Biogeochemistry of trace elements in the environment - Editorial to the special issue

Rinklebe, J.,Kumpiene, J.,Du Laing, G.,Ok, Y.S. Academic Press 2017 Journal of environmental management Vol.186 No.2

Metal organic framework derived Cu–carbon composite: An efficient non-noble metal catalyst for reduction of hexavalent chromium and pendimethalin

Hasan, Zubair,Cho, Jinwoo,Rinklebe, Jö,rg,Ok, Yong Sik,Cho, Dong-Wan,Song, Hocheol Elsevier 2017 Journal of industrial and engineering chemistry Vol.52 No.-

<P><B>Abstract</B></P> <P>A Cu–carbon composite was facilely synthesized via one step calcination of a Cu-based metal organic frameworks (MOF), HKUST-1, under N<SUB>2</SUB> atmosphere. Physicochemical characteristics of the composite were examined with a series of spectroscopy and surface analyzer. The composite was used as a catalyst in the reduction of Cr(VI) and pendimethalin using HCOOH and NaBH<SUB>4</SUB> as reductants, respectively. The composite was very efficient in both reduction reactions, completing the reactions in several minutes. The composite also exhibited a robust reusability in the completion of four repeated Cr(VI) reduction cycles, demonstrating its potential utility as an alternative to noble-metal catalysts.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Calcination of Cu-based metal organic framework (HKUST-1) to Cu–carbon composite. </LI> <LI> The composite showed high catalytic activity to reduce Cr(VI) and pendimethalin. </LI> <LI> The composite exhibited a robust reusability during repeated reduction cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Metal organic framework derived Cu–carbon composite: An efficient non-noble metal catalyst for reduction of hexavalent chromium and pendimethalin

Zubair Hasan,최진우,Jörg Rinklebe,오용식,조동완,송호철 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-

A Cu–carbon composite was facilely synthesized via one step calcination of a Cu-based metal organicframeworks (MOF), HKUST-1, under N2 atmosphere. Physicochemical characteristics of the compositewere examined with a series of spectroscopy and surface analyzer. The composite was used as a catalystin the reduction of Cr(VI) and pendimethalin using HCOOH and NaBH4 as reductants, respectively. Thecomposite was very efficient in both reduction reactions, completing the reactions in several minutes. The composite also exhibited a robust reusability in the completion of four repeated Cr(VI) reductioncycles, demonstrating its potential utility as an alternative to noble-metal catalysts.

Elimination of selected personal care products using biological augmentation with biochars

Yi YANG,Yiu Fai TSANG,Jorg RINKLEBE,Yong Sik Ok 대한환경공학회 2019 대한환경공학회 학술발표논문집 Vol.2019 No.-

N doped cobalt-carbon composite for reduction of <i>p</i>-nitrophenol and pendimethaline

Hasan, Zubair,Ok, Yong Sik,Rinklebe, Jö,rg,Tsang, Yiu Fai,Cho, Dong-Wan,Song, Hocheol Elsevier 2017 Journal of alloys and compounds Vol.703 No.-

<P><B>Abstract</B></P> <P>A novel and magnetically separable N doped-cobalt carbon composite (Co-NC) was facilely synthesized via thermal treatment of Co<SUB>3</SUB>O<SUB>4</SUB>-melamine mixture in atmospheric condition. The physicochemical properties of the composite were characterized with X-ray diffractometer, Raman spectroscopy, SQUID magnetometer, scanning electron microscope, and X-ray photoelectron spectroscopy. The catalytic ability of the composite was evaluated in reduction of <I>p</I>-nitrophenol and pendimethalin using NaBH<SUB>4</SUB> as a reductant. The composite showed a good catalytic performance to completely reduce 20 mg L<SUP>−1</SUP> of <I>p</I>-nitrophenol within 7.5 min, and 44 mg L<SUP>−1</SUP> of pendimethaline within 20 min at a dose of 0.27 mg mL<SUP>−1</SUP> and 0.32 mg mL<SUP>-1</SUP>, respectively. The composite also displayed a robust reusability with a small loss of catalytic activity in completion of four repetitive <I>p</I>-nitrophenol reduction cycles, demonstrating its potential utility as an alternative to noble-metal catalysts.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Magnetically separable N doped-cobalt carbon composite prepared via calcinations of Co<SUB>3</SUB>O<SUB>4</SUB> and melamine. </LI> <LI> Excellent performance for the reduction of <I>p</I>-nitrophenol and pendimethalin. </LI> <LI> First non-noble metal catalyst applied to catalytic reduction of pendimethalin. </LI> </UL> </P>

Mechanistic insights into red mud, blast furnace slag, or metakaolin-assisted stabilization/solidification of arsenic-contaminated sediment

Wang, Lei,Chen, Liang,Tsang, Daniel C.W.,Zhou, Yaoyu,Rinklebe, Jö,rg,Song, Hocheol,Kwon, Eilhann E.,Baek, Kitae,Sik Ok, Yong Elsevier 2019 Environment international Vol.133 No.2

