scholarly journals DETERMINATION OF pH EFFECT AND CAPACITY OF HEAVY METALS ADSORPTION BY WATER HYACINTH (Eichhornia crassipes) BIOMASS

2010 ◽  
Vol 6 (1) ◽  
pp. 56-60
Author(s):  
Anis Shofiyani ◽  
Gusrizal Gusrizal
Keyword(s):  
Heavy Metal ◽  
Water Hyacinth ◽  
Heavy Metal Ions ◽  
Eichhornia Crassipes ◽  
Ph Effect ◽  
Isotherm Model ◽  
Adsorption Capacities ◽  
Adsorption Data ◽  
Langmuir Isotherm Model

Effect of pH and determination of adsorption capacity of Cu(II), Ni(II) and Pb(II) heavy metal ions on adsorbent prepared from Eichhornia crassipes (eceng gondok) biomass has been investigated. The influence of media acidity on the adsorption characteristics was carried out by determining ions adsorbed at various pH in the range of 2-10, while an adsorption isotherm model of Langmuir was used to estimate the capacity of adsorption. Results showed that Cu(II) was optimally adsorbed at the range pH of 5-6, Ni(II) at 2-4, while Pb(II) reached an optimum adsorption at pH 2-3. The adsorption data of Cu(II), Ni(II) and Pb(II) for the adsorbent folowed quite well Langmuir isotherm model, confirmed that such chemisorptions involved on that process. The ions adsorption capacities (am) were 27.47, 16.69, and 15.04 mg/g for Pb(II), Cu(II), and Ni(II), respectively.   Keywords: adsorption, heavy metal, Eichhornia crassipes, pH, capacity

Adsorption of Pb2+, Cu2+ and Cr3+ on Yongnian Bentonite

2014 ◽  
Vol 1056 ◽  
pp. 16-19
Author(s):  
Shu Li Ding ◽  
Dan Dan Hou ◽  
Bo Hui Xu ◽  
Yu Zhuang Sun
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Constant Temperature ◽  
Langmuir Isotherm ◽  
Heavy Metal Ions ◽  
Adsorption Process ◽  
Isotherm Model ◽  
Adsorption Characteristics ◽  
Adsorption Capacities ◽  
Langmuir Isotherm Model

The Bentonite from Yongnian is Ca-Bentonite, Montmorillonite Content 52%, Colloidal Value 57ml/15g, Eca2+/CEC 53.60%. the Adsorption Characteristics of Pb2+, Cu2+ and Cr3+ onto Bentonite under Conditions of Constant Temperature and Ph have been Studied. the Results Show that the Adsorption Capacities of Heavy Metal Ions onto Bentonite from Yongnian Follow the Order of Pb2+> Cu2+> Cr3+. it is Found that the Adsorption Process of Bentonite Accords with the Langmuir Isotherm Model. the Maximum Adsorption of 3 Kinds of Metal Ions onto Bentonite is in Order of Cr3+>Cu2+>Pb2+.

Acrylic acid-chitosan blend hydrogel: a novel polymer adsorbent for adsorption of lead(II) and copper(II) ions from wastewater

2019 ◽  
Vol 39 (10) ◽  
pp. 883-891 ◽  
Author(s):  
Makid Maskawat Marjub ◽  
Nazia Rahman ◽  
Nirmal Chandra Dafader ◽  
Fahima Sultana Tuhen ◽  
Shahnaz Sultana ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Acrylic Acid ◽  
Langmuir Isotherm ◽  
Metal Ion ◽  
Heavy Metal Contamination ◽  
Isotherm Model ◽  
Infrared Analysis ◽  
Maximum Adsorption Capacity ◽  
Adsorption Data ◽  
Langmuir Isotherm Model

Abstract Environmental pollution due to heavy metal contamination is a major environmental concern. A fully biodegradable and reusable adsorbent hydrogel for removal of heavy metal ions has been developed. The hydrogel was prepared from acrylic acid and chitosan using an irradiation method. The adsorbent was characterized using Fourier transform infrared analysis. Uptake of copper(II) and lead(II) at different contact times, pH, and metal ion concentrations was investigated by a batch method using atomic absorption spectroscopy. Kinetic adsorption data were studied using pseudo-first-order and pseudo-second-order equations. Experimental metal adsorption data were fitted with the Langmuir isotherm model. The maximum adsorption capacity of the hydrogel was found to be 192 and 171 mg/g for lead(II) and copper(II), respectively, from the Langmuir isotherm model. Reuse and desorption of the hydrogel were also successful. The adsorbent can be used to adsorb Cu(II) and Pb(II) by the column method with high removal efficiency. The data indicated that the designed hydrogel was environment friendly, regenerative, and can be used effectively for the removal of toxic heavy metal cations from wastewater for a sustainable environment.

