Arsenic removal studies in some ground waters of West Bengal, India

Arsenic removal from water/wastewater using adsorbents—A critical review

“…Coagulation/electrocoagulation/coprecipitation: [405,442, Alum coagulation Durable powder chemicals are available; relatively low capital cost and simple in operation; effective over a wider range of pH permissible limits for drinking water in different countries are given in Table 1.…”

Removal of arsenic from water by zero-valent iron

“…The release of arsenic from natural processes can be caused by the reduction of iron hydroxides and the oxidation of pyrite minerals including orpiment (As 2 S 3 ) and realgar (As 2 S 2 ) [3,4]. Naturally occurring arsenic in drinking water supplies may affect more than 100 million people worldwide, including countries like Bangladesh, India, China, Chile, Argentina, Mexico, Hungry, Taiwan, Vietnam, Japan, New Zealand, Germany, and the United States [5][6][7][8][9][10][11].…”

Analytical survey of arsenic in geothermal waters from sites in Kyushu, Japan, and a method for removing arsenic using magnetite

“…In the last decade, much research has been done on arsenic removal from contaminated groundwater, surface water, and soil using adsorption and ionexchange technologies (Pande et al 1997;Choong et al 2007;Mohan and Pittman 2007;Henke 2009). Iron-based adsorbents such as zerovalent iron (Krishna et al 2001;Zhang et al 2004;Daus et al 2004;Leupin et al 2005;Bang et al 2005;Tyrovola et al 2006;Cornejo et al 2008), iron (oxy)(hydr)oxides (Wilkie and Hering 1996;Thirunavukkarasu et al 2003a;Sylvester et al 2007;Zaspalis et al 2007;Guan et al 2008;Tuutijärvi et al 2009), and their composites (Joshi and Chaudhuri 1996;Campos 2002;Katsoyiannis and Zouboulis 2002;Thirunavukkarasu et al 2003b;Vaishya and Gupta 2004;Gu and Deng 2007;Mondal et al 2008;Fierro et al 2009) have frequently been used.…”