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引用次数: 0
摘要
一些作者尝试用不同的天然和人工材料去除水中过量的氟化物[F-]。本研究的主要目的是利用当地石灰石采用柱法进行除氟。使用从也门拉赫省Wadi Saim矿床和Wadi Nakhleen矿床的国家水泥公司(NCC)获得的石灰岩。x射线光谱分析表明，该石灰石分为高纯石灰石和极高纯石灰石。当地石灰石具有通过磷酸(PA)-当地石灰石碎处理(PACLT)去除氟的能力，处理后的水符合世卫组织关于饮用水中氟化物的准则。除氟和处理水的pH值在3°范围内稳定，从10 mg/L [F-]降至0.20 mg/L, 0.68 mM [PA]。研究结果可能有助于确定当地石灰石是否适合从饮用水中去除氟化物。
A STUDY ON THE DEFLUORIDATION FROM WATER BY USING LOCAL LIMESTONE
Removal of excess fluoride [F-] from the water has been attempted by several authors by using different materials both natural and artificial. The main aim of this study was to the fluoride removal by using the local limestone adopting column method. The use of limestone obtained from the National Company of Cement (NCC) at Wadi Saim deposit and Wadi Nakhleen deposit, in Lahj Governorate, Yemen. X-ray spectroscopy analyses revealed that that limestone are classified as high and very high pure limestone, respectively. Local limestone has fluoride removal abilities by phosphoric acid (PA)- local crushed Limestone treatment (PACLT), with the treated water conforming to WHO guidelines for Fluoride in drinking water. Fluoride removal and pH of treated water attained stability within 3ℎ for defluoridation from 10 mg/L [F-], to 0.20 mg/L with 0.68 mM [PA]. The results may be useful for suitability of local limestone for fluoride removal from drinking water.
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