三峡库区悬移质泥沙对磷污染物的吸附解吸特性

长江流域资源与环境 >> 2007, Vol. 16 >> Issue (1): 31-36.

三峡库区悬移质泥沙对磷污染物的吸附解吸特性

王晓青1|李哲2|吕平毓1*|郭劲松2

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-01-20
通讯作者: 吕平毓

ADSORPTION AND DESORPTION OF PHOSPHORUS ON SUSPENDED PARTICLES IN THE THREE GORGES AREA

WANG Xiaoqing1, LI Zhe2, LV Pingyu1, GUO Jingsong2

Received:1900-01-01 Revised:1900-01-01 Online:2007-01-20

摘要/Abstract

摘要：

就三峡库区悬移质泥沙对磷污染物的吸附解吸特性从野外同步监测和室内试验研究两个方面展开研究。选取长江干流、嘉陵江和乌江共7个监测断面于2002年和2003进行野外同步监测，测试结果表明：水中的悬移质泥沙对水中各种覆存形态的磷污染物浓度具有显著影响，单位重量泥沙对磷的吸附量与水体总泥沙含量、泥沙粒径有密切关系。采集寸滩断面泥沙对磷酸盐吸附解吸特性进行室内试验研究，并根据Langmuir吸附动力学方程对吸附解吸过程进行了拟合，发现吸附速率常数k随着泥沙粒径的增加而呈递增变化，而磷酸盐初始浓度对k值的影响并不明显，同时，磷酸盐解吸量随着泥沙浓度的增加和粒径的增加呈递减变化，k值随着泥沙粒径的增加而呈递增变化，泥沙浓度对k值的影响不明显。

关键词: 悬移质泥沙, 总磷, 磷酸盐, 吸附, 解吸

Abstract:

The adsorption and desorption behavior of phosphorus on particles in the Three Gorges Area was studied by synchronous monitoring and laboratory experiments. Monitoring experiment revealed a close relationship between phosphorus concentration and particle content. Laboratory experiments were carried out in isothermal adsorption equilibrium and kinetics by mixture particles, the size of which was classified by D1≤0.020 mm and D2≤0.008 mm. The isothermal adsorption equilibrium experiments showed that the particle size has great effect on adsorption amount, with the adsorption amount increasing with the decrease of particle size. The data from kinetics experiment fitted by the secondorder kinetics equation showed that the kinetics coefficient was affected by particle size, particle content and phosphate concentration. Under the condition of the same particle content and initial phosphate concentration, the kinetics coefficient was greater on thinner particles. Adsorption and desorption experiments were carried out by using particles from Cuntan crosssection. The adsorption experiment data can well be fitted by Langmuir kinetics equation, with rate coefficient k being greater on the coarser particles, and initial phosphate concentration having no obvious effect on rate coefficient k. The desorption experimental data fitted by Langmuir kinetics equations showed that the phosphate desorption amount decreased with the increase of particle concentration and particle size, and rate coefficient k decreased with the increase of particles size. There was no obvious effect of particle size on coefficient k.

Key words: suspended particles, total phosphorus, phosphate, adsorption, desorption

王晓青,李哲,吕平毓,郭劲松. 三峡库区悬移质泥沙对磷污染物的吸附解吸特性[J]. 长江流域资源与环境, 2007, 16(1): 31-36.

WANG Xiaoqing, LI Zhe, LV Pingyu, GUO Jingsong. ADSORPTION AND DESORPTION OF PHOSPHORUS ON SUSPENDED PARTICLES IN THE THREE GORGES AREA[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2007, 16(1): 31-36.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

推荐阅读 10

[1]	胡学玉, 孙宏发, 陈德林. 铜绿山矿冶废弃地优势植物重金属的积累与迁移[J]. 长江流域资源与环境, 2008, 17(3): 436 .
[2]	陶豫萍,吴宁,罗鹏,刘兵. 森林对污染物（SO2-4）的过滤器效应研究[J]. 长江流域资源与环境, 2005, 14(5): 628 -632 .
[3]	李翀,廖文根,彭静,叶柏生. 宜昌站1900~2004年生态水文特征变化[J]. 长江流域资源与环境, 2007, 16(1): 76 -80 .
[4]	张心怡,刘敏,孟飞. 基于RS和GIS的上海城建用地扩展研究[J]. 长江流域资源与环境, 2006, 15(1): 29 -33 .
[5]	陈静, 杨凯, 张勇, 赵军. 灰色协调度模型在产业用水系统分析中的应用[J]. 长江流域资源与环境, 2008, 17(5): 688 .
[6]	段学花王兆印余国安. 以底栖动物为指示物种对长江流域水生态进行评价[J]. 长江流域资源与环境, 2009, 18(3): 241 -247 .
[7]	戴天晟孙绍荣赵文会顾宝炎. 区域水资源可持续利用评价的FAHP-PP模型[J]. 长江流域资源与环境, 2009, 18(5): 421 .
[8]	胡振鹏, 葛, 刚, 刘成林, 陈伏生, 李, 述. 鄱阳湖湿地植物生态系统结构及湖水位对其影响研究[J]. 长江流域资源与环境, 2010, 19(06): 597 .
[9]	刘毅, 陶勇, 万开元, 张过师, 陈树森, 陈防. 丹江口库区坡耕地柑桔园不同覆盖方式下地表径流氮磷流失特征[J]. 长江流域资源与环境, 2010, 19(11): 1340 .
[10]	肖艳, 黎祖贤, 章新平, 周建君. 近48年来湘江流域极端降水事件特征分析[J]. 长江流域资源与环境, 2010, 19(11): 1356 .