改性凹凸棒对养殖水体中氮磷吸附的研究

摘要水体中氮磷含量的高低有水质密切相关，养殖水体中氮磷含量较高，使得水中藻类植物迅速繁殖生长，打破水体生态平衡。近年来水体营养化问题受到关注，国内很多地区的水体都有不同程度的污染，水体营养化导致水生动物，水体底部植物死亡，水质进一步恶化。在处理水体营养盐的各种办法中，采用吸附剂吸附是一种即简便经济又效果显著的方法。本研究主要采用了700℃热改性凹凸棒对氮磷吸附处理，由于凹凸棒对磷元素的吸附效果非常好，但对氮元素吸附效果一般，所以在其中添加了一定量的沸石。经大量实验表明凹凸棒与沸石比为9:1时，二者混合物对氮磷的吸附效果最好。在竞争离子实验中得出，阳离子对吸附剂的吸附有抑制作用，阴离子中SiO32-和SO42-对吸附剂的吸附作用有很大影响。43305

关键词水体营养化热改性凹凸棒去除氮磷吸附

毕业论文设计说明书外文摘要

Title By modified attapulgite research nitrogenand and Phosphorus adsorption of the water

Abstract

Water level of nitrogen and phosphorus content is closely related to water quality, breeding high nitrogen and phosphorus content in water, making the water algae multiply rapidly growing, breaking the ecological balance of water. In recent years, People were concern of water eutrophication problem , a lot of water areas of the country have different levels of pollution, water eutrophication cause aquatic animals, body of water at the bottom of plant death, further deterioration of water quality. In a variety of ways to deal with the water of nutrients, using an adsorbent that is simple and economical and significant effect of the method. This study uses a 700 ℃ heat modified attapulgite nitrogen and phosphorus adsorption process, due to the adsorption of phosphorus attapulgite very well, but the effect on the adsorption of nitrogen in general, so that adds a certain amount of zeolite. The large number of experiments show that attapulgite and zeolite ratio of 9: 1, a mixture of both nitrogen and phosphorus adsorption effect of the best. Ion competition experiments concluded that the adsorption of cation adsorbent inhibit anions SO42-, SiO32- and adsorption on the adsorbent has a great influence.

Keywords The water eutrophication, thermally treated attapulgite, Removal of nitrogen and phosphorus, adsorb

1 引言.1

1.1.养殖水体营养化背景…….1

1.1.1. 养殖水体营养化的原因和危……1

1.1.2 水体富营养化的防治方法3

1.2 凹凸棒石简介….4

1.2.1凹凸棒石的结构和化学成分…….4

1.2.2 凹凸棒石的基本性能 …..5

1.3研究意义及前景…….6

2 实验7

2.1 实验材料…7

2.1.1 材料的制备.7

2.1.2 热改性凹凸棒和沸石去除氮磷….7 改性凹凸棒对养殖水体中氮磷吸附的研究:http://www.751com.cn/huaxue/lunwen_44078.html