H2020Индивидуална стипендия2016–2018

NARS · Novel ecological adsorbent using Schwertmannite material for Removal of Selenate and Selenite from contaminated water

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2016-05-01 → 2018-04-30
Финансиране от ЕС: 159 461 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Екологични филтри от минерала швертманит се тестват за пречистване на вода от селенит и селенат. Това е важно, защото селенът е токсичен при високи концентрации, а съществуващите методи за премахването му често са скъпи или неефективни.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Novel ecological adsorbent using Schwertmannite material for Removal of Selenate and Selenite from contaminated water

Selenium is an essential micronutrient for humans and animals. However, it is also one of the most challenging trace elements because of its narrow gap between toxic (400 µg/day) and beneficial concentration (40 µg/day). Selenium is involved in both environmentally and biologically contaminated systems, particularly, selenium oxyanions (selenite (SeIV) and selenate (SeVI)). In drinking water, the EU established a concentration of 10 μg/L as the standard level of selenium. Many techniques (e.g. reverse osmosis, nanofiltration, algal-bacterial) have been investigated to remove selenium from water. However, they are limited either by deficits in efficiency or by cost issues. Thus, adsorbent techniques remain the most promising method for water treatment due to their simple design and cost-effectiveness. So far, various adsorbents have been developed which include activated alumina, activated carbon and iron oxyhydroxides. Activated carbon is well known to be a good adsorbent for the removal of heavy metal cations, albeit, it is completely ineffective to remove both selenate and selenite oxyanions. Aluminum oxide has been reported to be effective for selenite removal only. Recently, schwertmannite, a ferric oxyhydroxide sulfate (Fe8O8(OH)6SO4) that is biogenically produced upon treatment of Fe(II) rich groundwater in opencast lignite mines, has been applied with success to remove the oxyanions chromate and arsenate (Regenspurg and Peiffer, 2005; Paikaray et al., 2011) . Therefore, schwertmannite is a suitable candidate to control the mobility of selenium oxyanions and to reduce their concentration in contaminated water. The main purpose of NARS was to develop new ecological, low-cost and efficient filter materials based on schwertmannite to remove both selenite and selenate. The project aimed to fill the crucial knowledge gap that exists in understanding selenium oxyanions adsorption-desorption processes on schwertmannite surface sites, and that can be summarized by three key research objectives: i) determine and optimise the baseline process parameters needed to study the affinity of Se(IV) and Se(VI) to schwertmannite adsorbents, ii) study the efficiency of retention of Se species in column tests and, iii) investigate the regeneration and reuse of schwertmannite.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The purpose of this project is to test the suitability of recently developed schwertmannite adsorbents as filter bed materials as a new low-cost technique to remove selenite and selenate from mine water and agricultural drainage. The proposal deals also with critical societal and political issues like water management and sustainability as well as promoting good governance. To this end, an interdisciplinary approach combining hydrogeochemistry and technical development is implemented taking on consideration all the necessary steps of a novel ecological and low-cost water treatment technique. The project consists on two main components: 1) Filling knowledge gaps in the interaction of selenium oxyanions to schwertmannite adsorbents and how is it linked to the acidic pH, including the investigation of a separation method to reduce sorption competitiveness of sulphate towards selenate. 2) Optimising the performance of schwertmannite adsorbents to increase selenium removal rate. To set up a low-cost and eco-friendly process, the project will preform a regeneration study of the material, and explore the potential use of selenium generated from the process into glass-producing company. The fellow will benefit from a solid skill-set for a scientific career within academia, fruitful contact network for future and sustainable collaboration, as well as personal and cultural enrichment. The achievement of the project objectives will create a paradigm for clean and low-cost water treatment technologies, including water strategies, environmental policies and economic programmes.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITAT BAYREUTH · BayreuthКоординаторГермания