Nanoscientists develop new kind of portable water purification system

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first_imgWater purification device undergoing field trials in India and its performance evaluation. (A) Schematic diagram of the device. (B) Actual photograph of the device. Construction and assembly of the device are simple and can be done locally. The antimicrobial composition is used as granules and kept in the membrane filter. Carbon block is positioned just before the tap. Carbon block may also be used as a multilayer axial block, comprising adsorbents for specific regional contaminants such as arsenic, iron, and lead. Credit: PNAS, doi: 10.1073/pnas.1220222110 Journal information: Proceedings of the National Academy of Sciences Citation: Nano-scientists develop new kind of portable water purification system (2013, May 7) retrieved 18 August 2019 from https://phys.org/news/2013-05-nano-scientists-kind-portable-purification.html © 2013 Phys.org Scientists evaluate different antimicrobial metals for use in water filters (Phys.org) —Researchers at India’s Institute of Technology Madras have developed a new kind of portable water purification system based on nanoparticle filtration. In their paper published in the Proceedings of the National Academy of Sciences, the team explains how their new device does its job—it employs nanoparticles to remove not just biological hazards, but toxic heavy metals as well.center_img The researchers note that access to clean drinking water is still a major worldwide problem—making it available to everyone, they say, would save approximately 2 million lives a year (approximately 42.6 percent of deaths are due to diarrhea alone and impact mostly children). To help reach the UN millennium development goal of doubling the number of people with sustainable access to safe drinking water by 2015, the team has been applying nanoparticle technology to the problem. The system they have developed is a two-stage filtration process that provides 10 liters of clean water in just an hour’s time. The biggest challenge, the team says, was figuring out how to deliver silver ions into the water to be processed, without using any electricity. The process also had to use a minimal amount of silver ions to meet international safety standards. The answer, they say, was to use a new material that employs silver nanoparticles that are trapped in tiny cage-like structures made of other clay materials.Other nanoparticles are used to create other materials that serve as filters, killing microbes and sucking heavy metals out of the water, making it safe to drink or use for cooking. The first stage of the process kills viruses, bacteria and other dangerous micro-biota. The second stage absorbs heavy metals such as lead and arsenic.The result is an extremely inexpensive portable water purification device—the system cost is comparable to other portable filtration systems, but the processing itself comes to less than $3 per year. The filters are good for approximately one year (3,600 liters) and filtration can be run more than once per day if needed. The researchers believe their device is capable of providing all the drinking water a family of four would need.The researchers have not yet made it clear who will manufacture the new device or when it might be made available for sale. Explore further More information: Biopolymer-reinforced synthetic granular nanocomposites for affordable point-of-use water purification, PNAS, Published online before print May 6, 2013, doi: 10.1073/pnas.1220222110AbstractCreation of affordable materials for constant release of silver ions in water is one of the most promising ways to provide microbially safe drinking water for all. Combining the capacity of diverse nanocomposites to scavenge toxic species such as arsenic, lead, and other contaminants along with the above capability can result in affordable, all-inclusive drinking water purifiers that can function without electricity. The critical problem in achieving this is the synthesis of stable materials that can release silver ions continuously in the presence of complex species usually present in drinking water that deposit and cause scaling on nanomaterial surfaces. Here we show that such constant release materials can be synthesized in a simple and effective fashion in water itself without the use of electrical power. The nanocomposite exhibits river sand-like properties, such as higher shear strength in loose and wet forms. These materials have been used to develop an affordable water purifier to deliver clean drinking water at US $2.5/y per family. The ability to prepare nanostructured compositions at near ambient temperature has wide relevance for adsorption-based water purification. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img

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Bishop calls for prayer as Colombians says ‘no’ to peace…

