Adsorption behavior of carboxymethyl guar gum onto quartz sand,New Journal of Chemistry

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Adsorption behavior of carboxymethyl guar gum onto quartz sand
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-08-29 00:00:00 , DOI: 10.1039/c8nj02516a
Zichen Yin _{1,

2,

3,

4} , Yanling Wang _{1,

2,

3,

4} , Yijin Zeng _{4,

5}

Affiliation

Carboxymethyl guar gum (CGG) is a kind of guar gum commonly used in oil fields. A simple method for the determination of the concentration of CGG was proposed. The adsorption capacity of CGG on quartz sand was measured and the maximum adsorption amount of CGG on quartz sand was 4.8 mg g⁻¹ with a 0.5 wt% CGG concentration. X-ray diffraction and scanning electron microscopy results proved that CGG was adsorbed on the surface of the quartz sand, namely by surface adsorption. The Fourier infrared spectroscopy confirmed that the adsorption was conducted via physisorption. The adsorption isotherm fitted with the Langmuir adsorption isotherm well, which indicated that the adsorption was a monolayer adsorption. In summary, the adsorption behavior of CGG on quartz sand is by surface adsorption, physical adsorption and monolayer adsorption. In order to obtain the optimal condition to reduce the adsorption of CGG in formation, the influence factors including pH, temperature, inorganic salt, alcohols and polymers were investigated. The results showed that a decline of the adsorption can be achieved under the conditions of higher pH, higher temperature, and the presence of monovalent cation salts, ethylene glycol and polymers.

中文翻译：

羧甲基瓜尔胶在石英砂上的吸附行为

羧甲基瓜尔胶（CGG）是一种常用于油田的瓜尔胶。提出了一种测定CGG浓度的简单方法。测定CGG在石英砂上的吸附容量，在0.5重量％的CGG浓度下，CGG在石英砂上的最大吸附量为4.8mg g ^-1。X射线衍射和扫描电子显微镜结果证明，CGG被吸附在石英砂的表面上，即通过表面吸附。傅立叶红外光谱证实吸附是通过物理吸附。吸附等温线与Langmuir吸附等温线吻合得很好，表明吸附是单层吸附。总之，CGG在石英砂上的吸附行为是通过表面吸附，物理吸附和单层吸附。为了获得减少CGG在地层中吸附的最佳条件，研究了pH，温度，无机盐，醇类和聚合物等影响因素。结果表明，在较高的pH，较高的温度以及存在一价阳离子盐，乙二醇和聚合物的条件下，吸附量可以降低。

更新日期：2018-08-29

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