我国环境监测市场化面临的困境及对策探讨

我国一直以来环境监测活动主要都是由政府相关部门主导,管理体制较为单一。随着环境管理要求的持续提高、环境保护范围的不断增大以及环境监测任务的日益繁重,政府主导的环境监测活动开始暴露出诸多问题,已经成为制约我国环境监测发展的重要因素,全面推进环境监测市场化迫在眉睫。鉴于此,本研究主要针对环境监测市场化进行了全面的概述,同时针对我国环境监测市场化面临的困境进行了详尽的阐述,并基于上述内容提出几点推进环境监测市场化的措施与建议,仅供决策参考与借鉴。     

环境监测市场化趋势分析

在全球环境问题日益突出的形势下,环境保护工作也愈来愈受到重视。在环保工作实际开展过程中,环境监测是重要环节之一。通过有效的环境监测可以保证环保工作的质量,从而让环保工作取得成效。从当前趋势来看,环境监测市场化将是未来环境监测发展的重要方向之一,而市场化运作将促使环境监测体系更加完善化。鉴于此,本文对环境监测市场化趋势进行了综合性分析,提出了相关观点,以供参考。     

阿克苏地区服务性环境监测业务市场化探析

本文分析阿克苏地区环境监测管理体制、管理手段、管理目标、管理职能等存在的不足方面,论述了服务性环境监测工作内容和性质,并对环境监测市场化过程中存在的问题进行分析与研究,提出了在本地环境保护领域日益扩大、环境监测任务快速增加和环境管理要求不断提高的情况下,推进环境监测服务主体多元化、服务方式多样化和社会化,放开服务性环境监测市场,完善环境监测市场化运营机制的管理思路。     

新形势下的环境监测管理与分包业务研究

以常州市环境监测中心为例,介绍了环境监测业务来源与类别,从环境监测收费管理、报告与项目管理、窗口服务、监测任务外包等方面,探讨新形势下,环境监测业务的规范化管理,以及环境监测业务外包的可行性,介绍了环境监测业务管理的一些创新思路,提出分包业务目前存在的问题与不足,提出今后加强对分包方的选择、评定和考核的思路和建议.提升环境监测服务效能的同时,为环境监测业务的发展方向提供参考.     

环境监测市场化的几点思考

随着国内社会环境的发展,人们对环境保护的意识逐渐深化,在国内市场经济的推动下,发展环境监测市场化,已经成为转变以往环境监测制度弊端的重要策略,只有引进市场机制,才能更好地推进我国环境监测的发展,并在市场竞争的共同作用下,进一步促进国内环境监测市场化。     

环境监测市场化实践初探——以浙江省D市为例

环境监测市场化在我国尚处于起步阶段,在探索实践中会出现各种层出不穷的新问题.本文以浙江省D市第三方检测机构管理实践为例,阐述D市环境监测市场化发展概况、存在问题,并对环境监测市场化实践经验进行总结,旨在为各地环境监测市场化工作提供参考.     

正确认识可持续发展中的环境监测和环境管理的关系

摘要：本文重．董介绍了可持续发展过程中的环境监测和环境管理两项工作内容。本文通过介绍环境监测和环境管理各自的内涵及任务,对监测和管理有了进一步的认识和理解。同时,阐述了环境监测和管理的内在关系,强调了监测和管理相辅相成、密切联系。针对这种关系,提出了对待环境监测和管理的态度,也为未来工作的发展提出了进一步的建议和措施。     

环境监测市场化的相关问题思考

随着社会经济的发展人们对生活环境的要求越来越高,环境问题对人们的生活有着重大的影响,因此成了人们日益关注的焦点和热点问题。环境监测是衡量环境管理水平高低的重要依据,也是环境保护的重要手段。本文通过对环境监测市场化过程中存在的问题进行分析探讨,提出了进一步规范环境监测市场化行为规范的措施,希望能够提高环境监测的水平,加强对环境的保护。     

