内蒙古石油化工
內矇古石油化工
내몽고석유화공
INNER MONGULIA PETROCHEMICAL INDUSTRY
2011年
14期
1-4
,共4页
黄河%表层沉积物%磷酸盐%吸附等温线%pH
黃河%錶層沉積物%燐痠鹽%吸附等溫線%pH
황하%표층침적물%린산염%흡부등온선%pH
the Yellow River%Sediments%phosphate%Sorption isotherms%pH
研究了黄河上游10个不同表层沉积物在不同pH下对磷酸盐（P）的吸附动力学和吸附热力学的影响,并分别采用了不同的等温吸附模型对实验数据进行了拟合,比较了各自的适用性。结果表明：1沉积物对P的吸附量随时间增长而增大,在48h基本达到吸附平衡,不同沉积物具有相同变化趋势,但吸附能力有明显差异。2不同沉积物在不同pH值下对P的等温吸附具有相同的线性变化趋势,但吸附容量随沉积物不同而异,其中8个沉积物对P的吸附量在接近中性时最大,随pH值增大或减小均表现为下降,且变化幅度均随沉积物不同而异;而其余两样品的吸附量在pH为9.0时最大,pH为6.0时最小。3不同pH条件下,沉积物对P的吸附行为很好地符合线性方程和Freundlich模型,同时对Lang-muir模型也具有较好地拟合效果。
研究瞭黃河上遊10箇不同錶層沉積物在不同pH下對燐痠鹽（P）的吸附動力學和吸附熱力學的影響,併分彆採用瞭不同的等溫吸附模型對實驗數據進行瞭擬閤,比較瞭各自的適用性。結果錶明：1沉積物對P的吸附量隨時間增長而增大,在48h基本達到吸附平衡,不同沉積物具有相同變化趨勢,但吸附能力有明顯差異。2不同沉積物在不同pH值下對P的等溫吸附具有相同的線性變化趨勢,但吸附容量隨沉積物不同而異,其中8箇沉積物對P的吸附量在接近中性時最大,隨pH值增大或減小均錶現為下降,且變化幅度均隨沉積物不同而異;而其餘兩樣品的吸附量在pH為9.0時最大,pH為6.0時最小。3不同pH條件下,沉積物對P的吸附行為很好地符閤線性方程和Freundlich模型,同時對Lang-muir模型也具有較好地擬閤效果。
연구료황하상유10개불동표층침적물재불동pH하대린산염（P）적흡부동역학화흡부열역학적영향,병분별채용료불동적등온흡부모형대실험수거진행료의합,비교료각자적괄용성。결과표명：1침적물대P적흡부량수시간증장이증대,재48h기본체도흡부평형,불동침적물구유상동변화추세,단흡부능력유명현차이。2불동침적물재불동pH치하대P적등온흡부구유상동적선성변화추세,단흡부용량수침적물불동이이,기중8개침적물대P적흡부량재접근중성시최대,수pH치증대혹감소균표현위하강,차변화폭도균수침적물불동이이;이기여량양품적흡부량재pH위9.0시최대,pH위6.0시최소。3불동pH조건하,침적물대P적흡부행위흔호지부합선성방정화Freundlich모형,동시대Lang-muir모형야구유교호지의합효과。
The influence on adsorption kinetics and adsorption thermodynamics of phosphate onto ten different sediments from the Upper Reaches of the Yellow River in different pH values were studied,and different fitting equations were adopted to describe the sorption isotherms,then their applicabilities were analyzed and compared.The results indicates：（1）The amount of phosphate adsorption onto sediments increased with time pass,then 48h attached balance,the various sediments had the same tendency,but there were obvious differences.（2）The sorption isotherms of phosphate onto different sediments in different pH had the same trend and accorded with linear equation,but the absorption amount of phosphate existed certain divergence for different sediments.It was biggest near neutral condition in eight different sediments,and was descended in acid and alkaline conditions,the biggest value and descending extent all changed with the difference of sediments;but the biggest one of the rest was at pH=9.0 and the least one was at pH=6.0.（3）In different pH,the linear equation and linear fitting of Freundlich model were better applied to describe the sorption isotherms,and the applicability of Langmuir equation also had good simulated effect.
