Development of Low cost Arsenic Removal Technologies to mitigate Arsenic from contaminated water

Md. Ahedul Akbor, SSO, PL, Dr. Mohammad Mostafa, PSO, Md. Aminul Islam, PSO, Dr. Shajahan Siraj, SSO, Shamim Ahmed, SSO, Md. Abu Bakar Siddique, SO

Introduction

Water intended for human consumption should be both safe and wholesome. Without ample safe drinking water, communities cannot be healthy. Arsenic contamination of groundwater in Bangladesh is widespread and acute and an estimated 30 million Bangladeshi (Heikens 2006) obtain their drinking water from shallow tubewells that are contaminated with arsenic above the national drinking water standard of 50 mg/I (Government of Bangladesh [GoB], 1997). Arsenic is poisonous and known cancers causing agent (Centeno et al. 2002, Loewenberg 2007) and approximately 10,000 – 30,000 Bangladeshis have already been diagnosed with arsenicosis (Heikens 2006). Thus, meeting the need for arsenic-safe.’ drinking water in Bangladesh is urgent. Arsenic removal filters could help meet the needs of some arsenic- affected populations, especially in areas where no arsenic-free water sources are available. Indeed, as a supplementary option, filters could help the government.

Objectives

Developed a low cost Arsenic Removal Technology to mitigate Arsenic from the contaminated water and

  • Provide technical information governing the performance of ART with various water matrices,
  • Produce statements on the performance of ART under “real world” conditions,
  • Support large-scale future technology deployment and installations
  • Knowledge regarding the ART’s ability to remove other harmful chemicals from contaminated groundwater,
  • Highlight ways and means of improving ART’s performance
  • More importantly, obtain better knowledge and understanding of ARTs and their efficacy for generating safe drinking water for populations in arsenic-affected areas of Bangladesh

Progress / Outcome

A literature review on existing technologies has been conducted for developing a low coat arsenic removal technology.  One of the media and possible structure of this technology has been developed. Testing process is going on to find out how much arsenic          it can remove, how much water it can treat without media saturation and tried to estimate it flow rate. Now we have tested it by using synthetic water. Site selection and well characterized has been done for real water testing.

 

Removal of Heavy Metals from Polluted Water Using Low Cost Adsorbent Materials

Md. Abu Bakar Siddique, SO, PL, Dr. Mohammad Mostafa, PSO, Md. Aminul Islam, PSO, Dr. ShajahanSiraj, SSO, Shamim Ahmed, SSO, Md. AhedulAkbor, SSO

Introduction:

Heavy metal pollution has become one of the most serious environmental problems nowadays. The removal of heavy metals from the environment is of special concern due to their persistence.  The presence of zinc, cadmium, nickel and others metals in the aqueous environment has a potentially damaging effect on human physiology and other biological systems when the acceptable levels are exceeded. Heavy metals cannot be degraded or destroyed.  The conventional method for heavy metal removal includes chemical precipitation, membrane filtration, ion exchange, reverse osmosis, electro-dialysis, solvent extraction, evaporation, oxidation and adsorption.  However, adsorption has proven to be economical and efficient for removing heavy metals, organic pollutants and dyes from polluted waters.  In our work, a number of low cost adsorbent materials will be synthesized, processed and will be used as adsorbents for heavy metal removal.

Objectives

  • To remove heavy metals from waste water and ground water using low cost adsorbent materials.
  • To find out a suitable adsorbent materials which acts as better adsorbents for heavy metals removal.
  • To prepare an appropriate media which will help local people to remove toxic heavy metals from ground water for drinking purpose.
  • To minimize heavy metals pollution in surface water.
  • To mitigate heavy metal pollution due to industrial waste water.
  • To develop a new appropriate technology for heavy metals removal.
  • To Support large-scale future technology deployment and installations.
  • To gather knowledge regarding the ability of this technique to remove other harmful chemicals from contaminated groundwater and waste water.

Progress / Outcome:

Nine adsorbent materials including different oxides of Manganese, Graphene and their composites have been synthesized and characterized by XRD, FT-IR, SEM and TGA successfully. The materials are now using as adsorbent for heavy metals removal and this whole process is under working.

