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101.
Recovery of heavy metals from electroplating sludge and stainless steel pickle waste liquid by ammonia leaching method 总被引:2,自引:0,他引:2
1 IntroductionElectroplatingsludge,containingCu,Ni,Zn,Cr,Fe,etc.,isharmfulwastematerialproducedbygalvanizationindustry.Thereisstillnoeffectivemethodtorecoverresourceandcontrolpollutionbothathomeandabroad.Themetalsdiscardedbygalvanizationindustryamoun… 相似文献
102.
环境监测作为环境管理的重要手段之一,在经济发展过程中,我们应了解环境监测在经济建设中的地位和作用,充分有效的利用环境监测的成果,使之为经济发展服务。 相似文献
103.
The feasibility of decomplexation removal of typical contaminants in electroplating wastewater, complexed Cu(II) with 1-hydroxyethylidene-1,1-diphosphonic acid (Cu-HEDP), was first performed by a three-dimensional electric
reactor with activated biochar as particle electrodes. For the case of 50 mg/L Cu-HEDP, Cu(II) removal (90.7%) and PO
initial pH 7, acid-treated almond shell biochar (AASB) addition 20 g/L, and reaction time 180 min, with second-order rate constants of 1.10 × 10−3 and 1.94 × 10−5 min−1respectively. The growing chelating effect between Cu(II) and HEDP and the comprehensive actions of adsorptive accumulation, direct and indirect oxidation given by particle electrodes accounted for the enhanced removal of Cu-HEDP, even though the mineralization of HEDP was mainly dependent on anode oxidation. The performance attenuation of AASB particle electrodes was ascribed to the excessive consumption of oxygen-containing functionalities during the reaction, especially acidic carboxylic groups and quinones on particle electrodes, which decreased from 446.74 to 291.48 µmol/g, and 377.55 to 247.71 µmol/g, respectively. Based on the determination of adsorption behavior and indirect electrochemical oxidation mediated by in situ electrogenerated H2O2 and reactive oxygen species (e.g., •OH), a possible removal mechanism of Cu-HEDP by three-dimensional electrolysis was further proposed. 相似文献
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107.
Numerous studies support that biodiversity predict most to ecosystem functioning, but whether other factors display a more significant direct impact on ecosystem functioning than biodiversity remains to be studied. We investigated 398 samples of the phytoplankton phosphorus resource use efficiency (RUEP = chlorophyll-a concentration/dissolved phosphate) across two seasons in nine plateau lakes in Yunnan Province, China. We identified the main contributors to phytoplankton RUEP and analyzed their potential influences on RUEP at different lake trophic states. The results showed that total nitrogen (TN) contributed the most to RUEP among the nine lakes, whereas community turnover (measured as community dissimilarity) explained the most to RUEP variation across the two seasons. Moreover, TN also influenced RUEP by affecting biodiversity. Species richness (SR), functional attribute diversity (FAD2), and dendrogram-based functional diversity (FDc) were positively correlated with RUEP in both seasons, while evenness was negatively correlated with RUEP at the end of the rainy season. We also found that the effects of biodiversity and turnover on RUEP depended on the lake trophic states. SR and FAD2 were positively correlated with RUEP in all three trophic states. Evenness showed a negative correlation with RUEP at the eutrophic and oligotrophic levels, but a positive correlation at the mesotrophic level. Turnover had a negative influence on RUEP at the eutrophic level, but a positive influence at the mesotrophic and oligotrophic levels. Overall, our results suggested that multiple factors and nutrient states need to be considered when the ecosystem functioning predictors and the biodiversity-ecosystem functioning relationships are investigated. 相似文献
108.
白洋淀的纤毛虫及与水质污染的关系 总被引:5,自引:0,他引:5
对白洋淀纤毛虫的种类组成、优势种进行了初步调查,同时对水质进行理化监测,共鉴定出纤毛虫48种。根据Marsson引出的污水生物体系法分析,白洋淀纤毛虫主要由耐有机污染的种群组成。说明白洋淀主要受有机污染。纤毛虫的种类数与水体中TN、TP、BOD5有着密切关系。 相似文献
109.
从环境水文地质学的角度出发,对济南市地下水污染的主要途径和方式,以及局部地下水重污染区进行了较为详细的分析,济南市地下水污染以浅层地下水污染为主,局部地区深层地下水也已受到污染,并有进一步加重的趋势,地下水严重超采,造成多处地表塌陷和降落漏斗,并成为济南市地下水的重污染区。 相似文献
110.
国内外环境监测分析的现状和发展 总被引:3,自引:0,他引:3
从实验室分析仪器和技术、与污染物总量控制有关的自动监测系统和技术,与应急事故监测有关的现场简易监测分析仪器和技术等方面概括介绍了环境监测分析仪器和技术的现状与发展,并概要介绍了日美及中国环境监测分析产业的现状与发展。 相似文献