Track topics on Twitter Track topics that are important to you
Distiller waste (DW), a common by-product of soda ash plants, was used as the unique calcium source to produce low-cost hydroxyapatites (HAPs) for the first time. The DW-derived HAPs were characterized by SEM, TEM, XRD and BET methods and investigated as amendments for soil Pb immobilization. The DW-derived HAPs displayed relatively smaller particle size (30-80 nm) and larger BET specific surface areas (60.00-64.06 m/g) compared with two selected commercial HAPs (technical grade HAP and biological reagent HAP designated as HAP-TG and HAP-BR, respectively). The maximum sorption capacity of Pb on the DW-derived HAPs predicted from Langmuir sorption isotherm model was 726-734 mg/g higher than the commercial HAPs and even other well-designed sorbents. TCLP leaching experiments and BCR sequential extraction experiments were conducted to determine the effectiveness of HAP additions on Pb immobilization in soil. A lower addition ratio is required for the DW-derived HAPs than commercial HAPs to reduce Pb leachability to below the harmless level. Meanwhile, the DW-derived HAPs were found to be superior to commercial HAPs in transformation of readily bioavailable forms of Pb to stable speciation in soil, with residual fraction of Pb increased from 6.7% in non-amended soil to 60.7-61.4% in DW-derived HAPs amended soils, 58.3% in HAP-TG amended soil and 42.6% in HAP-BR amended soil, respectively. This study strongly demonstrated the feasibility and low-cost of HAPs derived from the distiller waste for reducing the environmental risks and bioavailability of Pb in soil.
This article was published in the following journal.
Name: Journal of colloid and interface science
Lead (Pb) complexed with dissolved organic matter (DOM-Pb) is a dominant Pb species in soils, but it is not clear that DOM-Pb is stably immobilized by hydroxyapatite. This study investigates how DOM-P...
Hydroxyapatite (HA) nanoparticles are promising materials for enzyme immobilization, since they provide a high specific surface area for enzyme loading and can also be modified with metal ions (HA-Me)...
Enzymes are natural catalysts highly specific to the substrate type and operate under mild conditions of temperature, pressure, and pH with high conversion rates, which makes them more efficient than ...
Photoluminescence quantum efficiency (QE) and thermal stability are important for phosphors used in phosphor-converted light-emitting diodes (pc-LEDs). Hydroxyapatite, Ca(PO)OH, is generally not used ...
Particulate hydroxyapatite, Ca (PO) (OH), shows a good biocompatibility and is used as a biomimetic ingredient in dental care formulations due to its similarity to human enamel. Numerous studies show ...
This study evaluates the influence of cost information on decision-making for immobilization for treatment of distal radial buckle fractures. Half of the participants will receive cost inf...
This is set as prospective clinical trial to correlate histologically and radiologically the performance of four different bone grafts (synthetic hydroxyapatite alone, synthetic hydroxyapa...
Permanent pacemaker implantation is one of the most common arrhythmological procedure. This procedure is usually accompanied by a minimum of 2-3 days hospitalization, with immobilization o...
The aim of this study was to evaluate the effect of nanohydroxyapatite associated with low potency laser therapy in eliminating or reducing dentin hypersensitivity in a randomized placebo-...
The study includes healthy young habitually active subjects. All subjects are subjected to two weeks of immobilization of one leg followed by four weeks of training of both legs. The subje...
The personal cost of acute or chronic disease. The cost to the patient may be an economic, social, or psychological cost or personal loss to self, family, or immediate community. The cost of illness may be reflected in absenteeism, productivity, response to treatment, peace of mind, QUALITY OF LIFE, etc. It differs from HEALTH CARE COSTS, meaning the societal cost of providing services related to the delivery of health care, rather than personal impact on individuals.
The assignment, to each of several particular cost-centers, of an equitable proportion of the costs of activities that serve all of them. Cost-center usually refers to institutional departments or services.
A method of comparing the cost of a program with its expected benefits in dollars (or other currency). The benefit-to-cost ratio is a measure of total return expected per unit of money spent. This analysis generally excludes consideration of factors that are not measured ultimately in economic terms. Cost effectiveness compares alternative ways to achieve a specific set of results.
Injury to the nervous system secondary to exposure to lead compounds. Two distinct clinical patterns occur in children (LEAD POISONING, NERVOUS SYSTEM, CHILDHOOD) and adults (LEAD POISONING, NERVOUS SYSTEM, ADULT). In children, lead poisoning typically produces an encephalopathy. In adults, exposure to toxic levels of lead is associated with a peripheral neuropathy.
Poisoning that results from chronic or acute ingestion, injection, inhalation, or skin absorption of LEAD or lead compounds.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...