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排序方式: 共有163条查询结果,搜索用时 156 毫秒
61.
Araña J Garriga I Cabo C Fernández Rodríguez C Herrera Melián JA Ortega Méndez JA Doña Rodríguez JM Pérez Peña J 《Chemosphere》2008,71(4):788-794
In the present work the photocatalytic and biological degradation of two commercial mixtures of pesticides (Folimat and Ronstar) and two fungicides (pyrimethanil and triadimenol) has been studied. The evolution of some components of these commercial products (dicofol, tetradifon and oxadiazon) and that of the two fungicides has been monitored by means of HPLC, GC-MS, TOC and toxicity (Lemna minor toxicity test) measurements. The photocatalytic method was able to degrade dicofol, tetradifon, pyrimethanil, triadimenol and the components of Ronstar with the exception of oxadiazon. In addition to this, the photocatalytic method eliminated pyrimethanil toxicity and reduced that of triadimenol by a 90%, Ronstar by a 78% and Folimat by an 87%. Nevertheless, the wetland reactors alone could reduce the toxicity of only the former. Finally, the proper dosage of the water containing the pesticides to a photocatalytic reactor followed by a wetland reactor resulted to be the most successful strategy for the detoxification of the studied compounds and their mixtures. 相似文献
62.
de Araújo Morais J Ducom G Achour F Rouez M Bayard R 《Waste management (New York, N.Y.)》2008,28(10):1791-1800
Using mechanical-biological treatment of residual municipal solid waste, it is possible to significantly lower landfill volume and gas and leachate emissions. Moreover, the landfill characteristics are improved. The performance of the Mende (France) mechanical-biological treatment plant is assessed via mass balances coupled with manual sorting according to the MODECOMtrade mark methodology and biochemical methane potential after 90 days of incubation. The site includes mechanical sorting operations, a rotary sequential bioreactor, controlled aerobic stabilisation corridors, maturation platforms, and a sanitary landfill site for waste disposal in separated cells. Results showed that several steps could be improved: after a first sieving step, about 12% of the potentially biodegradable matter is landfilled directly without any treatment; mechanical disintegration of papers and cardboards in the rotary sequential bioreactor is insufficient and leads to a high proportion of papers and cardboards being landfilled without further treatment. Two fine fractions go through stabilisation and maturation steps. At the end of the maturation step, about 54% of the potentially biodegradable matter is degraded. The biochemical methane potential after 90 days of incubation is reduced by 81% for one of the two fine fractions and reduced by 88% for the other one. Considering the whole plant, there is a reduction of nearly 20% DM of the entering residual municipal solid waste. 相似文献
63.
Malaysia is facing an increase in the generation of waste and of accompanying problems with the disposal of this waste. In the last two decades, extensive building and infrastructure development projects have led to an increase in the generation of construction waste material. The construction industry has a substantial impact on the environment, and its environmental effects are in direct relation to the quality and quantity of the waste it generates. This paper discusses general characteristics of the construction contractors, the contractors' willingness to pay (WTP) for improved construction waste management, determining factors which affect the amount of their willingness to pay, and suggestions and policy implications in the perspective of construction waste management in Malaysia. The data in this study is based on contractors registered with the construction industry development board (CIDB) of Malaysia. Employing the open ended contingent valuation method, the study assessed the contractors' average maximum WTP for improved construction waste management to be RM69.88 (1US$=3.6 RM) per tonne of waste. The result shows that the average maximum WTP is higher for large contractors than for medium and small contractors. The highest average maximum WTP value is RM88.00 for Group A (large contractors) RM78.25 for Group B (medium-size contractors) and RM55.80 for Group C (small contractors). One of the contributions of this study is to highlight the difference of CIDB registration grade in the WTP for improved construction waste management. It is found that contractors' WTP for improved waste collection and disposal services increases with the increase in contractors' current paid up capital. The identified factors and determinants of the WTP will assist the formulation of appropriate policies in addressing the construction waste problem in Malaysia and indirectly improve the quality of construction in the country. 相似文献
64.
65.
Effect of glyphosate on the microbial activity of two Brazilian soils 总被引:15,自引:0,他引:15
Glyphosate [N-(phosphonomethyl)-glycine] is a broad-spectrum, non-selective, post-emergence herbicide that is widely used in agricultural. We studied, in vitro, changes in the microbial activity of typical Hapludult and Hapludox Brazilian soils, with and without applied glyphosate. Glyphosate was applied at a rate of 2.16 mg glyphosate kg(-1) of soil and microbial activity was measured by soil respiration (evolution of CO(2)) and fluorescein diacetate (FDA) hydrolysis over a period of 32 days. We found an increase of 10-15% in the CO(2) evolved and a 9-19% increase in FDA hydrolyses in the presence of glyphosate compared with the same type of soil which had never received glyphosate. Soil which had been exposed to glyphosate for several years had the strongest response in microbial activity. Most probable number (MPN) counts showed that after 32 days incubation the number of actinomycetes and fungi had increased while the number of bacteria showed a slight reduction. After the incubation period, high pressure liquid chromatography (HPLC) detected the glyphosate metabolite aminomethyl phosphonic acid (AMPA), indicating glyphosate degradation by soil microorganisms. 相似文献
66.
Agrawal Pankaj Araújo Aylanna P. M. Brito Gustavo F. Cavalcanti Shirley N. Alves Amanda M. Freitas Daniel M. G. Mélo Tomás J. A. 《Journal of Polymers and the Environment》2021,29(6):1777-1788
Journal of Polymers and the Environment - This work aims to investigate the effect of organically modified montmorillonite (OMMT) and vermiculite (OVT) clays on the properties of poly(lactic acid)... 相似文献
67.
dos Santos Filho Edson Antônio Siqueira Danilo Diniz Araújo Edcleide Maria Luna Carlos Bruno Barreto de Medeiros Everaldo Paulo 《Journal of Polymers and the Environment》2022,30(2):443-460
Journal of Polymers and the Environment - Nowadays, there is a need to obtain eco-friendly materials, especially plastics that are responsible for most of the environmental pollution. In this... 相似文献
68.
Nolasco Maria E. Lemos Viviane A. S. López Gina Soares Sandra A. Feitosa Johnny P. M. Araújo Bruno S. Ayala Alejandro P. de Azevedo Marleane M. F. Santos Francisco E. P. Cavalcante Rivelino M. 《Journal of Polymers and the Environment》2022,30(7):2862-2874
Journal of Polymers and the Environment - The aim of the present study was to perform morphological and chemical characterizations of microplastics (MPs) found in seawater samples from the coast of... 相似文献
69.
Dias Marcela França Leroy-Freitas Deborah Machado Elayne Cristina da Silva Santos Leticia Leal Cintia Dutra da Rocha Fernandes Gabriel de Araújo Juliana Calábria 《Environmental science and pollution research international》2022,29(24):36088-36099
Environmental Science and Pollution Research - Wastewater tertiary treatment has been pointed out as an effective alternative for reducing the concentration of antibiotic resistant bacteria and... 相似文献
70.
Silveira Elaine Divina Rodrigues Benvindo-Souza Marcelino Assis Rhayane Alves dos Santos Cirley Gomes Araújo de Lima Amorim Nathan Pereira Borges Rinneu Elias de Melo Celine de Souza Santos Lia Raquel 《Environmental science and pollution research international》2022,29(10):14279-14287
Environmental Science and Pollution Research - Free-living birds play an important role as bioindicators in natural environments. In this study, we used the micronucleus test and nuclear... 相似文献