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水葫芦又叫风眼兰,雨久花科多年生草本水生植物。江南水乡的池塘、湖面、缓流水域都是它安营下寨的好地方。正常情况下,一亩水面一年可收割鲜草2.5—5万公斤,最高可达10万公斤。水葫芦是宝草,能净水,能养畜,又是农田的好肥料,也是制造沼气的好原料。净化污水的能手在多年生水草中,水葫芦有净水“能手”和“吸毒草”之称。据测定,每公斤水葫芦24小时,可以从排放污水中吸收12毫克的酚、15毫克汞,17.6毫克铅、50毫克镍、54毫克锶、56毫克铀、66毫克镉。按照一亩水面一年生产水葫芦2.5万公斤计算,半年就可以从水中吸收酚、汞、铅等毒害性物质10.8—150公斤。另据报道,一亩水葫芦4天就能从废矿水中吸收75克银;一公顷水葫芦一年可以吸收净化污水中4吨氮和一吨磷。水葫芦虽吸收了大量
Water hyacinth, also known as wind orchid, rain long branch of perennial herb aquatic plants. The ponds, lakes and slow-flowing waters of the Jiangnan Water Village are good places for it to settle down under the Walled City. Under normal circumstances, a mu of fresh water a year can harvest 25,000 to 50,000 kg, up to 100,000 kg. Water hyacinth is Po grass, can water, can raise livestock, but also a good fertilizer for farmland, but also a good raw material for biogas production. Experts in the purification of sewage In perennial aquatic plants, water hyacinth water purification “experts” and “drug abuse grass,” said. It has been determined that 12 kg of phenol, 15 mg of mercury, 17.6 mg of lead, 50 mg of nickel, 54 mg of strontium, 56 mg of uranium and 66 mg of cadmium can be absorbed per 12 kg of water hyacinth per kilogram of water hyacinth 24 hours. Calculated in accordance with an annual output of 25,000 kg of water hyacinths per mu of surface water, 10.8-150 kg of poisonous substances such as phenol, mercury and lead can be absorbed from the water within six months. It is also reported that one acre of water hyacinth can absorb 75 grams of silver from the waste mineral water in four days; one hectare of water hyacinth can absorb 4 tons of nitrogen and one ton of phosphorus in the purified sewage in one year. Although water hyacinth absorbed a lot