强震前淮北台地倾斜短临异常的探讨

地倾斜观测是目前我国作为探索地震前兆的重要手段之一,实践证明地倾斜与地震存在着一定的对应关系.本文尝试利用淮北台FSQ型及JB型倾斜仪的观测结果,通过分析,获取与全球、全国强震有关的短临前兆信息以及总结其基本特征,得到了一些经验性认识.     

Influence of dissolved organic matter on methylmercury transformation during aerobic composting of municipal sewage sludge under different C/N ratios

Current knowledge about the transformation of total mercury and methylmercury (MeHg) in aerobic composting process is limited. In this study, the composition and transformation of mercury and dissovled organic matter (DOM) in aerobic composting process of municipal sewage sludge were were comprehensively characterized, and the differences among the three C/N ratio (20, 26 and 30) were investigated. The main form of mercury in C/N 20 and 26 was organo-chelated Hg (F3, 46%-60%); while the main form of mercury in C/N 30 was mercuric sulfide (F5, 64%-70%). The main component of DOM in C/N 20 and 26 were tyrosine-like substance (C1, 53%-76%) while the main fractions in C/N 30 were tyrosine-like substance (C1, 28%-37%) and fulvic-like substance (C2, 17%-39%). The mercury and DOM varied significantly during the 9 days composting process. Compared to C/N 20 and 26, C/N 30 produced the less MeHg after aerobic composting process, with values of 658% (C/N 20), 1400% (C/N 26) and 139% (C/N 30) of the initial, respectively. Meanwhile, C/N 30 produced the best compost showed greater degree of DOM molecular condensation and humification. Hg fraction had been altered by DOM, as indicated by a significant correlation between mercury species and DOM components. Notably, C/N 30 should be used as an appropriate C/N ratio to control the methylation processes of mercury and degration of DOM.     

淮北台DSQ型与SSQ-2I型倾斜仪观测资料的对比分析

对淮北台DSQ型水管和SSQ-2I型水平摆倾斜仪观测资料质量从一般指标和内精度指标进行定量判定,结果表明水管仪观测质量较高,稳定性不及水平摆倾斜仪,观测数据均受大风和降雨影响。因仪器工作原理、技术参数等因素不同,记录到同震形变波在响应延迟、最大振幅和形态特征等方面存在一定差异。     

应对数字化地形变观测干扰分析与实践

文章在讨论、分析2010年5月初密封前后主要气象因素(大风、气压、强降水)对淮北台定点地形变观测影响的基础上,认为大风主要对倾斜仪产生干扰,气压主要对伸缩仪产生干扰,且密封后主要气象因素的干扰均得到改善。     

Heavy metal(loid)s in sewage sludge in China: concentrations and spatial-temporal variations

Environmental Science and Pollution Research - Sewage sludge (SS) production in China has increased rapidly, accompanying the fast expansion of its sewage treatment capacity. Heavy metals (HMs) in...     

淮北台FSQ型与JB型倾斜仪观测资料的对比分析

本文分析了淮北台FSQ仪和JB仪的观测数据,结合降雨资料和故障率进行对比,得到前者的长期稳定性以及观测资料内在质量优于后者,频响特性有所不同,故障率高于JB仪。结果对仪器性能分析和观测数据使用具有参考意义。     

淮北台FSQ型与JB型倾斜仪观测资料的对比分析

本文分析了淮北台FSQ仪和JB仪的观测数据，结合降雨资料和故障率进行对比，得到前者的长期稳定性以及观测资料内在质量优于后者，频响特性有所不同，故障率高于JB仪。结果对仪器性能分析和观测数据使用具有参考意义。     

污染源在线监控系统的性能测试及对比试验分析与研究

近年来,为加强对污染源的执法监管,加大对污染源的监控力度,进一步促进企业达标排放和节能减排,推动环境质量的不断改善,许多城市都在企业普及安装了在线监控系统。要保证在线监控系统的运行效果,关键在于通过合理的方法,严把验收关,科学进行监控系统的性能测试以及在线监控数据与人工监测数据的对比分析和验证,以确保在线监测数据的准确性和有效性,充分发挥在线监控系统在环境管理中的作用。加强在线监控系统维护管理,定期或不定期进行性能测试和对比试验分析,能够确保在线监测数据的质量。