 

Removal of Lead from waste water by low cost Adsorbents

 

Md. Aminul Islam, PSO, PL, Md. Ahedul Akbor, SSO, Shamim Ahmed, SSO, Md. Majedul Haque, SSO, Md. Abu Bakar Siddique, SO, AHM Shofiul Islam Molla Jamal, SO

Introduction

Heavy metals such as lead can often be found in industrial wastewater and their discharge to the environment poses a serious threat due to their acute toxicity to aquatic and terrestrial life which includes humans. As a result of increasing industrialization more heavy metals are being continually released to the environment and this has prornpted environmental engineers and scientists to investigate methods by which heavy metal-bearing wastewaters can be treated effectively and economically. Enhanced industrialization and discovery of various uses for lead however have caused humans to disinter it, which has caused the release of large quantities of the by-product of this material into air, soils and surface waters. It is used as an industrial raw material in manufacturing of storage batteries, television tube, printing, paints, pigments, photographie materïals, füeIs, matches and explosives. The manufacturing process of these materials produces lead-bearing wastewaters, which have to be treated and disposed of One of the largest consumers of lead is the storage battery industry followed by the petroleurn industry in producing gasoline additives. Lead concentrations in wastewater from battery manufacturing, acid mine drainage, tailing pond and steel production plants range from 0.5 to 25 mg/L.

Objectives

  • To find out a suitable and low cost adsorbent material(s) for developing a technology to remove toxic lead metal from industrial waste water.
  • To prepare an appropriate media which will be helpful for lead base industries to remove toxic lead metal from their effluent.
  • To mitigate heavy metal (Lead) pollution in our environment due to industrial waste (polluted) water.
  • To Support large-scale future technology deployment and installations.
  • To gather knowledge regarding the ability of this technique to remove other harmful chemicals from contaminated waste water.

Outcome

Chemical fingerprint profile of secondary metabolites of selected medicinal plants

 

Shamim Ahmed, SSO, PL, Dr. Mohammad Mostafa, PSO, Muhammad Abdullah Al-Mansur, SSO

Shakila Akter, SSO, Md. Ahedul Akbor, PL, Md. Ripaj Uddin, RC

Introduction

Plants may be regarded as libraries of small molecule secondary metabolite organic compounds with considerable structural diversity, which would otherwise probably be unavailable in a synthetic chemical laboratory. Plants have developed chemical defenses over millions of years against environmental threats such as UV radiation, reactive oxygen species and microbial attacks. Therefore phytochemicals are less toxic and biologically active. The present scenario shows the demand for plant drugs throughout the world because of its valuable phytochemicals. Now a day’s new technology have made it possible to identify, screen and isolate these active compounds. The chromatographic and spectral fingerprints play an important role in the quality control of complex herbal medicines. Development of chemical fingerprints using TLC, HPLC is an effective tool for linking the identity for estimation of chemical and bio chemical markers. The advancement of TLC, High Performance Chromatography (HPLC) can provide an electronic image of chromatographic finger print and densitogram to detect the presence of a marker compound in the plant sample. It is efficient and economic for the analysis of broad number of compounds. It has the potential to determine authenticity and reliability of chemical constituent of herbal drug and formulation.

Objectives

  1. To develop HPLC fingerprints to distinguish the adulterant and standardization of herbal formulations.
  2. To develop analytical method for isolation of marker chemicals from the standard herbal drugs or medicinal plants.
  3. To ensure the quality of the herbal drugs using modern analytical techniques, for therapeutic efficacy and safety.

Progress / Outcomes

Four medicinal plants Adhatoda vasica, Andrographis paniculata, Asparagus racemonus and Withania somnifera herbal monograph has been completed. Two compounds namely Neoandrographolides and quercetin 3-O-beta-D-glucopyranoside were isolated.

Development of value added products from Aquillaria malaccenisis Lam (Agar) and Tergetes erecta Linn (Genda phul)

 

Dr. Mohammad Mostafa, PSO, PL, Shamim Ahmed, SSO, Shakila Akter, SSO, Md. Ahedul Akbor, SSO, Ms. Katrun Nada, CSO

Introduction

Agar is traded in several forms from large sections of trunk to highly processed fine products including incense and perfumes. The essence extracted from agar wood is now widely used as a fragrance to manufacture beauty soaps and shampoos etc. Trade in the agar wood dates back as early as the 13th century. Agar is one of the most promising non-timber forest products (NTFPs) of Bangladesh, and earned Tk.1 300M through exports of attar (agar oil) in 2004. About 25,000 workers were engaged in cultivation, collection, processing and marketing of agar and agar-based products in that year. Despite the huge demand in local and international markets, no major extension program has so far been conducted by governments or other agencies in Bangladesh. The plant Tagetes erecta Linn. Locally known as Genda Phul (Marigold) belongs to the family Asteraceae. It is a stout, branching herb, native of Mexico and other warmer parts of America and naturalized elsewhere in the tropics and subtropics including India and

Bangladesh. The flower is useful in fevers, epileptic fits (Ayurveda), astringent, carminative, stomachic, scabies and liver complaints, skin diseases and is also employed in diseases of the eyes. The Essential Oil of Tagetes is extracted from its leaves, stem, stalk, and flowers by the process of steam distillation. The main components of this oil are limonene, ocimene, tagetone and valeric acid.

