Use of steel slag to neutralize acid mine drainage (AMD) in sulfidic material from a uranium mine

Acid Mine Drainage (AMD) is one of the main environmental impacts caused by mining. Thus, innovative mitigation strategies should be exploited, to neutralize acidity and prevent mobilization of trace elements in AMD. The use of industrial byproducts has been considered an economically and environmentally effective alternative to remediate acid mine drainage. Therefore, the objective of this study was to evaluate the use of steel slag to mitigate acid mine drainage in a sulfidic material from a uranium mine, as an alternative to the use of limestone. Thus, increasing doses of two neutralizing agents were applied to a sulfidic material from the uranium mine Osamu Utsumi in Caldas, Minas Gerais State. A steel slag from the company ArcelorMittal Tubarão and a commercial limestone were used as neutralizing agents. The experiment was conducted in leaching columns, arranged in a completely randomized, [(2 x 3) + 1] factorial design, consisting of two neutralizing agents, three doses and one control, in three replications, totaling 21 experimental units. Electrical conductivity (EC), pH and the concentrations of Al, As, Ca, Cd, Cu, Fe, Mn, Ni, S, Se, and Zn were evaluated in the leached solutions. The trace element concentration was evaluated by ICP-OES. Furthermore, the CO2 emission was measured at the top of the leaching columns by capturing in NaOH solution and titration with HCl, in the presence of BaCl2. An increase in the pH of the leachate was observed for both neutralizing agents, with slightly higher values for steel slag. The EC was lower at the higher lime dose at an early stage of the experiment, and CO2 emission was greater with the use of limestone compared to steel slag. A decrease in trace element mobilization in the presence of both neutralizing agents was also observed. Therefore, the results showed that the use of steel slag is a suitable alternative to mitigate AMD, with the advantage of reducing CO2 emissions to the atmosphere compared to limestone.

Spatial planning to the test of property rights in Switzerland : an innovative land management approach to coordinate spatial planning goals with property rights interests

In Switzerland, the land management regime is characterized by a liberal attitude towards the institution of property rights, which is guaranteed by the Constitution. Under the present Swiss constitutional arrangement, authorities (municipalities) are required to take into account landowners' interests when implementing their spatial planning policy. In other words, the institution of property rights cannot be restricted easily in order to implement zoning plans and planning projects. This situation causes many problems. One of them is the gap between the way land is really used by the landowners and the way land should be used based on zoning plans. In fact, zoning plans only describe how landowners should use their property. There is no sufficient provision for handling cases where the use is not in accordance with zoning plans. In particular, landowners may not be expropriated for a non-conforming use of the land. This situation often leads to the opening of new building areas in greenfields and urban sprawl, which is in contradiction with the goals set into the Federal Law on Spatial Planning. In order to identify legal strategies of intervention to solve the problem, our paper is structured into three main parts. Firstly, we make a short description of the Swiss land management regime. Then, we focus on an innovative land management approach designed to implement zoning plans in accordance with property rights. Finally, we present a case study that shows the usefulness of the presented land management approach in practice. We develop three main results. Firstly, the land management approach brings a mechanism to involve landowners in planning projects. Coordination principle between spatial planning goals and landowners' interests is the cornerstone of all the process. Secondly, the land use is improved both in terms of space and time. Finally, the institution of property rights is not challenged, since there is no expropriation and the market stays free.

A Local DLP-GIS-LP system for geographically decentralized wood procurement planning and decision making

Summary

Final planning report for City of Urbandale, Iowa,1962.

This is a three volume set of the final report on the comprehensive plan of the Urban Planning Grant for the City of Urbandale. The report also includes important maps and charts.

