scholarly journals Arsenic (As) Removal Using Talaromyces sp. KM-31 Isolated from As-Contaminated Mine Soil

Minerals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 568 ◽  
Author(s):  
Nam ◽  
Murugesan ◽  
Ryu ◽  
Kim
Keyword(s):  
Arsenic Removal ◽  
Cost Effective ◽  
Arsenic Species ◽  
Fungal Strain ◽  
Environmentally Benign ◽  
Mine Soil ◽  
Potato Dextrose Broth ◽  
Arsenic Tolerance ◽  
Cost Effective Approach ◽  
Removal Of Arsenic

: Bioremediation is an environmentally-benign and cost-effective approach to removing arsenic from contaminated areas. A fungal strain hyper-tolerant to arsenic was isolated from soil from a mine site and used for the removal of arsenic. The isolated fungus was identified as Talaromyces sp., and its growth rate, arsenic tolerance, and removal rates were investigated for As(III) and As(V). Arsenic tolerance tests revealed that the fungus was highly resistant to arsenic, tolerating concentrations up to 1000 mg/L. Robust mycelial growth was observed in potato dextrose broth containing either As(III) or As(V), and there was no difference in growth between that in arsenic-free medium and medium amended with up to 300 mg/L of either arsenic species. The isolate showed relatively low growth rates at As(V) concentrations >500 mg/L, and almost no growth at As(III) concentrations >300 mg/L. Both arsenic species were effectively removed from aqueous medium (>70%) in tests of the biosorption of arsenic onto mycelial biomass. Surface modification of the biomass with Fe(III) (hydr)oxides significantly enhanced arsenic removal efficiency. The findings indicate that this soil fungal strain has promise for use in bioremediation strategies to remove arsenic from highly contaminated aqueous systems.

A contribution to solve the arsenic problem in groundwater of Ganges Delta by in-situ treatment

2008 ◽  
Vol 58 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
U. Rott ◽  
H. Kauffmann
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Treatment Plant ◽  
Cost Effective ◽  
Treatment Technology ◽  
Manganese Removal ◽  
Arsenic In Groundwater ◽  
Cost Effective Treatment ◽  
Removal Of Arsenic

Arsenic in groundwater is a huge problem in numerous regions of the world. Many people are exposed to high arsenic concentrations and consequently risk getting ill or even die as a result of arsenic poisoning. There are several efficient technologies for the removal of arsenic but often these methods have disadvantages, e.g. high costs for installation and/or operation, the need for chemicals or the production of arsenic contaminated filter sludge. These disadvantages can make the application difficult, especially in poor regions. Under suitable ancillary conditions the subterranean (in-situ) treatment, which is often used for iron and manganese removal from groundwater, can also be applied for the removal of arsenic and can be a cost-effective treatment technology. A field trial was carried out with a low-cost in-situ treatment plant in West Bengal/India which is described in this paper, in order to investigate whether this treatment technology is also applicable under the boundary conditions there. As for the in-situ treatment technology besides oxygen no additives are required and no arsenic contaminated filter sludge is produced this technology could be a suitable method for arsenic removal especially in poor regions.

scholarly journals Development and Characterization of Iron Coated Chitosan Beads (ICCB) to remove Arsenic from Groundwater

2020 ◽  
pp. 156-161
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Anthropogenic Activities ◽  
Cost Effective ◽  
Safe Drinking Water ◽  
Chitosan Beads ◽  
Experimental Adsorption ◽  
The World ◽  
Removal Of Arsenic

The current situation of Pakistan is reaching to an alarming situation in the context of polluting water bodies as well as groundwater due to various natural and anthropogenic activities, which can be foreseen for shortage and unavailability of safe and healthy drinking water for the population. The greater part of Pakistani individuals (almost 60%) living underneath the neediness line so they don't move toward perfect and safe drinking water supplies. Arsenic is one of the hazardous metals presents in various territories of Pakistan as well as in various zones of the world. Its essence strokes individuals' wellbeing by sullying the water. This experimental adsorption study emphasizes on the arsenic removal from drinking water by utilizing cost-effective adsorbent called "Iron Coated Chitosan Beads (ICCB)". This technique is more useful and effective when contrasted with different removal methodologies to remove arsenic from groundwater. ICCB was utilized and it was discovered a compelling and productive adsorbent for the removal of arsenic from groundwater. From all clump tests, the removal level of arsenic is achieved from 79 % to 98%. These results demonstrated that ICCB can be utilized as a productive adsorbent material for the removal of arsenic from water.

scholarly journals Energy Efficient Rapid Removal of Arsenic in an Electrocoagulation Reactor with Hybrid Fe/Al Electrodes: Process Optimization Using CCD and Kinetic Modeling

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2876 ◽  
Author(s):  
Saif Ullah Khan ◽  
Izharul Haq Farooqi ◽  
Muhammad Usman ◽  
Farrukh Basheer
Keyword(s):  
Energy Consumption ◽  
Arsenic Removal ◽  
Low Cost ◽  
Minimum Energy ◽  
Ferric Hydroxide ◽  
Cost Effective ◽  
Complete Removal ◽  
Coefficient Of Determination ◽  
Time Duration ◽  
Removal Of Arsenic

