宁夏南部山区苦咸水的净化研究

Purification of Brackish Waters in South Mountain Area in Ningxia

针对宁夏南部山区部分居民仍在饮用苦咸水这一现状,将当地广泛种植的荞麦取其壳经简单处理后用作吸附剂对苦咸水进行净化处理,研究荞麦壳改性前后对水中Hg^(2+)离子、Cr^(6+)离子及溶解性总固体的吸附特性。结果表明,用NaH_2PO4改性的荞麦壳具有较好的吸附效果,不仅吸附速度快,而且对Hg^(2+)离子、Cr^(6+)离子的吸附率分别可达81%和76%,净化后水质达到饮用标准。这一研究为荞麦壳的资源化利用探索了新的途径。

At present,some residents in south mountain area in Ningxia still drink brackish water. The buckwheat shell was used as adsorbent in brackish water purification. It was chemically modified by using Na H2PO4,compared with the raw buckwheat shell,increased its Hg^2＋and Cr^6＋absorption. The buckwheat shell was able to remove 81% and 76%of Hg^2＋and Cr^6＋. The buckwheat shell is a potential high efficient material for removal of brackish water. A new way of buckwheat shell utilization was explored.