环境监测市场化若干问题研究

随着社会的发展,我国的环境监测开始走向市场化。以往的环境监测都是由政府完成的,在监测的过程中可能会出现监测力度不足的情况。市场化的环境监测可以有效的弥补这个现象的发生。本文解释了环境监测市场化的内涵,提出了环境监测市场化面临的问题,分析了环境监测市场化带来的不利影响。希望能够帮助我国建立合适的环境监测机制。     

论环境监测对于环境质量评价的重要意义

近年来,环境问题已经成为了全球经济发展 所面临的一个巨大挑战,对我国环境监测工作也提出了新的要求.环境监测贯穿于整个环境影响评价体系中,环境影响评价又必须由环境监测数据来支撑.在整个环境质量评价体系中,环境监测是主要的来源和依据,因此加强对环境检测质量的管理有着重要的意义.本文主要介绍了目前我国生态监测的现状和存在的问题,指出了生态监测是一项复杂的系统工程,环境监测的最终结果是对环境质量进行评价,提出了污染治理方案、生态环境规划及生态设计方案.     

Toxic effects of acetochlor, methamidophos and their combination on nifH gene in soil

Toxic effects of two agrochemicals on nifH gene in agricultural black soil were investigated using denaturing gradient gel electrophoresis （DGGE） and sequencing approaches in a microcosm experiment. Changes of soil nifH gene diversity and composition were examined following the application of acetochlor, methamidophos and their combination. Acetochlor reduced the nifH gene diversity （both in gene richness and diversity index values） and caused changes in the nifH gene composition. The effects of acetochlor on nifH gene were strengthened as the concentration of acetochlor increased. Cluster analysis of DGGE banding patterns showed that nifH gene composition which had been affected by low concentration of acetochlor （50 mg/kg） recovered firstly. Methamidophos reduced nifH gene richness that except at 4 weeks. The medium concentration of methamidophos （150 mg/kg） caused the most apparent changes in nifH gene diversity at the first week while the high concentration of methamidophos （250 mg/kg） produced prominent effects on nifH gene diversity in the following weeks. Cluster analysis showed that minimal changes of nifH gene composition were found at 1 week and maximal changes at 4 weeks. Toxic effects of acetochlor and methamidophos combination on nifH gene were also apparent. Different nifH genes （bands） responded differently to the impact of agrochemicals： four individual bands were eliminated by the application of the agrochemicals, five bands became predominant by the stimulation of the agrochemicals, and four bands showed strong resistance to the influence of the agrochemicals. Fifteen prominent bands were partially sequenced, yielding 15 different nifH sequences, which were used for phylogenetic reconstructions. All sequences were affiliated with the alpha- and beta-proteobacteria, showing higher similarity to eight different diazotrophic genera.     

Arsenic uptake by arbuscular mycorrhizal maize （Zea mays L.） grown in an arsenic-contaminated soil with added phosphorus

The effects of arbuscular mycorrhizal (AM) fungus (Glomus mosseae) and phosphorus (P) addition (100 mg/kg soil) on arsenic (As) uptake by maize plants (Zea mays L.) from an As-contaminated soil were examined in a glasshouse experiment.Non-mycorrhizal and zero-P addition controls were included.Plant biomass and concentrations and uptake of As,P,and other nutrients,AM colonization,root lengths,and hyphal length densities were determined.The results indicated that addition of P significantly inhibited root colonization and development of extraradical mycelium.Root length and dry weight both increased markedly with mycorrhizal colonization under the zero-P treatments,but shoot and root biomass of AM plants was depressed by P application.AM fungal inoculation decreased shoot As concentrations when no P was added,and shoot and root As concentrations of AM plants increased 2.6 and 1.4 times with P addition,respectively.Shoot and root uptake of P,Mn,Cu,and Zn increased,but shoot Fe uptake decreased by 44.6%,with inoculation, when P was added.P addition reduced shoot P,Fe,Mn,Cu,and Zn uptake of AM plants,but increased root Fe and Mn uptake of the nonmycorrhizal ones.AM colonization therefore appeared to enhance plant tolerance to As in low P soil,and have some potential for the phytostabilization of As-contaminated soil,however,P application may introduce additional environmental risk by increasing soil As mobility.     

