A novel chemical oxo-precipitation (COP) process for efficient remediation of boron wastewater at room temperature

Shih, Yu Jen; Liu, Chia Hsun; Lan, Wei; Huang, Yao Hui

doi:10.1016/j.chemosphere.2014.03.121

Cited by 45 publications

(14 citation statements)

References 33 publications

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“…The carbon dioxide absorption in aqueous solution was the main source of carbonate ion that would precipitate as calcium carbonate (CaCO 3 ). The interference of CO 2 in COP process has been verified in previous studies. ,, …”

Section: Resultssupporting

confidence: 65%

“…The peroxolysis of boron dissociates as several perborate species at pH 8–11 and the prominent species include B(OH) 3 OOH – , B(OH) 2 (OO) 2 B(OH) 2 2– , B(OH) 2 (OOH) 2 – , and B(OH) 3 OOB(OH) 3 2– (Figure ). Calcium and barium salts have been proven to be effective in precipitating peroxoborates . However, the excessive dose of barium salt employed could be a great challenge after treatment of boron since Taiwan Environmental Protection Agency regulated the effluent standard of barium ion in industrial streams to be 2 mg/L.…”

Section: Introductionmentioning

confidence: 99%

“…Calcium and barium salts have been proven to be effective in precipitating peroxoborates. 14 However, the excessive dose of barium salt employed could be a great challenge after treatment of boron since Taiwan Environmental Protection Agency regulated the effluent standard of barium ion in industrial streams to be 2 mg/L. In this work, calcium chloride was chosen as the precipitant to avoid the concerns of barium toxicity in aqueous solution.…”

Section: ■ Introductionmentioning

confidence: 99%

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Reclaiming Boron as Calcium Perborate Pellets from Synthetic Wastewater by Integrating Chemical Oxo-Precipitation within a Fluidized-Bed Crystallizer

Lin

Shih

et al. 2018

ACS Sustainable Chem. Eng.

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Chemical oxo-precipitation (COP) is a modified precipitation process in which hydrogen peroxide is used to transform boric acid to perborate anions, which are precipitated with calcium salt under ambient conditions. To minimize the production of sludge, chemical oxo-precipitation was performed in a fluidized-bed reactor to reclaim boron as unseeded calcium perborate pellets. Several major experimental parameters, including effluent pH, calcium dosage, and surface loading that affected the degree of supersaturation and the efficiency of boron removal, were tested. A crystallization ratio of around 60% was attained under the following conditions: initial boron concentration = 1000 ppm, molar ratios of [Ca]/[B] = 0.6 and [H2O2]/[B] = 2, effluent pH = 10.6, bed height = 80 cm, and hydraulic retention time = 18 min. On the basis of the characterization of XRD, SEM, and Raman spectroscopy, the granules recovered were amorphous calcium perborates Ca(B(OH)3OOH)2 and CaB(OH)3OOB(OH)3.

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Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Reclaiming Boron as Calcium Perborate Pellets from Synthetic Wastewater by Integrating Chemical Oxo-Precipitation within a Fluidized-Bed Crystallizer

Lin

Shih

et al. 2018

ACS Sustainable Chem. Eng.

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“…Interestingly, the quaternary samples showed a boron content (atomic ratio $ 65%) much higher than that of the binary samples ($27-38%). Shih et al 26 found that the alkali earth metals (especially barium) are the most efficient precipitants to chemisorb boron species in the aqueous solution in the form of metal perborate (MeB 2 O 4 , B content 66%). On the other hand, alkali earth metals hexaborides (MeB 6 , B content 85.7%) could also be formed, 27 leading to a high B level in the nal products.…”

Section: Resultsmentioning

confidence: 99%

Efficient water oxidation with amorphous transition metal boride catalysts synthesized by chemical reduction of metal nitrate salts at room temperature

et al. 2017

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We present a variety of amorphous transition-metal borides prepared at room temperature by a chemical reduction method as highly active catalysts for the oxygen evolution reaction (OER). The amorphous borides exhibit activities much higher than the corresponding crystalline (spinel, layered double hydroxide and perovskite) metal oxides containing the identical metal compositions, which have already been regarded as promising OER catalysts. The amorphous Ni/Fe borides showed the best mass normalized OER current density of 50 A g À1 at an overpotential of 0.35 V, transcending the performance of the state-of-the-art OER catalyst, RuO 2 . Amorphous transition-metal borides demonstrated extremely high active OER catalytic activity. The outstanding catalytic activity can be attributed to the amorphous structure, the large specific surface areas (above 110 m 2 g À1) and the electron-enriched transition metal sites stemming from boron doping. The stoichiometry of the catalysts can be controlled precisely even for the synthesis of quaternary metal boride catalysts, which made it feasible to further optimize the catalytic activity. These results indicated that it is facile to prepare highly active OER catalysts by the one-step chemical reduction process at room temperature.

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“…A number of technologies have been developed to remove boron from wastewater such as chemical precipitation (Shih et al, 2014), reverse osmosis (Rahmawati et al, 2012), ion exchange (Yilmaz et al, 2005) and ultrafiltration (Yürüm et al, 2013). However, most of these conventional treatments are ineffective for low concentration of metals ions, involve sludge disposal problems and incur high cost to be practised (Mirbagheri & Hosseini, 2005).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Boron Removal From Aqueous Solution via Adsorption Using Composite Beads of Mangrove Bark, Alginate and Zeolite

Mohd¹,

Ismail²

2020

JCEIB

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The presence of boron beyond the allowable limit in water bodies can pose a dangerous risk to all living organisms. In order to increase the adsorption capacities of composite beads of mangrove bark, alginate and zeolite (MAZC) to remove boron from aqueous solution, pretreatment of mangrove bark using sodium hydroxide solutions at a temperature of 60°C was conducted. The surface characterizations of the beads were conducted using Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett Teller (BET) and scanning electron microscope with energy dispersive X-ray spectroscopy (EDX) before and after boron adsorption. The results showed that the BET surface area of MAZC beads increased due to modification of the mangrove bark during pretreatment process. The effects of pH, temperature, adsorbent dosage and contact time on the boron uptake were then evaluated using batch studies. It was found that the maximum adsorption of boron was 83.3% occurred at pH 5, 24 h contact time, 12 g of adsorbent dosage and at a temperature of 27°C. Thermodynamic studies indicated the spontaneous and exothermic nature of adsorption process. Langmuir isotherm model best described the experimental adsorption data with maximum adsorption capacities of 6.964 mg/g. The kinetic data were best described by the pseudo-second order model (R2 = 0.9998). These results indicate that the pretreatment of mangrove bark can optimize the removal of boron from aqueous solution.

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A novel chemical oxo-precipitation (COP) process for efficient remediation of boron wastewater at room temperature

Cited by 45 publications

References 33 publications

Reclaiming Boron as Calcium Perborate Pellets from Synthetic Wastewater by Integrating Chemical Oxo-Precipitation within a Fluidized-Bed Crystallizer

Reclaiming Boron as Calcium Perborate Pellets from Synthetic Wastewater by Integrating Chemical Oxo-Precipitation within a Fluidized-Bed Crystallizer

Efficient water oxidation with amorphous transition metal boride catalysts synthesized by chemical reduction of metal nitrate salts at room temperature

Optimization of Boron Removal From Aqueous Solution via Adsorption Using Composite Beads of Mangrove Bark, Alginate and Zeolite

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