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Global water crisis can be overcome by desalination

Global water crisis can be overcome by desalination

Amimul Ahsan1,2,*, Monzur Imteaz2

Global water crisis can be overcome by desalination and it grows day by day. The Rancho San Lucas desalination plant produces 360 m3/d. It serves the Rancho San Lucas resort on Mexico’s Baja California coast. It is the first successful design of the multi-stage multi-turbo (MSMT) seawater RO. It was developed by FEDCO, Water Technologies de México (WTM), Hydranautics, and American Water Chemicals (AWC). It achieved 60% recovery [1]. An improved electrodialysis technique can produce about 2,000 L/d of drinking water. The project funded by EU. REvivED water (Fig. 1) is a low-energy consumed and sustainable solution to slake the thirst of people. It provides drinking water to 7 communities in Somaliland, Djibouti, India and Tanzania [2]….

© 2021 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M. Global water crisis can be overcome by desalination. Journal of Desalination and Water Purification 2020;22:1.

To link this article: http://ababilpub.com/download/jdwp22-1/

Effect of contact time of granular activated carbon on salinity and electrical conductivity

Effect of contact time of granular activated carbon on salinity and electrical conductivity

Amimul Ahsan1,2,*, Monzur Imteaz2, Mohammed Riyadh Khaleel3, Ebrahim Hamid Hussein Al-Qadami4, Iqbal Khalaf Erabee5

HIGHLIGHTS

  • Granular activated carbon (GAC) adsorption technique was applied to treat wastewater.
  • Granular activated carbons produced from coconut shell (GACCS) and from palm shell (GACPS) were used.
  • Effects of adsorption contact time of GACCS and GACPS were investigated.
  • The optimum adsorption contact time was 3 h.
  • GACCS is better than the GACPS in removing the salinity and electrical conductivity.

ABSTRACT

Adsorption is very common technique to treat wastewater where the activated carbon can adsorb various compounds from wastewater. The granular activated carbon (GAC) adsorption technique was applied to treat wastewater contaminated with various organic compounds. Two types of adsorbents were used such as granular activated carbon produced from coconut shell (GACCS) and from palm shell (GACPS). A comparison of these two adsorbents was conducted to improve the adsorbents quality. Effects of adsorption contact time of granular activated carbon produced from coconut and palm shells (GACCS and GACPS respectively) on the removal of salinity and electrical conductivity from wastewater were investigated. The optimum adsorption contact time was 3 h. The maximum salinity removal efficiency was 20% using the GACCS and the maximum electrical conductivity removal efficiency was nearly 25% using the GACCS whereas about 7% using the GACPS. The results show that the GACCS is better than the GACPS in removing the salinity and electrical conductivity from wastewater.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M, Khaleel MR, Al-Qadami EHH, Erabee IK. Effect of contact time of granular activated carbon on salinity and electrical conductivity. Journal of Desalination and Water Purification 2020;21:8-10.

To link this article: http://ababilpub.com/download/jdwp21-3/

Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents

Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents

M. Jadhav1,*, M. Kharade2

HIGHLIGHTS

  • The residual dyes from various industries consist of wide varieties of dyes conveyed to natural water.
  • Adsorption is an effective process for the treatment of various dye contaminated effluents.
  • Various agricultural biomass-waste products are cost effective adsorbents in wastewater treatment.
  • pH plays the utmost important role in catalyzing the adsorption process.
  • Orange pill powder shows significant results for both Langmuir and Freundlich Isotherms.

ABSTRACT

The present study investigates the application of natural low cost adsorbents (e.g. orange peel, coconut shell and groundnut shell) for removal of Congo red dye from aqueous solution. The effect of various parameters such as pH, adsorbent dose, dye concentration, stirring rate and contact time on adsorption of Congo red dye was studied. The main aim of this study is to assess the suitability of locally available low cost agri-residue as an adsorbent using batch study mode. Batch study results showed that, with increase in an adsorbent dose, removal efficiency of Congo red dye increases due to increase in available surface sites for adsorption. The Congo red dye adsorption was also affected by pH and other process parameters. pH plays the utmost important role in catalyzing the adsorption process. Orange pill powder shows better result at pH 9, coconut shell powder at pH 7 and groundnut powder at pH 4, for removal of Congo red dye. From optimization study it is seen that orange pill powder shows significant results for both Langmuir and Freundlich Isotherms with R2 values of 0.735 and 0.732 respectively. Coconut shell powder is significant for Freundlich Isotherm (R2 = 0.7445) as well as for Langmuir isotherm (R2 = 0.718). Groundnut shell powder is insignificant for both Langmuir isotherm (R2 = 0.4944) as well as Freundlich Isotherms (R2 = 0.6517). Finally, it is concluded that the orange pills and coconut shell performed better than groundnut shell.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Jadhav M, Kharade M. Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents. Journal of Desalination and Water Purification 2020;21:2-7.

To link this article: http://ababilpub.com/download/jdwp21-2/

Oilfield produced water treatment: A challenge

Oilfield produced water treatment: A challenge

Amimul Ahsan1,2,*, Monzur Imteaz2

The term of oil may be replaced by crude oil or petroleum. It is a mixture of gas, liquid, and sticky, tar-like substances. Many corporations and companies withdraw crude oil from the pockets of oil resources by utilizing drilling wells and rigs. Many researchers studied on oilfield produced water treatment; however, it is a challenge. An integrated technique of activated carbon-bentonite adsorbent with double stages membrane process is suggested to treat oilfield produced water. An internal-loop airlift reactor using electrocoagulation/ flotation technique is recommended for the treatment of oilfield produced water. In fact, oilfield produced water are mostly treated in three stages; e.g. primary, secondary and tertiary processes….

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M. Oilfield produced water treatment: A challenge. Journal of Desalination and Water Purification 2020;21:1.

To link this article: http://ababilpub.com/download/jdwp21-1/