Removal efficiency

Groundwater remediation by nanoparticles has become a major interest in recent years. This report presents the ability of hexavalent chromium removal in aqueous using iron (Fe0) nanoparticles. Cr(VI) is a major pollution of groundwater and more toxic than Cr(III). Fe0 reduces Cr(VI), transforming Cr(VI) to nontoxic Cr(III). At a dose of 0.2g/l iron (Feo) nanoparticles, 100% of Cr(VI) 5mg/l was removed after only 20 minutes. The Cr(VI) removal efficiency increased with decreasing initial pH.

5p tuanlocmuido 13-12-2012 20 3   Download

Securities regulators oversee Canada’s capital markets and the advisers who sell and manage securities traded in those markets. We strive to protect investors from unfair, improper and fraudulent practices while fostering a fair and efficient marketplace. You can contact your local securities regulator listed on page 20 to check the registration of an individual or firm, and to find out if they have been involved in any disciplinary actions.

24p quaivatdo 18-11-2012 19 3   Download

The United States has been in the process of destroying its chemical munitions for well over a decade. Initially, the U.S. Army, guided by recommendations from the National Research Council (NRC), decided to use incineration as its destruction method at all sites. However, citizens in some states with stockpile storage sites oppose incineration on the grounds that the exact nature of the effluents escaping from the stacks cannot be determined.

66p camnhung_1 14-12-2012 24 3   Download

In addition to these three roles, there are other important contributors to the success of the project: Perhaps the most important of these are Managers. While their role evolves in Scrum, they remain critically important – they support the team by respecting the rules and spirit of Scrum, they help remove impediments that the team identifies, and they make their expertise and experience available to the team.

6p lenh_hoi_xung 21-02-2013 19 3   Download

The following paragraphs present a synthesis of the development of the management control concept in the literature. We have pointed out the existence of different trends of thought, which have gradually evolved as organisations and markets have transformed, introducing new variables for building efficient control systems adapted to social changes, to the process of internationalisation and to increased market competition (Jaeger and Balinga, 1985; Neimark and Tinker, 1986).

7p nhacchovina 25-02-2013 17 2   Download

A competitive partial-equilibrium spatial model with heterogeneous goods is constructed to evaluate effects of the removal of tariffs, tariff-rate quotas, and sanitary regulations on world poultry trade. The model distinguishes between ìhigh-valueî (mostly white meat) and ìlow-valueî (mostly dark meat) poultry products and simulates the trade flows between eight exporting and importing countries and regions. Removing all barriers simultaneously has larger impact on trade than only removing tariffs and tariff-rate quotas.

50p loginnhanh 22-04-2013 21 2   Download

With PHP for the World Wide Web, Fourth Edition: Visual QuickStart Guide, readers can start from the beginning to get a tour of the programming language, or look up specific tasks to learn just what they need to know. This task-based visual reference guide uses step-by-step instructions and plenty of screenshots to teach beginning and intermediate users this popular open-source scripting language. Leading technology author Larry Ullman guides readers through the latest developments including use and awareness of HTML5 with PHP.

481p quannguyenhai 17-04-2012 168 74   Download

Introduction: Amphetamines are a group of drugs stimulating the central nervous system; they act on the cerebral cortex to enhance psychic activities, resulting in the removal of general fatigue and drowsiness and thus in the transient improvement of working efficiency. Their abuse causes dependence, hallucination, delusion and changes in personality. Because of such harmfulness of the drugs, their use and possession are prohibited by the Stimulant Drugs Control Law in Japan [1].

15p bigbaby87 01-09-2010 77 19   Download

This module provides students with the knowledge and skills to use Group Policy to manage user environments, and install, modify, repair and remove software more efficiently. Students will learn to manage user environments by configuring the Administrative Template settings, using Group Policy to run scripts at designated times, and redirecting folders to a central location. They will also learn how software installation policies take advantage of the Microsoft® Windows® Installer to deliver software to computers....

82p vuthuong 11-08-2009 124 14   Download

TDictionary represents a generic collection of key-value pairs. This class provides a mapping from a collection of keys to a collection of values. When you create a TDictionary object, you can specify various combinations of initial capacity, equality operation, and initial content. You can add a key that is associated with a corresponding value with the Add or AddOrSetValue methods. You can remove entries with Remove or Clear, which removes all key-value pairs. Adding or removing a key-value pair and looking up a key are efficient, close to O(1), because keys are hashed.

