scholarly journals Biosorption of Zn(II) in High and Low Strength Synthetic Wastewater by Watermelon Rind (Citrullus lanatus)

2015 ◽  
Vol 773-774 ◽  
pp. 1286-1290 ◽  
Author(s):  
M.F.H. Azizul-Rahman ◽  
A.A. Mohd Suhaimi ◽  
Norzila Othman
Keyword(s):  
Heavy Metal ◽  
Contact Time ◽  
Metal Removal ◽  
Citrullus Lanatus ◽  
Heavy Metal Removal ◽  
High Strength ◽  
Synthetic Wastewater ◽  
Watermelon Rind ◽  
Optimum Ph ◽  
Low Strength

The heavy metal contain in the industrial wastewater can cause a pollution towards the environment and human due to its toxicity. Therefore extensive studies were conducted for the heavy metal removal. This study was conducted under several conditions by varying pH, biosorbent dosage, initial wastewater concentration and contact time. The results revealed that optimum pH, for high strength synthetic wastewater was 8.0 meanwhile for low strength synthetic wastewater was 7.0. Both high and low strength synthetic wastewater was optimum at 30 minutes of contact time with 1.5g and 0.02g of bisorbent dosage respectively. Meanwhile, the optimum initial metal concentration for high and low strength synthetic wastewater was 400ppm and 1ppm respectively. The results had proven that watermelon rind is able to treat wastewater with high and low concentration of metal.

Biosorption of Pb(II) and Zn(II) in Synthetic Waste Water by Watermelon Rind (Citrullus lanatus)

2013 ◽  
Vol 465-466 ◽  
pp. 906-910 ◽  
Author(s):  
M.F.H Azizul-Rahman ◽  
A.A. Mohd-Suhaimi ◽  
Norzila Othman
Keyword(s):  
Waste Water ◽  
Water Pollution ◽  
Heavy Metal ◽  
Contact Time ◽  
Citrullus Lanatus ◽  
Absorption Spectrometry ◽  
Physical Chemical ◽  
Lead And Zinc ◽  
Watermelon Rind ◽  
Optimum Ph

Water pollution by heavy metal is great concern due to its toxicity to nature and environment. Extensive studies were carried out to remove heavy metal through physical, chemical and biological approaches. One of the biological approaches is biosorption. This study was conducted under several conditions namely pH, biosorbent dosage, initial wastewater concentration and contact time. Final concentrations of metals were tested using Atomic Absorption Spectrometry (AAS). The results revealed that optimum removal for Lead and Zinc was 77.3% and 90.30%. Optimum pH, for Lead was 6.0 whereas Zinc was 7.0 respectively. Both metals have showed the same optimum biosorbent dosage of 0.02g and 30 minutes of contact times. Meanwhile, the optimum initial metal concentration for Lead and Zinc were 5 ppm and 1ppm. It is proven that watermelon rind is able to treat wastewater with the present of Lead and Zinc.

Adsorption studies on heavy metal removal from synthetic wastewater by pyrolyzed chicken feather fiber

2017 ◽  
Vol 62 ◽  
pp. 307-315
Author(s):  
Wei Chek Moon ◽  
Puganeshwary Palaniandy ◽  
Mohd Suffian Yusoff ◽  
Irvan Dahlan
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Synthetic Wastewater ◽  
Chicken Feather ◽  
Adsorption Studies ◽  
Feather Fiber ◽  
Chicken Feather Fiber

scholarly journals Utilization of Banana (Musa sapientum) Peel for Removal of Pb2+ from Aqueous Solution

2021 ◽  
Vol 1 (2) ◽  
pp. 117-128
Author(s):  
Afrida Nurain ◽  
Protima Sarker ◽  
Md. Shiblur Rahaman ◽  
Md. Mostafizur Rahman ◽  
Md. Khabir Uddin
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Adsorption Isotherm ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Agitation Speed ◽  
Banana Peel ◽  
Management Problem ◽  
Freundlich Adsorption Isotherm

Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best fitting (r2 = 0.9978 and 0.9595) for Pb2+ adsorption. The maximum Pb2+ adsorption capacity was 2.1 mg g-1. The findings indicate that the banana peel waste could be a potential adsorbent for heavy metal removal. Moreover, the waste management problem could be solved in an eco-friendly manner by utilizing it for the eradication of Pb2+ from wastewater.

