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Công trình này tập trung vào việc phát triển các bộ lọc sinh học cho việc loại bỏ và phục hồi của thạch tín (As) từ dung dịch nước, dựa trên các thuộc tính tự nhiên của lúa miến sinh khối kim loại hấp thụ. Khi hấp phụ năng lực ở pH 4.5 và 60 phút của thời gian tiếp xúc là 8,43 mg / g và 6,99 mg / g cho sinh khối tự do và bất động, tương ứng. Sau khi HCl điều trị, Như đã được khôi phục trong 91% và 95% từ miễn phí và cố. | Natural Arsenic in Groundwater Occurrence Remediation and Management -Bundschuh Bhattacharya and Chandrasekharam eds 2005 Taylor Francis Group London ISBN 04 1536 700 X Removal and recovery of arsenic from aqueous solutions by sorghum biomass Z.I. Gonzalez-Acevedo I. Cano-Aguilera A.F. Aguilera-Alvarado Facultad de Química Universidad de Guanajuato Guanajuato Gto. México ABSTRACT This work focuses on the development of bio-filters for the removal and recovery of arsenic As from aqueous solutions based on the natural properties of sorghum biomass to adsorb metals. The As adsorption capacity at pH 4.5 and 60 min of contact time was 8.43 mg g and 6.99 mg g for free and immobilized biomass respectively. After HCl treatment As was recovered in 91 and 95 from free and immobilized As saturated biomass respectively. In flow conditions the adsorption s capacity of the immobilized biomass packed in a column was 143 mg cm3 when the input rate of the arsenic solution was 3 mL min. The designed column size to remove As from a well with high As content taking in consideration several factors was 16 cm diameter and 80 cm height. Using two columns in series and one of reserve a previous cost analysis showed that the water cost after this treatment was 0.002 and 0.011 US L for free and immobilized biomass respectively. 1 INTRODUCTION Freshwater is a renewable but limited resource. The growing demand of clean and safe water from the population the industry and the agriculture has been taking conscience that the practices of the past which supposed an infinite source of water at low price cannot longer continue. The human activity has affected the quantity and quality of several water bodies in the world. The growing demand had lead many countries to test the best way to make a well use and to preserve the water reservoirs to future uses in the context of a sustainable development Henry 1996 . Groundwater reservoirs are a principal source of fresh water. The world grounds aquifers .
