Calcium sulfate precipitation studies with scale inhibitors for reverse osmosis desalination

Faizur Rahman

doi:10.1016/j.desal.2013.03.027

Calcium sulfate precipitation studies with scale inhibitors for reverse osmosis desalination

Faizur Rahman^*

^*Corresponding author for this work

Interdisciplinary Research Center for Refining and Advanced Chemicals

Research output: Contribution to journal › Article › peer-review

141 Scopus citations

Abstract

This study is focused on precipitation and inhibition studies of calcium sulfate (gypsum) scale in reverse osmosis (RO) desalination plants. The temperature and concentration range encountered in brackish water RO desalination process has been considered in conducting precipitation and inhibition experiments. Initial screening of a number of additives has been carried out. Formation of gypsum scale has been verified by XRD and SEM analysis. Successful additives were evaluated by measuring induction times using conductivity of solutions and their performance was compared with that of blank supersaturated calcium sulfate solution. The induction time of STD100, SHMP, STD101 was found to be 70, 690 and 1200. min respectively at dose level of 10. ppm, whereas a blended formulation FM101 (10. ppm) did not show any precipitation till 3000. min. The SEM micrographs of precipitate collected when FM101 was added as a scale inhibitor with that of a blank solution and other inhibitors indicate that, the formulation FM101 has significantly modified the crystal morphology and is probably responsible for increased induction time. Development and performance evaluation of scale inhibitors for brackish water reverse osmosis desalination plant. Precipitation and inhibition studies of calcium sulfate (gypsum) scale. Characterization of gypsum scale.

Original language	English
Pages (from-to)	79-84
Number of pages	6
Journal	Desalination
Volume	319
DOIs	https://doi.org/10.1016/j.desal.2013.03.027
State	Published - 4 Jun 2013

Bibliographical note

Funding Information:
The author would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM) for funding this work through project No. 08-WT76-04 as part of the National Science, Technology and Innovation Plan. The laboratory facilities provided by Center for Refining & Petrochemicals, Research Institute, KFUPM are also acknowledged.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Additive formulation
Calcium sulfate scaling
RO desalination
Scale inhibitor

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

Access to Document

10.1016/j.desal.2013.03.027

Cite this

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title = "Calcium sulfate precipitation studies with scale inhibitors for reverse osmosis desalination",

abstract = "This study is focused on precipitation and inhibition studies of calcium sulfate (gypsum) scale in reverse osmosis (RO) desalination plants. The temperature and concentration range encountered in brackish water RO desalination process has been considered in conducting precipitation and inhibition experiments. Initial screening of a number of additives has been carried out. Formation of gypsum scale has been verified by XRD and SEM analysis. Successful additives were evaluated by measuring induction times using conductivity of solutions and their performance was compared with that of blank supersaturated calcium sulfate solution. The induction time of STD100, SHMP, STD101 was found to be 70, 690 and 1200. min respectively at dose level of 10. ppm, whereas a blended formulation FM101 (10. ppm) did not show any precipitation till 3000. min. The SEM micrographs of precipitate collected when FM101 was added as a scale inhibitor with that of a blank solution and other inhibitors indicate that, the formulation FM101 has significantly modified the crystal morphology and is probably responsible for increased induction time. Development and performance evaluation of scale inhibitors for brackish water reverse osmosis desalination plant. Precipitation and inhibition studies of calcium sulfate (gypsum) scale. Characterization of gypsum scale.",

keywords = "Additive formulation, Calcium sulfate scaling, RO desalination, Scale inhibitor",

author = "Faizur Rahman",

note = "Funding Information: The author would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science \& Technology Unit at King Fahd University of Petroleum \& Minerals (KFUPM) for funding this work through project No. 08-WT76-04 as part of the National Science, Technology and Innovation Plan. The laboratory facilities provided by Center for Refining \& Petrochemicals, Research Institute, KFUPM are also acknowledged. ",

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AU - Rahman, Faizur

N1 - Funding Information: The author would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM) for funding this work through project No. 08-WT76-04 as part of the National Science, Technology and Innovation Plan. The laboratory facilities provided by Center for Refining & Petrochemicals, Research Institute, KFUPM are also acknowledged.

PY - 2013/6/4

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N2 - This study is focused on precipitation and inhibition studies of calcium sulfate (gypsum) scale in reverse osmosis (RO) desalination plants. The temperature and concentration range encountered in brackish water RO desalination process has been considered in conducting precipitation and inhibition experiments. Initial screening of a number of additives has been carried out. Formation of gypsum scale has been verified by XRD and SEM analysis. Successful additives were evaluated by measuring induction times using conductivity of solutions and their performance was compared with that of blank supersaturated calcium sulfate solution. The induction time of STD100, SHMP, STD101 was found to be 70, 690 and 1200. min respectively at dose level of 10. ppm, whereas a blended formulation FM101 (10. ppm) did not show any precipitation till 3000. min. The SEM micrographs of precipitate collected when FM101 was added as a scale inhibitor with that of a blank solution and other inhibitors indicate that, the formulation FM101 has significantly modified the crystal morphology and is probably responsible for increased induction time. Development and performance evaluation of scale inhibitors for brackish water reverse osmosis desalination plant. Precipitation and inhibition studies of calcium sulfate (gypsum) scale. Characterization of gypsum scale.

AB - This study is focused on precipitation and inhibition studies of calcium sulfate (gypsum) scale in reverse osmosis (RO) desalination plants. The temperature and concentration range encountered in brackish water RO desalination process has been considered in conducting precipitation and inhibition experiments. Initial screening of a number of additives has been carried out. Formation of gypsum scale has been verified by XRD and SEM analysis. Successful additives were evaluated by measuring induction times using conductivity of solutions and their performance was compared with that of blank supersaturated calcium sulfate solution. The induction time of STD100, SHMP, STD101 was found to be 70, 690 and 1200. min respectively at dose level of 10. ppm, whereas a blended formulation FM101 (10. ppm) did not show any precipitation till 3000. min. The SEM micrographs of precipitate collected when FM101 was added as a scale inhibitor with that of a blank solution and other inhibitors indicate that, the formulation FM101 has significantly modified the crystal morphology and is probably responsible for increased induction time. Development and performance evaluation of scale inhibitors for brackish water reverse osmosis desalination plant. Precipitation and inhibition studies of calcium sulfate (gypsum) scale. Characterization of gypsum scale.

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KW - Calcium sulfate scaling

KW - RO desalination

KW - Scale inhibitor

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DO - 10.1016/j.desal.2013.03.027

M3 - Article

AN - SCOPUS:84877131304

SN - 0011-9164

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JO - Desalination

JF - Desalination

ER -

Calcium sulfate precipitation studies with scale inhibitors for reverse osmosis desalination

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

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