Reclamation of copper-contaminated soil using EDTA or citric acid coupled with dissolved organic matter solution extracted from distillery sludge

2013 ◽  
Vol 178 ◽  
pp. 97-101 ◽  
Author(s):  
Cheng-Chung Liu ◽  
Ying-Chen Lin
Keyword(s):  
Organic Matter ◽  
Citric Acid ◽  
Dissolved Organic Matter ◽  
Contaminated Soil ◽  
Copper Contaminated

scholarly journals Comparative sorption and desorption of benzo[α]pyrene and 1,2,3-trichlorobenzene by biochar in the presence of dissolved organic matter  

2017 ◽  
Author(s):  
L. Cao ◽  
S. Kuang ◽  
J. Zhang ◽  
H. Wang ◽  
J. Wan
Keyword(s):  
Organic Matter ◽  
Citric Acid ◽  
Dissolved Organic Matter ◽  
Sorption Capacity ◽  
Sorption Isotherms ◽  
Aquatic Environments ◽  
Citric Acid Concentration ◽  
Halogenated Aromatic Hydrocarbons ◽  
Capacity Coefficient ◽  
Desorption Hysteresis

Sorption and desorption of benzo[α]pyrene (BaP) and 1,2,3-trichlorobenzene (TrCB) on biochar prepared from maple wood shavings heated at 500°C were studied in the presence of dissolved organic matter (DOM), including citric acid, l-phenylalanine (L-PH), and peptone. Compared to TrCB, BaP exhibited more nonlinear and stronger sorption on biochar. Nonlinearity of the sorption isotherms increased in the presence of DOM. The presence of citric acid enhanced the sorption capacity and desorption hysteresis of BaP and TrCB on biochar mainly due to the strong sorption of citric acid on the biochar surface. Moreover, there were positive relations between the concentration dependent sorption capacity coefficient (K<sub>d</sub>) values of BaP and TrCB and the citric acid concentration (P &lt; 0.01). In contrast, peptone reduced the sorption capacity and increased the sorption reversibility because of the partition of BaP and TrCB in the peptone solution. L-PH at 50–200 mg/l also leads to a decrease in the sorption capacity and irreversibility attributed to solubilization, although the sorbed L-PH on the biochar surface can slightly increase the BaP and TrCB sorption. At the same concentration, peptone leads to a higher decrease in the BaP and TrCB sorption than L-PH. Also, negative correlations were found between the K<sub>d</sub> values of BaP and TrCB, and the L-PH and peptone concentration (P &lt; 0.05). Our results may help understand the different impacts of DOM on the transport and fate of halogenated aromatic hydrocarbons in aquatic environments polluted with biochars.

scholarly journals Effect of dissolved organic matter on the phytoremediation of Cd-contaminated soil by cotton

2021 ◽  
Vol 226 ◽  
pp. 112842
Author(s):  
Tao Min ◽  
Tong Luo ◽  
Lili Chen ◽  
Weidan Lu ◽  
Yan Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Contaminated Soil

Photochlorination of bisphenol A by UV-Vis light irradiation in saline solution: effects of iron, nitrate and citric acid

2010 ◽  
Vol 7 (6) ◽  
pp. 548 ◽  
Author(s):  
Hui Liu ◽  
Huimin Zhao ◽  
Shuo Chen ◽  
Xie Quan ◽  
Yaobin Zhang
Keyword(s):  
Organic Matter ◽  
Citric Acid ◽  
Dissolved Organic Matter ◽  
Bisphenol A ◽  
Organic Compounds ◽  
Anthropogenic Sources ◽  
Aqueous Environment ◽  
Iron Nitrate ◽  
Chlorinated Organic Compounds ◽  
Chlorinated Organic

Environmental context Chlorinated organic compounds are ubiquitous in the environment, and cause concern owing to their persistence and toxicity to organisms. In addition to anthropogenic sources, photochemical processes in saline waters could also yield chlorinated organic compounds. The present paper investigates the effects of iron, pH, nitrate and dissolved organic matter on the photochlorination of bisphenol A, a widely distributed endocrine disrupting chemical. Abstract Effects of several key influencing factors of environmental photochemistry, including iron, nitrate and dissolved organic matter (DOM), on the photochlorination of bisphenol A (BPA) were investigated. Iron promoted the formation of chlorinated BPA, but the rate decreased with increasing pH. This result was consistent with the results of laser flash photolysis, which showed that high pH decreased the formation of reactive chlorine species (chlorine radical, Cl•/Cl2•–). Nitrate ion and citric acid, which was selected as an analogue of DOM, inhibited the chlorination of BPA separately. The results presented in this paper are helpful to get some idea of the degree of photochemical chlorination in aqueous environment.

Copper Mobility in a Copper-Contaminated Sandy Soil as Affected by pH and Solid and Dissolved Organic Matter

1997 ◽  
Vol 31 (4) ◽  
pp. 1109-1115 ◽  
Author(s):  
Erwin J. M. Temminghoff ◽  
Sjoerd E. A. T. M. Van der Zee ◽  
Frans A. M. de Haan
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Sandy Soil ◽  
Copper Contaminated
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