Removal of lead(II) and chromium(VI) ions from synthetic wastewater by the roots of harpagophytum procumbens plant

2020 ◽  
Vol 8 (6) ◽  
pp. 104541
Author(s):  
Ntaote David Shooto
Keyword(s):  
Synthetic Wastewater ◽  
Chromium Vi ◽  
Harpagophytum Procumbens

scholarly journals Phytoremediation of chromium(VI) using Colocasia esculenta in laboratory scale constructed wetlands

2021 ◽  
Vol 6 (1) ◽  
pp. 45-49
Author(s):  
Chan Kar Men ◽  
Rozidaini Mohd Ghazi
Keyword(s):  
Heavy Metals ◽  
Constructed Wetlands ◽  
Water Scarcity ◽  
Colocasia Esculenta ◽  
Laboratory Scale ◽  
Synthetic Wastewater ◽  
Anthropogenic Emission ◽  
Chromium Vi ◽  
Set Up ◽  
Soil And Water

The existing water is becoming polluted nowadays due to high anthropogenic emission of water. The phytoremediation technology is used to treat the contaminated soil and water which containing higher amount of pollutants. The water that contains heavy metals will cause water scarcity and affect on human health when human drink the water. In this study, Colocasia esculenta was chosen for the removal of Cr(VI) in water. The efficiency of C.esculenta in accumulates Cr(VI) in synthetic wastewater was evaluated. The effect of time and concentration of Cr(VI) were identified in this study. Cr(VI) concentration was determined using diphenylcarbazide method (DPC). Experiment were set up in Laboratory Scale Constructed Wetlands with varies the concentration of synthetic wastewater of 1, 2, 5, 10, 50, 500 and 1000 mg/L and was continued for 36 days. The result of removal percentage for the 1, 2, 5 and 10 mg/L reach 100% while for 50, 500 and 1000 mg/L only remove 99.99%, 94.79% and 55.84% respectively. Roots of C.esculenta are able to accumulate Cr(VI) in wastewater which with BCF value was 1.557 mg/L. The BCF value of roots were more than 1, represents the higher accumulation of metal in plant. Therefore, C.esculenta has potential to use in removing Cr(VI) in water.

scholarly journals Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Patience Mapule Thabede ◽  
Ntaote David Shooto ◽  
Thokozani Xaba ◽  
Eliazer Bobby Naidoo
Keyword(s):  
Nigella Sativa ◽  
Freundlich Isotherm ◽  
Synthetic Wastewater ◽  
Batch Adsorption ◽  
Initial Concentration ◽  
X Ray ◽  
Operational Conditions ◽  
First Order ◽  
Chromium Vi ◽  
Ketonic Group

The aim of the present study was to utilise pristine and magnetite-sucrose functionalized Nigella Sativa seeds as the adsorbents for the uptake of chromium(VI) and lead(II) ions from synthetic wastewater. Prestine Nigella Sativa seeds were labelled (PNS) and magnetite-sucrose functionalized Nigella Sativa seeds (FNS). The PNS and FNS composites were characterized by Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The FTIR analysis of both adsorbents revealed the presence of vibrations assigned to 1749 and 1739 cm-1 (-C=O) for ketonic group for both adsorbents. The amide (-NH) peak was observed at 1533 and 1527 cm-1 on FNS and PNS composites, respectively, whilst the carboxyl group (-COOH) were observed at 1408 cm-1 on both adsorbents. The XRD results of FNS and PNS composites showed a combination of spinel structure and y -Fe2O3 phase confirming the formation of iron oxide. The influence of operational conditions such as initial concentration, temperature, pH, and contact time was determined in batch adsorption system. The kinetic data of Cr(VI) and Pb(II) ions on both adsorbents was described by pseudo-first-order (PFO) model which suggested physisorption process. The sorption rate of Cr(VI) ions was quicker, it attained equilibrium in 20 min, and the rate of Pb(II) ions was slow in 90 min. Freundlich isotherm described the mechanism of Pb(II) ions adsorption on PNS and FNS composites. Langmuir best fitted the uptake of Cr(VI) ions on PNS and FNS. The results for both adsorbents showed that the removal uptake of Pb(II) ions increased when the initial concentration was increased; however, Cr(VI) uptake decreased when the initial concentration increased. The adsorption of Cr(VI) and Pb(II) ions on both adsorbents increased with temperature.