Threats due to insufficient, inadequate and costlier methods of treating contaminants such as arsenic have emphasized the significance of optimizing and managing the processes adopted. This study was aimed at the complete elimination of arsenic from an aqueous medium with minimum energy consumption using the electrocoagulation process. Arsenic removal around 95% was rapidly attained for optimized conditions having a pH of 7, 0.46 A current intensity, 10 mg/L initial concentration and only 2 min of applied time duration using the energy of 3.1 watt-hour per gram of arsenic removed. Low values of applied current for longer durations resulted in the complete removal of arsenic with low energy consumption. Various hydroxide complexes including ferrous hydroxide and ferric hydroxide assisted in the removal of arsenic by adsorption along with co-precipitation. Surface models obtained were checked and found with a reasonably good fit having high values of coefficient of determination of 0.933 and 0.980 for removal efficiency and energy consumption, respectively. Adsorption was found to follow pseudo-first-order kinetics. Multivariate optimization proved it as a low-cost effective technology having an operational cost of 0.0974 Indian rupees (equivalent to USD 0.0013) per gram removal of arsenic. Overall, the process was well optimized using CCD based on response surface methodology.

Enrichment of arsenite oxidizing bacteria under autotrophic conditions and the isolation and characterization of facultative chemolithoautotrophic arsenite oxidizing bacteria for removal of arsenic from groundwater

2012 ◽  
Vol 12 (5) ◽  
pp. 707-714 ◽  
Author(s):  
L. Nguyen Ai ◽  
A. Sato ◽  
D. Inoue ◽  
K. Sei ◽  
S. Soda ◽  
...  
Keyword(s):  
Arsenic Removal ◽  
Enrichment Culture ◽  
Large Subunit ◽  
Cost Effective ◽  
Isolation And Characterization ◽  
The World ◽  
Genes Encoding ◽  
Arsenite Oxidizing Bacteria ◽  
Removal Of Arsenic

Arsenic contamination in groundwater has caused severe health problems throughout the world. Developing cost-effective processes for arsenic removal is an emerging issue. Because As(III) is predominant in groundwater and is more difficult to remove than As(V) is, oxidation of As(III) to As(V) is necessary to improve overall arsenic removal. This study was undertaken to enrich arsenite oxidizing bacteria under autotrophic conditions and to isolate and characterize facultative chemolithoautotrophic arsenite oxidizing bacteria (CAOs) that can oxidize As(III) effectively to As(V). An enrichment culture which adapted wide As(III) concentrations and completely oxidized 12 mM As(III) within 4 days under autotrophic conditions was established and maintained. Among 10 isolated strains, 6 strains, B1, B2, C, D, E1 and E2 belonging to β-Proteobacteria, were facultative CAOs and contained aoxB genes encoding the arsenite oxidase large subunit. Furthermore, they displayed various As(III) oxidation capabilities: B1, B2, E1 and E2 efficiently oxidized 1–10 mM As(III). The others showed efficient oxidation at 1–5 mM As(III), suggesting the coexistence of facultative CAOs with various As(III) oxidation capabilities in the enrichment. These results suggest that constructed enrichment and strains B1, B2, E1 and E2 can be useful for the bioremediation of arsenic-contaminated groundwater.

Removal of arsenic from water through ceramic filter modified by nano-CeO2: A cost-effective approach for remote areas

2021 ◽  
Vol 750 ◽  
pp. 141510
Author(s):  
Xiaohan Yang ◽  
Guohe Huang ◽  
Chunjiang An ◽  
Xiujuan Chen ◽  
Jian Shen ◽  
...  
Keyword(s):  
Cost Effective ◽  
Ceramic Filter ◽  
Remote Areas ◽  
Cost Effective Approach ◽  
Removal Of Arsenic

E-Insurance :A Platform For Insurance Penetration In India

2019 ◽  
Vol 118 (6) ◽  
pp. 90-93
Author(s):  
L. Terina Grazy ◽  
Dr.G. Parimalarani
Keyword(s):  
Insurance Industry ◽  
Cost Effective ◽  
Online Marketing ◽  
Insurance Companies ◽  
The Internet ◽  
Insurance Sector ◽  
The People ◽  
Cost Effective Approach ◽  
Time And Energy ◽  
Work Done

E-commerce is a part of Internet Marketing. The arrival of Internet made the world very simple and dynamic in all the areas. Internet is the growing business as a result most of the people are using it in their day to day life. E-commerce is attractive and efficient way for both buyers and sellesr as it reduce cost, time and energy for the buyer. No surprise the insurance sector has become quite active within the internet sphere. Most insurance companies are offering policies to be brought online and also the portals for paying premiums. It actually saves from hassles involved in going to an insurance office and spend hours to get the insurance work done. Insurance has become an important and crucial aspect of life. Online insurance is the best and most cost effective approach of taking the insurance deal. This paper focused on influence of online marketing on the insurance industry in India, usage of internet in India , the internet penetration in India and the online sale of insurance product by the insurance sector.

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