Seawater sulfate removal with nanofiltration

The biological sulfate removal in the acidogenic bioreactor with an ultrafiltration membrane system was investigated at 35°C. Sucrose was used as the sole organic substrate. The sulfate concentration in the substrate ranged from 0 to 600mgS·1−1. The chemostat reactor was operated to compare with the membrane bioreactor. The fouling phenomenon caused by FeS precipitate was observed at higher concentration of sulfate. However, it was possible to continuously operate the membrane bioreactor by cleaning the membrane. The efficiency of sulfate removal by sulfate reduction reached about 100% in the membrane bioreactor, and 55 to 87% of sulfide was removed from the permeate by the membrane filtration. The composition of the metabolite was remarkably changed by the change in sulfate concentration. When the sulfate concentration increased, acetate and 2-proponol significantly increased while n-butyrate and 3-pentanol decreased. The sulfate-reducing bacteria play the role as acetogenic bacteria consuming volatile fatty acids and alcohols as electron donors under sulfate-rich conditions. The results show that the acidogenesis and sulfate reduction simultaneously proceed in the membrane bioreactor.

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Sulfate removal using rubber wood ash to enhance biogas production from sulfate-rich wastewater generated from a concentrated latex factory

Biochemical Engineering Journal ◽

10.1016/j.bej.2021.108084 ◽

2021 ◽

pp. 108084

Author(s):

Marisa Raketh ◽

Rattana Jariyaboon ◽

Prawit Kongjan ◽

Eric Trably ◽

Alissara Reungsang ◽

...

Keyword(s):

Biogas Production ◽

Wood Ash ◽

Rubber Wood ◽

Sulfate Removal

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Sulfate removal from industrial wastewater in a hydroponic system planted with Bidens pilosa L

Physics and Chemistry of the Earth Parts A/B/C ◽

10.1016/j.pce.2021.103023 ◽

2021 ◽

pp. 103023

Author(s):

M.S. Mthembu ◽

F.M. Swalaha ◽

A.K. Basson ◽

S.F. Ndulini ◽

G.T. Mokoena ◽

...

Keyword(s):

Industrial Wastewater ◽

Bidens Pilosa ◽

Hydroponic System ◽

Sulfate Removal

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Optimization of sulfate removal from aqueous media by surfactant-modified layered double hydroxide using response surface methodology

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.124322 ◽

2021 ◽

Vol 262 ◽

pp. 124322

Author(s):

Sousan Besharatlou ◽

Mansoor Anbia ◽

Samira Salehi

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Layered Double Hydroxide ◽

Aqueous Media ◽

Sulfate Removal ◽

Double Hydroxide

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Mechanisms and Remediation Technologies of Sulfate Removal from Acid Mine Drainage

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.3252 ◽

2012 ◽

Vol 610-613 ◽

pp. 3252-3256

Author(s):

Mei Qin Chen ◽

Feng Ji Wu

Keyword(s):

Heavy Metals ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Metal Corrosion ◽

Sulfate Ion ◽

High Concentration ◽

Biological Reduction ◽

Acid Mine ◽

Sulfate Removal ◽

Co Precipitation

Acid mine drainage (AMD) has properties of extreme acidification, quantities of sulfate and elevated levels of soluble heavy metals. It was a widespread environmental problem that caused adverse effects to the qualities of ground water and surface water. In the past decades, most of investigations were focused on the heavy metals as their toxicities for human and animals. As another main constitution of AMD, sulfate ion is nontoxic, yet high concentration of sulfate ion can cause many problems such as soil acidification, metal corrosion and health problems. More attention should be paid on the sulfate ion when people focus on the AMD. In the paper, sulfate removal mechanisms include adsorption, precipitation, co-precipitation and biological reduction were analyzed and summarized. Meanwhile, the remediation technologies, especially the applications of them in China were also presented and discussed.

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A revised seawater sulfate oxygen isotope record for the last 4 Myr

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2015.12.005 ◽

2016 ◽

Vol 175 ◽

pp. 239-251 ◽

Cited By ~ 12

Author(s):

Stefan Markovic ◽

Adina Paytan ◽

Hong Li ◽

Ulrich G. Wortmann

Keyword(s):

Oxygen Isotope ◽

Seawater Sulfate ◽

Oxygen Isotope Record ◽

Isotope Record

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Influence of Selected Coagulants of Indicator and Dioxin-Like PCB Removal from Drinking Water

Ecological Chemistry and Engineering S ◽

10.1515/eces-2017-0004 ◽

2017 ◽

Vol 24 (1) ◽

pp. 41-51

Author(s):

Agata Rosińska

Keyword(s):

Surface Water ◽

Total Concentration ◽

Sulfate Removal ◽

Aluminium Sulfate ◽

Water Composition ◽

Pcb 126 ◽

Reduction Efficiency ◽

Water Rate ◽

Trade Names ◽

Dioxin Like Pcb

Abstract The aim of the research was to compare selected coagulants efficiency in indicator and chosen dioxin-like PCB removal from surface water. As coagulants, there were used aluminium sulfate and 5 hydrolyzed polyaluminium chlorides, with trade names: PAX-XL1, PAX-XL10, PAX-XL19, PAX-XL60, PAX-XL69. For the research, surface water was used, collected from dam reservoir. The water composition was modified with standard mixtures PCB MIX24 and MIX13, in order to obtain concentration of each congener equal to 300 ng/dm3. The PCB MIX24 mixture was composed of indicator congeners solution: 28, 52, 101, 118, 138, 153, and 180, whereas the MIX13 mixture - solution of three dioxin-like PCB 77, PCB 126, and PCB 169. It was demonstrated that the application of aluminium sulfate allowed for reaching better effects for purifying water of PCB, than with the usage of pre-hydrolyzed salts, polyaluminium chlorides. Out of the studied coagulants, the best effects for indicator PCB removal were obtained with the application of aluminium sulfate, total PCB concentration was decreased by 65%. The highest efficiency for indicator congeners removal (90%) was obtained for PCB 138 and 153. After the application of hydrolyzed polyaluminium chlorides PAX-XL1, PAX-XL10 decrease in higher chlorinated PCB concentration was obtained, in the range of 23 to 74%. Selectivity of chosen PCB congener removal, depending on applied coagulant, was demonstrated; with the usage of aluminium sulfate, removal of heptachlorobiphenyl PCB 180 at the level of 34% was obtained, whereas with the application of PAX-XL1 and PAX-XL10 higher reduction efficiency for this congener was obtained, i.e. 83 and 74% respectively. For dioxin-like PCB, after application of aluminium sulfate, total concentration reduction by 74% was obtained, efficiency of this congeners removal amounted to from 54 (PCB 77) up to 72% (PCB 126), similar results were obtained after the usage of PAX-XL1. The lowest PCB removal from water rate was stated for coagulants PAX-XL60 and PAX-XL69.

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