干旱区生态环境知识资源中心(Arid): 黄河入河沙漠颗粒物对磷酸盐的吸附特征

Arid

	黄河入河沙漠颗粒物对磷酸盐的吸附特征
其他题名	Phosphate Adsorption Characteristics on the Desert Particulates of Inflow Yellow River
	杨宏伟; 郭博书; 邰朝鲁门; 牧仁; 斯琴高娃; 吕卫华
来源期刊	环境科学
ISSN	0250-3301
出版年	2010
卷号	31 期号:8 页码:1890-1896
中文摘要	研究了黄河入河沙漠颗粒物在天然水(河水和海水)中对磷酸盐的吸附行为, 用改进的Langmuir和Freundlich等温吸附模型对实验数据进行了拟合.结果表明, ①改进的Langmuir等温吸附模型更适用于描述黄河入河沙漠颗粒物对磷酸盐的吸附特征, 其物理意义更明确, 得到的拟合参数更合理;②颗粒物对磷的最大吸附容量Q_(max)变化范围为41.322~357.143 mg·kg~(-1), 其中居延海颗粒物Y2的Q_(max)最大.Q_(max)与颗粒物(Y1~Y5)的有机质有着极显著的正相关关系;③除巴丹吉林沙漠颗粒物Y1外, 颗粒物的临界磷平衡浓度EPC_0值均大于其相应水体的磷浓度.Y1在黄河水中吸附磷的EPC_0小于相应水体的磷浓度0.010<0.053 mg·L~(-1), 而在渤海海水中却大于相应水体的磷浓度0.109>0.074 mg·L~(-1), 表明Y1吸附了黄河水中的磷, 进入渤海后Y1原有吸附可交换态磷NAP转移到海水中.其它颗粒物与相应水体进行磷交换的过程中存在着解吸磷的现象, 具有向相应水体释放磷的能力;④黄河入河沙漠颗粒物对磷酸盐的吸附等温线是过溶液浓度轴0.00的交叉型等温线, 这种新型交叉型吸附-解吸模型较好地解释了其吸附特征和天然粒子的双重性作用
英文摘要	Adsorption behaviors of phosphate on the desert particulates of inflow Yellow River were investigated in natural water(river water and sea water)and the experimental data was fitted by both the improved Langmuir and Freundlich isotherm adsorption models. The results show that①With more clear physical meaning and more reasonable fitting parameters, the improved Langmuir isotherm adsorption model is much better for describing phosphate adsorption on the desert particulates than the improved Freundlich isotherm adsorption model;②The maximum phosphorus(P)adsorption capacity Q_(max) is in the range of 41.322-357.143 mg·kg~(-1), which is the biggest in Y2(Juyanhai Lake particulates). There is remarkable positive correlation between Q_(max) and organic matter of the particulates(Y1-Y5);③Except for Y1(Badain Jaran Desert particulates), the EPC_0 (zero equilibrium P concentration)of the particulates are higher than the concentration of P in corresponding water. The EPC_0 of P adsorption on Y1 in Yellow River is lower than P concentration in corresponding water(0.010 mg·L~(-1)<0.053 mg·L~(-1)), while the EPC_0 of P adsorption on Y1 in Bohai Sea water is higher than the P concentration in their corresponding water(0.109 mg·L~(-1)>0.074 mg·L~(-1)), which shows that Y1 adsorbs P from the water of the Yellow River, then it releases its NAP(native adsorbed exchangeable phosphorus)into Bohai Seawater. However, in the process of the P exchange between other desert particulates and their corresponding water, only desorption phenomenon were observed, which means all other desert particulates release P to their corresponding water;④The adsorption isotherms of phosphate on the desert particulates of inflow Yellow River are cross-axis-type with over 0.00, a new cross-axis-type adsorptiondesorption model, which provide a better explanation for adsorption characteristics of P and for the dual role of natural particulates
中文关键词	黄河 ; 沙漠颗粒物 ; 磷 ; 吸附
英文关键词	EPC_0 Yellow River desert particulate phosphorus adsorption EPC_0
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3965067
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225316
作者单位	内蒙古师范大学化学与环境科学学院, 呼和浩特, 内蒙古 010022, 中国
推荐引用方式 GB/T 7714	杨宏伟,郭博书,邰朝鲁门,等. 黄河入河沙漠颗粒物对磷酸盐的吸附特征[J],2010,31(8):1890-1896.
APA	杨宏伟,郭博书,邰朝鲁门,牧仁,斯琴高娃,&吕卫华.(2010).黄河入河沙漠颗粒物对磷酸盐的吸附特征.环境科学,31(8),1890-1896.
MLA	杨宏伟,et al."黄河入河沙漠颗粒物对磷酸盐的吸附特征".环境科学 31.8(2010):1890-1896.