Impact of Mg rich synthetic gypsum application on the environment and palm oil quality

Sahibin @ Sahibini Abd Rahim, J. Shamshuddin, C. I. Fauziah, O. Radziah, Wan Mohd Razi Idris, M. S.K. Enio

Research output: Contribution to journalArticle

Abstract

A study was conducted in an oil palm plantation in Peninsular Malaysia to elucidate the effects of applying Magnesium Rich Synthetic Gypsum (MRSG), a by-product of chemical plant, on the chemical properties of soil, the uptake of heavy metals by the palm trees, the oil quality and its impact on the surrounding environment. The results showed that MRSG application onto soil cropped to oil palm could bring positive impact in terms of soil chemical properties and oil palm production. The quality of the oil was not significantly affected by the continuous MRSG application as shown by the low heavy metals and trace elements of concern content (Cu: 0.062 mg/kg; Fe: 2.10 mg/kg; Mn: 1.93 mg/kg; Pb: 0.006 mg/kg; Zn: 0.103 mg/kg; Cr: 0.354 mg/kg; Ni: 0.037 mg/kg). From the I-geochem index, the soil was found to have values ranging from −3.81 to −1.03 which is considered as uncontaminated. Further, its application did not result in negative impact on the surrounding environment; hence, the quality of the soil and surface water in the plantation and/or the surrounding area remained intact. Phytotoxic elements in the oil palm tissue (As: 0.12 mg/kg; Se: 0.05 mg/kg; Zn: 1.48 mg/kg; Ce: 0.47 mg/kg; La: 0.26 mg/kg; Sr: 3.03 mg/kg) and cytotoxic elements in the oil were below the acceptable limit. Based on the results of the Environmental Monitoring out during the period of the study, it was concluded that application of the by-product of the chemical plant as a source of Mg to enhance soil fertility in the oil palm plantation was considered safe and sustainable. The effects of applying MRSG and Chinese kieserite was almost similar. So, MRSG can be used as a possible source of Mg to replace Chinese kieserite for oil palm production on the Ultisols in Peninsular Malaysia.

Original languageEnglish
Pages (from-to)573-582
Number of pages10
JournalScience of the Total Environment
Volume652
DOIs
Publication statusPublished - 20 Feb 2019

Fingerprint

Calcium Sulfate
Palm oil
Gypsum
gypsum
Magnesium
Soils
magnesium
oil
Oils
Chemical plants
plantation
Heavy Metals
Chemical properties
Heavy metals
Byproducts
oil production
chemical property
soil
heavy metal
Trace Elements

Keywords

  • Cytotoxic
  • Heavy metals
  • Kieserite
  • Magnesium
  • Rare earth element

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Impact of Mg rich synthetic gypsum application on the environment and palm oil quality. / Abd Rahim, Sahibin @ Sahibini; Shamshuddin, J.; Fauziah, C. I.; Radziah, O.; Idris, Wan Mohd Razi; Enio, M. S.K.

In: Science of the Total Environment, Vol. 652, 20.02.2019, p. 573-582.

Research output: Contribution to journalArticle

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