178p hoangchung_dtvt 12-12-2012 31 7   Download

In section 2, there is an illustration of the source and types of industrial contaminants in many parts of the world. It is essential to understand the characteristic of industrial discharge in order to have an idea for ways to reduce or remove the contaminants for a sustainable tomorrow. It is required to understand the impacts of industrial waste to the environment (freshwater, seawater, land) in order to design highly efficient treatment and developing effective remedial methods.

226p lulanphuong 30-03-2012 30 6   Download

high heats by mass removal. Their most common use is as an external heat shield to protect supersonic aerospace vehicles from an excessive buildup of heat caused by air friction at the surface. The ablative material must have a low thermal conductivity in order that the heat may remain concentrated in the thin surface layer. As the surface of the ablator melts or sublimes, it is wiped away by the frictional forces that simultaneously heat newly exposed surfaces. The heat is carried off with the material removed. The less material that is lost, the more efficient is the ablative material....

1115p khangoc2391 11-08-2012 27 5   Download

The EU needs to protect its citizens and their rights from threats and challenges and further remove obstacles to circulation of citizens in Europe. This includes fighting crime and corruption, controlling our external borders and ensuring the respect of the rule of law and of fundamental rights, with the right balance between security and mobility. It also needs a well functioning and efficient justice system to support growth, entrepreneurship and attract investors.

0p lenh_hoi_xung 01-03-2013 28 5   Download

Aimed at helping Java developers, Servlet/JSP developers, and J2EE developers pass the Sun Certified Web Component Developer Exam (SCWCD 310-081), this study guide covers all aspects of the Servlet and JSP technology that Sun has determined necessary. This new edition adds aspects of servlet/JSP development, such as the Expression language, and updated materials of servlets with a particular focus on using filters to make request processing more efficient.

559p ringphone 03-05-2013 36 7   Download

Although there is no economic freedom index for metropolitan areas, there are data available on taxes and spending. One of the most important components of the various economic freedom indices is the tax burden. Taxes remove resources from private decision- makers and put them in the hands of elected officials and bureau- crats. The latter face much weaker incentives to use those resources efficiently and lack the information to be able to do so. As a result, jurisdictions with higher tax burdens will tend to have less prosper- ous economies.

55p trinhcaidat 19-04-2013 40 4   Download

The outer layer had significantly higher SG and bending properties than the inner layer. The SG varied along the culm height. The top portions had consistently higher SG than the base. Bending strength had a strong positive correlation with SG. In order to industrially use bamboo strips efficiently, it is advisable to remove minimal surface material to produce high strength bamboo composites. Compression properties parallel to the longitudinal direction was significantly higher than perpendicular to the longitudinal direction.

79p loixinloi 08-05-2013 21 4   Download

Limited floor space and smaller fiber counts often dictate that multiple pieces of communications apparatus share common equipment racks. The FL1000 is designed to be mounted within standard 19" or 23" EIA equipment racks. Standard flush mount capability also makes this panel well-suited to cabinet installations. The left/right orientation of the individual angled adapters and retainers allows the easy exit of the jumpers from the panel. A removable rear door on the 24 termination panels allows efficient access the interior of the panel for the routing and termination of fiber cables.

28p thuyvan 13-08-2009 67 3   Download

There are a vast number of technologies and practices that can be employed to reduce GHG emissions for the purpose of generating offsets. In addition, GHG emissions can be offset through certain kinds of land use and forestry practices that remove CO2 from the atmosphere. According to a survey from 2006, projects involving land use and forestry practices are in fact the most common type being funded by voluntary offset purchases. 12 The next most common type of project involves renewable energy production, followed by demand-side energy efficiency improvements (Table 1).

28p taisaovanchuavo 26-01-2013 15 3   Download

Copenhagen Airport is more than just an efficient traffic hub - much more. It is also Denmark’s window to the world. For this reason, Copenhagen Airports A/S wants to display the very best Denmark and the rest of Scandinavia has to offer in the fields of architecture, design and fine art. With its beautiful surroundings and richness in experiences for the passenger, the airport removes some of the tedious waiting time inherent in travelling and serves as a stunning business card for Denmark....

31p dangsuynghi 27-03-2013 13 3   Download

A sewage treatment authority received an 1 l-pound credit on its discharge permit for 22 pounds of phosphorus removed from nonpoint sources when the authority installed sewers in a small development that had been using septic tanks. Incentives for additional trades were eliminated because population growth slowed and the treatment plants signiikantly improved the operating efficiency of their existing treatment equipment. These ...

23p tainhacmienphi 19-02-2013 19 2   Download