Influence of Na+, K+, Mg2+, Ca2+, and Fe3+ on filterability and settleability of drilling sludge

Liyan Liu; Hao Yan; Wei Tan; Guorui Zhu

doi:10.1016/j.cjche.2016.10.008

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Influence of Na⁺, K⁺, Mg²⁺, Ca²⁺, and Fe³⁺ on filterability and settleability of drilling sludge

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Influence of Na⁺, K⁺, Mg²⁺, Ca²⁺, and Fe³⁺ on filterability and settleability of drilling sludge
- Chinese Journal of Chemical Engineering Vol. 25, Issue 5, Pages: 658-664(2017)
- Affiliations：
  
  School of Chemical Engineering and Technology, Tianjin University,Tianjin,China,300350
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.10.008
  CLC：
- Published：2017
- Accepted：
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DOI：

, K DOI： 10.1016/j.cjche.2016.10.008.

摘要

Abstract

Solid-liquid separation is a vital step in drilling sludge disposal

and the filterability and settleability of drilling sludge are the main evaluating indicators for the separation process. The influence of Na

and Fe

on drilling sludge filterability and settleability was investigated in our research. The water content

filtration rate

supernatant volume and supernatant turbidity were measured to evaluate the filterability and settleability of drilling sludge. Meanwhile

the zeta potential

specific surface area of sludge flocs

particle size distribution and Fourier-transformed infrared spectra were employed to clarify the influencing mechanism. The experimental results showed that the filterability and settleability of drilling sludge were related to concentration and types of cations. Mg

and Fe

performed better than Na

and the cations with smaller hydrated radius got superior solid-liquid separation behavior at same valence. Finally

the spectra indicated that no chemi

cal adsorption occurred between inorganic cations and drilling sludge flocs. The variation of surface charge and flocs growth after adding different inorganic cations were the reasons for the changes of the filterability and settleability.

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