2005 Annual Report Capitol Planning Commission, January 2005

The Capitol Planning Commission is authorized under Chapter 8A.371—378 of the Code of Iowa. “It shall be the duty of the commission to advise upon the location of statues, fountains and monuments and the placing of any additional buildings on the capitol grounds, the type of architecture and the type of construction of any new buildings to be erected on the state capitol grounds as now encompassed or as subsequently enlarged, and repairs and restoration thereof, and it shall be the duty of the officers, commissions, and councils charged by law with the duty of determining such questions to call upon the commission for such advice. “The commission shall, in cooperation with the director of the department of administrative services, develop and implement within the limits of its appropriation, a five-year modernization program for the capitol complex. “The commission shall annually report to the general assembly its recommendations relating to its duties under this section. The report shall be submitted to the chief clerk of the house and the secretary of the senate during the month of January.” —Code of Iowa, Chapter 8A.373

2006 Annual Report Capitol Planning Commission, April 2006

The Capitol Planning Commission is authorized under Chapter 8A.371—378 of the Code of Iowa. “It shall be the duty of the commission to advise upon the location of statues, fountains and monuments and the placing of any additional buildings on the capitol grounds, the type of architecture and the type of construction of any new buildings to be erected on the state capitol grounds as now encompassed or as subsequently enlarged, and repairs and restoration thereof, and it shall be the duty of the officers, commissions, and councils charged by law with the duty of determining such questions to call upon the commission for such advice. “The commission shall, in cooperation with the director of the department of administrative services, develop and implement within the limits of its appropriation, a five-year modernization program for the capitol complex. “The commission shall annually report to the general assembly its recommendations relating to its duties under this section. The report shall be submitted to the chief clerk of the house and the secretary of the senate during the month of January.” —Code of Iowa, Chapter 8A.373

2007 Annual Report Capitol Planning Commission, January 2008

The Capitol Planning Commission is authorized under Chapter 8A.371—378 of the Code of Iowa. “It shall be the duty of the commission to advise upon the location of statues, fountains and monuments and the placing of any additional buildings on the capitol grounds, the type of architecture and the type of construction of any new buildings to be erected on the state capitol grounds as now encompassed or as subsequently enlarged, and repairs and restoration thereof, and it shall be the duty of the officers, commissions, and councils charged by law with the duty of determining such questions to call upon the commission for such advice. “The commission shall, in cooperation with the director of the department of administrative services, develop and implement within the limits of its appropriation, a five-year modernization program for the capitol complex. “The commission shall annually report to the general assembly its recommendations relating to its duties under this section. The report shall be submitted to the chief clerk of the house and the secretary of the senate during the month of January.” —Code of Iowa, Chapter 8A.373

2010 Annual Report Capitol Planning Commission, January 2011

The Capitol Planning Commission is authorized under Chapter 8A.371—378 of the Code of Iowa. “It shall be the duty of the commission to advise upon the location of statues, fountains and monuments and the placing of any additional buildings on the capitol grounds, the type of architecture and the type of construction of any new buildings to be erected on the state capitol grounds as now encompassed or as subsequently enlarged, and repairs and restoration thereof, and it shall be the duty of the officers, commissions, and councils charged by law with the duty of determining such questions to call upon the commission for such advice. “The commission shall, in cooperation with the director of the department of administrative services, develop and implement within the limits of its appropriation, a five-year modernization program for the capitol complex. “The commission shall annually report to the general assembly its recommendations relating to its duties under this section. The report shall be submitted to the chief clerk of the house and the secretary of the senate during the month of January.” —Code of Iowa, Chapter 8A.373

2009 Annual Report Capitol Planning Commission, January 2010

This 2011 Annual Report further summarizes the work of the Commission during the last year and provides planning recommendations for the future of the Capitol Complex. Please note that Iowa Code Chapter 8A.373 provides that before any physical changes are made to the state capitol complex "it shall be the duty of the officers, commissions, and councils charged by law with the duty of determining such questions to call upon" the Capitol Planning Commission for advice. The Capitol Planning Commission members, as well as DAS Staff, welcome the opportunity to discuss future projects at the request of any legislator.