<P><B>Abstract</B></P> <P>Elevated level of arsenic (As) in marine sediment via deposition and accumulation presents long-term ecological risks. This study proposed a sustainable stabilization/solidification (S/S) of As-contaminated sediment via novel valorization of red mud waste, blast furnace slag and calcined clay mineral, which were selected to mitigate the increased leaching of As under alkaline environment of S/S treatment. Quantitative X-ray diffraction and thermogravimetric analyses illustrated that stable Ca-As complexes (e.g., Ca<SUB>5</SUB>(AsO<SUB>4</SUB>)<SUB>3</SUB>OH) could be formed at the expense of Ca(OH)<SUB>2</SUB> consumption, which inevitably hindered the hydration process and S/S efficiency. The <SUP>29</SUP>Si nuclear magnetic resonance analysis revealed that incorporation of metakaolin for As immobilization resulted in a low degree of hydration and polymerization, whereas addition of red mud promoted Fe-As complexation and demonstrated excellent compatibility with As. Transmission electron microscopy and elemental mapping further confirmed the precipitation of crystalline Ca-As and amorphous Fe-As compounds. Therefore, red mud-incorporated S/S binder achieved the highest efficiency of As immobilization (99.9%), which proved to be applicable for both <I>in-situ</I> and <I>ex-situ</I> S/S of As-contaminated sediment. These results advance our mechanistic understanding for the design of green and sustainable remediation approach for effective As immobilization.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Stable Ca-As complexes could be formed at the expense of Ca(OH)<SUB>2</SUB> consumption. </LI> <LI> Metakaolin addition for S/S of As resulted in a low degree of hydration and polymerization. </LI> <LI> Incorporation of red mud promoted Fe-As complexation and improved compatibility with As. </LI> <LI> Green binders were applicable for both <I>in-situ</I> and <I>ex-situ</I> S/S of contaminated sediment. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Cadmium phytoremediation potential of <i>Brassica</i> crop species: A review

Rizwan, Muhammad,Ali, Shafaqat,Zia ur Rehman, Muhammad,Rinklebe, Jö,rg,Tsang, Daniel C.W.,Bashir, Arooj,Maqbool, Arosha,Tack, F.M.G.,Ok, Yong Sik Elsevier 2018 Science of the Total Environment Vol.631 No.-

<P><B>Abstract</B></P> <P>Cadmium (Cd) is a highly toxic metal released into the environment through anthropogenic activities. Phytoremediation is a green technology used for the stabilization or remediation of Cd-contaminated soils. <I>Brassica</I> crop species can produce high biomass under a range of climatic and growing conditions, allowing for considerable uptake and accumulation of Cd, depending on species. These crop species can tolerate Cd stress via different mechanisms, including the stimulation of the antioxidant defense system, chelation, compartmentation of Cd into metabolically inactive parts, and accumulation of total amino-acids and osmoprotectants. A higher Cd-stress level, however, overcomes the defense system and may cause oxidative stress in <I>Brassica</I> species due to overproduction of reactive oxygen species and lipid peroxidation. Therefore, numerous approaches have been followed to decrease Cd toxicity in <I>Brassica</I> species, including selection of Cd-tolerant cultivars, the use of inorganic and organic amendments, exogenous application of soil organisms, and employment of plant-growth regulators. Furthermore, the coupling of genetic engineering with cropping may also help to alleviate Cd toxicity in <I>Brassica</I> species. However, several field studies demonstrated contrasting results. This review suggests that the combination of Cd-tolerant <I>Brassica</I> cultivars and the application of soil amendments, along with proper agricultural practices, may be the most efficient means of the soil Cd phytoattenuation. Breeding and selection of Cd-tolerant species, as well as species with higher biomass production, might be needed in the future when aiming to use <I>Brassica</I> species for phytoremediation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Brassica</I> species can be considered a potential candidate for Cd phytoremediation. </LI> <LI> <I>Brassica</I> species can accumulate most of the soil Cd in its parts. </LI> <LI> Different amendments can be applied to enhance Cd tolerance in <I>Brassica</I> species. </LI> <LI> Integrated agricultural practices can be used to enhance Cd uptake in <I>Brassica</I> species. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Evaluating the feasibility of pyrophyllite-based ceramic membranes for treating domestic wastewater in anaerobic ceramic membrane bioreactors

Jeong, Yeongmi,Cho, Kyungjin,Kwon, Eilhann E.,Tsang, Yiu Fai,Rinklebe, Jö,rg,Park, Chanhyuk Elsevier 2017 Chemical engineering journal Vol.328 No.-

