工放射性核素＾９０Ｓｒ、＾１３７Ｃｓ、＾３Ｈ，所致人均年有效剂量为３．８×１０＾－７ＳＶ，与全国均值相吻合。     

试论宗教禁忌与海外石油石化项目HSSE管理

分析了中国石油石化海外项目所在地区宗教禁忌,总结海外项目HSSE管理的经验,对可能遇到的宗教禁忌冲突提出对策。     

改性锰砂滤料处理高铁锰煤矿矿井水

采用KMnO4溶液浸渍法制备了新型改性锰砂滤料,研究了滤料表面性能和过滤处理高铁锰矿井水的效果。结果表明,锰砂滤料除铁锰性能优于石英砂、陶粒以及瓷砂,采用KMnO4溶液浸渍能够提高锰砂滤料的过滤性能,最优的浸渍浓度为5%。5%KMnO4改性锰砂滤料过滤处理高铁锰矿井水的最佳工艺参数为:过滤周期24 h,反冲洗强度3.2 L/(s·m2),反冲洗时间5 min;通过比表面积测试分析和SEM表征分析发现,KMnO4溶液浸渍能够提高锰砂滤料比表面积,并在锰砂滤料表面形成了氧化膜,从而提高除铁除锰效果,而且浸渍液浓度越高,这种作用越明显。