Removal of chromium from aqueous solutions using a palm kernel shell adsorbent

Hanafiah, Marlia Mohd; Hashim, Nadheer A.; Ahmed, S. T.; Ashraf, Muhammad Aqeel

doi:10.5004/dwt.2018.22639

Cited by 33 publications

(20 citation statements)

References 20 publications

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“…Slabbert [59] characterized and identified five metal complexes formed by iron (Fe +2 ), aluminum (Al +3 ), titanium (Ti), and molybdenum (Mo) ions. The metal complexes increased the charged transfer and enhanced the adsorption and deposition of dissolved heavy metals in water [59,60,61,62,63]. The removal of selected heavy metals from leachate under the obtained optimum experimental conditions (tannin dosage 0.75 g, pH 6, 250 rpm for 15 min followed by 60 rpm for 30 min and settling for 30 min) was investigated, and the results are presented in Table 6.…”

Section: Resultsmentioning

confidence: 99%

Factorial Design and Optimization of Landfill Leachate Treatment Using Tannin-Based Natural Coagulant

et al. 2019

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In this study, tannin-based natural coagulant was used to treat stabilized landfill leachate. Tannin modified with amino group was utilized for the treatment process. Central composite design (CCD) was used to investigate and optimize the effect of tannin dosage and pH on four responses. The treatment efficiency was evaluated based on the removal of four selected (responses) parameters; namely, chemical oxygen demand (COD), color, NH3–N and total suspended solids (TSS). The optimum removal efficiency for COD, TSS, NH3–N and color was obtained using a tannin dosage of 0.73 g at a pH of 6. Moreover, the removal efficiency for selected heavy metals from leachate; namely, iron (Fe2+), zinc (Zn2+), copper (Cu2+), chromium (Cr2+), cadmium (Cd2+), lead (Pb2+), arsenic (As3+), and cobalt (Co2+) was also investigated. The results for removal efficiency for COD, TSS, NH3–N, and color were 53.50%, 60.26%, and 91.39%, respectively. The removal of selected heavy metals from leachate for Fe2+, Zn2+, Cu2+, Cr2+, Cd2+, Pb2+, As3+ and cobalt Co2+ were 89.76%, 94.61%, 94.15%, 89.94%, 17.26%, 93.78%, 86.43% and 84.19%, respectively. The results demonstrate that tannin-based natural coagulant could effectively remove organic compounds and heavy metals from stabilized landfill leachate.

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Section: Resultsmentioning

confidence: 99%

Factorial Design and Optimization of Landfill Leachate Treatment Using Tannin-Based Natural Coagulant

et al. 2019

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“…The continuous rise in the waste generation from the oil palm mills activities has been the source of concern to researcher on the conversion of these huge waste to valuable product [45,46]. This current work has sheds light on several batch adsorption experiments for the removal of COD, ammonia nitrogen, nitrate and phosphorus from sewage that have been carried out using composite POFA as a natural low-cost adsorbent.…”

Section: Resultsmentioning

confidence: 99%

Removal of ammonia nitrogen, nitrate, phosphorus and COD from sewage wastewater using palm oil boiler ash composite adsorbent

Manikam

Halim²,

Hanafiah³

et al. 2019

Desalination and Water Treatment

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Sewage treatments are introduced in the country to protect the health of human and environment. In this study, palm oil fuel ash (POFA) was explored as an adsorbent media for the treatment of a sewage wastewater. The optimum shaking speed, shaking time, pH, and dosage for chemical oxygen demand (COD), ammonia nitrogen, nitrate and phosphorus removal were investigated using the adsorbent media of particle sizes ranging from 2.00 to 3.15 mm. POFA and composite POFA chemical composition and characteristics were then determined. Results indicated that sewage concentrations of COD (63.39 mg L-1), ammonia nitrogen (6.01 mg L-1), nitrate (0.63 mg L-1) and phosphorus (0.43 mg L-1). The optimum conditions for shaking were determined at 200 rpm according to the adsorption of COD, ammonia nitrogen, nitrate and phosphorus by the media. Optimum shaking time of 20 min for ammonia nitrogen, nitrate phosphorus and COD optimum shaking time is 30 min. The optimum pH value for COD, nitrate and phosphorus removal using composite POFA was obtained at pH 6 and for ammonia nitrogen is pH 9. Microstructures of the prepared composite POFA were analyzed using Brunauer-Emmett-Teller, scanning electron microscope, X-ray diffractometer and X-ray fluorescence measurements. These results suggest that composite POFA can be used as a potential effective, low cost and eco-friendly green adsorbent for the removal of COD, ammonia nitrogen, nitrate and phosphorus from sewage wastewater.

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“…Water treatment is essential in ensuring access to a clean water supply [65][66][67][68][69][70][71][72]. The present study evaluated the applicability of the EC method in the removal of salts (TDS, CL, Br and SO 4 2− ) from aqueous environments using aluminum electrodes.…”

Section: Discussionmentioning

confidence: 99%

Treatment of Saline Water Using Electrocoagulation with Combined Electrical Connection of Electrodes

et al. 2019

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Saline water treatment has become increasingly important for drinking water supplies. The aim of this study was to evaluate the ability of the electrocoagulation (EC) process with combined aluminum electrodes in removing various types of salt from water samples collected at Sawa Lake, Al-Muthanna, Iraq. The targeted types of salt include total dissolved solids (TDS), chloride salt (Cl−), bromine (Br−), and sulphate (SO42−). A bench scale consisting of combined EC configurations with static electrodes was employed under combined electrical connections. The effect of the six variables factors, such as applied current density (I), reaction time (RT), pH, temperature (T), stirring speed (Mrpm) and inter electrode distance (IED) were observed to achieve a higher removal of TDS, Cl−, Br− and SO42−. Initial results showed the following optimum operating conditions: I = 2 mA/cm2, RT = 80 min, pH = 8, T = 25 °C, IED = 1 cm and Mrpm = 500. The maximum removal efficiency of TDS, Cl−, Br− and SO42− were 91%, 93%, 92% and 90%, respectively. It can be concluded that the EC method applied in the present study was effective to removing salts from lake water.

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Removal of chromium from aqueous solutions using a palm kernel shell adsorbent

Cited by 33 publications

References 20 publications

Factorial Design and Optimization of Landfill Leachate Treatment Using Tannin-Based Natural Coagulant

Factorial Design and Optimization of Landfill Leachate Treatment Using Tannin-Based Natural Coagulant

Removal of ammonia nitrogen, nitrate, phosphorus and COD from sewage wastewater using palm oil boiler ash composite adsorbent

Treatment of Saline Water Using Electrocoagulation with Combined Electrical Connection of Electrodes

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