Researchers at the University of Georgia in the United States have invented a method to remove arsenic from soil.
Scientists in Georgia state that arsenic pollution is an increasingly serious environmental problem, especially in the Indian subcontinent. Although a few years ago researchers used genetic technology to create “arsenic†plants that could be planted on contaminated sites, arsenic contamination remains a major problem.
Scientists say that most of the accumulated arsenic in the soil is fixed in the plant's root system, making it difficult to safely handle it. Now, the team led by geneticist Richard Meagher has discovered a way to transfer arsenic from the roots of plants to the leaves. This is an effective tool for cleaning up thousands of arsenic-contaminated sites that pose a serious threat to human health. The study was published in the "National Academy of Sciences".
Zhang Liying Translated from: sciencedaily
According to the medicalnewstoday website, reported on April 14, 2006: Arsenic pollution is a serious environmental problem facing the world today, and this problem is further worsening, especially in the Indian subcontinent, whose seriousness has caused widespread concern. Researchers at the University of Georgia in the United States began experimenting several years ago to use genetic technology to produce plants that can safely absorb arsenic, a toxic element, and the progress that has been made is expected to restore soils that have been exposed to deep arsenic due to human use. This plant can be widely grown in contaminated areas. In addition, the researchers believe that genetic techniques may also transform new biological tools that can absorb other chemical contaminants.
In fact, researchers faced a difficult problem that needed to be solved in the early stage. The arsenic that is absorbed from the soil will still be present in large quantities at the roots of the plant, making it difficult to treat these contaminants. Now, a team led by geneticist Richard M. Aghol has discovered a way to transfer arsenic from plant roots to leaves or stems. Once arsenic is concentrated in the leaves or stems of the plant, collecting and destroying these contaminants becomes cheap and safe. In areas that face severe arsenic pollution and have already placed a huge threat on human health, this is undoubtedly one of the most effective ways to purify the soil.
The results of the research conducted by the Miaguer Research Group were published in the Journal of the National Academy of Sciences. Other authors of the paper include Oman Pakkas-Dankehel and Elizabeth McKinney from the University of Georgia, and Barry Rosen of Wayne State University.
Mi Agehol said: “There have been many reports in the world that the arsenic content in soil and drinking water has exceeded the standards. Among them, India and Bangladesh have the most serious situation. Nearly 400 million people are at risk of arsenic poisoning. And unfortunately, people in this area often spend a lot of money for excavation and burying the dead, making it difficult for new technology to be used in this area and unable to arsenic-purify large areas of contaminated land. The world’s most heavily polluted areas have still not been cleaned up and cleaned up.†Among them, the region with the most serious arsenic contamination is the Ganges region of India. In fact, in the “green revolution†of the 1960s and 1970s, rice was widely planted in flood-prone areas. Workers used wells to drill wells through soil and rocks. Accompanying this was the emergence of arsenic pollution. Pollution gradually spread out from the water pollution, and the land began to suffer damage. This problem has become even more complicated and severe. It is not just a consequence of industrial accidents or industrialization.
The seriousness of the problem is still further developed. The paper published in the "Journal of the National Academy of Sciences" stated that the World Health Organization has made predictions that long-term living in arsenic severely exceeds the standard, it is easy to cause the occurrence of large-scale spread of diseases. The World Health Organization said: "What's staggering is that in India and Bangladesh, 1 in 10 people will eventually die from serious diseases caused by arsenic poisoning."
In response to this serious problem currently facing the world, researchers have developed a new strategy called "phytoremediation of heavy metals", which uses toxin-absorbing plants to clean contaminated soil. Reduced levels of pollution will reduce the degree of harm to the human body and can be reused. This technology is also called "plant management" technology. At present, there are still large areas of arsenic-contaminated land in the world. Therefore, this new technology is very promising for development and utilization.
According to reports, in 2002 the journal "Natural Biotechnology" published a research project of the Miaguer group. They inserted two irrelevant genes from E. coli into the genome of the experimental model plant Arabidopsis, which is also a member of the mustard plant family. This plant not only resists damage from arsenic pollution but also absorbs the toxin and stores it in leaves. It absorbs three times as much arsenic to ordinary plants. However, it is still not efficient enough to grow large amounts of this genetically modified plant in arsenic-contaminated areas because a large amount of arsenic must be transferred to the leaves of plants for further safe treatment. In this reported study, the team discovered a single gene, ACR2, in the Arabidopsis genome that helps plants transfer arsenic toxins stored in the roots. Plants with this single gene are better able to transfer toxins from the roots to the leaves, and their transfer capacity is 16 times that of common wild Arabidopsis. This experiment finally determined the mechanism of activity of arsenic toxins in the roots.
Mi Ageher said: "We hope that the ability of this plant to absorb arsenic can be increased by 35 to 50 times. Now that we have fully understood its working mechanism, we believe that it is entirely possible to realize this desire." Humans may also use this new technology to produce more plants that can “eat†arsenic, such as cotton poplar, rice, willow, sweet rubber, wetland plants, and lotus flowers, making them machines for sweeping the soil.