Degradation of metabolites accumulated of benzo[a]pyrene by coupling Penicillium Chrysogenum with KMnO4

Several main metabolites of benzo[a]pyrene （BaP） formed by Penicillium chrysogenum, Benzo[a]pyrene-1,6-quinone （BP 1,6- quinone）, trans-7,8-dihydroxy-7,8-dihydrobenzo[a]pyrene （BP 7,8-diol）, 3-hydroxybenzo[a]pyrene （3-OHBP）, were identified by high-performance liquid chromatography （HPLC）. The three metabolites were liable to be accumulated and were hardly further metabolized because of their toxicity to microorganisms. However, their further degradation was essential for the complete degradation of BaP. To enhance their degradation, two methods, degradation by coupling Penicillium chrysogenum with KMnO4 and degradation only by Penicillium chrysogenum, were compared; Meanwhile, the parameters of degradation in the superior method were optimized. The results showed that （1） the method of coupling Penicillium chrysogenum with KMnO4 was better and was the first method to be used in the degradation of BaP and its metabolites; （2） the metabolite, BP 1,6-quinone was the most liable to be accumulated in pure cultures; （3） the effect of degradation was the best when the concentration of KMnO4 in the cultures was 0.01% （w/v）, concentration of the three compounds was 5 mg/L and pH was 6.2. Based on the experimental results, a novel concept with regard to the bioremediation of BaP-contaminated environment was discussed, considering the influence on environmental toxicity of the accumulated metabolites.     

Impact of atrazine and nitrogen fertilizers on the sorption of chlorotoluron in soil and model sorbents

Sorption of chlorotoluron in ammonium sulfate, urea and atrazine multi-solutes system was investigated by batch experiments. The results showed application of nitrogen fertilizers to the soil could affect the behavior of chlorotoluron. At the same concentration of N, sorption of chlorotoluron decreased as the concentration of atrazine increased on the day 0 and 6 in soil, respectively. The sorption of chlorotoluron increased from 0 to 6 d when soils were preincubated with deionized water, ammonium sulfate and urea solution for 6 d. That indicated incubation time was one of the most important factors for the sorption of chlorotoluron in nitrogen fertilizers treatments. The individual sorption isotherms of chlorotoluron in rubbery polymer and silica were strictly linear in single solute system, but there were competition sorption between pesticides or between pesticides and nitrogen fertilizers. That indicated the sorption taken place by concurrent solid-phase dissolution mechanism and sorption on the interface of water-organic matter or water-mineral matter.     

Distribution and ecological effect of mercury in Laogang landfill, Shanghai, China

Laogang landfill near Shanghai is the largest landfill in China, and receives about 10000 t of daily garbage per day, Samples of topsoil and plants were analyzed to evaluate mercury pollution from the landfill. For topsoil samples, there were significant correlations among total mercury （HgT）, combinative mercury （Hgc） and gaseous mercury （HgG）, and content of total organic carbon （TOC）, but, no significantly relationship was found between Hg content and filling time. Hg content changes in vertical profiles with time showed that the average Hgv of profiles 1992, 1996, and 2000 was similar, but their average HgG was quite different. HgT was significantly correlated with Hgc in profile 1992 and 2000, and Hgv was significantly correlated with Hg6 in profile 1996. HgG/Hgv ratio in profile samples decreased in the order of （HgG,/HgT）1992〉（HgG/HgT）1996〉〉（HgG/HgT）2000. A simple outline of Hg release in landfill could be drawn： with increasing of filling time, degradation undergoes different biodegradation, accordingly, gaseous mercury goes through small, more, and small proportion to total mercury. Distribution of Hg in plants was inhomogeneous, following the order of leaf〉root〉stem. The highest value of leaf may be associated with higher atmospheric Hg from landfill. Ligneous plants （e.g. Phyllostachys glanca, Prunus salicina and Ligustrum lucidum） are capable of enriching more Hg than herbaceous plants.     

