Kinetics of the sorption of heavy-metal ions by a sorbent obtained from boric acid production waste

Yarusova, S. B.; Гордиенко, П. С.; Yudakov, A. A.; Azarova, Yu. A.; Yashchuk, R. D.

doi:10.1134/s0040579516050250

Cited by 12 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The 5-year laboratory-prepared CCF used in this study have been shown to remove 45.2, 38.4 and 56.0 mg g −1 of Cd 2+ , Co 2+ and MoO 4 2− , respectively, under steady state conditions from single metal nitrate solutions of up to 1500 ppm (Figure 5). The equilibrium uptakes of Cd 2+ , Co 2+ and MoO 4 2− by CCF are compared with those of other cement-based and inorganic sorbents in Table 5 [5,6,[13][14][15]32,[40][41][42][43][44][45][46][47][48]. The removal capacity of CCF for Co 2+ and MoO 4 2− was found to be superior to those of other sorbents reported in the literature; whereas the uptake of Cd 2+ appeared in the middle of the range (Table 5).…”

Section: Discussionmentioning

confidence: 92%

“…In general, equilibration times for the removal of aqueous metal species by calcium silicatebased inorganic sorbents, involving lattice substitution and co-precipitation mechanisms, tend to be appreciably longer (24 h or more) than those of polymeric organic sorbents, such as chitosan, for which steady state uptake by ion-exchange with functional groups can often be achieved within minutes [49][50][51]. Lack of kinetic efficiency can limit the potential industrial wastewater treatment applications of sorbents, particularly CCF, whose equilibration times for the removal of Cd 2+ (120 h), Co 2+ (120 h) and MoO 4 2− (168 h) are typically longer than those of other calcium silicates [42][43][44]. 1 C i = initial metal concentration in solution.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Interactions of Cd2+, Co2+ and MoO42− Ions with Crushed Concrete Fines

Elmes

Coleman

2021

J. Compos. Sci.

View full text Add to dashboard Cite

Construction and demolition activities generate approximately two thirds of the world’s waste, with concrete-based demolition material accounting for the largest proportion. Primary aggregates are recovered and reused, although the cement-rich fine fraction is underutilised. In this study, single metal batch sorption experiments confirmed that crushed concrete fines (CCF) are an effective sorbent for the maximum exclusion of 45.2 mg g−1 Cd2+, 38.4 mg g−1 Co2+ and 56.0 mg g−1 MoO42− ions from aqueous media. The principal mechanisms of sorption were determined, by scanning electron microscopy of the metal-laden CCF, to be co-precipitation with Ca2+ ions released from the cement to form solubility limiting phases. The removal of Co2+ and MoO42− ions followed a zero-order reaction and that of Cd2+ was best described by a pseudo-second-order model. The Langmuir model provided the most appropriate description of the steady state immobilisation of Cd2+ and Co2+, whereas the removal of MoO42− conformed to the Freundlich isotherm. Long equilibration times (>120 h), loose floc formation and high pH are likely to limit the use of CCF in many conventional wastewater treatment applications; although, these properties could be usefully exploited in reactive barriers for the management of contaminated soils, sediments and groundwater.

show abstract

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Interactions of Cd2+, Co2+ and MoO42− Ions with Crushed Concrete Fines

Elmes

Coleman

2021

J. Compos. Sci.

View full text Add to dashboard Cite

show abstract

“…Получаемые из борогипса силикаты кальция показали свою эффективность при сорбции ряда ионов тяжелых металлов (Zn 2+ , Co 2+ , Ni 2+ , Cd 2+ , Mn 2+ ). Наполнители на основе силикатов кальция, синтезированных при различных условиях из борогипса, показали свою эффективность при получении бетона с повышенной прочностью и морозостойкостью [12,13].…”

Section: основная частьunclassified

Участие Студентов В Научно-Исследовательской Деятельности По Разработке Природоохранных Технологий: Практика Вуза