first_img Rector Shreveport, LA Rector Tampa, FL Missioner for Disaster Resilience Sacramento, CA Assistant/Associate Rector Washington, DC Rector (FT or PT) Indian River, MI Family Ministry Coordinator Baton Rouge, LA Press Release Service Course Director Jerusalem, Israel Cathedral Dean Boise, ID Bishop Diocesan Springfield, IL Rector Martinsville, VA Remember Holy Land Christians on Jerusalem Sunday, June 20 American Friends of the Episcopal Diocese of Jerusalem Rector Collierville, TN Assistant/Associate Priest Scottsdale, AZ Rector Albany, NY Virtual Celebration of the Jerusalem Princess Basma Center Zoom Conversation June 19 @ 12 p.m. ET Assistant/Associate Rector Morristown, NJ Priest-in-Charge Lebanon, OH Submit a Press Release Featured Events Associate Rector Columbus, GA Youth Minister Lorton, VA Tags Seminary of the Southwest announces appointment of two new full time faculty members Seminary of the Southwest Episcopal churches throughout the Diocese of Colombia have stood with Colombians affected by the conflict. They have provided pastoral care, and humanitarian assistance and shelter to those affected by and internally displaced more than a half-century of armed conflict. Photo: Lynette Wilson/Episcopal News Service[Episcopal News Service] Colombia Bishop Francisco Duque is calling for prayer in the aftermath of an Oct. 2 popular vote in which voters narrowly rejected a peace deal that would have ended more than 50 years of armed conflict between the government and the Revolutionary Armed Forces of Colombia, or FARC.“We call on the church to pray a lot so that the necessary accord is reached and so that we can all live as brothers,” said Duque. “Let’s achieve a peace that brings justice, reparations and not repetition.”Sunday’s vote defied polls that predicted overwhelming support for the peace accord. With a total of 99.8 percent of all ballots tallied, 50.2 percent of voters rejected the accord, and 49.8 percent voted “yes” for peace.“We’re still in shock. We haven’t processed the results yet. It was a vote based on emotion, opinion. The people who showed up to vote ‘no’ didn’t want to let anyone know their opinion before so they wouldn’t be judged, but when they went to the polls they expressed themselves,” said Duque in an Oct. 3 interview with Episcopal News Service.“Earlier polling projected that more than 60 percent of the population would vote yes, but the reality was very different, and many people didn’t even turn out to vote,” he said.Less than 38 percent of voters went to the polls.The “no vote” put an end to four years of peace talks. The Colombian government and the FARC, the largest guerrilla group in the country, have been negotiating in Havana, Cuba.The referendum wasn’t legally necessary to implement the peace accord negotiated between the government and FARC. However, the president of Colombia, Juan Manuel Santos, thought that a popular vote would lend legitimacy to the accord.On the night of Oct. 2, Santos regretfully recognized the referendum’s outcome. “Today I address the country as president of all Colombians, of both those who voted yes and those who voted no. I called for a referendum. The majority, be it by a very narrow margin, said ‘no.’ I am the first to recognize the result,” he said.Via Twitter on Oct. 2 the FARC wrote: “To the Colombian people who dream of peace, [you can] count on us. Peace will prevail.”In June, the government and the FARC signed a historic ceasefire, which Santos said on Oct. 4 that he would extend until Oct. 31.The guerilla leader, Rodrigo Londoño, alias “Timochenko,” issued a statement confirming the ceasefire from Cuba following the vote’s results. “FARC-EP reiterates its willingness to use only words as weapons for building toward the future,” he wrote.Duque indicated that the reaffirmation of the ceasefire is a hopeful sign.“The people have had doubts about what the FARC will get [after the accord], but all of us want an end to the war. As a church we see our role will be to reconcile brothers with such polarized opinions and to pursue building peace together,” he said.Though, he added, the church recognizes that the way forward will not be easy.Last May, before the ceasefire, the Episcopal Diocese of Colombia agreed at a national convention to support the peace process, offering the government its facilities as “spaces for exercises in reconciliation to succeed in building a sustainable peace.”(The Episcopal Diocese of Colombia is one of seven dioceses that make up the Episcopal Church’s ninth province, which covers Central and South America and the Caribbean.)Colombians most affected by the war voted ‘yes.’ Since the mid-1960s government forces, left-wing guerrillas and right-wing paramilitaries have been fighting a civil war rooted in inequality that has killed more than 220,000 Colombians. Some 6.7 million people are displaced inside Colombia, about 13 percent of the 47 million inhabitants. Another 360,000 refugees have fled abroad, most to Ecuador – which hosts the largest number of refugees in Latin America, and another 170,000 have fled to Venezuela.Churches throughout the Diocese of Colombia have stood with those affected by the conflict. They have provided pastoral care, and humanitarian assistance and shelter to Colombians affected by and internally displaced more than a half-century of armed conflict.The church also has assisted Colombian refugees to rebuild their lives in Ecuador.According to information gathered by the magazine Semana of Colombia, a majority of voters in areas most affected by armed conflict supported the peace accord. In mountainous regions like Chocó, Caquetá, and Nariiño where the presence of war lingers, more than 60 percent of the votes were “yes” votes for peace.Former Colombian President Álvaro Uribe led the “no vote,”  saying it was too lenient on the rebels.— Clara Villatoro is a freelance journalist based in El Salvador. Lynette Wilson, an editor and reporter for Episcopal News Service, contributed to this report. The Church Investment Group Commends the Taskforce on the Theology of Money on its report, The Theology of Money and Investing as Doing Theology Church Investment Group Submit a Job Listing Submit an Event Listing Episcopal Charities of the Diocese of New York Hires Reverend Kevin W. VanHook, II as Executive Director Episcopal Charities of the Diocese of New York Rector Hopkinsville, KY New Berrigan Book With Episcopal Roots Cascade Books Rector Bath, NC This Summer’s Anti-Racism Training Online Course (Diocese of New Jersey) June 18-July 16 In-person Retreat: Thanksgiving Trinity Retreat Center (West Cornwall, CT) Nov. 24-28 Inaugural Diocesan Feast Day Celebrating Juneteenth San Francisco, CA (and livestream) June 19 @ 2 p.m. PT Associate Rector for Family Ministries Anchorage, AK Director of Music Morristown, NJ Bishop calls for prayer as Colombians says ‘no’ to peace accord Canon for Family Ministry Jackson, MS Rector Belleville, IL Rector Pittsburgh, PA Curate Diocese of Nebraska Rector and Chaplain Eugene, OR An Evening with Presiding Bishop Curry and Iconographer Kelly Latimore Episcopal Migration Ministries via Zoom June 23 @ 6 p.m. ET Colombia Peace Agreement The Church Pension Fund Invests $20 Million in Impact Investment Fund Designed to Preserve Workforce Housing Communities Nationwide Church Pension Group Join the Episcopal Diocese of Texas in Celebrating the Pauli Murray Feast Online Worship Service June 27 Ya no son extranjeros: Un diálogo acerca de inmigración Una conversación de Zoom June 22 @ 7 p.m. ET Director of Administration & Finance Atlanta, GA Rector Knoxville, TN Curate (Associate & Priest-in-Charge) Traverse City, MI Featured Jobs & Calls AddThis Sharing ButtonsShare to PrintFriendlyPrintFriendlyShare to FacebookFacebookShare to TwitterTwitterShare to EmailEmailShare to MoreAddThis Rector Smithfield, NC TryTank Experimental Lab and York St. John University of England Launch Survey to Study the Impact of Covid-19 on the Episcopal Church TryTank Experimental Lab By Clara Villatoro Posted Oct 5, 2016 Rector Washington, DC Rector/Priest in Charge (PT) Lisbon, ME Episcopal Migration Ministries’ Virtual Prayer Vigil for World Refugee Day Facebook Live Prayer Vigil June 20 @ 7 p.m. ET Associate Priest for Pastoral Care New York, NY Priest Associate or Director of Adult Ministries Greenville, SClast_img

