The effects of pH and suspended solids in the removal of organics from waters and wastewaters by the activated carbon adsorption process

Martin, Rex E.; Iwuco, K.O.

doi:10.1016/0043-1354(82)90055-0

Cited by 20 publications

(3 citation statements)

References 8 publications

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“…Furthermore, BC incorporation into soil might regulate important processes involving organic and inorganic pollutants, such as sorption/desorption. In fact, it is known that the adsorption of a great variety of organics onto soil components is more effective in the acidic or alkaline pH regions rather than in the neutral pH zone (Martin and Iwuco, 1982). The data set obtained for BC samples, particularly BC SP , were very similar to those reported for a BC from pinewood pellets produced at a temperature of 520 °C (Yargicoglu et al, 2015).…”

Section: Basic Characterization and Elemental Analysissupporting

confidence: 65%

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

et al. 2019

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Section: Basic Characterization and Elemental Analysissupporting

confidence: 65%

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

et al. 2019

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“…Such increase of phenol removal efficiency is for the increase of undissociated molecules of phenol under acidic region, which causing the enhancement of adsorption ability of GAC [28]. The electrochemical oxidation of phenol occurs subsequently by bipolar GAC leading to the oxidation rate be more rapid at pH 3.4 than that of pH 10.3.…”

Section: Effect Of Ph On Electrochemical Oxidation Of Phenolmentioning

confidence: 98%

The influence of TiO2 and aeration on the kinetics of electrochemical oxidation of phenol in packed bed reactor

Wang

Zhao

2008

Journal of Hazardous Materials

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“…The surfaces of activated carbon are considered to be negatively charged therefore adsorption capacity is higher at low pH. The increase in the concentration of hydrogen ion concentration in acidic medium neutralizes the negatively charged carbon surface [21]. Turbidity removal and COD removal increases slightly at the alkaline condition due to the breakdown of large molecules thereby facilitating the subsequent adsorption of compounds with low molecular weight.…”

Section: Effect Of Ph On Coagulant and Adsorption Processmentioning

confidence: 99%

Treatment of greywater by adsorption and coagulation with Hibiscus Sabdariffa as the natural coagulant

Ahmad¹,

Ismail²,

Yoon³

2023

J. Phys.: Conf. Ser.

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Greywater refers to wastewater from showers, baths, basins and washing machines. Recycled greywater can be used for crops irrigation, toilet flushing, and other activities that does not require fresh water. Coagulation is an effective, simple, and cheap process to treat greywater with the use of coagulants. The studies show that the use of chemical coagulants pose threat to the environment, produce large amount of sludge and have severe effect on human health. This study uses Hibiscus Sabdariffa seeds as natural coagulant, as they are biodegradable, non-toxic, and safe for human health. The seeds of Hibiscus Sabdariffa are usually discarded, thus using them as natural coagulants makes it cost-effective. Another process of adsorption was also studied in this work due to its effectiveness in treating wastewater. Activated carbon have been studied as an adsorbent due to its low-cost and sustainability. The aims of this paper are to investigate the performance of the seeds and adsorbent by differing pH, coagulant dosage, and adsorbent dosage. Jar test was carried out by varying pH of 2-12, coagulant dosage of 20-120 mg/L and adsorbent dosage of 0.5-5g. The process involved rapid mixing for 4 minutes, slow mixing for 25 minutes and 30 minutes of sedimentation time. By carrying out the experiment, it was found out the seeds of Hibiscus Sabdariffa showed best performance at pH 2, coagulant dosage 20 mg/L with the turbidity removal and COD removal of 91.3% and 43%, respectively. For the process of adsorption, highest turbidity and COD removal were determined to be 98.6% and 61.6% respectively with the pH 2 and adsorbent dosage of 3g. The combined process of adsorption-coagulation shows best performance at pH 2, coagulant dosage 4 mg/L and adsorbent dosage of 1.6g with the turbidity and COD removal of 98.3% and 85% respectively. This study shows the potential in Hibiscus Sabdariffa seeds and activated carbon to treat greywater for reuse.

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The effects of pH and suspended solids in the removal of organics from waters and wastewaters by the activated carbon adsorption process

Cited by 20 publications

References 8 publications

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications

The influence of TiO2 and aeration on the kinetics of electrochemical oxidation of phenol in packed bed reactor

Treatment of greywater by adsorption and coagulation with Hibiscus Sabdariffa as the natural coagulant

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