Ярусова¹,

Иваненко²

2022

ТНВ

View full text Add to dashboard Cite

Практическая направленность учебного процесса с вовлечением специалистов соответствующей сферы лежит в основе конкурентоспособности каждого современного университета и является обязательным элементом эффективной подготовки выпускников. В работе показано, что создание базовых кафедр позволяет если не устранить, то в существенной степени сократить системный разрыв между уровнем подготовки студентов в университетах и степенью эффективности их последующей практической деятельности, что актуально в настоящее время. Целью данной статьи является анализ и оценка основных результатов научно-исследовательских работ с участием студентов для развития основ современных технологий охраны окружающей среды на примере деятельности базовой кафедры экологии и экологических проблем химической технологии (БК ЭЭПХТ) ВГУЭС и Института химии ДВО РАН (ИХ ДВО РАН). Методической основой исследования является анализ опыта БК ЭЭПХТ с использованием методов сравнительного анализа, анализа и систематизации результатов научно-исследовательской деятельности. Научная новизна: представлена модель организации научно-исследовательской работы студентов в вузе. Практическая значимость исследования: на примере научно-исследовательской деятельности кафедры показана эффективность привлечения студентов к реализации научных направлений, связанных с развитием природоохранных технологий. Положительный опыт ВГУЭС в области экологического образования свидетельствует о том, что в систему практико-интегрированного обучения должны быть включены научно-исследовательские организации, а также должны создаваться совместные подразделения (базовые кафедры), обеспечивающие качественную подготовку экологов путем реализации различных проектов. Ключевые слова: научно-исследовательская деятельность, базовые кафедры, технологии охраны окружающей среды, рациональное природопользование, экология.

show abstract

“…It has been established (Arefieva et al 2015;Sheveleva et al 2009;Zemnukhova et al 2017;Yarusova et al 2016Yarusova et al , 2019aGordienko et al 2012) that siliconcontaining compounds extracted from industrial and agricultural plant waste (rice husk, borogypsum) have good adsorption and other properties, which makes it possible to use them as sorbents for removing organic compounds (Arefieva et al 2015;Zemnukhova et al 2017;Yarusova et al 2019a;Abukhadra & Shaban 2019), heavy metals and radionuclides from aqueous media (Sheveleva et al 2009;Gordienko et al 2012;Sharaf & Hassan 2014;Yarusova et al 2016Yarusova et al , 2019bYarusova et al , 2019c, obtaining modifying additives in concretes and other building materials (Yarusova et al 2018;Nana et al 2021), as well as to create new composite materials (Garcia-Mejia et al 2020;Sethuramalingam et al 2021). This positive experience with the use of local waste to solve environmental and other industrial problems, as well as the accumulation of multitonnage waste requiring disposal, has promoted further research in this area.…”

Section: Introductionmentioning

confidence: 99%

Use of silicate by-products in water treatment processes and development of eco-friendly self-polishing antifouling coatings

Kharchenko

Земнухова

Yarusova

et al. 2021

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The production waste involvement in processing and recycling-one of the urgent tasks in the development of environmentally oriented and resource-saving technologies. In this work, two types of silicate-containing materials of plant (silicon dioxide from rice husk) and technogenic (calcium hydrosilicate) origin are studied as sorbents for removal of heterotrophic bacteria from water and as fillers for eco-friendly marine antifouling coatings. Characterizations (morphology, chemical composition, specific surface area, zeta-potential), bacterial adsorption performance and prepared samples efficiency in antifouling coating were investigated. The results showed that the sample of calcium hydrosilicate obtained from technogenic raw materials has a macroporous needle-like structure and characterized by high removal efficiency to Escherichia coli and Bacillus subtilis in 0,05 M NaCl. Sample of biogenic silicon dioxide characterized by globular micromorphology with high value of specific surface area. Incorporation of inorganic filler particles of biogenic and technogenic samples in the coating enhanced the paint hardness. Improved antifouling performance was shown for coatings with SiO 2 from rice husk coupled with bacterial antifouling extract during 9 months of field test.

show abstract

Kinetics of the sorption of heavy-metal ions by a sorbent obtained from boric acid production waste

Cited by 12 publications

References 14 publications

Interactions of Cd2+, Co2+ and MoO42− Ions with Crushed Concrete Fines

Interactions of Cd2+, Co2+ and MoO42− Ions with Crushed Concrete Fines

Участие Студентов В Научно-Исследовательской Деятельности По Разработке Природоохранных Технологий: Практика Вуза

Use of silicate by-products in water treatment processes and development of eco-friendly self-polishing antifouling coatings

Contact Info

Product

Resources

About