USE OF SCALED SEMIVARIOGRAMS IN THE PLANNING SAMPLE OF SOIL PHYSICAL PROPERTIES IN SOUTHERN AMAZONAS, BRAZIL

There is a great lack of information from soil surveys in the southern part of the State of Amazonas, Brazil. The use of tools such as geostatistics may improve environmental planning, use and management. In this study, we aimed to use scaled semivariograms in sample design of soil physical properties of some environments in Amazonas. We selected five areas located in the south of the state of Amazonas, Brazil, with varied soil uses, such as forest, archaeological dark earth (ADE), pasture, sugarcane cropping, and agroforestry. Regular mesh grids were set up in these areas with 64 sample points spaced at 10 m from each other. At these points, we determined the particle size composition, soil resistance to penetration, moisture, soil bulk density and particle density, macroporosity, microporosity, total porosity, and aggregate stability in water at a depth of 0.00-0.20 m. Descriptive and geostatistical analyses were performed. The sample density requirements were lower in the pasture area but higher in the forest. We concluded that managed-environments had differences in their soil physical properties compared to the natural forest; notably, the soil in the ADE environment is physically improved in relation to the others. The physical properties evaluated showed a structure of spatial dependence with a slight variability of the forest compared to the others. The use of the range parameter of the semivariogram analysis proved to be effective in determining an ideal sample density.

USE OF SCALED SEMIVARIOGRAMS IN THE PLANNING SAMPLE OF SOIL CHEMICAL PROPERTIES IN SOUTHERN AMAZONAS, BRAZIL

The lack of information concerning the variability of soil properties has been a major concern of researchers in the Amazon region. Thus, the aim of this study was to evaluate the spatial variability of soil chemical properties and determine minimal sampling density to characterize the variability of these properties in five environments located in the south of the State of Amazonas, Brazil. The five environments were archaeological dark earth (ADE), forest, pasture land, agroforestry operation, and sugarcane crop. Regular 70 × 70 m mesh grids were set up in these areas, with 64 sample points spaced at 10 m distance. Soil samples were collected at the 0.0-0.1 m depth. The chemical properties of pH in water, OM, P, K, Ca, Mg, H+Al, SB, CEC, and V were determined at these points. Data were analyzed by descriptive and geostatistical analyses. A large part of the data analyzed showed spatial dependence. Chemical properties were best fitted to the spherical model in almost all the environments evaluated, except for the sugarcane field with a better fit to the exponential model. ADE and sugarcane areas had greater heterogeneity of soil chemical properties, showing a greater range and higher sampling density; however, forest and agroforestry areas had less variability of chemical properties.

Three-dimensional radiobiological dosimetry of kidneys for treatment planning in peptide receptor radionuclide therapy.

PURPOSE: Peptide receptor radionuclide therapy (PRRT) delivers high absorbed doses to kidneys and may lead to permanent nephropathy. Reliable dosimetry of kidneys is thus critical for safe and effective PRRT. The aim of this work was to assess the feasibility of planning PRRT based on 3D radiobiological dosimetry (3D-RD) in order to optimize both the amount of activity to administer and the fractionation scheme, while limiting the absorbed dose and the biological effective dose (BED) to the renal cortex. METHODS: Planar and SPECT data were available for a patient examined with (111)In-DTPA-octreotide at 0.5 (planar only), 4, 24, and 48 h post-injection. Absorbed dose and BED distributions were calculated for common therapeutic radionuclides, i.e., (111)In, (90)Y and (177)Lu, using the 3D-RD methodology. Dose-volume histograms were computed and mean absorbed doses to kidneys, renal cortices, and medullae were compared with results obtained using the MIRD schema (S-values) with the multiregion kidney dosimetry model. Two different treatment planning approaches based on (1) the fixed absorbed dose to the cortex and (2) the fixed BED to the cortex were then considered to optimize the activity to administer by varying the number of fractions. RESULTS: Mean absorbed doses calculated with 3D-RD were in good agreement with those obtained with S-value-based SPECT dosimetry for (90)Y and (177)Lu. Nevertheless, for (111)In, differences of 14% and 22% were found for the whole kidneys and the cortex, respectively. Moreover, the authors found that planar-based dosimetry systematically underestimates the absorbed dose in comparison with SPECT-based methods, up to 32%. Regarding the 3D-RD-based treatment planning using a fixed BED constraint to the renal cortex, the optimal number of fractions was found to be 3 or 4, depending on the radionuclide administered and the value of the fixed BED. Cumulative activities obtained using the proposed simulated treatment planning are compatible with real activities administered to patients in PRRT. CONCLUSIONS: The 3D-RD treatment planning approach based on the fixed BED was found to be the method of choice for clinical implementation in PRRT by providing realistic activity to administer and number of cycles. While dividing the activity in several cycles is important to reduce renal toxicity, the clinical outcome of fractionated PRRT should be investigated in the future.