Objectives

  • To Extract, Fractionate and characterize of the active ingredients from Aquillaria

         malaccensis Lam and Tagetes erecta Linn.

  • To evaluate the biological activities of the extracts as well as active ingredients.
  • To develop of value added products from these active ingredients.

Progress / Outcomes

The antibacterial and antioxidant activities as well as phytochemical screening of different extracts of  Tagetes erecta L flowers have been completed. Two compounds were isolated from the ethylacetate extract by Column Chromatography and identified as Erythrodiol-3-palmitate and α-Amyrin palmitate by NMR studies.

Development and validation of analytical methods for the estimation of vitamins in medicinal and dietary products

Dr. Shajahan Siraj, SSO, PL, Md. Aminul Islam, PSO, Shamim Ahmed, SSO, Muhammad Abdullah Al-Mansur, SSO, AHM Shofiul Islam Molla Jamal, SO, Md. Ripaj Uddin, RC

Introduction

Vitamins are organic compounds, essential nutrients, which are important to human and animals for the existence of their life. Vitamins are also crucial for the maintenance of good health. Our body obtains them from our diet. Most of the vitamins needed are found in foods. Shortage of vitamins in our body can develop deficiencies and result in health issues. Often doctors prescribe vitamins supplement to make up shortages. For this reason, the estimation of vitamins in medicinal and dietary products needs to be checked and it is very essential, in order to ensure correct intake and the accuracy of the label statements.

Objectives

  1. To develop a selective and sensitive analytical method for rapid quantification of water and fat soluble vitamins in various matrices.
  2. To validate the analytical methods for specific vitamins in different matrix (plant products, dairy products, poultry products, beverages and drinks, candies, baby cereals and vitamin syrups etc).
  3. To obtain ISO/IEC:17025 accreditation on analysis of vitamins in food supplements.

Progress / Outcomes

A literature review on existing analytical methods has been conducted to find out the possible methods for application and room for further improvement.  Standards of water and fat soluble vitamins such as vitamin B1, B2, B5, B6, B9, B12, ascorbic acid,  Vitamin A, D, b-carotene etc. have been purchased separately and  a mixed standard of the vitamins has been prepared.  The prepared mixed standard has been analysed using High performance liquid chromatograph and separate peaks are identified for individual vitamin standard.  Some parameters e.g., linearity, specificity, method detection limit are determined as part of validating the developed method.  Some of the food supplementary products e.g., baby cereals, vitamin syrups have been collected from local market to examine the amount of vitamins if they comply with the concentration shown on the label of the product.

Isolation and characterization of Bioactive compounds from Anethum  sowa Linn.

Muhammad Abdullah Al-Mansur, S.S.O Dr. Mohammad Mostafa, P.S.O., Md. Aminul Ahsan, P.S.O., Shamim Ahmed, S.S.O., Shakila Akter, S.S.O., Md. Ahedul Akbor, S.S.O., Mohammad Majedul Haque, S.O.

Introduction:

The main aim of this R&D Project is to discover novel, potent and selective compounds with potential activity to treat diseases. All aspects of this programme have been designed to streamline the isolation, evaluation, purification and characterization of potentially useful bioactive compounds. The purpose of extensive phytochemical research is to isolate the active constituents in the pure form to avoid unwanted effect and to ensure safe use of herbal medicines.

Objectives:

The objective of this research project is to discover novel bioactive molecules from medicinal plants such as Anethum  sowa Linn. (Family: Apiaceae ; Bengali name: Shulfa, Soya, Solup, Hoilfa, Sowa) using modern separation, isolation and spectroscopic techniques. Value addition of discovered bioactive molecules will be achieved through the development of precise, rapid and sensitive analytical method of detection and quantification useable for the quality evaluation of the source, followed by the non-destructive extraction, fractionation and isolation processes. The isolated bioactive molecules will be assessed for their safety and efficacy in animal models to find out the suitable lead compounds for the clinical study. Logical modification of constituents will be attempted for improved activity.

Progress / Outcomes

The plant Anethun sowa Linn was collected from Karanigonj, Dhaka and it was identified by Bangladesh National Herbarium .The stems and seeds of the plant were extracted separately by n-hexane, dichloromethane, ethyl acetate and methanol in successive manner. Total eight extracts from different parts of the plant were examined for their bioactivity like Cytotoxic, Antimicrobial ,Antioxidant, Thrombolytic, Membrane Stabilizing, Antidiarrhoeal , Analgesic and Hypoglycemic activity using different well established bioassay procedures. The results of these bioassays were encouraging. Preliminary phyotochemical screening of the plant extracts were performed & many valuable bioactive metabolites were found. Analyses of proximate composition, mineral, heavy metal contents and gas chromatography-mass spectroscopy (GC-MS) of different extracts have been carried out by separate experiments. The results of these analyses were significant.

