毕业论文--非金属矿物去除污水中氮磷的研究.docVIP

硕士学位论文 非金属矿物去除污水中氮磷的研究 摘 要 随着工业化程度不断加深环境污染问题也越来越严重，水污染问题受到人们所重视，净化处理受污染的水质成为当前的课题。传统的水化处理成本高，综合治理效果本课题针对上述问题，利用天然粘土矿物累托石的吸附性能，储量、价格的特点，旨在为预防和修复水体富营养化开辟一条新的处理途径。对天然非金属矿物累托石、高岭土、伊利石、硅藻土、膨润土、海泡石、沸石（8~20目）、沸石（2~4mm）表明，天然粘土矿物对水体中氮磷虽然有一定去除作用，但效率不高。 经高温煅烧后的累托石，其比表面和均显增大经00℃煅烧过的累托石对氮磷的吸附N、P的吸附容量分别达到μg/g和μg/g，对模拟水样中氮磷的去除率分别为83.56%和91.49%。 体系初始pH、吸附温度、吸附时间等对等摩尔比混合改性累托石氮磷的吸附容量有较大影响。等摩尔比混合改性累托石在酸强度较小的范围内其氮磷吸附容量达到最大；当吸附温度达35℃时，氮磷吸附速率最大，在实验条件下的吸附容量分别为1321.53μg/g 和1108.54μg/g，较高温度均有利于改性累托石对水样中氮磷的吸附；当吸附时间达到130min时，改性累托石对氮磷的吸附均达到饱和。 关键词：累托石，氮吸附，改性， NON-METALLIC MINERAL REMOVAL OF NITROGEN AND PHOSPHORUS IN SEWAGE Author: Yin Zhiwei Instructor: Liu Hengsheng ABSTRACT At present, with the development of Chinas industry, more and more serious problems of environmental problems, such as water pollution, attracting more and more peoples’ attention. The study of purification of contaminated water has become hot topic. However, traditional eutrophication water treatment costs high and ineffective. Focus on solve these problems, in this paper, natural clay of rectorite was used as excellent materials to adsorption N and P. Firstly, the natural non-metallic mineral were used, such as rectorite kaolinite, illite， diatomite bentonite, sepiolite, zeolite (8 to 20 mesh), zeolite (2 ~ 4mm) et.al., there nitrogen and phosphorus adsorption performance were test. The experimental results show that the natural clay minerals can adsorption N, P, but the efficiency is low. Secondly, the article focuses on the natural rectorite modified and modified rectorite adsorption properties, moreover, the mixed modified rectorite adsorption nitrogen, phosphorus influencing factors were sutudied when controlling single factor variable. The experimental results show that, after high temperature calcined rectorite, its specific surface and pore volume were significantly increased, when rectorite calcined at 700 ℃, the material had the best adsorption properties of nitrogen, phosphorus; acid-modified, al