Anastasios I. Zouboulis

TL;DR: The physico-chemical process may be used as a useful pretreatment step, especially for fresh leachates, prior to biological treatment, or as a post-treatment (polishing) step for partially stabilized leachate.

TL;DR: In this paper, the use of biological materials for effective removal and recovery of heavy metals from contaminated wastewaters has emerged as a potential alternative method to conventional treatment techniques, which can provide a large contact interface, which would interact with metals from the surrounding environment.

TL;DR: Though, among the examined materials, polyHIPE was found to be more effective in the removal of arsenic, as far as it concerns the maximum sorptive capacity before the filtration bed reaches the respective breakthrough point.

TL;DR: The results showed that both inorganic forms of arsenic could be efficiently treated, for the concentration range of interest in drinking water (50-200microg/L), and the oxidation of trivalent arsenic was found to be catalyzed by bacteria, leading to enhanced overall arsenic removal.

TL;DR: In this paper, the composition of leachates varied widely depending mainly upon their degree of stabilization and upon their seasonal production, representing the influence of different climatic conditions, and suggestions have been proposed for the subsequent treatment of leaches, based upon hydrological and leachate quality data, in order to avoid environmental deterioration problems caused by direct disposal.

TL;DR: The scale of the problem in terms of population exposed to high As concentrations is greatest in the Bengal Basin with more than 40 million people drinking water containing ‘excessive’ As as mentioned in this paper.

TL;DR: An overview of second-order kinetic expressions is described in this paper based on the solid adsorption capacity, which shows that a pseudo-second-order rate expression has been widely applied to the Adsorption of pollutants from aqueous solutions onto adsorbents.

TL;DR: Strong acids and bases seem to be the best desorbing agents to produce arsenic concentrates, and some commercial adsorbents which include resins, gels, silica, treated silica tested for arsenic removal come out to be superior.

TL;DR: The technical feasibility of various low-cost adsorbents for heavy metal removal from contaminated water has been reviewed and it is evident from the literature survey of about 100 papers that low- cost adsorbent have demonstrated outstanding removal capabilities for certain metal ions as compared to activated carbon.

TL;DR: The use of low-cost sorbents has been investigated as a replacement for current costly methods of removing heavy metals from solution as mentioned in this paper, where natural materials or waste products from certain industries with a high capacity for heavy metals can be obtained, employed and disposed of with little cost.