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The biosorption of lead(II) ions in both simulated and real wastewater by spent mushroom Tricholoma lobayense, was studied in this work. The results show a biomass with a high potential for removing lead ions from wastewater. The optimum pH for the adsorption is 4, and the adsorption process is fast. The best sorbent mass of the biomaterial is 5 g/L with an initial lead(II) concentration of 1 mmol/L. The process follows the Langmuir isotherm model, and the biosorption capacity of lead ions reaches to 210 mg/g, which is higher than many biosorbents previously studied. The mechanism of biosorption may be mainly attributed to ion exchange. The FT-IR study identifies the functional groups responsible for this process. A scanning electron microscope showed a significant change of the sorbent surface after the biosorption process. The energy dispersive elemental analysis also confirmed the adsorption of lead(II) ions. 相似文献
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Tong Chen Xiaodong Li Jianhua Yan Shengyong Lu Kefa Cen 《Atmospheric environment (Oxford, England : 1994)》2011,45(36):6567-6575
Levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were determined in fourteen ambient air samples collected in twelve cities of five provinces and one large municipality in China. The PCDD/F concentrations varied from 2.6 to 120 pg m−3 (or from 0.04 to 1.93 pg I-TEQ m−3). Generally, TCDF was the dominant homologue group and as a rule the homologue concentration of PCDF decreased with rising chlorine substitution number of PCDF. In all cases 2,3,4,7,8-PeCDF was the most important contributor to the I-TEQ value, accounting for 35–57% of the total I-TEQ value. Higher PCDD/F levels in ambient air were found during winter. The highest PCDD/F levels were found in Chengdu, Sichuan Province. In general, the PCDD/F levels in this study were in the same range as in other studies in China. 相似文献
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Haoran Jian Xiaowei Huang Songqing Li Shuping Zhou Yinghua Cen Wung-wai Tso 《Resources, Conservation and Recycling》1994,11(1-4)
A pilot plant was set up to treat dye waste water. The flow of the plant begins with a chemical pretreatment step following by an immobilized decolorizing bacteria reactor and an ordinary activated sludge reactor at the end. Results from the seven months' operation show that the decolorization effect of the immobilized cell reactor worked satisfactorily. The effluent colour always remained below 100 with the influent colour as high as 4000 or more. The COD of the effluent could also meet the discharge standard, around 60 mg L−1. The immobilized cell reactor has an ability to reduce the BOD/COD ratio of the waste, suggesting that it can degrade the recalcitrant pollutants easily. The results show that it is a high-efficiency and low-cost process suitable to be developed into full-scale application. 相似文献
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煤粉再燃对锅炉CO及N2O排放控制的试验研究 总被引:3,自引:0,他引:3
结合CO和N2O的生成及分解机理,利用2.11 WM燃煤半工业炉进行了煤粉再燃试验,研究了煤粉再燃技术对锅炉CO和N2O排放的控制效果.试验发现,随再燃比的增加和再燃区过量空气系数的减少,CO和N2O的脱除效果增强;过高或过低的一级燃烧区过量空气系数均不利于CO的脱除;N2O的脱除随一级燃烧区过量空气系数的增大而增大.煤粉炉应用煤粉再燃技术可以实现CO和N2O的同时脱除,因而可开发该技术在燃煤锅炉中的多种污染物联合控制能力。 相似文献
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推行无铅汽油对交通道路环境空气的影响分析 总被引:1,自引:0,他引:1
通过环境空气铅污染的调查对沈阳市推行无铅汽油,治理铅污染的效果进行分析评价。 相似文献
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