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Assessment of the irrigation feasibility of low-cost filtered municipal wastewater for red amaranth(Amaranthus tricolor L ***)

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International Soil and Water Conservation Research 2015年第3期3卷 239-252页

作者： Gokul Chandra Biswas Animesh Sarkar Md HRashid Monirul Hassan Shohan Mirajul Islam Qingyue Wang Department of Genetic Engineering and Biotechnology School of Life SciencesShahjalal University of Science and TechnologySylhet 3114Bangladesh Department of Food Engineering and Tea Technology School of Applied Sciences and TechnologyShahjalal University of Science and TechnologySylhet 3114Bangladesh Department of Statistics School of Physical SciencesShahjalal University of Science and TechnologySylhet 3114Bangladesh Department of Environmental Science and Technology Saitama University255 Shimo-OkuboSakura-kuSaitama 338-8570Japan

Because of the scarcity of clean water,treated wastewater potentially provides an alternative source for *** the present experiment,the feasibility of using low-cost filtered municipal wastewater in the irrigation of red amaranth(Amaranthus tricolor L ***)cultivation was *** collected municipal wastewater from fish markets,hospitals,clinics,sewage,and kitchens of households in Sylhet City,Bangladesh were mixed and filtered with nylon *** filtration methods were applied using the following materials:sand(T_(1));sand and wood charcoal consecutively(T_(2));sand,wood charcoal and rice husks consecutively(T_(3));sand,wood charcoal,rice husks and sawdust consecutively(T_(4));sand,wood charcoal,rice husks,sawdust and brick chips consecutively(T_(5));and sand,wood charcoal,rice husks,sawdust,brick chips and gravel consecutively(T_(6)).The water from ponds and rivers was considered as the control treatment(T_(o)).The chemical properties and heavy metals content of the water were determined before and after the low cost filtering,and the effects of the wastewater on seed germination,plant growth and the accumulation rate of heavy metals by plants were *** filtration,the pH,EC and TDS ranged from 5.87 to 9.17,292 to 691 μS cm^(-1) and 267 to 729 mg L^(-1),*** EC and TDS were in an acceptable level for use in irrigation,satisfying the recommendations of the ***,select pH values were unsuitable for *** metal concentrations decreased after applying each *** reduction of Fe,Mn,Pb,Cu,As and Zn were 73.23%,92.69%,45.51%,69.57%,75.47%and 95.06%,*** we considered the individual filtering material,the maximum amount of As and Pb was absorbed by sawdust;Cu and Zn by wood charcoal;Mn and Cu by sand and Fe by *** the six filtration treatments,T_(5) showed the highest seed germination(67.14%),similar to the control T0(77.14%).The healthy plants/pot ratio(93.62%)was significantly higher

关键词： Heavy metals Irrigation feasibility low cost filtration Municipal wastewater Red amaranth

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