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In this study, the content of heavy metals was determined in berries and leaves of lingonberry (Vaccinum vitisidaea) by inductively coupled plasma mass spectrometry (ICPMS). Samples of lingonberry plant were collected from surroundings of open pit mining area of metallic sulphides bearing mineralization from Mănăila (Suceava County). On the base of legislative permissible limits, the berries and leaves...
In recent years, with the advantages of long distance and large capacity, ultrahigh voltage direct current (UHVDC) transmission projects are developing increasingly in China. Also UHVDC transmission projects share corridors with underground oil & gas pipelines has become increasingly prominent. UHVDC ground electrode influences underground oil & gas pipeline is a new problem in China with...
A single-frequency dielectric model at 1.4 GHz for frozen mineral soils was developed, with the temperature and clay content varying from −1 to −30°C and 9.1 to 41.3%, respectively. The model is based on dielectric measurements of three typical soils (sandy loam, silt loam, and silty clay) collected in the Yamal peninsular. The refractive mixing model was applied to fit the data aggregates consisting...
The potential hazard of heavy metals in reclaimed mine soil has been attracted more and more attention. Hyperspectral inversion can be applied to predict the heavy metal content of the soil effectively. Three machine learning methods, Support Vector Machine (SVM), Random Forest (RF) and Extreme Learning Machine (ELM), are introduced in this paper, and then are compared with the Partial Least Squares...
Extra-high (EHV) transmission system has the characteristics of high voltage and large capacity, and a high amplitude current will be generated through the grounding line and ground net when failure occurs. Step voltage caused by the diffusion of fault current in soil is an important parameter affecting the normal operation of the system. The calculation and analysis of the step voltage in IEEE Std...
Heavy metal pollution of soil in the mining tailings is one of the most serious environmental problems in the world nowadays. Heavy metals may pose a long-term potential threat to ecosystems and human health. Therefore, it is significant to monitor heavy metal pollutions of soil in the mining tailings, and it become an urgent task. The goal of this research was to estimate Pb concentration in mining...
Automated irrigation system needs weather information for irrigation control. Scattered automated weather stations (ASW) from government agencies or wireless sensor network (WSN) are used for weather monitoring purpose. Each has its own advantages and disadvantage in terms of cost to farmers and accuracy on monitoring parameters. This paper proposes a technique of real-time spatial interpolation using...
The lightning current might inject grounding grid through the grounding lead when the arrester suffered a lightning wave in substation. Then the ground potential difference(the difference of ground potential can/may) generated interference voltage on secondary cables due to earth potential rising. The interference voltage might lead secondary equipments misoperation and even damage. To analysis the...
To survey of heavy metals pollution in Lanping Jinding lead-zinc mine, based on pollution features of different areas, the contaminated soil area was divided into four zones which were polluted by tailings, mine drainage, settling dust in wind and spreading minerals during vehicle transportation respectively. Meanwhile, the model of soil environmental geochemical baseline was constructed by applying...
In this paper, a time domain reflectometry (TDR)-based system for the non-invasive localization of leaks in underground pipes is described and experimentally validated. The proposed system simply relies on TDR measurements performed on a two-wire cable (biwire) that is rolled out on the underground pipe at the time of installation of the pipe (but made accessible from the road surface through an inspection...
The effect of red mud, bone char and lime on the uptake and accumulation of lead (Pb), zinc (Zn) and arsenic (As) by maize planted in soil contaminated by heavy metals was studied. Five different treatments were designed: control, 5% red mud, 5% bone char, 5% lime, and 2.5% red mud + 2.5% bone char by weight. The maize was harvested 8 weeks after planting, and the concentrations of Pb, Zn, and As...
In order to reveal the transformation of heavy metals in rice-crab ecosystems and to maintain the sustainable development of crab industry, it is important for evaluating the environmental quality of rice-crab production base of the Liao River Delta. Therefore, the contents of heavy metals in water, soil and aquatic plants of the rice-crab production base in the Liao River Delta were monitored from...
A survey study on heavy metals (Pb, Zn, Cu, Ni, Cr) in soil was carried out in Huai-Lian sections of Ning-Lian Superhighway. The results showed that there was different heavy mental pollution within the 200 m wide zones along either side of the expressway. The heavy metals pollution of the soil was evaluated by using single factor pollution index, the results showed that Pb, Cu and Ni had contaminated...
In this investigation, the Zhaoyuan gold mine was selected as the target study region, and the crops samples and corresponding soil samples surrounding gold mine were gathered to detect the lead content in those samples. The lead content in the soil and crop samples was detected by atomic absorption spectrometric method The physical and chemical characteristics of soil, such as the pH value of soil...
This study deals with the soil contamination as a reason of the emissions during 50 years work of lead, zinc and sulfuric acid plants of KCM SA. Based on results from 15 monitoring points can be concluded that highest values of the main pollutants are established in the soil from the forest-shelter belt which is very close to the Pb-Zn smelter. There is a tendency for decreasing of soil contamination...
In this work, total heavy metals (Cd, Cu, Pb and Zn) concentrations and corresponding speciation extraction of the certified reference material (soil GBW07445) were analyzed by flame atomic absorption spectrometry (FAAS) with microwave-assisted digestion (MAD) and microwave-assisted extraction (MAE). The experiments were optimized to improve efficiencies with smaller amount of reagents in less time...
In order to understand the formal and informal recycling of e-waste in Asia and find the possible improvement, we surveyed the processes of dismantling and recycling of e-waste in detail by site investigations in China, Indonesia, the Philippines and Vietnam in 2009–2011 (Philippines in 2010). CRT TV/monitors recycling and precious metal recovery from printed circuit boards were mainly characterized...
In order to determine the concentration of heavy metals in the soils of Donghai Island new area, Zhanjiang, and the associated potential ecological risk, 40 soil samples in cultivated land and woodland were obtained and analyzed for Pb, Zn, Cu, Cd and Cr. Two indices-the Index of Geoaccumulation and the Potential Ecological Risk Index-were used to evaluate the degree of pollution by heavy metals....
EDTA, Dodecylbenzene sulfonate, HCl, Tartaric acid and CaCl2 were used as extractants to remove Cr and Pb from Pb, Cr-contaminated soils. Batch equilibrium experiments were performed under variation of solid:liquid ratio and washing time. The results indicated that Citric acid, EDTA and Tartaric acid were effective for extracting Cr from the soils and EDTA, HCl and Tartaric acid were effective for...
Surface soil samples from 12 sampling sites around coal gangue piles of Baodian coal mine area in Shandong Province, China were collected and analyzed. The results showed that the average concentrations of Cu, Cd, Pb and Zn in soil of Baodian coal mine area were up to 30.91, 1.97, 37.78 and 101.81 mg/kg, respectively, which are much higher than their natural background values of Shandong province...
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