Crushed olivine was added to a soil core mimic enhanced weathering, and water continually dripped through for ~6 months. Our experiments were conducted at 4°C, are compared previously run identical 19°C. Olivine dissolution rates in both start out similar, likely due fines sharp crystal corners. However, after >100 days of reaction, the rate 4°C two orders magnitude lower than The accumu...

Summary The capture of radioiodine species during nuclear fuel reprocessing and accidents is crucial for safety, environmental protection, public health. Previously reported emerging materials iodine uptake cannot outperform commercial zeolites active carbon under the practical dynamic scenario. Herein, we present a new design philosophy aiming at significantly enhanced specific host-g...

Diel pH changes in lake waters resulting from high photosynthetic activity may regulate water-soluble P concentration (WSP) and P sorption by suspended sediments in shallow eutrophic lakes. Laboratory studies were conducted to determine the pH effect on P fractions and P sorption kinetics in oxidized sediment suspensions from two subtropical lakes (Lake Apopka and Lake Okeechobee, Florida). The...

the removal of as(iii) ions from aqueous solutions has been investigated using silica ceramic under different experimental conditions of initial arsenite concentration, adsorbent dose, temperature and ph. better removal was obtained at temperature 25âºc and ph 7.5. the adsorption data have been explained in terms of langmuir and freundlich equations. the sorption kinetics was tested for the pse...

Nanoporous frameworks are polymeric materials built from rigid molecules, which give rise to their nanoporous structures with applications in gas sorption and storage, catalysis and others. Conceptually new applications could emerge, should these beneficial properties be manipulated by external stimuli in a reversible manner. One approach to render nanoporous frameworks responsive to external s...

We studied the effects of humic substances (HS) on the sorption of Fe(II) onto Al-oxide and clay sorbents at pH 7.5 with a combination of batch kinetic experiments and synchrotron Fe K-edge EXAFS analyses. Fe(II) sorption was monitored over the course of 4 months in anoxic clay and Al-oxide suspensions amended with variable HS types (humic acid, HA; or fulvic acid, FA) and levels (0, 1, and 4 w...

Phosphorus (P) has been recognized as one of the major limiting nutrients that are responsible for eutrophication of surface waters, worldwide. Efforts have been concentrated on reducing P loads reaching water bodies, via surface runoff and/or leaching through a soil profile. Use of drinking water treatment residuals (WTRs) is an emerging cost-effective practice to reduce soluble P in poorly P-...

Abstract Thermochemical heat storage is one of the most attractive technologies to store from solar thermal energy or waste industrial processes for its high density and long-term capability. This research presents a novel expanded graphite/alginate polymer matrix encapsulated with hydrated salts as highly efficient thermochemical materials. Through simple synthesis method, composite material c...

A new polymeric resin poly(maleic acid –acrylamide )-Cesium P(MA-AM)-Cs was prepared by gamma radiation-induced co-polymerization of maleic acid ( MA) with acrylamide (AM) in the presence of cesium chloride CsCl as a metal salt in aqueous solution route at 25 KGy to be used as a sorbent. The polymeric resin was characterized using Fourier transform infra-red spectroscopy (FTIR), simultaneous th...

SBA-CaCl 2 (SCa) composites with high CaCl content were prepared using the non-functionalized and methyl-and carboxyl-functionalized mesoporous SBA-15 supports their thermochemical heat storage (TCHS) performance have been investigated a TG/DSC system coupled humidity generator. This paper presents influence of silica (SBA-15) functionalization on structural-textural properties SCa consequently...