scholarly journals Cr(VI) Removal from Wastewater by Using Rice Husk Ash (RHA)

2006 ◽  
Vol 6 (1) ◽  
pp. 53
Author(s):  
M. J. Uddin ◽  
M. M.R. Khan ◽  
M S. Iftekhar ◽  
M A Islam
Keyword(s):  
Rice Husk ◽  
Optimum Parameter ◽  
Rice Husk Ash ◽  
Toxic Metal ◽  
Synthetic Wastewater ◽  
Tannery Effluent ◽  
Freundlich Isotherms ◽  
Chromium Vi ◽  
Langmuir And Freundlich Isotherms ◽  
Equilibrium Data

Rice husk ash (RHA) was studied as a potential adsorbent for Chromium (VI)removal from wastewater. RHA was able to remove effectively and economically toxic metal from synthetic wastewater. Experiments were done on the removal of Cr(VI) from dichromate solution which is a form of chromium in tannery effluent. The amount of Cr(VI) adsorption increased with the decrease in pH. The optimum parameter was = 2.0 evaluated at pH and the dose rate of the adsorbent was 5 kg RHNm3. The equilibrium data fit well in both the Langmuir and Freundlich isotherms. The study showed that 89.29 x 10-3kg Cr(VI) could be removed by 1 Kg of RHA. Since rice husk (RH) is available and cheap in Bangladesh, it can be used easily as an appropriate adsorbent to remove more than 95% Cr(VI) from tannery wastewater.

scholarly journals Transportation of Chromium (VI) to Bombyx mori L. from mulberry Plant (Morus alba L.) grown at soil irrigated with Chromium (VI) containing effluents

2021 ◽  
pp. 36-43
Author(s):  
Majid Ali ◽  
Muhammad Alamgeer ◽  
Mirza Abdul Qayyum ◽  
Khuram Zia ◽  
Muhammad Ashfaq ◽  
...  
Keyword(s):  
Body Weight ◽  
Mortality Rate ◽  
Bombyx Mori ◽  
Synthetic Wastewater ◽  
Chromium Vi ◽  
Irrigate Soil ◽  
Silk Glands ◽  
Bombyx Mori L ◽  
The Impact ◽  
Mulberry Plant

The research was conducted to determine Chromium (VI) toxicity in population Bombyx mori. The synthetic wastewater used to irrigate soil to evaluate the impact of pH (4 to 8) at 100 mg/L and initial Chromium (VI) concentrations (25 mg/L to 300 mg/L) at 5 pH in its bioaccumulation in B. mori foodchain.  By using atomic absorption spectrophotometer (AAS) analysis the amount of Chromium (VI) determined in soil, mulberry plants, B. mori larvae, silk glands and silkworm feces. The results showed that local cobalt pollution can be indicated by using B. mori as a template as its body length, body weight and the mortality rate were found to be strongly related to Chromium (VI) concentration. Higher the Chromium (VI) amount in mulberry leaves causes more toxicity to B. mori population. At 300 mg/L Cr (VI) concentration and pH 4 there was maximum deposition of Chromium (VI) in soil, mulberry plants, B. mori larvae, faeces and silk glands from the synthetic effluent. The maximum deposition was 123.5±0.03 mg/kg, 89.76±.031 mg/kg, 23.31±0.019 mg/kg, 41.32±0.069 mg/kg and 35.67±0.04 mg/kg observed respectively.

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