Groundwater arsenic contamination

Nano-adsorbents have gained special attention in water pollution mitigation in India since last decade. Two vital properties make nanoparticles highly lucrative as adsorbents. On a mass basis, nano-particles have much larger surface areas compared to macro particles. They can also be enhanced with various reactor groups to increase their chemical affinity towards target compounds. Nano-adsorption techniques are now widely used to remove cations, natural organic matter, biological contaminants, inorganic pollutants, nitrates and arsenic from groundwater, surface water and industrial effluents.

5p cothumenhmong9 04-01-2021 18 1   Download

This study aims to understand the concentrations of selected heavy metals including arsenic, iron, manganese, cadmium and mercury in groundwater used for domestic purposes in Dak Nong Province of Viet Nam. A total number of 572 groundwater samples including 61 duplicates were collected during October, 2018 – April, 2019. The collected samples were measured onsite for pH and preserved with 2 % HNO3 until pH < 2 before being analyzed in the laboratory for heavy metals by inductively coupled plasma mass spectrometry.

8p angicungduoc5 13-06-2020 9 0   Download

Inorganic Arsenic (iAs) contamination of groundwater had been a major health hazard. In West-Bengal, many areas had been found to have high level of iAs in groundwater. Chronic exposure to iAs may lead to the generation of Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS). This results in DNA damage, inflammation, impairment of repair activity, thereby culminating in carcinogenesis. Higher telomerase activity may be another manifestation of iAs exposure. This is a pilot study involving 15 subjects residing in an arsenic endemic area of West-Bengal.

14p caygaocaolon4 04-04-2020 15 1   Download

Ground water is the major source of drinking water in both rural and urban areas which may be contaminated by various means, Arsenic is one of them. Forty five hand-pump and river samples (containing 250ml each) from different blocks of Bhojpur district, Bihar were collected in sterile containers and analyzed.

12p caygaocaolon2 14-03-2020 9 0   Download

Arsenic is a potential contaminant of groundwater as well as soil in many parts of the world. Elevated soil arsenic levels resulting from long-term use of arsenic contaminated ground water for irrigation may inhibit seed germination and seedling establishment of rice, the country’s main food crop. An experiment was conducted to determine response of rice (Oryza sativa L) to arsenate and arsenite stress. For this purpose seeds were treated with 0, 5, 10, 15 and 20 ppm of arsenate and arsenite solution individually.

5p cothumenhmong1 08-12-2019 11 0   Download

Arsenic contamination in groundwater and its effect on human health has been a growing concern over recent decades. Some of the most severe incidents occurred in South and Southeast Asia, including the Red river delta, Vietnam. The highest concentration of arsenic found in the Red river delta was 810 µg/L, 16 times higher than the standard guidelines given by WHO for levels of arsenic concentration in groundwater (50 µg/L). However, the contamination levels were not uniform in the whole area.

5p caygaocaolon1 13-11-2019 12 2   Download

Arsenic (As) contamination in groundwater has been recognized in the Mekong River Delta (MRD) since 2001, especially in Dong Thap and An Giang provinces. The investigations were carried out during 2008-2009 and from 2012 to present. The investigations of As distribution in groundwater and sediments were based upon the field, and laboratory analyses using field kit (Hironaka, 1998) and AOAC laboratory - Vietnamese standard 6626-2000 (Vilas).

10p meolep4 02-01-2019 24 1   Download

In recent several years there were publications of arsenic contamination in groundwater. This event actuated us to study and explain the mechanism of arsenic releasing into groundwater of aquifers under alluvial plains. Understanding of this mechanism could make clear of the relations between solid phase (arsenic-bearing material) and water phase (arsenic dissolvable) in earth crust layers.

5p uocvong04 24-09-2015 46 3   Download

Groundwater is an important resource that serves as a backbone of human development. In several regions, mostly in developing countries, groundwater from sedimentary and hard rock aquifers used for drinking is naturally contaminated with arsenic. In different countries in Asia such as India, Bangladesh, Cambodia, China, Nepal, Pakistan, Taiwan, Thailand and Vietnam, the situation of arsenic toxicity is alarming and severe health problems are reported amongst the inhabitants relying on groundwater as sources of water for drinking purposes....

299p 951628473 07-05-2012 87 24   Download

Natural Arsenic in Groundwater: Occurrence, Remediation and Management – Bundschuh, Bhattacharya and Chandrasekharam (eds) © 2005, Taylor & Francis Group, London, ISBN 04 1536 700 X Implementation of safe drinking water supplies in Bangladesh C.F. Rammelt & J. Boes Faculty of Technology, Policy and Management, Delft University of Technology, Delft, Netherlands ABSTRACT: The normal focal point with the introduction of ‘new’ technologies is the technique itself despite numerous experiences that show that most problems evolve around its implementation process.

11p bengoan741 23-12-2011 63 7   Download