Advanced material and approach for metal ions removal from aqueous solutions

Abstract

A Novel approach to remove metals from aqueous solutions has been developed. The method is based on a resin free, solid, non-toxic, microcrystalline bisphosphonate material, which has very low solubility in water (59 mg/l to ion free Milli-Q water and 13 mg/l to 3.5% NaCl solution). The material has been produced almost quantitatively on a 1 kg scale (it has been prepared also on a pilot scale, ca. 7 kg) and tested successfully for its ability to collect metal cations from different sources, such as ground water and mining process waters. Not only was this material highly efficient at collecting several metal ions out of solution it also proved to be regenerable and reusable over a number of adsorption/desorption, which is crucial for environmental friendliness. This material has several advantages compared to the currently used approaches, such as no need for any precipitation step.

Conversion of Biological Treatment Plant Sludge to Organic Fertilizer for Applications in Organic Farming

“…This was done first by the traditional leaching method, using nitric acid as the leaching agent, where the supernatant solution of the sludge then contains nitrate anion. The removal of nitrate from water requires adsorptive methods since nitrates cannot be easily precipitated out (Turhanen et al, 2015). Ion-exchange (Cummins 2019) and reverse osmosis (Pangarkar et al, 2011) are other possibilities but these techniques are expensive.…”

Selective solid‐phase extraction of metal for water decontamination

“…Mining, electroplating, tanneries, metallurgical, textile, painting, and car radiator manufacturing activities are major sources [1][2][3][4] from which metals originate and contaminate water. Industrial wastewater is a major source of pollution because it contains chemicals along with different metals and metal ions.…”

“…Therefore, their separation from wastewater is essential. Mining, electroplating, tanneries, metallurgical, textile, painting, and car radiator manufacturing activities are major sources [1][2][3][4] from which metals originate and contaminate water. Most industrial effluents contain metal-ion concentrations that are much higher than the permissible limit.…”

Synthetic Procedures Leading towards Aminobisphosphonates

“…This strong interest results from these compounds acting as strong inhibitors of bone resorption, with several representatives of this class already commercialized as drugs of choice for the treatment of osteoporosis, skeletal complications of malignancy, Paget's disease, multiple myeloma, hypercalcemia and fibrous dysplasia [2][3][4][5][6][7] Consequently, most of the papers are devoted to various clinical aspects of the anti-resorptive effects that bisphosphonates exert towards bone tissues; however, there is also a growing interest in their applications as anticancer and antibacterial agents [5][6][7]. Additionally, aminobisphosphonic acids have found important industrial applications, largely as inhibitors of scale formation and as corrosion inhibitors, actions which result from their ability to complex metal ions [8][9][10].…”