Scientists in Georgia state that arsenic pollution is an increasingly serious environmental problem, especially in the Indian subcontinent. Although a few years ago researchers used genetic technology to create “arsenic†plants that could be planted on contaminated sites, arsenic contamination remains a major problem.
Scientists say that most of the accumulated arsenic in the soil is fixed in the plant's root system, making it difficult to safely handle it. Now, the team led by geneticist Richard Meagher has discovered a way to transfer arsenic from the roots of plants to the leaves. This is an effective tool for cleaning up thousands of arsenic-contaminated sites that pose a serious threat to human health. The study was published in the "National Academy of Sciences".
Zhang Liying Translated from: sciencedaily
According to the medicalnewstoday website, reported on April 14, 2006: Arsenic pollution is a serious environmental problem facing the world today, and this problem is further worsening, especially in the Indian subcontinent, whose seriousness has caused widespread concern. Researchers at the University of Georgia in the United States began experimenting several years ago to use genetic technology to produce plants that can safely absorb arsenic, a toxic element, and the progress that has been made is expected to restore soils that have been exposed to deep arsenic due to human use. This plant can be widely grown in contaminated areas. In addition, the researchers believe that genetic techniques may also transform new biological tools that can absorb other chemical contaminants.
In fact, researchers faced a difficult problem that needed to be solved in the early stage. The arsenic that is absorbed from the soil will still be present in large quantities at the roots of the plant, making it difficult to treat these contaminants. Now, a team led by geneticist Richard M. Aghol has discovered a way to transfer arsenic from plant roots to leaves or stems. Once arsenic is concentrated in the leaves or stems of the plant, collecting and destroying these contaminants becomes cheap and safe. In areas that face severe arsenic pollution and have already placed a huge threat on human health, this is undoubtedly one of the most effective ways to purify the soil.
The results of the research conducted by the Miaguer Research Group were published in the Journal of the National Academy of Sciences. Other authors of the paper include Oman Pakkas-Dankehel and Elizabeth McKinney from the University of Georgia, and Barry Rosen of Wayne State University.
Mi Agehol said: “There have been many reports in the world that the arsenic content in soil and drinking water has exceeded the standards. Among them, India and Bangladesh have the most serious situation. Nearly 400 million people are at risk of arsenic poisoning. And unfortunately, people in this area often spend a lot of money for excavation and burying the dead, making it difficult for new technology to be used in this area and unable to arsenic-purify large areas of contaminated land. The world’s most heavily polluted areas have still not been cleaned up and cleaned up.†Among them, the region with the most serious arsenic contamination is the Ganges region of India. In fact, in the “green revolution†of the 1960s and 1970s, rice was widely planted in flood-prone areas. Workers used wells to drill wells through soil and rocks. Accompanying this was the emergence of arsenic pollution. Pollution gradually spread out from the water pollution, and the land began to suffer damage. This problem has become even more complicated and severe. It is not just a consequence of industrial accidents or industrialization.
The seriousness of the problem is still further developed. The paper published in the "Journal of the National Academy of Sciences" stated that the World Health Organization has made predictions that long-term living in arsenic severely exceeds the standard, it is easy to cause the occurrence of large-scale spread of diseases. The World Health Organization said: "What's staggering is that in India and Bangladesh, 1 in 10 people will eventually die from serious diseases caused by arsenic poisoning."
In response to this serious problem currently facing the world, researchers have developed a new strategy called "phytoremediation of heavy metals", which uses toxin-absorbing plants to clean contaminated soil. Reduced levels of pollution will reduce the degree of harm to the human body and can be reused. This technology is also called "plant management" technology. At present, there are still large areas of arsenic-contaminated land in the world. Therefore, this new technology is very promising for development and utilization.
According to reports, in 2002 the journal "Natural Biotechnology" published a research project of the Miaguer group. They inserted two irrelevant genes from E. coli into the genome of the experimental model plant Arabidopsis, which is also a member of the mustard plant family. This plant not only resists damage from arsenic pollution but also absorbs the toxin and stores it in leaves. It absorbs three times as much arsenic to ordinary plants. However, it is still not efficient enough to grow large amounts of this genetically modified plant in arsenic-contaminated areas because a large amount of arsenic must be transferred to the leaves of plants for further safe treatment. In this reported study, the team discovered a single gene, ACR2, in the Arabidopsis genome that helps plants transfer arsenic toxins stored in the roots. Plants with this single gene are better able to transfer toxins from the roots to the leaves, and their transfer capacity is 16 times that of common wild Arabidopsis. This experiment finally determined the mechanism of activity of arsenic toxins in the roots.
Mi Ageher said: "We hope that the ability of this plant to absorb arsenic can be increased by 35 to 50 times. Now that we have fully understood its working mechanism, we believe that it is entirely possible to realize this desire." Humans may also use this new technology to produce more plants that can “eat†arsenic, such as cotton poplar, rice, willow, sweet rubber, wetland plants, and lotus flowers, making them machines for sweeping the soil.
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