EFFECTS OF COAL-FIRED THERMAL POWER-PLANT DISCHARGES ON AGRICULTURAL SOIL AND CROP PLANTS
EFFECTS OF COAL-FIRED THERMAL POWER-PLANT DISCHARGES ON AGRICULTURAL SOIL AND CROP PLANTS
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DOI：
10.1016/s0013-9351(86)80065-2
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发表时间：
1986-04-01
影响因子：
8.3
通讯作者：
KHAN, MA
中科院分区：
文献类型：
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作者：
AJMAL, M;KHAN, MA
上游和下游的沃茨从上恒河[印度]运河，排放的冷却塔水，机器洗涤，洗涤器和底灰流出物的530兆瓦Kasimpur燃煤热电厂的物理化学性质已被确定，其直接影响肥沃的土壤和间接豌豆（豌豆）和小麦（小麦）作物也进行了研究。流出物被发现是碱性的。发现洗涤器和底灰流出物含有大量固体，并且具有高的生化和化学需氧量。所有的流出物都被发现是改变土壤化学成分的原因。土壤灌溉与不同的污水表现出增加pH值，有机质，碳酸钙，水溶性盐，阳离子交换容量，电导率，氮和磷含量，而钾含量下降，可能是由于被淋溶到土壤的下层。100，50，和0%（自来水控制）稀释的冷却塔，机洗，洗涤器和底灰废水对豌豆和小麦作物的发芽和生长的影响进行了监测。使用未稀释的流出物，当用冷却塔流出物进行灌溉时，两种作物都有100%的发芽。发芽被限制在90%的两种作物时，灌溉机洗污水，和80和70%的豌豆和小麦，分别与洗涤器和底灰污水灌溉。上游和下游运河水的样本也被用于灌溉有和没有作物的土壤，以确定废水对运河水的影响及其对作物的后续影响。下游渠水灌溉的土壤中发现含有更多的碳酸钙，磷，氨氮比那些接受上游渠水。虽然在两种情况下都获得了100%的发芽率，但发现用下游渠水灌溉的植物的生长略有减少。
The physicochemical properties of the upstream and downstream waters from the Upper Ganga [India] canal, discharged cooling tower water, machine washings, and scrubber and bottom ash effluents of a 530 MW Kasimpur coal-fired thermal power plant have been determined, and their effects directly on fertile soil and indirectly on pea (Pisum sativam) and wheat (Triticum aestivum) crops have also been studied. The effluents were found to be alkaline in nature. The scrubber and bottom ash effluent was found to contain large amounts of solids and had high biochemical and chemical oxygen demands. All the effluents were found to be responsible for altering the chemical composition of the soil. The soils irrigated with the different effluents exhibited an increase in pH, organic matter, calcium carbonate, water-soluble salts, cation exchange capacity, electrical conductivity, and nitrogen and phosphorus contents while potassium content decreased, probably due to being leached to the lower layers of the soil. The effects of 100, 50, and 0% (tap water control) dilutions of cooling tower, machine washings, and scrubber and bottom ash effluents on the germination and growth of pea and wheat crops were also monitored. Using the undiluted effluents, there was 100% germination for both the crops when the irrigation was done with cooling tower effluent. The germination was restricted to 90% for the two crops when irrigated with machine washings effluent, and to 80 and 70% for pea and wheat, respectively, when irrigated with scrubber and bottom ash effluent. The samples of upstream and downstream canal water were also used for irrigating soils with and without crop plants in order to ascertain the impact of the effluents on the canal water and its subsequent effect on the crops. The soils irrigated with downstream canal water were found to contain slightly more calcium carbonate, phosphorus, and ammonia-nitrogen than those receiving upstream canal water. Though 100% germination was obtained in both the cases, the growth of the plants irrigated with the downstream canal water was found to be slightly reduced.