EDTA-enhanced phytoremediation of lead contaminated soil by Bidens maximowicziana

Phytoremediation is a potential cleanup technology for the removal of heavy metals from contaminated soils.Bidens maximowicziana is a new Pb hyperaccumulator,which not only has remarkable tolerance to Pb but also extraordinary accumulation capacity for Pb.The maximum Pb concentration was 1509.3 mg/kg in roots and 2164.7 mg/kg in overground tissues.The Pb distribution order in the B. maximowicziana was:leaf>stem>root.The effect of amendments on phytoremediation was also studied.The mobility of soil Pb and the Pb concentrations in plants were both increased by EDTA application.Compared with CK(control check),EDTA application promoted translocation of Pb to overground parts of the plant.The Pb concentrations in overground parts of plants was increased from 24.23-680.56 mg/kg to 29.07-1905.57 mg/kg.This research demonstrated that B.maximowicziana appeared to be suitable for phytoremediation of Pb contaminated soil,especially,combination with EDTA.     

Potential of plant polyphenol oxidases in the decolorization and removal of textile and non-textile dyes

In this study an effort has been made to use plant polyphenol oxidases; potato （Solanum tuberosum） and brinjal （Solanum melongena）, for the treatment of various important dyes used in textile and other industries. The ammonium sulphate fractionated enzyme preparations were used to treat a number of dyes under various experimental conditions. Majority of the treated dyes were maximally decolorized at pH 3.0. Some of the dyes were quickly decolorized whereas others were marginally decolorized. The initial first hour was sufficient for the maximum decolorization of dyes. The rate of decolorization was quite slow on long treatment of dyes. Enhancement in the dye decolorization was noticed on increasing the concentration of enzymes. The complex mixtures of dyes were treated with both preparations of polyphenol oxidases in the buffers of varying pH values. Potato polyphenol oxidase was significantly more effective in decolorizing the dyes to higher extent as compared to the enzyme obtained from brinjal polyphenol oxidase. Decolorization of dyes and their mixtures, followed by the formation of an insoluble precipitate, which could be easily removed simply by centrifugation.     

Decomposition of alachlor by ozonation and its mechanism

Decomposition and corresponding mechanism of alachlor, an endocrine disruptor in water by ozonation were investigated. Results showed that alachlor could not be completely mineralized by ozone alone. Many intermediates and final products were formed during the process, including aromatic compounds, aliphatic carboxylic acids, and inorganic ions. In evoluting these products, some of them with weak polarity were qualitatively identified by GC-MS. The information of inorganic ions suggested that the dechlorination was the first and the fastest step in the ozonation of alachlor.     

Enzymatic oxidation of aqueous pentachlorophenol

The influence of the nonionic surfactant Tween 80 on pentachlorophenol （PCP） oxidation catalyzed by horseradish peroxidase was studied. The surfactant was tested at concentrations below and above its critical micelle concentration （CMC）. Enhancement of PCP removal was observed at sub-CMCs. The presence of Tween 80 in the reaction mixture reduced enzyme inactivation which occurred through a combination of free radical attack and sorption by precipitated products. A simple first-order model was able to simulate time profiles for enzyme inactivation in the presence or absence of Tween 80. At supra-CMCs, the surfactant caused noticeable reductions in PCP removal, presumably through micelle partitioning of PCP which precluded the hydrophobic PCP molecule from interacting with the enzyme.     

Removal of heavy metals from sewage sludge by low costing chemical method and recycling in agriculture

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