Effect of carbonization on the surface and influence on heavy metal removal by water hyacinth stem-based carbon

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Joseph Nyamoko Tinega ◽  
Charles Mwaura Warui
Keyword(s):  
Heavy Metal ◽  
Pore Size ◽  
Surface Area ◽  
Water Hyacinth ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Metal Adsorption ◽  
Synthetic Wastewater ◽  
Commercial Application ◽  
Content Type

PurposeThe aim of this study is to examine the effect of carbonization on the surface and its influence on heavy metal removal by water hyacinth based carbon.Design/methodology/approachDried water hyacinth stem was used as precursor to prepare carbon based adsorbent by pyrolysis method. The adsorbent proximate (ash, volatile matter and fixed carbon) and elemental (carbon hydrogen nitrogen sulfur) composition, surface area, pore size distribution, surface chemistry was examined and compared.FindingsThe results demonstrated that through carbonization in comparison to dried water hyacinth stem, it increased the surface area (from 58.46 to 328.9 m2/g), pore volume (from 0.01 to 0.07 cc/g), pore size (from 1.44 to 7.557 Å) thus enhancing heavy metal adsorption. The metal adsorption capacity of Cd, Pb and Zn was measured and analyzed through induced coupled plasma-mass spectrometer. At metal concentration of 0.1 mg/l adsorption rate for Cd, Pb and Zn was 99% due to increased large surface area, coupled with large pore size and volume. Furthermore, the adsorbent surface hydroxyl group (OH−) enhanced adsorption of positively charged metal ions through electrostatic forces.Practical implicationsIt is presumed that not only adsorption with synthetic wastewater but real wastewater samples should be examined to ascertain the viability of adsorbent for commercial application.Originality/valueThere are little or scanty data on the effects of carbonization on water hyacinth stem based carbon and subsequent effects on heavy metal removal in effluents.

Adsorption of Copper (II) from Aqueous Solution Using Tea (Camellia sinensis) Leaf Waste

2020 ◽  
Vol 997 ◽  
pp. 113-120
Author(s):  
Hafizah Binti Naihi
Keyword(s):  
Heavy Metal ◽  
Contact Time ◽  
Metal Removal ◽  
Binding Capacity ◽  
Low Cost ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Batch Adsorption ◽  
Biological Origin ◽  
Tea Waste

The extensive use of heavy metals such as copper in various industries has discharged a large amount of the metals into the environment which is toxic at higher concentrations. The use of low-cost agricultural waste of biological origin such as tea waste may be an economic solution to this problem. Tea waste is among the potential material to be developed as an adsorbent for heavy metal ions. Tea waste contains cellulose and lignin which have been reported having an excellent metal binding capacity. This study aims to use tea waste for the removal of Cu2+ ions. The effect of variation in different parameters like initial concentration of Cu2+ ions in solution, adsorbent dosage and contact time were investigated using batch adsorption method. The adsorbent, tea waste was characterized using a compound microscope and FTIR spectroscopy. Experimental results showed that the maximum removal of the copper ion by tea waste at optimum condition (pH 7, 60 min. contact time, 0.8 g adsorbent dose and 0.7 M concentration) is 74%. The adsorbent prepared from tea waste is efficient and it can be conveniently employed as a low-cost alternative in the treatment of wastewater for heavy metal removal.

scholarly journals Indian saffron – Turmeric (Curcuma longa) embedded supermacroporous cryogel discs for heavy metal removal