Win free online sponsorship and donation processing from Bmycharity

first_imgWin free online sponsorship and donation processing from Bmycharity Howard Lake | 25 October 2004 | News AddThis Sharing ButtonsShare to TwitterTwitterShare to FacebookFacebookShare to LinkedInLinkedInShare to EmailEmailShare to WhatsAppWhatsAppShare to MessengerMessengerShare to MoreAddThis Tagged with: Consulting & Agencies Digital Trading About Howard Lake Howard Lake is a digital fundraising entrepreneur. Publisher of UK Fundraising, the world’s first web resource for professional fundraisers, since 1994. Trainer and consultant in digital fundraising. Founder of Fundraising Camp and co-founder of GoodJobs.org.uk. Researching massive growth in giving.center_img Ben Brabyn, Managing Director of Bmycharity, explains: “We work with some of the most imaginative and talented professional fundraisers in the UK and we’re launching this competition to find more. Our services are designed to give fundraisers maximum creative flexibility and fundraising reach. “We’re celebrating the fourth birthday of Bmycharity with this special opportunity for four charities to use the services that have helped Cancer Research UK, Oxfam, Shelter, Children with Leukaemia, Asthma UK and many more organisations to lead the way in online sponsorship and fundraising. “If you think you can make the most of this opportunity in online fundraising, tell us how and we’ll help you to prove it – for free.”Entries should be sent to [email protected] with the subject “Bmycharity competition” by 12 November 2004.The terms and conditions of this competition are:The competition is open to charities of any size and Bmycharity will bear all the costs of providing the service including all bank charges. Each winner will be able to raise up to £256,000 after which standard Bmycharity charges will apply. Total savings to each winning charity may be more than £16,000.There is no obligation to use Bmycharity services after the free period.  14 total views,  1 views today AddThis Sharing ButtonsShare to TwitterTwitterShare to FacebookFacebookShare to LinkedInLinkedInShare to EmailEmailShare to WhatsAppWhatsAppShare to MessengerMessengerShare to MoreAddThis Online sponsorship and donations service Bmycharity is celebrating its fourth birthday with a competition offering four charities the prize of free online sponsorship and donation processing on their own dedicated Web site for a year.Bmycharity will award the prizes, which it says could be worth over £1 million, to the four charities that give the best answer to the following question before 12 November 2004:“How would you make the most of free online fundraising and sponsorship services for a year?” Advertisementlast_img

Raise Funds with you own FREE online fairtrade shop!

first_img Watch this video to learn how the ETHICTRADE idea could work for you Howard Lake | 25 August 2009 | News  40 total views,  4 views today AddThis Sharing ButtonsShare to TwitterTwitterShare to FacebookFacebookShare to LinkedInLinkedInShare to EmailEmailShare to WhatsAppWhatsAppShare to MessengerMessengerShare to MoreAddThis Raise Funds with you own FREE online fairtrade shop! AddThis Sharing ButtonsShare to TwitterTwitterShare to FacebookFacebookShare to LinkedInLinkedInShare to EmailEmailShare to WhatsAppWhatsAppShare to MessengerMessengerShare to MoreAddThiscenter_img About Howard Lake Howard Lake is a digital fundraising entrepreneur. Publisher of UK Fundraising, the world’s first web resource for professional fundraisers, since 1994. Trainer and consultant in digital fundraising. Founder of Fundraising Camp and co-founder of GoodJobs.org.uk. Researching massive growth in giving. Tagged with: Trading  39 total views,  3 views today Advertisementlast_img

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