Study of The Pharmacological Activity and Heavy Metal Content of Eichhornia Crassipes Extract

2019 ◽  
Vol 2 (2) ◽  
pp. 91-95 ◽  
Author(s):  
Jimmy Jimmy ◽  
Diah Indriani Widiputri ◽  
Paulus Gunawan
Keyword(s):  
Heavy Metal ◽  
Pharmacological Activity ◽  
Water Hyacinth ◽  
Metal Content ◽  
Eichhornia Crassipes ◽  
High Light Intensity ◽  
Milling Process ◽  
Heavy Metal Content ◽  
Solvent Ratio ◽  
Negative Impacts

Eichhornia crassipes is well-known as water hyacinth. Water hyacinth grows rapidly in the nutrient-rich water and high light intensity places. The uncontrollable growth of water hyacinth has caused many negative impacts to the environment. For instance, interrupted water transport and decreased population of aquatic lives. The capacity of utilising water hyacinth is slower than water hyacinth growth and water hyacinth is still considered as a threat to theecosystem. This work was focused on the study of the pharmacological activity and heavy metal content of water hyacinth in Lake Cipondoh, Tangerang. Fresh water hyacinth was pre-treated through oven-drying and milling process. After that, each part of the plant was macerated by using multiple extraction method with 96% ethanol/water and three variations of sample-to-solvent ratios (1:30, 1:50, and 1:75 w/v). The result of the experiment showed thatwater hyacinth leaves produced an extract with lowest IC 50 (55.76 ± 6.73 ppm) compared toother parts. The most optimum solvent used to achieve this result was 96% ethanol/water (1:1 v/v). In order to obtain the lowest antioxidant activity, the sample to solvent ratio used was 1:50 and the heavy metal in the extract was very low. With this result, it was concluded that there is a promising opportunity to apply the water hyacinth growing in Lake Cipondoh, Tangerang as herbal medicine ingredient. Through this utilization, the overall number of water hyacinth in Indonesia can be reduced or at the least be controlled, so that the environmental problem caused by this plant can be minimized.

scholarly journals Simulated Biosorption of Cd(II) and Cu(II) in Single and Binary Metal Systems by Water Hyacinth (Eichhornia crassipes) using Aspen Adsorption

2017 ◽  
Vol 16 (2) ◽  
pp. 21 ◽  
Author(s):  
Adonis P. Adornado ◽  
Allan N. Soriano ◽  
Omar Nassif Orfiana ◽  
Mark Brandon J. Pangon ◽  
Aileen D. Nieva
Keyword(s):  
Heavy Metal ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Metal Uptake ◽  
Process Analysis ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Competitive Sorption ◽  
Metal System ◽  
Binary Metal

Biosorption is becoming an attractive alternative for the removal of heavy metal from contaminated wastewaters since it offers low capital and operating costs. It has a great potential on heavy metal decontamination and the possibility of metal recovery. The study evaluated the performance of water hyacinth (Eichhornia crassipes) in a fixed bed column on sequestering heavy metals present in wastewaters. Column breakthrough curves at varying parameters were evaluated. The study used Aspen Adsorption® to simulate the biosorption process. Analysis of breakthrough curves for the single metal system shows that increasing both influent flow rate and initial metal concentration reduces the metal uptake of the column, while increasing bed height enhances the metal uptake of the column. Presence of both Cd(II) and Cu(II) in the system promotes competitive sorption processes. Analysis of the breakthrough curves for the binary metal system showed that copper ions adsorbed to the adsorbent are replaced by cadmium ions when the maximum capacity of the column is reached. This leads to the outlet concentration of Cu(II) exceeding its initial concentration. This phenomenon shows that Cd(II) has more affinity with E. crassipes than Cu(II).

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