Review: Efficiently performing periodic elements with modern adsorption technologies for arsenic removal
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REVIEW ARTICLE
Review: Efficiently performing periodic elements with modern adsorption technologies for arsenic removal Md. Jamal Uddin 1
&
Yeon-Koo Jeong 1
Received: 11 March 2020 / Accepted: 29 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Arsenic (As) toxicity is a global phenomenon, and it is continuously threatening human life. Arsenic remains in the Earth’s crust in the forms of rocks and minerals, which can be released into water. In addition, anthropogenic activity also contributes to increase of As concentration in water. Arsenic-contaminated water is used as a raw water for drinking water treatment plants in many parts of the world especially Bangladesh and India. Based on extensive literature study, adsorption is the superior method of arsenic removal from water and Fe is the most researched periodic element in different adsorbent. Oxides and hydroxides of Fe-based adsorbents have been reported to have excellent adsorptive capacity to reduce As concentration to below recommended level. In addition, Fe-based adsorbents were found less expensive and not to have any toxicity after treatment. Most of the available commercial adsorbents were also found to be Fe based. Nanoparticles of Fe-, Ti-, Cu-, and Zr-based adsorbents have been found superior As removal capacity. Mixed element-based adsorbents (Fe-Mn, Fe-Ti, Fe-Cu, Fe-Zr, Fe-Cu-Y, Fe-Mg, etc.) removed As efficiently from water. Oxidation of AsO33− to AsO43−and adsorption of oxidized As on the mixed element-based adsorbent occurred by different adsorbents. Metal organic frameworks have also been confirmed as good performance adsorbents for As but had a limited application due to nano-crystallinity. However, using porous materials having extended surface area as carrier for nano-sized adsorbents could alleviate the separation problem of the used adsorbent after treatment and displayed outstanding removal performances. Keywords Arsenic . Toxicity . Removal . Adsorption . Element . Cost effective
Introduction Arsenic (As) is a ubiquitous element in the natural environment. It has minor essentiality to living organism. In an adult human body, only 15 mg of As may present and it is helpful for the synthesis of amino acids and metabolism of zinc (Woolson 1975). However, it is a well-known metalloid that causes various toxic effects on living flora and fauna. As a result, it has been become one of high priority toxic metals in public health and sanitation area especially in drinking water and wastewater treatment systems.
Responsible Editor: Tito Roberto Cadaval Jr * Md. Jamal Uddin [email protected] 1
Department of Environmental Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Republic of Korea
Arsenic is the 20th naturally abundant element in earth, the 14th in seawater, and the 12th position in human body (Mohan and Pittman 2007). It has atomic weight of 74.91 and 5.73 specific gravity. It is a silver-gray brittle crystalline solid, present 0.5–2.5 mg/kg in most rocks. In
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