2019 ◽  
Vol 9 (5) ◽  
pp. 4356-4361 ◽  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Curcuma Longa ◽  
Heavy Metal Removal ◽  
Polymeric Materials ◽  
Synthetic Wastewater ◽  
Binding Property ◽  
Hydroxyethyl Methacrylate

Cryogels are used in a variety of environmental and biotechnological processes. Cryogels are polymeric materials with large pores and open flow channels. Turmeric is a very popular spice, especially in India, which has been shown to contain curcumin alkaloids to treat a variety of many diseases. Playing a protective and therapeutic role against the diseases results from being able to bind to various targets. In this study, Indian saffron (Turmeric) embedded poly(2-hydroxyethyl methacrylate) cryogel discs (Tur-PHEMA/CDs) have been prepared to remove heavy metal ions from waste-water, which is a major environmental problem by utilizing the heavy metal binding property of turmeric. Tur-PHEMA/CDs were used to remove Cu(II), Pb(II), Cd(II) ions. Poly(2-hydroxyethyl methacrylate) cryogel discs (PHEMA/CDs) were also used as control polymer. The prepared cryogels are characterized by multiple experimental tests. The Tur-PHEMA/CDs and PHEMA/CDs with respectively swelling ratio of 83.6% and 71.2% were used in heavy metal ions adsorption studies. pH values of the solution were changed in the range of 3.0-6.0 to determine optimum pH. Maximum adsorption capacities of the Tur-PHEMA/CDs from aqueous solution were 18.36 mg/g for Cu(II), 8.99 mg/g for Pb(II) and 5.76 mg/g for Cd(II). The affinity order of heavy metal ions on mass basis was Cu(II) > Pb(II) > Cd(II) from synthetic wastewater. EDTA solution (0.5 M) was used for desorbing of heavy metal ions.

scholarly journals COCONUT HUSK CHAR BIOSORPTIVITY IN HEAVY METAL DIMINUTION FROM CONTAMINATED SURFACE WATER

2016 ◽  
Vol 21 (4) ◽  
Author(s):  
ADEMOLA AJAYI-BANJI AJAYI-BANJI
Keyword(s):  
Heavy Metal ◽  
Surface Water ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Column Experiment ◽  
Freundlich Isotherm ◽  
Coconut Husk ◽  
Biosorption Mechanism ◽  
Isotherm And Kinetic Models

<span>Applicability of coconut husk char in heavy metal removal was examined in the study. The surface morphology and elemental compositions of the char was investigated with SEM-EDX machine. Heavy metals sorption on 100 g of the char dosage was studied under five different contact times in the column experiment. Isotherm and kinetic models were the probing tools for biosorption mechanism prediction. Results indicated removal efficiency for chromium, cobalt, cadmium, aluminum and arsenic at 60 mins contact time were 72, 80, 86, 89 and 100 % respectively. Contaminate removal depends on metal involved and sorption contact time. Adsorption data are fitted well into Freundlich isotherm model (R2 &gt; 0.92). Pseudo kinetic second order well described the adsorption process, with most R2 values ≥ 0.94. Coconut husk char is an effective biosorbent in sequestration of arsenic, cadmium, aluminum and cobalt in contaminated surface water.</span>

scholarly journals Design Experiments for Biosorption of Lead Ions from Wastewater by Box-Wilson’s Method

2019 ◽  
Vol 26 (2) ◽  
pp. 45-53
Author(s):  
Jaafar Zaki Yahya ◽  
Hussain Majeed Flayeh
Keyword(s):  
Heavy Metal ◽  
Metal Concentration ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Pilot Scale ◽  
Response Surfaces ◽  
Agitation Speed ◽  
Lead Ions ◽  
Synthetic Wastewater ◽  
Semiempirical Model

