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Articles by M. Irshad
Total Records ( 2 ) for M. Irshad
  Hossain K.M. Delowar , Imtiaz Uddin , W.H. Abou EL Hassan , Mst. Farida Perveen , M. Irshad , A.F.M. Saiful Islam and Isao Yoshida
  Groundwater arsenic contamination is one of the most important concerns in Bangladesh. We performed a comparative study of three available groundwater arsenic removal methods used in Bangladesh. Among the three methods, the Three-Pitcher system removed arsenic up to 96% whereas AAN-Filter and NIFSF methods removed arsenic 88 and 84%, respectively. The arsenic removal efficiency and water flow rate decreased significantly after three-month continuous operation in Three-Pitcher and AAN Filter methods and two-month continuous operation for NIFSF method. Calcium concentration was decreased to half by Three-Pitcher and AAN Filter methods but increased substantially in the NIFSF method due to the addition of bleaching powder. Anion concentrations in the filtered water changed in both directions. A significant increased in chloride was found in NIFSF water probably due to the chlorination of bleaching powder. Total Dissolved Solid (TDS) decreased 63 and 58% in Three-Pitcher and AAN Filter methods, respectively and increased 25% in NIFSF method. Considering all of the parameters, Three-Pitcher method was the best, but the others were effective, too. The choice of methods largely depends on the socio-economic conditions of the rural people. Before recommending any method for large-scale use in arsenic removal, further study needs to be done.
  A. Al-Busaidi , T. Yamamoto and M. Irshad
  This investigation was aimed to evaluate the effects of zeolite in conjunction with seawater irrigation on barley (Hordeum vulgare L.) growth and salt composition of soil. A sand dune soil was amended with Ca-type zeolite at the rate of 1 and 5% and the seawater was diluted up to the electrical conductivity of 3 and 16 dS m-1. Present results showed that zeolite application significantly increased water holding capacity of the soil and accumulated more salts. The zeolite mixed soils improved plant growth compared to the un-amended control. Higher saline water significantly suppressed the growth of barley than the water with low salinity. The restricted plant growth due to the effects of specific ion or Na+/Ca2+ imbalance may be ameliorated using Ca-type zeolite. We may conclude that soil amendment with zeolite could alleviate the adverse effects of salts on plants following irrigation with higher saline water.
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