<P><B>Abstract</B></P> <P>This study laid great emphasis on anaerobic ceramic membrane bioreactor (AnCMBR) treatment of domestic wastewater for facile and enhanced energy recovery. To this end, the performance of the natural-based ceramic (<I>i.e.</I>, pyrophyllite-based) membranes was mainly explored in this study by evaluating filtration and treatment performances. 92.9±5.5% chemical oxygen demand (COD) removal and stable methane production were successfully achieved in a bench-scale AnCMBR while maintaining a slightly long hydraulic retention time (HRT). Comparative filtration experiments with commercialized ceramic membranes suggested that the pyrophyllite-based membrane separation in AnCMBR treatment of wastewater at long HRT is feasible. However, short HRT operations resulted in substantial levels of sludge washout. Future improvements of AnCMBR technology in cost-effective ceramic membrane development, increased flux, and harsh environmental conditions would make AnCMBR competitive with anaerobic membrane bioreactor (AnMBR) technology.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pyrophyllite-based ceramic membranes applied to anaerobic membrane bioreactors. </LI> <LI> This novel approach achieved higher organic removal and methane yield at long HRTs. </LI> <LI> Short HRT operations resulted in substantial levels of sludge washout. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Impact of sugarcane bagasse-derived biochar on heavy metal availability and microbial activity: A field study

Nie, Chengrong,Yang, Xing,Niazi, Nabeel Khan,Xu, Xiaoya,Wen, Yuhui,Rinklebe, Jö,rg,Ok, Yong Sik,Xu, Song,Wang, Hailong Elsevier 2018 CHEMOSPHERE - Vol.200 No.-

<P><B>Abstract</B></P> <P>In the current study, we conducted a field experiment using the test plant, <I>Brassica chinesis</I> L. (pak choi), to investigate the effect of sugarcane bagasse-derived biochar on the bioavailability of cadmium (Cd), copper (Cu) and lead (Pb), and the health of soil microbiota in a contaminated soil. Biochar application significantly (<I>P</I> < 0.05) increased pak choi yield. Bioavailability of heavy metals to plant shoots and roots decreased with increasing biochar application rates (at 0, 1.5, 2.25 and 3.0 t ha<SUP>−1</SUP>). Sequential extraction of the biochar-treated and -untreated soil revealed that exchangeable Cd reduced whereas organically-bound fraction increased with increasing biochar rate. The labile fractions of Cu and Pb decreased, but the residual fraction increased in biochar-treated soils compared to the control. Urease, catalase and invertase activities, and the populations of bacteria and actinomycetes were significantly enhanced, whereas fungi population declined in biochar-treated soils. This study highlights that sugarcane bagasse biochar has the potential to support the remediation of soils contaminated with heavy metals, and as such can improve the yield and quality of agricultural crops.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sugarcane bagasse biochar amendment reduced availability of Cd, Cu and Pb in soils. </LI> <LI> Heavy metals were less labile in the biochar-treated soils. </LI> <LI> Biochar amendment induced an increase in soil enzyme and microbial activity. </LI> <LI> Edible part of pak choi was safer for human consumption after biochar amendment. </LI> </UL> </P>

Soil lead immobilization by biochars in short-term laboratory incubation studies

Igalavithana, Avanthi Deshani,Kwon, Eilhann E.,Vithanage, Meththika,Rinklebe, Jö,rg,Moon, Deok Hyun,Meers, Erik,Tsang, Daniel C.W.,Ok, Yong Sik Pergamon 2019 Environment international Vol.127 No.-

<P><B>Abstract</B></P> <P>Exchangeable lead (Pb) extracted by ammonium acetate from three independent incubation studies was assessed to understand the influence of feedstock, pyrolysis temperatures, and production conditions on Pb immobilization capacities of different biochars. Vegetable waste biochar, pine cone, wood bark, cocopeat, red pepper stalk, and palm kernel shell were used as feedstocks (food supply and agricultural wastes) to produce biochars at 200–650 °C with and without N<SUB>2</SUB>/CO<SUB>2</SUB>. Biochars were applied at 5 and 2.5% (w w<SUP>−1</SUP>) to a Pb contaminated (i.e., 1445 mg kg<SUP>−1</SUP>) agricultural soil collected near an old mine. Lead immobilization in biochar treated soils at the end of incubation period was normalized per gram of biochar applied. Biochar produced from vegetable waste at 500 °C showed the highest Pb immobilization (87%) and highest total exchangeable cations (13.5 cmol<SUB>(+)</SUB> kg<SUP>−1</SUP>) at the end of the 45 d incubation period. However, on the basis of Pb immobilization per gram of biochar, red pepper stalk biochar produced in CO<SUB>2</SUB> at 650 °C was the best in Pb immobilization (0.09 mg kg<SUP>−1</SUP> g<SUP>−1</SUP> biochar) compared to the other biochars. The enhanced ability to immobilize Pb by biochar produced in CO<SUB>2</SUB> could be due to the presence of siloxanes (SiOSi) on biochar surface. Pearson correlation analysis revealed that alkaline pH, ash%, and N% of biochars influence in Pb immobilization and exchangeable cation availability in soil. Biochar production atmosphere considerably change its properties that influence Pb immobilization. Further studies are needed on the modification of properties and Pb immobilization by biochars produced from various feedstocks in CO<SUB>2</SUB>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Biochar production feedstock and temperature affect Pb immobilization in soil. </LI> <LI> Pb immobilization by biochar can be enhanced by mixing feedstocks. </LI> <LI> Biochar produced in CO<SUB>2</SUB> showed the highest Pb immobilization ability. </LI> <LI> Biochar produced in CO<SUB>2</SUB> increased the exchangeable cations in soil. </LI> </UL> </P>