scholarly journals Liquid Membrane Formulation for Removal of Kraft Lignin from Simulated Liquid Waste Solution

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Norasikin Othman ◽  
Ooi Zing Yi ◽  
Norlisa Harruddin
Keyword(s):  
Sodium Bicarbonate ◽  
Liquid Membrane ◽  
Liquid Waste ◽  
Kraft Lignin ◽  
Water Bodies ◽  
Aliquat 336 ◽  
Waste Solution ◽  
Lignin Removal ◽  
Aqueous Waste ◽  
Brownish Black

Extraction of lignin from pulping wastewater as an external biofuel and in specialty chemicals will additionally benefit the chemical and automobile industries. Though lignin is nontoxic, it imparts brownish black colouration to the water bodies can cause environmental problems. Emulsion liquid membrane (ELM) technology is proposed to extract and recover the kraft lignin (KL) compound from the aqueous waste solution. This study investigated on development of a liquid membrane formulation for lignin removal from aqueous waste solution. Several parameters such as types and concentration of carrier, types of diluents and types of stripping agentswere studied. The results showed that the most favorable liquid membrane formulation is using Aliquat 336 as extractant, kerosene as diluents and sodium bicarbonate (NaHCO3) as stripping agent which is almost 93% of lignin was extracted.

scholarly journals Selection of Liquid Membrane Component for Lignosulfonate Removal from Liquid Waste Solution using Emulsion Liquid Membrane Process

2017 ◽  
Vol 14 (1) ◽  
Author(s):  
N. Othman ◽  
Z. Y. Ooi ◽  
N. Harruddin
Keyword(s):  
Liquid Membrane ◽  
Animal Feed ◽  
Liquid Waste ◽  
Batch Process ◽  
Membrane Component ◽  
Waste Solution ◽  
Component Selection ◽  
Naoh Solution ◽  
Brownish Black ◽  
Selection Of

Removal of lignosulfonate from pulping process as an external biofuel and in specialty chemicals is growing such as in production of vanillin, animal feed pellets binder, pesticides, ect. Though lignosulfonate(LS) is nontoxic, it imparts brownish black colour to the water bodies and makes them unsuitable for usage in other processes. Therefore the removal and recovery of LS is needed. This study examined the liquid membrane component selection of lignosulfonate(LS) removal from liquid waste solution using trioctylamine (TOA) as a mobile carrier in batch process using mixer settler. Several parameters have been investigated such as choice of diluents, effect of pH, concentration of carrier, concentration of LS solution, organic to aqueous treat ratio, choice of stripping agent and concentration of stripping agent. The results show that at favorable condition of 0.1M concentration of TOA in kerosene, pH 3 of solution, treat ratio 1:15 and 0.7 M NaOH solution as stripping agent showed that almost 90 percent of lignin was extracted and recovered in receiving phase.

Selective Extraction of Palladium from Simulated Liquid Waste Solution by Emulsion Liquid Membrane Process using D2EHPA as a Mobile Carrier

2014 ◽  
Vol 69 (9) ◽  
Author(s):  
Norasikin Othman ◽  
Norul Fatiha Mohamed Noah ◽  
Norlisa Harruddin ◽  
Nurul Ashida Abdullah ◽  
Siti Khadijah Bachok
Keyword(s):  
Liquid Membrane ◽  
Liquid Waste ◽  
Precious Metals ◽  
Selective Extraction ◽  
Extraction Process ◽  
Extraction Time ◽  
Emulsion Liquid Membrane ◽  
Waste Solution ◽  
Mobile Carrier ◽  
Gold Silver

Liquid semiconductor waste has become a serious problem to the environment due to the toxicity of heavy metals in the wastewater. However the monetary value of precious metals such as gold, silver and palladium has become a great concern nowadays. Therefore this study is investigating the recovery of palladium by emulsion liquid membrane (ELM) process using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as a carrier. The important parameters affecting the extraction of palladium such as concentrations of carrier and stripping agents, extraction time and treat ratio were investigate. This experiment was conducted using a mixer-settler in a batch system. The results showed that more than 90% of palladium was extracted using 0.05M D2EHPA, 0.1 M H2SO4 as a stripping agent, 5 minutes extraction time, and 1:3 treat ratio. However, the study on emulsion stability showed unstable results due to the leakage and swelling occurrence during the extraction process. As a conclusion, the research shows that ELM has the potential to extract palladium from simulated waste solution using D2EHPA as a mobile carrier.

Numerical Prediction Performance of Kraft Lignin Extraction Using Boundary Breakage Model

2015 ◽  
Vol 74 (7) ◽  
Author(s):  
Zing-Yi Ooi ◽  
Norasikin Othman ◽  
Chan Nyuk Yan
Keyword(s):  
Liquid Membrane ◽  
Theoretical Study ◽  
Small Deviation ◽  
Kraft Lignin ◽  
Agitation Speed ◽  
Prediction Performance ◽  
Lignin Removal ◽  
Lignin Extraction ◽  
Long Duration ◽  
Extraction Model

This study predicts the performance of kraft lignin extraction using emulsion liquid membrane (ELM) from pulping wastewater using boundary breakage model. The model was developed based on the previous study with some modifications and assumptions. Therefore, in developing kraft lignin extraction model, it will consider emulsion globule approach and the emulsion swelling and breakage during the ELMs process.  It was found to be numerically stable and reliable in predicting the behavior of kraft lignin extraction using ELM for long duration of time.  MATLAB software was used to predict the performance of ELM on extracting kraft lignin from pulping wastewater based on the model developed. At optimum condition, the simulation prediction result was found to have a small deviation with the experimental data on extraction efficiency.The model was computed with some parameter effects including initial feed concentrations; treat ratio and agitation speed, which demonstrated that the prediction results were in agreement with the theoretical study of ELM. The data instills confidence in the model as a useful prediction model on kraft lignin removal by ELM process in pulping industry. 

Sign in / Sign up

Export Citation Format

Share Document