Assessment of physicochemical properties of rainfall water in Bangladesh.

A.H.M. Shofiul Islam mollajamal, SO, PL, Md. Aminul Ahsan, PSO, Shamim Ahmed, SSO, ShakilaAkter, SSO, Md. Abu Bakar Siddique, SO, Md. Ripaj Uddin

Introduction

Groundwater has been reported to be contaminated by the Arsenic (As) in Bangladesh since 1993, which was highly hazardous for human health and for food safety as well. To overcome the As contaminated health hazards, rainwater harvesting was found to be one of the best remedial measures for the rural people of Bangladesh. Bangladesh has a subtropical monsoon climate characterized by wide seasonal variations in rainfall, moderately warm temperatures, and high humidity. The number of mills and industries is increasing day by day. The time has come to identify the correlation between the quality of rainwater and the emission of the medium and heavy industries in the different area of Bangladesh.

Objectives

To assess physicochemical properties of rainfall water in different regions ( Dhaka, Chittagong, Rajshahi, and Khulna) of Bangladesh during Spring, Summer, Autumn and Winter season. To assess the rainfall water whether it is acidic or not in different regions of Bangladesh. To investigate the variation of different physicochemical properties like PH, Electrical Conductivity, Acidity, Alkalinity, Hardness, Carbon dioxide, various anions, Volatile Organic Carbon, Total Organic Carbon, Total solids, Total dissolved solids, Silica, Lead etc of rainfall water. To use statistical data on physicochemical properties of rainfall water to harvest rainwater for drinking and agriculture purposes more scientific method.

Progress/Outcome

Rainwater sample was collected two times in February and June in 2018 from Dhaka, Chittagong, Rajshahi, and Khulna and tested. The analysis result was significant. The dissolved oxygen of rainwater of Dhaka is the lowest and Rajshahi is the highest among collected samples.  The quality of rainwater of Rajshahi and Khulna is better than that of  Dhaka and Chittagong.

Scaling and Modeling on bottled and filter water quality from locally available in Bangladesh.

Md. Ripaj Uddin, R.C. (PD), Md. Aminul Ahsan, P.S.O, Shamim Ahmed, S. S.O.

Md. AhedulAkbor, S. S.O, ShakilaAkter, S.S.O, Md Abu BakarSiddik, SO,A.H. M. Shofiul Islam Molla Jamal, S.O.

Introduction:

Water is a basic need in ours daily life and is essential in carrying out various physiological functions in the human body. Humans can survive without food for a month, but they can survive without water for only seven days.More than 50 national, regional, governmental and non-governmental industries produce drinking water every day but this water are not fulfil our demand or sanitation. Lack oflaw and policy of drinking water most of the company produce distilled water which very harmful to our health.The demand of drinking water incised day by day million liters per day so we should be careful about this matter.Government will be able to implement drinking water related law and policies.

Objectives:

  • To determine the minimum amount of mineral should be in drinking water
  • To make scaling of water quality parameters in bottled water.
  • To monitor on the bottled water and filter water in the local market and making a data sheet for modeling.

Expected outcome of the project:

 

  • Publish papers in international Journals.
  • Determine fix amount of minimum mineral in drinking water
  • Make sure a data sheet for modeling.
  • Make sure scaling of water quality parameters in bottled water

Recommended to government for implement of water law and policies

Easy process development of desalination from saline water in Bangladesh.

Md. Ripaj Uddin, R.C. (PD), Md. Aminul Ahsan, P.S.O, Shamim Ahmed, S. S.O.

Abdullah Al Mansur, S.S.O, Sabina Yeasmin, SO, Md Abu Bakar Siddik, SO.

Introduction:

Salinity problem is the common problem in Costal area of Bangladesh.River or sea water available in Bangladesh but this water is not drinkable. The demand of drinking water incised day by day million liters per day so we should be careful about this matter. Every city has fallen below the level of water so it is time to do alter. Without mineral we do not ensure a defense against several diseases, such as congenital cataracts, nephrogenic problems, and diabetes. Government may earn foreign currency by the way of import business and fulfill domestic interest. Government will be able to implement drinking water related law and policies.

Objectives:

  • Salinity free drinking water
  • To enrich values of potassium and sodium reflect its alleged ability to affect the human nervous system by drinking water.
  • To make sure higher concentration of calcium and magnesium in drinking water this helps to maintain strong bones.
  • To confirm the balanced mineral and nutritional composition of drinking water.
  • To product higher quality of drinking water for drinking purposes obviously helps all kinds of people in Bangladesh.

Expected outcome of the project:

 

  • Publish papers in international Journals.
  • Development allow cost process which will be commercially important
  • Development an easy salinity refines process of sea or river water.
  • Recommended to government for implement of water law and policies

Updated: September 25, 2018 — 9:27 am
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