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    <front>
        <journal-meta>
            <journal-id journal-id-type="publisher-id">2023-1</journal-id>
            <journal-id journal-id-type="publisher-acronym">VSNiP</journal-id>

            <journal-title-group>
                <journal-title>Problems of Contemporary Science and Practice. Vernadsky University</journal-title>
                <trans-title-group xml:lang="ru">
                    <trans-title>Вопросы современной науки и практики. Университет имени В.И. Вернадского</trans-title>
                </trans-title-group>
            </journal-title-group>

            <issn publication-format="electronic">2541-853X</issn>
            <issn publication-format="print">1990-9047</issn>

            <publisher>
                <publisher-name>ФГБОУ ВО «Тамбовский государственный технический университет»</publisher-name>
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            <article-id pub-id-type="doi">10.17277/voprosy.2023.01.pp.009-019</article-id>
            <article-id pub-id-type="publisher-id">12360</article-id>

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                    <subject></subject>
                </subj-group>
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            <title-group>
                <article-title>A Study of Ni2+ Ions Adsorption from Aqueous Solution by Acacia auriculiformis Bark Modified with Weakly Concentrated Acid Sulfuric Solutions</article-title>
                <trans-title-group xml:lang="ru">
                    <trans-title>Исследование адсорбции ионов Ni2+ из водных растворов сернокислотомодифицированной корой акации ушковидной (Acacia auriculiformis)</trans-title>
                </trans-title-group>
            </title-group>

            <contrib-group>
                <contrib contrib-type="author">
                    <name>
                        <surname>Galimova</surname>
                        <given-names>R. Z.</given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3652"></xref>
                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname>Nguyen T.K.T.</surname>
                        <given-names></given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3653"></xref>
                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname></surname>
                        <given-names></given-names>
                    </name>
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                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname></surname>
                        <given-names></given-names>
                    </name>
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                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname>Galimova</surname>
                        <given-names>R. Z.</given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3656"></xref>
                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname>Nguyen</surname>
                        <given-names>D. A.</given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3657"></xref>
                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname>Shaikhiev I.G</surname>
                        <given-names></given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3658"></xref>
                </contrib>
<contrib contrib-type="author">
                    <name>
                        <surname>Nguyen T.K.T.</surname>
                        <given-names></given-names>
                    </name>
                    <xref ref-type="aff" rid="AF3659"></xref>
                </contrib>

<aff id="AF3652"></aff>
<aff id="AF3653"></aff>
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                        <kwd-group xml:lang="en">
                                <kwd>Ni2+ ions</kwd>
                                <kwd>Acacia auriculiformis bark</kwd>
                                <kwd>isotherm</kwd>
                                <kwd>kinetics</kwd>
                                <kwd>thermodynamic parameter</kwd>
                                <kwd>modification</kwd>
                                <kwd>adsorption</kwd>
                                <kwd>endothermic</kwd>
                            </kwd-group>
                                    <kwd-group xml:lang="ru">
                                <kwd>адсорбция</kwd>
                                <kwd>изотерма</kwd>
                                <kwd>ионы Ni2+</kwd>
                                <kwd>кинетика</kwd>
                                <kwd>кора Acacia auriculiformis</kwd>
                                <kwd>модификация</kwd>
                                <kwd>термодинамический параметр</kwd>
                                <kwd>эндотермический процесс</kwd>
                            </kwd-group>
            
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                <year>2023</year>
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            <pub-date publication-format="print" date-type="cover">
                <string-date>1 квартал 2023 года</string-date>
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            <volume>1</volume>
            <issue>1</issue>
            <issue-id pub-id-type="other">1</issue-id>

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            <permissions>
                <copyright-statement>© 2023 Вопросы современной науки и практики. Университет имени В.И. Вернадского</copyright-statement>
                <copyright-year>2023</copyright-year>
                <copyright-holder>R. Z. Galimova,  Nguyen T.K.T.,  ,  , R. Z. Galimova, D. A. Nguyen,  Shaikhiev I.G,  Nguyen T.K.T.</copyright-holder>
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            <abstract>
                <p>&lt;br /&gt;
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                        <trans-abstract xml:lang="ru">
                <p>Исследована адсорбция ионов Ni2+  корой акации ушковидной (Acacia auriculiformis), нативной и модифицированной в слабоконцентрированных (1 – 3 %) растворах серной кислоты. Установлено, что изотермы адсорбции ионов Ni2+ нативной и моди-фицированной корой Acacia auriculiformis относятся к изотермам I типа, согласно классификации ИЮПАК, и L-типу, согласно классификации Гильса. Выявлено, что с повышением концентрации растворов серной кислоты сорбционная емкость модифицированных образцов коры Acacia auriculiformis по ионам Ni2+ увеличивается. Показано, что кинетическое уравнение псевдовторого порядка достаточно хорошо согласуется с экспериментальными данными. Определены уравнения регрессии и коэффициенты аппроксимации, а также термодинамические параметры процессов (энергия сорбции 
и энергия Гиббса). При рассмотрении кинетических зависимостей в рамках диффузионной модели Бойда рассчитаны коэффициенты Био для исследуемых процессов, значения которых соответствуют протеканию процессов смешанной диффузии.
</p>
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