Box-Wilson’s method of design of experiments was used to maximize heavy metal removal from synthetic wastewater. The process of optimization was based on four independent pertinent parameters: agitation speed (150-250) rpm, initial metal concentration (20-40) mg/l, pH (4-8), and biomass dose (2-4) g/l. Lead was chosen as heavy metal. A maximum biosorption was practically attained following thirty runs of different experiments, as given by 24 - Central Composite Design (CCD). The best conditions were initial metal concentration 25.29 mg/l, pH 5.78, biomass dose 3.36 g/l, agitation speed 209.21 rpm. The gained data of experiments were used to form a semiempirical model, based upon a quadratic polynomial, to foretell lead ions biosorption. The model was examined using a statistical software (Design Expert® 11.0) and found adequate. Biosorption response surfaces and contour plots were generated using the developed model, which exposed the existence of high biosorption plateaus whose specifications will be beneficial in monitoring industrial scale or pilot-scale units of future to confirm economic achievability.

scholarly journals Polynomial Regression Analysis for Removal of Heavy Metal Mixtures in Coagulation/Flocculation of Electroplating Wastewater

2020 ◽  
Vol 21 (1) ◽  
pp. 46
Author(s):  
Siti Wahidah Puasa ◽  
Kamariah Noor Ismail ◽  
Muhammad Amarul Aliff Bin Mahadi ◽  
Nur Ain Zainuddin ◽  
Mohd Nazmi Mohd Mukelas
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Polynomial Regression ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Final Concentration ◽  
Operating Conditions ◽  
Synthetic Wastewater ◽  
Metal Mixtures ◽  
Metals Removal

Wastewater produced from the electroplating industry generally consists of heavy metals mixture and organic materials that need to be treated before it can be discharged to the environment. Thus, the present investigation was focused on the selectivity removal of heavy metal mixtures consists of Copper (Cu), Cadmium (Cd), and Zinc (Zn). Several operating conditions, including the effect of pH and coagulant (FeCl3) dosage, were varied to find the best performance of heavy metal removal. Results show the efficiency of heavy metals removal for both wastewater characteristics were approximately 99%. The experimental data on the treatment of synthetic wastewater was plotted using polynomial regression (PR) via Excel software. The value of adjusted R2 obtained for the final concentration of Cu, Zn, and Cd after treatment were 0.6884, 0.9676, and 0.9283, respectively, which shows data were acceptably fitted for Cu and very well fitted for Zn and Cd. The coagulation/flocculation process performed on actual wastewater shows that the lowest final concentration of Cu, Zn, and Cd after treatment were 0.487, 1.232, and 0 mg/L respectively at pH of 12.

scholarly journals COCONUT HUSK CHAR BIOSORPTIVITY IN HEAVY METAL DIMINUTION FROM CONTAMINATED SURFACE WATER

2015 ◽  
Vol 21 (4) ◽  
pp. 7-13
Author(s):  
AJAYI-BANJI ADEMOLA ◽  
SANGODOYIN ABIMBOLA ◽  
IJAOLA OPOLOLA
Keyword(s):  
Heavy Metal ◽  
Surface Water ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Column Experiment ◽  
Freundlich Isotherm ◽  
Coconut Husk ◽  
Biosorption Mechanism ◽  
Isotherm And Kinetic Models

Applicability of coconut husk char in heavy metal removal was examined in the study. The surface morphology and elemental compositions of the char was investigated with SEM-EDX machine. Heavy metals sorption on 100 g of the char dosage was studied under five different contact times in the column experiment. Isotherm and kinetic models were the probing tools for biosorption mechanism prediction. Results indicated removal efficiency for chromium, cobalt, cadmium, aluminum and arsenic at 60 mins contact time were 72, 80, 86, 89 and 100 % respectively. Contaminate removal depends on metal involved and sorption contact time. Adsorption data are fitted well into Freundlich isotherm model (R2 > 0.92). Pseudo kinetic second order well described the adsorption process, with most R2 values ≥ 0.94. Coconut husk char is an effective biosorbent in sequestration of arsenic, cadmium, aluminum and cobalt in contaminated surface water.

Sign in / Sign up

Export Citation Format

Share Document