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41.
Jianqiao Wang Ryoko Yamamoto Yotaro Yamamoto Toshinobu Tokumoto Jing Dong Peter Thomas Hirofumi Hirai Hirokazu Kawagishi 《Chemosphere》2013
Bisphenol A (BPA) is one of the representative compounds of the endocrine disrupting compounds group and the highest volume chemicals produced worldwide. As a result, BPA is often detected in many soil and water environments. In this study, we demonstrated the transformation of BPA from liquid cultures inoculated with hyper lignin-degrading fungus Phanerochaete sordida YK-624. Under non-ligninolytic condition, approximately 80% of BPA was eliminated after 7 d of incubation. High-resolution electrospray ionization mass spectra and nuclear magnetic resonance analyses of a metabolite isolated from the culture supernatant suggested that BPA was metabolized to hydroxy-BPA, 4-(2-(4-hydroxyphenyl)propan-2-yl)benzene-1,2-diol, which has a much lower estrogenic activity than BPA. In addition, we investigated the effect of the cytochrome P450 inhibitor piperonyl butoxide (PB) on the hydroxylation of BPA, markedly lower transformation activity of BPA was observed in cultures containing PB. These results suggest that cytochrome P450 plays an important role in the hydroxylation of BPA by P. sordida YK-624 under non-ligninolytic condition. 相似文献
42.
Hirofumi Sakanakura Masahiro Osako Akiko Kida Shin-ichi Sakai 《Journal of Material Cycles and Waste Management》2011,13(1):56-67
The objective of this study was to design a procedure for an environmental availability test under both acidic and alkaline
conditions for solid wastes and recycled materials and products. The procedure was designed on the basis of the Dutch availability
test NEN 7371. Bottom ash from a municipal solid waste incinerator and copper slag were used as test materials. The influences
of the type and intensity of liquid stirring apparatus and the open area ratio of the top of the leaching vessel were investigated
experimentally, and partial least-squares modeling was applied as multivariate data analysis for the simultaneous evaluation
of the three leaching conditions. Interlaboratory validation was then carried out with the participation of seven laboratories
in accordance with JIS Z 8402-2/ISO 5725-2. Both repeatability and reproducibility were found to be acceptable, but precise
calibration of the pH electrode is required. The proposed procedure will provide sufficient accuracy as a standard test method. 相似文献
43.
Thermodynamic and kinetic studies on the adsorption of Cs+ and Sr2+ by Na-exchanged clinoptilolite-rich zeolite rock from Akita (Northern Japan) were performed for the purpose of nuclear waste treatment. The thermodynamic parameters such as selectivity coefficient, thermodynamic equilibrium constant, and standard free energy of exchange were evaluated. These values indicated that the selectivity order was determined as Cs+ > Na+ > Sr2+. In order to discuss the adsorption mechanism of Cs+ and Sr2+ onto Na-exchanged clinoptilolite, the effective diffusion coefficients were calculated and two kinetic models, pseudo-first-order and pseudo-second-order kinetic model, were tested. For all systems studied, chemisorption seems significant in the rate-controlling step, and the pseudo-second-order kinetic model provided the best correlation of the experimental data. 相似文献
44.
Hidenao Hasegawa Hirofumi Tsukada Hitoshi Kawabata Yuki Chikuchi Yuichi Takaku Shun'ichi Hisamatsu 《Journal of environmental radioactivity》2009
Direct deposition of radioactive material onto crops is one important pathway for safety assessment of radionuclides released from nuclear facilities. Foliar uptake of Cs by radish (Raphanus sativus L. cv. Redchim) was studied by applying droplets of Cs solution (CsCl or CsNO3) on an upper leaf surface. The uptake of Cs was strongly affected by counter anions of Cs in the applied solution. Approximately 80% of Cs was absorbed for CsCl solution, while only 20% was absorbed for CsNO3. The partition of absorbed Cs between leaf and root tuber was quite similar for both Cs compounds, which indicated that behavior of the absorbed Cs in radish was the same for both. 相似文献
45.
Kato Takahiro Hatakeyama Takeshi Sugawara Katsuyasu 《Journal of Material Cycles and Waste Management》2021,23(4):1636-1645
Journal of Material Cycles and Waste Management - Biomass has been attracting attention as an environmentally friendly energy resource due to concerns about global environmental problems. Chromated... 相似文献
46.
This article proposes to analyze the quantitative effects of a gradual physical and “social” exhaustion of a landfill site on an equilibrium waste management service. A gradual social exhaustion of a landfill is defined here as an upward shift of a “subjective factor” associated with the amount of waste, based on the plausible hypothesis that an individual will not accept excessive presence of landfilled waste. Physical exhaustion occurs when the absolute capacity of a landfill site decreases. The paper shows some numerical examples using specific functions and parameters, and proposes appropriate directions for three policy objectives: to decrease the equilibrium waste disposal, to increase the economic surplus of the individual and/or the waste management firm, and to lower the equilibrium collection fee. 相似文献
47.
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49.
Hiroshi Asakura Hirofumi Sakanakura Toshihiko Matsuto 《Waste management (New York, N.Y.)》2010,30(10):1989-1996
Alkaline eluate from municipal solid waste (MSW) incineration residue deposited in landfill alkalizes waste and soil layers. From the viewpoint of accelerating stability and preventing heavy metal elution, pH of the landfill layer (waste and daily cover soil) should be controlled. On the other hand, pH of leachate from existing MSW landfill sites is usually approximately neutral. One of the reasons is that daily cover soil can neutralize alkaline solution containing Ca2+ as cation. However, in landfill layer where various types of wastes and reactions should be taken into consideration, the ability to neutralize alkaline solutions other than Ca(OH)2 by soil should be evaluated. In this study, the neutralization capacities of various types of soils were measured using Ca(OH)2 and NaOH solutions. Each soil used in this study showed approximately the same capacity to neutralize both alkaline solutions of Ca(OH)2 and NaOH. The cation exchange capacity was less than 30% of the maximum alkali neutralization capacity obtained by the titration test. The mechanism of neutralization by the pH-dependent charge can explain the same neutralization capacities of the soils. Although further investigation on the neutralization capacity of the soils for alkaline substances other than NaOH is required, daily cover soil could serve as a buffer zone for alkaline leachates containing Ca(OH)2 or other alkaline substances. 相似文献
50.
Environmentally sustainable applications of agro-based spent mushroom substrate (SMS): an overview 总被引:1,自引:0,他引:1
Fatimah Hafifah Mohd Hanafi Shahabaldin Rezania Shazwin Mat Taib Mohd Fadhil Md Din Masahito Yamauchi Mariko Sakamoto Hirofumi Hara Junboum Park Shirin Shafiei Ebrahimi 《Journal of Material Cycles and Waste Management》2018,20(3):1383-1396
Agricultural wastes such as lignocellulosic residues are renewable resources can be used for mushroom cultivation. Spent mushroom substrate (SMS) is defined as leftover of biomass generated by commercial mushroom industries after harvesting period of mushroom. Mushroom cultivation using agricultural wastes promises a good quality of SMS for producing beneficial products such as animal feeding and fertilizers. Based on the published papers, the major applications of SMS are animal feedstock, fertilizer, energy production and wastewater treatment. For instance, some species of mushroom such as Pleurotus spp. and Agaricus bisporus are suitable for applications of ruminant feedstock and fertilizers. This paper reviews the recent studies about the beneficial usage of SMS which is considered as a waste since 2013. 相似文献